Severe Storms

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0200 PM CST Fri Jan 05 2024 Valid 052000Z - 061200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ALONG PARTS OF THE LA/MS/AL/FL GULF COASTS... ...SUMMARY... Isolated severe thunderstorms may occur along the Gulf Coast this afternoon through tonight, including coastal areas of Louisiana, Mississippi, Alabama, and the Florida Panhandle. ...20Z Update... The Marginal Risk and general thunderstorm areas have been trimmed from the west across parts of the TX and LA Gulf Coasts, to reflect the eastward advance of extensive convection extending from the northwest Gulf of Mexico into southern LA. Otherwise, no changes have been made. Substantial organized convection is expected to remain mostly over the Gulf of Mexico through tonight, with only very weak surface-based instability expected inland. However, some threat for a tornado or two and/or locally damaging wind could spread inland as stronger storms over the Gulf approach the coast. See the previous discussion below for more information. ..Dean.. 01/05/2024 .PREV DISCUSSION... /ISSUED 1026 AM CST Fri Jan 05 2024/ ...Gulf Coast Region... Morning water vapory imagery shows a strong upper trough progressing eastward across TX/OK, with a 70-80 knot mid-level jet extending across south TX into the western Gulf of Mexico. A surface low associated with this upper trough and jet is positioned just south of the Upper Texas coast, where a line of strong storms extends from the coast southward into the Gulf. Low-level trajectories have been slow to back to southerly, resulting in a limited northward transport of rich moisture/instability. Onshore thunderstorm activity is in an environment of surface dewpoints only in the 50s, and should remain elevated in nature through much of the afternoon. Visible satellite imagery shows multiple small cellular convective elements well offshore, tracking northeastward. With continued daytime heating, a few of these cells may organized/intensify and drift toward southern LA late this afternoon and evening. Shear profiles would pose a risk of supercells, but it remains unclear how far inland the risk of surface-based convection will spread. Any storms in this regime that are surface-based would represent a risk of gusty/damaging wind gusts or a tornado. A similar threat will persist overnight as the convective cluster moves eastward along the MS/AL/FL coast. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0200 PM CST Fri Jan 05 2024 Valid 052000Z - 061200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ALONG PARTS OF THE LA/MS/AL/FL GULF COASTS... ...SUMMARY... Isolated severe thunderstorms may occur along the Gulf Coast this afternoon through tonight, including coastal areas of Louisiana, Mississippi, Alabama, and the Florida Panhandle. ...20Z Update... The Marginal Risk and general thunderstorm areas have been trimmed from the west across parts of the TX and LA Gulf Coasts, to reflect the eastward advance of extensive convection extending from the northwest Gulf of Mexico into southern LA. Otherwise, no changes have been made. Substantial organized convection is expected to remain mostly over the Gulf of Mexico through tonight, with only very weak surface-based instability expected inland. However, some threat for a tornado or two and/or locally damaging wind could spread inland as stronger storms over the Gulf approach the coast. See the previous discussion below for more information. ..Dean.. 01/05/2024 .PREV DISCUSSION... /ISSUED 1026 AM CST Fri Jan 05 2024/ ...Gulf Coast Region... Morning water vapory imagery shows a strong upper trough progressing eastward across TX/OK, with a 70-80 knot mid-level jet extending across south TX into the western Gulf of Mexico. A surface low associated with this upper trough and jet is positioned just south of the Upper Texas coast, where a line of strong storms extends from the coast southward into the Gulf. Low-level trajectories have been slow to back to southerly, resulting in a limited northward transport of rich moisture/instability. Onshore thunderstorm activity is in an environment of surface dewpoints only in the 50s, and should remain elevated in nature through much of the afternoon. Visible satellite imagery shows multiple small cellular convective elements well offshore, tracking northeastward. With continued daytime heating, a few of these cells may organized/intensify and drift toward southern LA late this afternoon and evening. Shear profiles would pose a risk of supercells, but it remains unclear how far inland the risk of surface-based convection will spread. Any storms in this regime that are surface-based would represent a risk of gusty/damaging wind gusts or a tornado. A similar threat will persist overnight as the convective cluster moves eastward along the MS/AL/FL coast. