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SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0658 AM CST Thu Jan 09 2025 Valid 091300Z - 101200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast through tonight. ...Discussion... A low-latitude positive-tilt upper trough over the Four Corners and northwest Mexico will slowly transition eastward toward the southern High Plains through tonight. A related strengthening of deep-layer southwesterly winds will occur across the southern Plains, atop a cool and stable air mass at the surface. Warm advection and elevated moisture transport will be maximized across broad parts of central/southern to east Texas today, and into the Lower Mississippi Valley tonight. Weak elevated buoyancy will support occasional thunderstorms. It is unlikely that instability will be strong enough for any hail risk given poor lapse rates aloft. ..Guyer/Bentley.. 01/09/2025 Read more

SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0658 AM CST Thu Jan 09 2025 Valid 091300Z - 101200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast through tonight. ...Discussion... A low-latitude positive-tilt upper trough over the Four Corners and northwest Mexico will slowly transition eastward toward the southern High Plains through tonight. A related strengthening of deep-layer southwesterly winds will occur across the southern Plains, atop a cool and stable air mass at the surface. Warm advection and elevated moisture transport will be maximized across broad parts of central/southern to east Texas today, and into the Lower Mississippi Valley tonight. Weak elevated buoyancy will support occasional thunderstorms. It is unlikely that instability will be strong enough for any hail risk given poor lapse rates aloft. ..Guyer/Bentley.. 01/09/2025 Read more

SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0658 AM CST Thu Jan 09 2025 Valid 091300Z - 101200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast through tonight. ...Discussion... A low-latitude positive-tilt upper trough over the Four Corners and northwest Mexico will slowly transition eastward toward the southern High Plains through tonight. A related strengthening of deep-layer southwesterly winds will occur across the southern Plains, atop a cool and stable air mass at the surface. Warm advection and elevated moisture transport will be maximized across broad parts of central/southern to east Texas today, and into the Lower Mississippi Valley tonight. Weak elevated buoyancy will support occasional thunderstorms. It is unlikely that instability will be strong enough for any hail risk given poor lapse rates aloft. ..Guyer/Bentley.. 01/09/2025 Read more

Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0340 AM CST Thu Jan 09 2025 Valid 121200Z - 171200Z ...DISCUSSION... A northwest mid-level flow pattern is forecast to remain in place over the central U.S. throughout the Day 4 to 8 period, as a series of shortwave troughs move southeastward through the flow. The northwesterly flow will help to drive multiple fronts southward into the central and eastern U.S, which will keep a relatively cold and dry airmass in place. For this reason, conditions are not expected to be favorable for thunderstorm development across the continental U.S. through the middle of next week. Read more

Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0340 AM CST Thu Jan 09 2025 Valid 121200Z - 171200Z ...DISCUSSION... A northwest mid-level flow pattern is forecast to remain in place over the central U.S. throughout the Day 4 to 8 period, as a series of shortwave troughs move southeastward through the flow. The northwesterly flow will help to drive multiple fronts southward into the central and eastern U.S, which will keep a relatively cold and dry airmass in place. For this reason, conditions are not expected to be favorable for thunderstorm development across the continental U.S. through the middle of next week. Read more

Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0340 AM CST Thu Jan 09 2025 Valid 121200Z - 171200Z ...DISCUSSION... A northwest mid-level flow pattern is forecast to remain in place over the central U.S. throughout the Day 4 to 8 period, as a series of shortwave troughs move southeastward through the flow. The northwesterly flow will help to drive multiple fronts southward into the central and eastern U.S, which will keep a relatively cold and dry airmass in place. For this reason, conditions are not expected to be favorable for thunderstorm development across the continental U.S. through the middle of next week. Read more

Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0340 AM CST Thu Jan 09 2025 Valid 121200Z - 171200Z ...DISCUSSION... A northwest mid-level flow pattern is forecast to remain in place over the central U.S. throughout the Day 4 to 8 period, as a series of shortwave troughs move southeastward through the flow. The northwesterly flow will help to drive multiple fronts southward into the central and eastern U.S, which will keep a relatively cold and dry airmass in place. For this reason, conditions are not expected to be favorable for thunderstorm development across the continental U.S. through the middle of next week. Read more

Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0340 AM CST Thu Jan 09 2025 Valid 121200Z - 171200Z ...DISCUSSION... A northwest mid-level flow pattern is forecast to remain in place over the central U.S. throughout the Day 4 to 8 period, as a series of shortwave troughs move southeastward through the flow. The northwesterly flow will help to drive multiple fronts southward into the central and eastern U.S, which will keep a relatively cold and dry airmass in place. For this reason, conditions are not expected to be favorable for thunderstorm development across the continental U.S. through the middle of next week. Read more

Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0340 AM CST Thu Jan 09 2025 Valid 121200Z - 171200Z ...DISCUSSION... A northwest mid-level flow pattern is forecast to remain in place over the central U.S. throughout the Day 4 to 8 period, as a series of shortwave troughs move southeastward through the flow. The northwesterly flow will help to drive multiple fronts southward into the central and eastern U.S, which will keep a relatively cold and dry airmass in place. For this reason, conditions are not expected to be favorable for thunderstorm development across the continental U.S. through the middle of next week. Read more

Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0340 AM CST Thu Jan 09 2025 Valid 121200Z - 171200Z ...DISCUSSION... A northwest mid-level flow pattern is forecast to remain in place over the central U.S. throughout the Day 4 to 8 period, as a series of shortwave troughs move southeastward through the flow. The northwesterly flow will help to drive multiple fronts southward into the central and eastern U.S, which will keep a relatively cold and dry airmass in place. For this reason, conditions are not expected to be favorable for thunderstorm development across the continental U.S. through the middle of next week. Read more

SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0207 AM CST Thu Jan 09 2025 Valid 111200Z - 121200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected across the continental U.S. on Saturday and Saturday night. ...DISCUSSION... On Saturday at mid-levels, a trough will move eastward to the Atlantic Seaboard as another trough moves through the Four Corners region. At the surface, a large area of high pressure will remain over the Southeast, as another strong cold front moves southward through the central states. A relatively cold and dry airmass will remain over much of the continental U.S., making conditions unfavorable for thunderstorms Saturday and Saturday night. ..Broyles.. 01/09/2025 Read more

SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0207 AM CST Thu Jan 09 2025 Valid 111200Z - 121200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected across the continental U.S. on Saturday and Saturday night. ...DISCUSSION... On Saturday at mid-levels, a trough will move eastward to the Atlantic Seaboard as another trough moves through the Four Corners region. At the surface, a large area of high pressure will remain over the Southeast, as another strong cold front moves southward through the central states. A relatively cold and dry airmass will remain over much of the continental U.S., making conditions unfavorable for thunderstorms Saturday and Saturday night. ..Broyles.. 01/09/2025 Read more

SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0207 AM CST Thu Jan 09 2025 Valid 111200Z - 121200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected across the continental U.S. on Saturday and Saturday night. ...DISCUSSION... On Saturday at mid-levels, a trough will move eastward to the Atlantic Seaboard as another trough moves through the Four Corners region. At the surface, a large area of high pressure will remain over the Southeast, as another strong cold front moves southward through the central states. A relatively cold and dry airmass will remain over much of the continental U.S., making conditions unfavorable for thunderstorms Saturday and Saturday night. ..Broyles.. 01/09/2025 Read more

SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0207 AM CST Thu Jan 09 2025 Valid 111200Z - 121200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected across the continental U.S. on Saturday and Saturday night. ...DISCUSSION... On Saturday at mid-levels, a trough will move eastward to the Atlantic Seaboard as another trough moves through the Four Corners region. At the surface, a large area of high pressure will remain over the Southeast, as another strong cold front moves southward through the central states. A relatively cold and dry airmass will remain over much of the continental U.S., making conditions unfavorable for thunderstorms Saturday and Saturday night. ..Broyles.. 01/09/2025 Read more

SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0207 AM CST Thu Jan 09 2025 Valid 111200Z - 121200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected across the continental U.S. on Saturday and Saturday night. ...DISCUSSION... On Saturday at mid-levels, a trough will move eastward to the Atlantic Seaboard as another trough moves through the Four Corners region. At the surface, a large area of high pressure will remain over the Southeast, as another strong cold front moves southward through the central states. A relatively cold and dry airmass will remain over much of the continental U.S., making conditions unfavorable for thunderstorms Saturday and Saturday night. ..Broyles.. 01/09/2025 Read more

SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0207 AM CST Thu Jan 09 2025 Valid 111200Z - 121200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected across the continental U.S. on Saturday and Saturday night. ...DISCUSSION... On Saturday at mid-levels, a trough will move eastward to the Atlantic Seaboard as another trough moves through the Four Corners region. At the surface, a large area of high pressure will remain over the Southeast, as another strong cold front moves southward through the central states. A relatively cold and dry airmass will remain over much of the continental U.S., making conditions unfavorable for thunderstorms Saturday and Saturday night. ..Broyles.. 01/09/2025 Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0203 AM CST Thu Jan 09 2025 Valid 101200Z - 111200Z ...Synopsis... The upper-level trough in the Northwest will shift south and east on Friday. This feature is expected to lose amplitude as an upstream trough moves into the Northwest. As a result, surface high pressure in the Great Basin/Southwest should lose intensity rather quickly after the early morning hours. ...Southern California... The offshore pressure gradient will have been in the process of gradually weakening for several hours prior to Friday morning. The weakening trend will continue, especially during the afternoon. Upper-level wind support will also quickly dissipate after the early morning as the trough pushes farther east and upper-level ridging increases in the region. RH will likely remain low through the day. 5-20% RH will be fairly widespread by the afternoon. Winds will generally reach 15-25 mph. Some locally higher speeds are possible within the terrain. Given the overall large-scale trends and high-resolution ensemble guidance, critical fire weather conditions are expected to occur locally and primarily tied to terrain features. ..Wendt.. 01/09/2025 ...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 0203 AM CST Thu Jan 09 2025 Valid 101200Z - 111200Z ...Synopsis... The upper-level trough in the Northwest will shift south and east on Friday. This feature is expected to lose amplitude as an upstream trough moves into the Northwest. As a result, surface high pressure in the Great Basin/Southwest should lose intensity rather quickly after the early morning hours. ...Southern California... The offshore pressure gradient will have been in the process of gradually weakening for several hours prior to Friday morning. The weakening trend will continue, especially during the afternoon. Upper-level wind support will also quickly dissipate after the early morning as the trough pushes farther east and upper-level ridging increases in the region. RH will likely remain low through the day. 5-20% RH will be fairly widespread by the afternoon. Winds will generally reach 15-25 mph. Some locally higher speeds are possible within the terrain. Given the overall large-scale trends and high-resolution ensemble guidance, critical fire weather conditions are expected to occur locally and primarily tied to terrain features. ..Wendt.. 01/09/2025 ...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 0203 AM CST Thu Jan 09 2025 Valid 101200Z - 111200Z ...Synopsis... The upper-level trough in the Northwest will shift south and east on Friday. This feature is expected to lose amplitude as an upstream trough moves into the Northwest. As a result, surface high pressure in the Great Basin/Southwest should lose intensity rather quickly after the early morning hours. ...Southern California... The offshore pressure gradient will have been in the process of gradually weakening for several hours prior to Friday morning. The weakening trend will continue, especially during the afternoon. Upper-level wind support will also quickly dissipate after the early morning as the trough pushes farther east and upper-level ridging increases in the region. RH will likely remain low through the day. 5-20% RH will be fairly widespread by the afternoon. Winds will generally reach 15-25 mph. Some locally higher speeds are possible within the terrain. Given the overall large-scale trends and high-resolution ensemble guidance, critical fire weather conditions are expected to occur locally and primarily tied to terrain features. ..Wendt.. 01/09/2025 ...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 0203 AM CST Thu Jan 09 2025 Valid 101200Z - 111200Z ...Synopsis... The upper-level trough in the Northwest will shift south and east on Friday. This feature is expected to lose amplitude as an upstream trough moves into the Northwest. As a result, surface high pressure in the Great Basin/Southwest should lose intensity rather quickly after the early morning hours. ...Southern California... The offshore pressure gradient will have been in the process of gradually weakening for several hours prior to Friday morning. The weakening trend will continue, especially during the afternoon. Upper-level wind support will also quickly dissipate after the early morning as the trough pushes farther east and upper-level ridging increases in the region. RH will likely remain low through the day. 5-20% RH will be fairly widespread by the afternoon. Winds will generally reach 15-25 mph. Some locally higher speeds are possible within the terrain. Given the overall large-scale trends and high-resolution ensemble guidance, critical fire weather conditions are expected to occur locally and primarily tied to terrain features. ..Wendt.. 01/09/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more