Tag: 1300

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0657 AM CST Tue Dec 31 2024 Valid 311300Z - 011200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM THE CENTRAL APPALACHIANS TO PARTS OF THE MID-ATLANTIC... ...SUMMARY... Damaging to isolated marginally severe gusts, isolated large hail, and possibly a brief tornado, are possible today from the central Appalachians to parts of the Mid-Atlantic. ...Synopsis... In mid/upper levels, a progressive shortwave pattern will persist within a broadly cyclonic flow field covering much of the CONUS from the Rockies eastward. The most important of these

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0700 AM CST Sun Dec 29 2024 Valid 291300Z - 301200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM THE EASTERN GULF COAST NORTHWARD INTO THE CAROLINAS AND SOUTHERN VIRGINIA... ...SUMMARY... A few tornadoes and sporadic damaging to severe gusts are possible today from the eastern Gulf Coast northward into the Carolinas and southern Virginia. More-isolated severe storms may occur across parts of the central Appalachians and Ohio Valley, and over southernmost Florida. ...Synopsis... In mid/upper levels, a progressive pattern will persist across the

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0643 AM CST Fri Dec 27 2024 Valid 271300Z - 281200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL GULF COAST STATES... ...SUMMARY... A few strong to locally severe thunderstorms could occur today across parts of the central Gulf Coast States. ...Synopsis... In mid/upper levels, a broad area of cyclonic flow will persist around mean troughing, from the Great Basin and Rockies across the Great Plains to the Mississippi Valley. The leading shortwave trough -- in a series of them

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0649 AM CST Thu Dec 26 2024 Valid 261300Z - 271200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER MAINLY SOUTHEAST AND EAST TEXAS INTO WESTERN AND NORTHERN LOUISIANA AND SOUTHERN ARKANSAS... ...SUMMARY... Scattered severe thunderstorms capable of all hazards are possible this afternoon and evening from the southern Plains eastward into the Ark-La-Tex and lower Mississippi Valley. ...Southern Plains/Ark-La-Tex and Lower Mississippi Valley... Water-vapor imagery this morning shows a relatively compact but potent mid-level shortwave trough over west/northwest TX, and this feature will

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0644 AM CST Wed Dec 25 2024 Valid 251300Z - 261200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected today (Christmas). ...Synopsis... Water-vapor imagery this morning shows a mid-level disturbance over the northwest Gulf Coast while another upstream and more potent shortwave trough is located over UT/AZ. The Gulf Coast disturbance will weaken during the day as it moves east across the central Gulf Coast. Limited low-level mass response is forecast across southern LA due in part to relatively cool/stable conditions via

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0651 AM CST Tue Dec 24 2024 Valid 241300Z - 251200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR PORTIONS OF CENTRAL...EAST...AND SOUTHEAST TEXAS... ...SUMMARY... Isolated to widely scattered strong to severe thunderstorms capable of large hail and damaging gusts are possible late this afternoon into the overnight. ...Central and eastern TX... Water-vapor imagery early this morning shows an upper trough digging southeastward over the southern High Plains. This upper feature is expected to reach eastern TX and the western Gulf of Mexico by

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0642 AM CST Mon Dec 23 2024 Valid 231300Z - 241200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast through tonight across the contiguous United States. ...Synopsis... Water-vapor imagery this morning shows a mid-level trough over AZ moving east and a northern stream trough over the Pacific Northwest. The northern mid-level trough will latitudinally expand southward into the central Rockies/south-central High Plains as a ridge amplifies over the Interior West in its wake. As this occurs, a partial phasing of mid-level trough

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0700 AM CST Sun Dec 22 2024 Valid 221300Z - 231200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast across the contiguous United States through tonight. ...Synopsis... Water-vapor imagery this morning shows an upper trough over the eastern Pacific to the west of the Pacific Northwest coast. This upper feature will move east-northeast into British Columbia and WA/OR tonight. Cooling midlevel temperatures will result in weak buoyancy (100-200 J/kg MUCAPE) late today into tonight from portions of northern CA northward along the

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0650 AM CST Sat Dec 21 2024 Valid 211300Z - 221200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms are possible this morning into early afternoon across parts of coastal Oregon and northern California. ...Coastal OR/northern CA... A potent mid to upper-level shortwave trough will move ashore the northern CA/OR coast and continue northeastward into the southern Canadian Rockies/northern Rockies vicinity through late tonight. Weak thunderstorm activity embedded within a warm-air advection rain shield will continue moving into the coastal range mountains this morning before