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0200 PM CST Fri Jan 05 2024 Valid 052000Z - 061200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ALONG PARTS OF THE LA/MS/AL/FL GULF COASTS... ...SUMMARY... Isolated severe thunderstorms may occur along the Gulf Coast this afternoon through tonight, including coastal areas of Louisiana, Mississippi, Alabama, and the Florida Panhandle. ...20Z Update... The Marginal Risk and general thunderstorm areas have been trimmed from the west across parts of the TX and LA Gulf Coasts, to reflect the eastward advance of extensive convection extending from the northwest Gulf of Mexico into southern LA. Otherwise, no changes have been made. Substantial organized convection is expected to remain mostly over the Gulf of Mexico through tonight, with only very weak surface-based instability expected inland. However, some threat for a tornado or two and/or locally damaging wind could spread inland as stronger storms over the Gulf approach the coast. See the previous discussion below for more information. ..Dean.. 01/05/2024 .PREV DISCUSSION... /ISSUED 1026 AM CST Fri Jan 05 2024/ ...Gulf Coast Region... Morning water vapory imagery shows a strong upper trough progressing eastward across TX/OK, with a 70-80 knot mid-level jet extending across south TX into the western Gulf of Mexico. A surface low associated with this upper trough and jet is positioned just south of the Upper Texas coast, where a line of strong storms extends from the coast southward into the Gulf. Low-level trajectories have been slow to back to southerly, resulting in a limited northward transport of rich moisture/instability. Onshore thunderstorm activity is in an environment of surface dewpoints only in the 50s, and should remain elevated in nature through much of the afternoon. Visible satellite imagery shows multiple small cellular convective elements well offshore, tracking northeastward. With continued daytime heating, a few of these cells may organized/intensify and drift toward southern LA late this afternoon and evening. Shear profiles would pose a risk of supercells, but it remains unclear how far inland the risk of surface-based convection will spread. Any storms in this regime that are surface-based would represent a risk of gusty/damaging wind gusts or a tornado. A similar threat will persist overnight as the convective cluster moves eastward along the MS/AL/FL coast. Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1218 PM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... No changes to the ongoing forecast. ..Wendt.. 01/05/2024 .PREV DISCUSSION... /ISSUED 0203 AM CST Fri Jan 05 2024/ ...Synopsis... Active mid-level flow will continue over the CONUS into D2/Saturday as the eastern US shortwave trough continues to approaches the Atlantic Coast. The accompanying surface low is forecast to intensify through the forecast period, bringing widespread precipitation the Mid Atlantic and Northeast States. At the same time, a second trough will approach the Pacific coast as mid-level flow intensifies over the southern third of the CONUS. Widespread precipitation is forecast to develop over the West while a cool air mass resides over the central US. Outside of locally breezy winds across parts of the far southern Plains, dry and windy conditions are not expected to overlap with areas of dry fuels. Fire-weather concerns are low. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1218 PM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... No changes to the ongoing forecast. ..Wendt.. 01/05/2024 .PREV DISCUSSION... /ISSUED 0203 AM CST Fri Jan 05 2024/ ...Synopsis... Active mid-level flow will continue over the CONUS into D2/Saturday as the eastern US shortwave trough continues to approaches the Atlantic Coast. The accompanying surface low is forecast to intensify through the forecast period, bringing widespread precipitation the Mid Atlantic and Northeast States. At the same time, a second trough will approach the Pacific coast as mid-level flow intensifies over the southern third of the CONUS. Widespread precipitation is forecast to develop over the West while a cool air mass resides over the central US. Outside of locally breezy winds across parts of the far southern Plains, dry and windy conditions are not expected to overlap with areas of dry fuels. Fire-weather concerns are low. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1218 PM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... No changes to the ongoing forecast. ..Wendt.. 01/05/2024 .PREV DISCUSSION... /ISSUED 0203 AM CST Fri Jan 05 2024/ ...Synopsis... Active mid-level flow will continue over the CONUS into D2/Saturday as the eastern US shortwave trough continues to approaches the Atlantic Coast. The accompanying surface low is forecast to intensify through the forecast period, bringing widespread precipitation the Mid Atlantic and Northeast States. At the same time, a second trough will approach the Pacific coast as mid-level flow intensifies over the southern third of the CONUS. Widespread precipitation is forecast to develop over the West while a cool air mass resides over the central US. Outside of locally breezy winds across parts of the far southern Plains, dry and windy conditions are not expected to overlap with areas of dry fuels. Fire-weather concerns are low. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1218 PM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... No changes to the ongoing forecast. ..Wendt.. 