SPC Dec 20, 2025 1300 UTC Day 1 Convective Outlook

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0632 AM CST Sat Dec 20 2025 Valid 201300Z – 211200Z …NO SEVERE THUNDERSTORM AREAS FORECAST… …SUMMARY… Severe thunderstorms are not expected, but a few lightning flashes may occur today near coastal Washington. …Discussion… Progressive/low-amplitude flow aloft will prevail over …
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SPC Dec 20, 2025 Day 4-8 Severe Weather Outlook

Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0236 AM CST Sat Dec 20 2025 Valid 231200Z – 281200Z …DISCUSSION… The large-scale pattern next week will be highlighted by prominent upper ridging and anomalously high 500-mb heights over much of the central to eastern CONUS, with upper troughing developing toward …
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SPC Dec 20, 2025 0830 UTC Day 3 Severe Thunderstorm Outlook

SPC 0830Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0126 AM CST Sat Dec 20 2025 Valid 221200Z – 231200Z …NO THUNDERSTORM AREAS FORECAST… …SUMMARY… Severe thunderstorms are not expected on Monday. …Discussion… The large-scale pattern will undergo modest amplification on Monday via additional upper ridging over the south-central …
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SPC Dec 20, 2025 0700 UTC Day 2 Convective Outlook

SPC 0700Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1148 PM CST Fri Dec 19 2025 Valid 211200Z – 221200Z …NO SEVERE THUNDERSTORM AREAS FORECAST… …SUMMARY… Severe thunderstorms are not expected Sunday. …Discussion… Progressive/generally zonal upper-level flow will prevail over the CONUS on Sunday. A low-amplitude shortwave trough will …
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SPC Dec 20, 2025 0600 UTC Day 1 Convective Outlook

SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1120 PM CST Fri Dec 19 2025 Valid 201200Z – 211200Z …NO SEVERE THUNDERSTORM AREAS FORECAST… …SUMMARY… Isolated lightning flashes may occur near coastal sections of Washington today. …Synopsis… A mid-level trough will progress across the eastern CONUS while upper …
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SPC MD 2264

MD 2264 CONCERNING TORNADO WATCH 642… FOR PARTS OF THE DEEP SOUTH Mesoscale Discussion 2264 NWS Storm Prediction Center Norman OK 0654 PM CST Thu Dec 18 2025 Areas affected…parts of the Deep South Concerning…Tornado Watch 642… Valid 190054Z – 190230Z The severe weather threat for Tornado Watch 642 continues. SUMMARY…Limited tornado and strong gust …
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SPC Tornado Watch 642 Status Reports

WW 0642 Status Updates STATUS REPORT ON WW 642 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NW MEI TO 40 NNE CBM TO 25 NE MSL. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 2264. ..GRAMS..12/19/25 ATTN…WFO…HUN…BMX…JAN…MEG… STATUS REPORT FOR WT 642 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ALC033-043-057-059-063-075-077-079-083-089-093-103-107-119-125- 127-133-190240- AL . …
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SPC Tornado Watch 642

WW 642 TORNADO AL MS 182305Z – 190300Z URGENT – IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 642 NWS Storm Prediction Center Norman OK 505 PM CST Thu Dec 18 2025 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Western and Northern Alabama Eastern Mississippi * Effective this Thursday afternoon …
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SPC MD 2263

MD 2263 CONCERNING SEVERE POTENTIAL…WATCH POSSIBLE FOR EASTERN MS…WESTERN/NORTHERN AL…SOUTHERN MIDDLE TN Mesoscale Discussion 2263 NWS Storm Prediction Center Norman OK 0436 PM CST Thu Dec 18 2025 Areas affected…eastern MS…western/northern AL…southern Middle TN Concerning…Severe potential…Watch possible Valid 182236Z – 190000Z Probability of Watch Issuance…60 percent SUMMARY…Increasing potential for a tornadic supercell or two appears …
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SPC MD 2262

MD 2262 CONCERNING SEVERE POTENTIAL…WATCH UNLIKELY FOR EASTERN ARKANSAS INTO NORTHERN MISSISSIPPI…WESTERN TENNESSEE…WESTERN KENTUCKY…AND SOUTHERN INDIANA Mesoscale Discussion 2262 NWS Storm Prediction Center Norman OK 0348 PM CST Thu Dec 18 2025 Areas affected…Eastern Arkansas into northern Mississippi…western Tennessee…western Kentucky…and southern Indiana Concerning…Severe potential…Watch unlikely Valid 182148Z – 182345Z Probability of Watch Issuance…20 percent SUMMARY…Sporadic …
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