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SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1143 PM CST Tue Dec 19 2023 Valid 201200Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms will be possible across parts of southern/central California and over portions of the Southwest. The severe-thunderstorm threat appears low. ...Synopsis... A deep-layer cyclone is forecast to move slowly southward off of the CA coast through the day. Downstream of this cyclone, a low-amplitude midlevel shortwave trough is forecast to move across parts of the Southwest and southern Rockies. An expansive surface ridge will cover much of the central/eastern CONUS, which should generally preclude thunderstorm development east of the Rockies. Midlevel moistening in advance of the Southwest shortwave will support elevated convection and perhaps sporadic lightning flashes across parts of AZ/NM. Somewhat more vigorous convection and greater thunderstorm coverage will be possible across parts of CA, in association with the offshore low. ...California... Deep southerly flow to the east of the offshore low will maintain modest low/midlevel moisture across near-coastal areas of southern/central CA. While the low will remain offshore through the period, a band of convection may move onshore during the day and possibly persist into the evening, in association with gradual cooling aloft and favorably difluent upper-level flow. Inland destabilization will likely remain quite limited, but increasing vertical shear may support modestly organized convection at times. A couple strong storms will be possible as stronger offshore convection approaches the coast, but instability currently appears too weak to support an organized severe-thunderstorm threat. ..Dean/Squitieri.. 12/20/2023 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1143 PM CST Tue Dec 19 2023 Valid 201200Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms will be possible across parts of southern/central California and over portions of the Southwest. The severe-thunderstorm threat appears low. ...Synopsis... A deep-layer cyclone is forecast to move slowly southward off of the CA coast through the day. Downstream of this cyclone, a low-amplitude midlevel shortwave trough is forecast to move across parts of the Southwest and southern Rockies. An expansive surface ridge will cover much of the central/eastern CONUS, which should generally preclude thunderstorm development east of the Rockies. Midlevel moistening in advance of the Southwest shortwave will support elevated convection and perhaps sporadic lightning flashes across parts of AZ/NM. Somewhat more vigorous convection and greater thunderstorm coverage will be possible across parts of CA, in association with the offshore low. ...California... Deep southerly flow to the east of the offshore low will maintain modest low/midlevel moisture across near-coastal areas of southern/central CA. While the low will remain offshore through the period, a band of convection may move onshore during the day and possibly persist into the evening, in association with gradual cooling aloft and favorably difluent upper-level flow. Inland destabilization will likely remain quite limited, but increasing vertical shear may support modestly organized convection at times. A couple strong storms will be possible as stronger offshore convection approaches the coast, but instability currently appears too weak to support an organized severe-thunderstorm threat. ..Dean/Squitieri.. 12/20/2023 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0645 PM CST Tue Dec 19 2023 Valid 200100Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected for the remainder of tonight. ...Synopsis... Multiple bands of generally weak convection will persist into this evening across parts of central and northern CA, to the east of a deep-layer cyclone moving southward off the northern CA coast. Weak instability may continue to support sporadic lightning flashes early this evening, before a gradual weakening trend later tonight with the onset of nocturnal cooling/stabilization. Elsewhere, generally dry and stable conditions will limit thunderstorm potential into Wednesday morning. ..Dean.. 12/20/2023 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0645 PM CST Tue Dec 19 2023 Valid 200100Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected for the remainder of tonight. ...Synopsis... Multiple bands of generally weak convection will persist into this evening across parts of central and northern CA, to the east of a deep-layer cyclone moving southward off the northern CA coast. Weak instability may continue to support sporadic lightning flashes early this evening, before a gradual weakening trend later tonight with the onset of nocturnal cooling/stabilization. Elsewhere, generally dry and stable conditions will limit thunderstorm potential into Wednesday morning. ..Dean.. 12/20/2023 Read more

No Mesoscale Discussions are in effect as of Tue Dec 19 23:41:02 UTC 2023.

No watches are valid as of Tue Dec 19 23:41:02 UTC 2023.