01/05/2024 .PREV DISCUSSION... /ISSUED 0203 AM CST Fri Jan 05 2024/ ...Synopsis... Active mid-level flow will continue over the CONUS into D2/Saturday as the eastern US shortwave trough continues to approaches the Atlantic Coast. The accompanying surface low is forecast to intensify through the forecast period, bringing widespread precipitation the Mid Atlantic and Northeast States. At the same time, a second trough will approach the Pacific coast as mid-level flow intensifies over the southern third of the CONUS. Widespread precipitation is forecast to develop over the West while a cool air mass resides over the central US. Outside of locally breezy winds across parts of the far southern Plains, dry and windy conditions are not expected to overlap with areas of dry fuels. Fire-weather concerns are low. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1218 PM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... No changes to the ongoing forecast. ..Wendt.. 01/05/2024 .PREV DISCUSSION... /ISSUED 0203 AM CST Fri Jan 05 2024/ ...Synopsis... Active mid-level flow will continue over the CONUS into D2/Saturday as the eastern US shortwave trough continues to approaches the Atlantic Coast. The accompanying surface low is forecast to intensify through the forecast period, bringing widespread precipitation the Mid Atlantic and Northeast States. At the same time, a second trough will approach the Pacific coast as mid-level flow intensifies over the southern third of the CONUS. Widespread precipitation is forecast to develop over the West while a cool air mass resides over the central US. Outside of locally breezy winds across parts of the far southern Plains, dry and windy conditions are not expected to overlap with areas of dry fuels. Fire-weather concerns are low. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1218 PM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... No changes to the ongoing forecast. ..Wendt.. 01/05/2024 .PREV DISCUSSION... /ISSUED 0203 AM CST Fri Jan 05 2024/ ...Synopsis... Active mid-level flow will continue over the CONUS into D2/Saturday as the eastern US shortwave trough continues to approaches the Atlantic Coast. The accompanying surface low is forecast to intensify through the forecast period, bringing widespread precipitation the Mid Atlantic and Northeast States. At the same time, a second trough will approach the Pacific coast as mid-level flow intensifies over the southern third of the CONUS. Widespread precipitation is forecast to develop over the West while a cool air mass resides over the central US. Outside of locally breezy winds across parts of the far southern Plains, dry and windy conditions are not expected to overlap with areas of dry fuels. Fire-weather concerns are low. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

MD 0002 CONCERNING HEAVY SNOW FOR CENTRAL KANSAS
Mesoscale Discussion 0002 NWS Storm Prediction Center Norman OK 0947 AM CST Fri Jan 05 2024 Areas affected...Central Kansas Concerning...Heavy snow Valid 051547Z - 051845Z SUMMARY...Heavy snow with rates up to 1 inch per hour are expected through early afternoon. DISCUSSION...A band of heavy snow is lifting north across central Kansas this morning to the north of a surface low currently across northwest Oklahoma. This snow band is primarily triggered by warm-air advection centered around 850mb. A 25 to 30 knot low-level jet is currently present across northern Oklahoma and southeast Kansas, per RAP mesoanalysis. However, these winds are expected to weaken by mid afternoon as the 850mb height gradient relaxes across Oklahoma due to a deepening cyclone near the Gulf Coast. Therefore, expect a few more hours of moderate to heavy intensity snow before this band begins to weaken by early afternoon. ..Bentley.. 01/05/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...EAX...TOP...ICT... LAT...LON 37789795 38149802 38809687 38899564 38689504 38399481 38139496 38069572 37799658 37729718 37789795 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF THE FLORIDA PENINSULA... ...SUMMARY... Strong thunderstorms may impact parts of the Florida Peninsula Saturday, with a threat for isolated damaging wind gusts and a tornado or two. ...Synopsis... A mid/upper-level shortwave trough will move quickly northeastward from parts of the Southeast/TN Valley toward the Mid Atlantic by mid/late afternoon, and off of the southern New England coast by early Sunday morning. An attendant surface low will move from south GA toward the VA Tidewater by Saturday evening, as a trailing cold front moves through parts of the Carolinas/GA into the FL Peninsula. ...Florida... In conjunction with the ejecting shortwave trough, rather widespread and organized convection is expected over the Gulf of Mexico late Friday night into the beginning of the D2 forecast period Saturday morning, within a moderately unstable and favorably sheared environment. This convection will begin to affect portions of the FL Gulf Coast during the morning, though some weakening trend is expected as storms encounter a less unstable environment over the peninsula. While there will be some potential for pre-convective heating and moistening across south and east FL during the day, storms may struggle to maintain intensity across the peninsula due to weak midlevel lapse rates and the tendency for stronger large-scale ascent to depart the region in association with the ejecting shortwave trough. Favorable low-level and deep-layer shear will support the threat of a tornado or two and locally damaging gusts with any organized storm structures that can be sustained over coastal regions into the peninsula. With favorable wind profiles expected, but also concerns regarding instability and storm maintenance over the peninsula, a broad Marginal Risk has been maintained over much of the FL Peninsula. ...Eastern Carolinas... With the surface low expected to track northeastward toward the Tidewater vicinity, the effective warm sector will likely advance into eastern portions of the Carolinas. However, with antecedent cool/dry conditions over the region, increasing boundary-layer moisture will be accompanied by substantial cloudiness and limited potential for destabilization. At this time, potential for robust surface-based convection appears too limited for severe probabilities across the eastern Carolinas, but this potential will continue to be monitored. ..Dean.. 01/05/2024 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF THE FLORIDA PENINSULA... ...SUMMARY... Strong thunderstorms may impact parts of the Florida Peninsula Saturday, with a threat for isolated damaging wind gusts and a tornado or two. ...Synopsis... A mid/upper-level shortwave trough will move quickly northeastward from parts of the Southeast/TN Valley toward the Mid Atlantic by mid/late afternoon, and off of the southern New England coast by early Sunday morning. An attendant surface low will move from south GA toward the VA Tidewater by Saturday evening, as a trailing cold front moves through parts of the Carolinas/GA into the FL Peninsula. ...Florida... In conjunction with the ejecting shortwave trough, rather widespread and organized convection is expected over the Gulf of Mexico late Friday night into the beginning of the D2 forecast period Saturday morning, within a moderately unstable and favorably sheared environment. This convection will begin to affect portions of the FL Gulf Coast during the morning, though some weakening trend is expected as storms encounter a less unstable environment over the peninsula. While there will be some potential for pre-convective heating and moistening across south and east FL during the day, storms may struggle to maintain intensity across the peninsula due to weak midlevel lapse rates and the tendency for stronger large-scale ascent to depart the region in association with the ejecting shortwave trough. Favorable low-level and deep-layer shear will support the threat of a tornado or two and locally damaging gusts with any organized storm structures that can be sustained over coastal regions into the peninsula. With favorable wind profiles expected, but also concerns regarding instability and storm maintenance over the peninsula, a broad Marginal Risk has been maintained over much of the FL Peninsula. ...Eastern Carolinas... With the surface low expected to track northeastward toward the Tidewater vicinity, the effective warm sector will likely advance into eastern portions of the Carolinas. However, with antecedent cool/dry conditions over the region, increasing boundary-layer moisture will be accompanied by substantial cloudiness and limited potential for destabilization. At this time, potential for robust surface-based convection appears too limited for severe probabilities across the eastern Carolinas, but this potential will continue to be monitored. ..Dean.. 01/05/2024 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF THE FLORIDA PENINSULA... ...SUMMARY... Strong thunderstorms may impact parts of the Florida Peninsula Saturday, with a threat for isolated damaging wind gusts and a tornado or two. ...Synopsis... A mid/upper-level shortwave trough will move quickly northeastward from parts of the Southeast/TN Valley toward the Mid Atlantic by mid/late afternoon, and off of the southern New England coast by early Sunday morning. An attendant surface low will move from south GA toward the VA Tidewater by Saturday evening, as a trailing cold front moves through parts of the Carolinas/GA into the FL Peninsula. ...Florida... In conjunction with the ejecting shortwave trough, rather widespread and organized convection is expected over the Gulf of Mexico late Friday night into the beginning of the D2 forecast period Saturday morning, within a moderately unstable and favorably sheared environment. This convection will begin to affect portions of the FL Gulf Coast during the morning, though some weakening trend is expected as storms encounter a less unstable environment over the peninsula. While there will be some potential for pre-convective heating and moistening across south and east FL during the day, storms may struggle to maintain intensity across the peninsula due to weak midlevel lapse rates and the tendency for stronger large-scale ascent to depart the region in association with the ejecting shortwave trough. Favorable low-level and deep-layer shear will support the threat of a tornado or two and locally damaging gusts with any organized storm structures that can be sustained over coastal regions into the peninsula. With favorable wind profiles expected, but also concerns