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0330 PM CST Tue Dec 19 2023 Valid 211200Z - 271200Z An active mid-level flow regime is expected to continue across the CONUS through the extended forecast period. Prominent Pacific troughing is forecast to move inland and continue eastward into the central US late this week and into the weekend. Transient ridging over the eastern and central US will gradually shift eastward as stronger westerly flow develops. Occasional dry offshore flow is possible over parts of the Southeast into the weekend, but winds are expected to remain light. Western US troughing will continue to amplify through the weekend supporting southerly return flow and widespread precipitation over the western and central CONUS. The flow pattern will remain highly amplified into next week as a second Pacific trough approaches the West Coast. As the western troughing shifts eastward, cool and unsettled weather is expected over much of the US through the end of the forecast period. With cool to mild temperatures and widespread precipitation expected over much of the country, significant fire-weather conditions appear unlikely through the next 7 days. ..Lyons.. 12/19/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0330 PM CST Tue Dec 19 2023 Valid 211200Z - 271200Z An active mid-level flow regime is expected to continue across the CONUS through the extended forecast period. Prominent Pacific troughing is forecast to move inland and continue eastward into the central US late this week and into the weekend. Transient ridging over the eastern and central US will gradually shift eastward as stronger westerly flow develops. Occasional dry offshore flow is possible over parts of the Southeast into the weekend, but winds are expected to remain light. Western US troughing will continue to amplify through the weekend supporting southerly return flow and widespread precipitation over the western and central CONUS. The flow pattern will remain highly amplified into next week as a second Pacific trough approaches the West Coast. As the western troughing shifts eastward, cool and unsettled weather is expected over much of the US through the end of the forecast period. With cool to mild temperatures and widespread precipitation expected over much of the country, significant fire-weather conditions appear unlikely through the next 7 days. ..Lyons.. 12/19/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0330 PM CST Tue Dec 19 2023 Valid 211200Z - 271200Z An active mid-level flow regime is expected to continue across the CONUS through the extended forecast period. Prominent Pacific troughing is forecast to move inland and continue eastward into the central US late this week and into the weekend. Transient ridging over the eastern and central US will gradually shift eastward as stronger westerly flow develops. Occasional dry offshore flow is possible over parts of the Southeast into the weekend, but winds are expected to remain light. Western US troughing will continue to amplify through the weekend supporting southerly return flow and widespread precipitation over the western and central CONUS. The flow pattern will remain highly amplified into next week as a second Pacific trough approaches the West Coast. As the western troughing shifts eastward, cool and unsettled weather is expected over much of the US through the end of the forecast period. With cool to mild temperatures and widespread precipitation expected over much of the country, significant fire-weather conditions appear unlikely through the next 7 days. ..Lyons.. 12/19/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0330 PM CST Tue Dec 19 2023 Valid 211200Z - 271200Z An active mid-level flow regime is expected to continue across the CONUS through the extended forecast period. Prominent Pacific troughing is forecast to move inland and continue eastward into the central US late this week and into the weekend. Transient ridging over the eastern and central US will gradually shift eastward as stronger westerly flow develops. Occasional dry offshore flow is possible over parts of the Southeast into the weekend, but winds are expected to remain light. Western US troughing will continue to amplify through the weekend supporting southerly return flow and widespread precipitation over the western and central CONUS. The flow pattern will remain highly amplified into next week as a second Pacific trough approaches the West Coast. As the western troughing shifts eastward, cool and unsettled weather is expected over much of the US through the end of the forecast period. With cool to mild temperatures and widespread precipitation expected over much of the country, significant fire-weather conditions appear unlikely through the next 7 days. ..Lyons.. 12/19/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0155 PM CST Tue Dec 19 2023 Valid 192000Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few thunderstorms remain possible today across parts of central and northern California. ...20Z Update... No changes have been made to the prior forecast. ..Gleason.. 12/19/2023 .PREV DISCUSSION... /ISSUED 1023 AM CST Tue Dec 19 2023/ ...Discussion... Broad/low-amplitude ridging aloft will prevail across most of the U.S. today, in the wake of a trough shifting eastward across the Mid-Atlantic Region and New England. In the West, an eastern Pacific low will continue shifting southeastward, with only a glancing influence across the West Coast states. However, this glancing influence will be enough to keep mid-levels relatively cool, and thus maintain very weak instability across this region. As such, sporadic lightning strikes will remain possible -- mainly across portions of northern and central California through tonight. Elsewhere, with the eastern U.S. surface cold front already offshore, and cool/stable high pressure prevailing east of the Rockies, thunderstorms are not expected. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0155 PM CST Tue Dec 19 2023 Valid 192000Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few thunderstorms remain possible today across parts of central and northern California. ...20Z Update... No changes have been made to the prior forecast. ..Gleason.. 12/19/2023 .PREV DISCUSSION... /ISSUED 1023 AM CST Tue Dec 19 2023/ ...Discussion... Broad/low-amplitude ridging aloft will prevail across most of the U.S. today, in the wake of a trough shifting eastward across the Mid-Atlantic Region and New England. In the West, an eastern Pacific low will continue shifting southeastward, with only a glancing influence across the West Coast states. However, this glancing influence will be enough to keep mid-levels relatively cool, and thus maintain very weak instability across this region. As such, sporadic lightning strikes will remain possible -- mainly across portions of northern and central California through tonight. Elsewhere, with the eastern U.S. surface cold front already offshore, and cool/stable high pressure prevailing east of the Rockies, thunderstorms are not expected. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0155 PM CST Tue Dec 19 2023 Valid 192000Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few thunderstorms remain possible today across parts of central and northern California. ...20Z Update... No changes have been made to the prior forecast. ..Gleason.. 12/19/2023 .PREV DISCUSSION... /ISSUED 1023 AM CST Tue Dec 19 2023/ ...Discussion... Broad/low-amplitude ridging aloft will prevail across most of the U.S. today, in the wake of a trough shifting eastward across the Mid-Atlantic Region and New England. In the West, an eastern Pacific low will continue shifting southeastward, with only a glancing influence across the West Coast states. However, this glancing influence will be enough to keep mid-levels relatively cool, and thus maintain very weak instability across this region. As such, sporadic lightning strikes will remain possible -- mainly across portions of northern and central California through tonight. Elsewhere, with the eastern U.S. surface cold front already offshore, and cool/stable high pressure prevailing east of the Rockies, thunderstorms are not expected. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0155 PM CST Tue Dec 19 2023 Valid 192000Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few thunderstorms remain possible today across parts of central and northern California. ...20Z Update... No changes have been made to the prior forecast. ..Gleason.. 12/19/2023 .PREV DISCUSSION... /ISSUED 1023 AM CST Tue Dec 19 2023/ ...Discussion... Broad/low-amplitude ridging aloft will prevail across most of the U.S. today, in the wake of a trough shifting eastward across the Mid-Atlantic Region and New England. In the West, an eastern Pacific low will continue shifting southeastward, with only a glancing influence across the West Coast states. However, this glancing influence will be enough to keep mid-levels relatively cool, and thus maintain very weak instability across this region. As such, sporadic lightning strikes will remain possible -- mainly across portions of northern and central California through tonight. Elsewhere, with the eastern U.S. surface cold front already offshore, and cool/stable high pressure prevailing east of the Rockies, thunderstorms are not expected. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0155 PM CST Tue Dec 19 2023 Valid 192000Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few thunderstorms remain possible today across parts of central and northern California. ...20Z Update... No changes have been made to the prior forecast. ..Gleason.. 12/19/2023 .PREV DISCUSSION... /ISSUED 1023 AM CST Tue Dec 19 2023/ ...Discussion... Broad/low-amplitude ridging aloft will prevail across most of the U.S. today, in the wake of a trough shifting eastward across the Mid-Atlantic Region and New England. In the West, an eastern Pacific low will continue shifting southeastward, with only a glancing influence across the West Coast states. However, this glancing influence will be enough to keep mid-levels relatively cool, and thus maintain very weak instability across this region. As such, sporadic lightning strikes will remain possible -- mainly across portions of northern and central California through tonight. Elsewhere, with the eastern U.S. surface cold front already offshore, and cool/stable high pressure prevailing east of the Rockies, thunderstorms are not expected. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0155 PM CST Tue Dec 19 2023 Valid 192000Z - 201200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few thunderstorms remain possible today across parts of central and northern California. ...20Z Update... No changes have been made to the prior forecast. ..Gleason.. 12/19/2023 .PREV DISCUSSION... /ISSUED 1023 AM CST Tue Dec 19 2023/ ...Discussion... Broad/low-amplitude ridging aloft will prevail across most of the U.S. today, in the wake of a trough shifting eastward across the Mid-Atlantic Region and New England. In the West, an eastern Pacific low will continue shifting southeastward, with only a glancing influence across the West Coast states. However, this glancing influence will be enough to keep mid-levels relatively cool, and thus maintain very weak instability across this region. As such, sporadic lightning strikes will remain possible -- mainly across portions of northern and central California through tonight. Elsewhere, with the eastern U.S. surface cold front already offshore, and cool/stable high pressure prevailing east of the Rockies, thunderstorms are not expected. Read more