regarding instability and storm maintenance over the peninsula, a broad Marginal Risk has been maintained over much of the FL Peninsula. ...Eastern Carolinas... With the surface low expected to track northeastward toward the Tidewater vicinity, the effective warm sector will likely advance into eastern portions of the Carolinas. However, with antecedent cool/dry conditions over the region, increasing boundary-layer moisture will be accompanied by substantial cloudiness and limited potential for destabilization. At this time, potential for robust surface-based convection appears too limited for severe probabilities across the eastern Carolinas, but this potential will continue to be monitored. ..Dean.. 01/05/2024 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF THE FLORIDA PENINSULA... ...SUMMARY... Strong thunderstorms may impact parts of the Florida Peninsula Saturday, with a threat for isolated damaging wind gusts and a tornado or two. ...Synopsis... A mid/upper-level shortwave trough will move quickly northeastward from parts of the Southeast/TN Valley toward the Mid Atlantic by mid/late afternoon, and off of the southern New England coast by early Sunday morning. An attendant surface low will move from south GA toward the VA Tidewater by Saturday evening, as a trailing cold front moves through parts of the Carolinas/GA into the FL Peninsula. ...Florida... In conjunction with the ejecting shortwave trough, rather widespread and organized convection is expected over the Gulf of Mexico late Friday night into the beginning of the D2 forecast period Saturday morning, within a moderately unstable and favorably sheared environment. This convection will begin to affect portions of the FL Gulf Coast during the morning, though some weakening trend is expected as storms encounter a less unstable environment over the peninsula. While there will be some potential for pre-convective heating and moistening across south and east FL during the day, storms may struggle to maintain intensity across the peninsula due to weak midlevel lapse rates and the tendency for stronger large-scale ascent to depart the region in association with the ejecting shortwave trough. Favorable low-level and deep-layer shear will support the threat of a tornado or two and locally damaging gusts with any organized storm structures that can be sustained over coastal regions into the peninsula. With favorable wind profiles expected, but also concerns regarding instability and storm maintenance over the peninsula, a broad Marginal Risk has been maintained over much of the FL Peninsula. ...Eastern Carolinas... With the surface low expected to track northeastward toward the Tidewater vicinity, the effective warm sector will likely advance into eastern portions of the Carolinas. However, with antecedent cool/dry conditions over the region, increasing boundary-layer moisture will be accompanied by substantial cloudiness and limited potential for destabilization. At this time, potential for robust surface-based convection appears too limited for severe probabilities across the eastern Carolinas, but this potential will continue to be monitored. ..Dean.. 01/05/2024 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF THE FLORIDA PENINSULA... ...SUMMARY... Strong thunderstorms may impact parts of the Florida Peninsula Saturday, with a threat for isolated damaging wind gusts and a tornado or two. ...Synopsis... A mid/upper-level shortwave trough will move quickly northeastward from parts of the Southeast/TN Valley toward the Mid Atlantic by mid/late afternoon, and off of the southern New England coast by early Sunday morning. An attendant surface low will move from south GA toward the VA Tidewater by Saturday evening, as a trailing cold front moves through parts of the Carolinas/GA into the FL Peninsula. ...Florida... In conjunction with the ejecting shortwave trough, rather widespread and organized convection is expected over the Gulf of Mexico late Friday night into the beginning of the D2 forecast period Saturday morning, within a moderately unstable and favorably sheared environment. This convection will begin to affect portions of the FL Gulf Coast during the morning, though some weakening trend is expected as storms encounter a less unstable environment over the peninsula. While there will be some potential for pre-convective heating and moistening across south and east FL during the day, storms may struggle to maintain intensity across the peninsula due to weak midlevel lapse rates and the tendency for stronger large-scale ascent to depart the region in association with the ejecting shortwave trough. Favorable low-level and deep-layer shear will support the threat of a tornado or two and locally damaging gusts with any organized storm structures that can be sustained over coastal regions into the peninsula. With favorable wind profiles expected, but also concerns regarding instability and storm maintenance over the peninsula, a broad Marginal Risk has been maintained over much of the FL Peninsula. ...Eastern Carolinas... With the surface low expected to track northeastward toward the Tidewater vicinity, the effective warm sector will likely advance into eastern portions of the Carolinas. However, with antecedent cool/dry conditions over the region, increasing boundary-layer moisture will be accompanied by substantial cloudiness and limited potential for destabilization. At this time, potential for robust surface-based convection appears too limited for severe probabilities across the eastern Carolinas, but this potential will continue to be monitored. ..Dean.. 01/05/2024 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF THE FLORIDA PENINSULA... ...SUMMARY... Strong thunderstorms may impact parts of the Florida Peninsula Saturday, with a threat for isolated damaging wind gusts and a tornado or two. ...Synopsis... A mid/upper-level shortwave trough will move quickly northeastward from parts of the Southeast/TN Valley toward the Mid Atlantic by mid/late afternoon, and off of the southern New England coast by early Sunday morning. An attendant surface low will move from south GA toward the VA Tidewater by Saturday evening, as a trailing cold front moves through parts of the Carolinas/GA into the FL Peninsula. ...Florida... In conjunction with the ejecting shortwave trough, rather widespread and organized convection is expected over the Gulf of Mexico late Friday night into the beginning of the D2 forecast period Saturday morning, within a moderately unstable and favorably sheared environment. This convection will begin to affect portions of the FL Gulf Coast during the morning, though some weakening trend is expected as storms encounter a less unstable environment over the peninsula. While there will be some potential for pre-convective heating and moistening across south and east FL during the day, storms may struggle to maintain intensity across the peninsula due to weak midlevel lapse rates and the tendency for stronger large-scale ascent to depart the region in association with the ejecting shortwave trough. Favorable low-level and deep-layer shear will support the threat of a tornado or two and locally damaging gusts with any organized storm structures that can be sustained over coastal regions into the peninsula. With favorable wind profiles expected, but also concerns regarding instability and storm maintenance over the peninsula, a broad Marginal Risk has been maintained over much of the FL Peninsula. ...Eastern Carolinas... With the surface low expected to track northeastward toward the Tidewater vicinity, the effective warm sector will likely advance into eastern portions of the Carolinas. However, with antecedent cool/dry conditions over the region, increasing boundary-layer moisture will be accompanied by substantial cloudiness and limited potential for destabilization. At this time, potential for robust surface-based convection appears too limited for severe probabilities across the eastern Carolinas, but this potential will continue to be monitored. ..Dean.. 01/05/2024 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CST Fri Jan 05 2024 Valid 061200Z - 071200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS MUCH OF THE FLORIDA PENINSULA... ...SUMMARY... Strong thunderstorms may impact parts of the Florida Peninsula Saturday, with a threat for isolated damaging wind gusts and a tornado or two. ...Synopsis... A mid/upper-level shortwave trough will move quickly northeastward from parts of the Southeast/TN Valley toward the Mid Atlantic by mid/late afternoon, and off of the southern New England coast by early Sunday morning. An attendant surface low will move from south GA toward the VA Tidewater by Saturday evening, as a trailing cold front moves through parts of the Carolinas/GA into the FL Peninsula. ...Florida... In conjunction with the ejecting shortwave trough, rather widespread and organized convection is expected over the Gulf of Mexico late Friday night into the beginning of the D2 forecast period Saturday morning, within a moderately unstable and favorably sheared environment. This convection will begin to affect portions of the FL Gulf Coast during the morning, though some weakening trend is expected as storms encounter a less unstable environment over the peninsula. While there will be some potential for pre-convective heating and moistening across south and east FL during the day, storms may struggle to maintain intensity across the peninsula due to weak midlevel lapse rates and the tendency for stronger large-scale ascent to depart the region in association with the ejecting shortwave trough. Favorable low-level and deep-layer shear will support the threat of a tornado or two and locally damaging gusts with any organized storm structures that can be sustained over coastal regions into the peninsula. With favorable wind profiles expected, but also concerns regarding instability and storm maintenance over the peninsula, a broad Marginal Risk has been maintained over much of the FL Peninsula. ...Eastern Carolinas... With the surface low expected to track northeastward toward the Tidewater vicinity, the effective warm sector will likely advance into eastern portions of the Carolinas. However, with antecedent cool/dry conditions over the region, increasing boundary-layer moisture will be accompanied by substantial cloudiness and limited potential for destabilization. At this time, potential for robust surface-based convection