WW 0999 Status Updates
STATUS FOR WATCH 0999 HAS NOT BEEN ISSUED YET Read more

WW 0999 Status Updates
STATUS FOR WATCH 0999 HAS NOT BEEN ISSUED YET Read more

WW 999 TEST SEVERE TSTM OK 191935Z - 192000Z
URGENT - IMMEDIATE BROADCAST REQUESTED TEST...Severe Thunderstorm Watch Number 999...TEST NWS Storm Prediction Center Norman OK 135 PM CST Tue Dec 19 2023 The NWS Storm Prediction Center has issued a...TEST... * Severe Thunderstorm Watch for portions of Oklahoma * Effective this Tuesday afternoon from 135 PM until 200 PM CST. * Primary threats include... SUMMARY...This is a TEST WATCH. THE TEST SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG and 30 STATUTE MILES EAST and WEST OF A LINE from 10 MILES SOUTH OF CLINTON OKLAHOMA TO 25 MILES NORTH OF CLINTON OKLAHOMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && AVIATION...A few severe thunderstorms with hail surface and aloft to 0.5 inches. Extreme turbulence and surface wind gusts to 50 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 24010. ...Spctest Read more

Cattle producers in Missouri continued to worry about moisture as the state remained drought stricken. Producers need improvement in grass conditions before herd expansion can occur. Regarding cattle, the market news manager for Missouri’s Department of Agriculture stated, “We’ve sold more this year than we did last year. But we have to remember as well, the southern half of the state last year, we’re talking 2022, they sold a lot of cows. So we’ve been on nearly a 2-year liquidation cycle in the state of Missouri.” Brownfield Ag News (Jefferson City, Mo.), Dec 19, 2023