appears too limited for severe probabilities across the eastern Carolinas, but this potential will continue to be monitored. ..Dean.. 01/05/2024 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1026 AM CST Fri Jan 05 2024 Valid 051630Z - 061200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT ALONG THE IMMEDIATE GULF COAST... ...SUMMARY... Isolated severe thunderstorms may occur along the Gulf Coast today through tonight, including coastal areas of Louisiana, Mississippi, Alabama, and the Florida Panhandle. ...Gulf Coast Region... Morning water vapory imagery shows a strong upper trough progressing eastward across TX/OK, with a 70-80 knot mid-level jet extending across south TX into the western Gulf of Mexico. A surface low associated with this upper trough and jet is positioned just south of the Upper Texas coast, where a line of strong storms extends from the coast southward into the Gulf. Low-level trajectories have been slow to back to southerly, resulting in a limited northward transport of rich moisture/instability. Onshore thunderstorm activity is in an environment of surface dewpoints only in the 50s, and should remain elevated in nature through much of the afternoon. Visible satellite imagery shows multiple small cellular convective elements well offshore, tracking northeastward. With continued daytime heating, a few of these cells may organized/intensify and drift toward southern LA late this afternoon and evening. Shear profiles would pose a risk of supercells, but it remains unclear how far inland the risk of surface-based convection will spread. Any storms in this regime that are surface-based would represent a risk of gusty/damaging wind gusts or a tornado. A similar threat will persist overnight as the convective cluster moves eastward along the MS/AL/FL coast. ..Hart/Bentley.. 01/05/2024 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1026 AM CST Fri Jan 05 2024 Valid 051630Z - 061200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT ALONG THE IMMEDIATE GULF COAST... ...SUMMARY... Isolated severe thunderstorms may occur along the Gulf Coast today through tonight, including coastal areas of Louisiana, Mississippi, Alabama, and the Florida Panhandle. ...Gulf Coast Region... Morning water vapory imagery shows a strong upper trough progressing eastward across TX/OK, with a 70-80 knot mid-level jet extending across south TX into the western Gulf of Mexico. A surface low associated with this upper trough and jet is positioned just south of the Upper Texas coast, where a line of strong storms extends from the coast southward into the Gulf. Low-level trajectories have been slow to back to southerly, resulting in a limited northward transport of rich moisture/instability. Onshore thunderstorm activity is in an environment of surface dewpoints only in the 50s, and should remain elevated in nature through much of the afternoon. Visible satellite imagery shows multiple small cellular convective elements well offshore, tracking northeastward. With continued daytime heating, a few of these cells may organized/intensify and drift toward southern LA late this afternoon and evening. Shear profiles would pose a risk of supercells, but it remains unclear how far inland the risk of surface-based convection will spread. Any storms in this regime that are surface-based would represent a risk of gusty/damaging wind gusts or a tornado. A similar threat will persist overnight as the convective cluster moves eastward along the MS/AL/FL coast. ..Hart/Bentley.. 01/05/2024 Read more

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1026 AM CST Fri Jan 05 2024 Valid 051630Z - 061200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT ALONG THE IMMEDIATE GULF COAST... ...SUMMARY... Isolated severe thunderstorms may occur along the Gulf Coast today through tonight, including coastal areas of Louisiana, Mississippi, Alabama, and the Florida Panhandle. ...Gulf Coast Region... Morning water vapory imagery shows a strong upper trough progressing eastward across TX/OK, with a 70-80 knot mid-level jet extending across south TX into the western Gulf of Mexico. A surface low associated with this upper trough and jet is positioned just south of the Upper Texas coast, where a line of strong storms extends from the coast southward into the Gulf. Low-level trajectories have been slow to back to southerly, resulting in a limited northward transport of rich moisture/instability. Onshore thunderstorm activity is in an environment of surface dewpoints only in the 50s, and should remain elevated in nature through much of the afternoon. Visible satellite imagery shows multiple small cellular convective elements well offshore, tracking northeastward. With continued daytime heating, a few of these cells may organized/intensify and drift toward southern LA late this afternoon and evening. Shear profiles would pose a risk of supercells, but it remains unclear how far inland the risk of surface-based convection will spread. Any storms in this regime that are surface-based would represent a risk of gusty/damaging wind gusts or a tornado. A similar threat will persist overnight as the convective cluster moves eastward along the MS/AL/FL coast. ..Hart/Bentley.. 01/05/2024 Read more