Tag: convective

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0734 PM CDT Thu Apr 17 2025 Valid 180100Z - 181200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FROM EXTREME EASTERN NEBRASKA INTO WESTERN AND CENTRAL IOWA... ...SUMMARY... Isolated to scattered severe thunderstorms will continue early tonight from eastern Nebraska into western and central Iowa. Very large hail to 3 inches in diameter or greater, isolated severe gusts of 60-70 mph, and a couple of tornadoes will all be possible. ...01z Update... Water-vapor imagery suggests a weak short-wave trough is located over western NE

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0257 PM CDT Thu Apr 17 2025 Valid 172000Z - 181200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FROM EASTERN NEBRASKA INTO CENTRAL IOWA... ...SUMMARY... Isolated to scattered severe thunderstorms are expected, mainly from late afternoon into early tonight from eastern Nebraska into western and central Iowa. Very large hail to 3 inches in diameter or greater, isolated severe gusts of 60-70 mph, and a couple of tornadoes will all be possible. ...20Z Update... Very minor changes were made to the outlook with this

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0241 PM CDT Wed Apr 16 2025 Valid 162000Z - 171200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON INTO TONIGHT FROM THE TEXAS PANHANDLE TO NORTHEAST KANSAS AND VICINITY... ...SUMMARY... Isolated large hail and strong-severe outflow gusts are possible this evening into tonight from parts of the southern and central Plains into the lower to mid Missouri Valley. ...Discussion... The forecast is on track, and no change is needed to the previous outlook. ..Smith.. 04/16/2025 .PREV DISCUSSION... /ISSUED 1116 AM CDT

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0252 PM CDT Tue Apr 15 2025 Valid 152000Z - 161200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE NORTHEAST AND NEW ENGLAND... ...SUMMARY... Isolated wind damage will remain possible into the early evening across parts of the Northeast. ...20Z Northeast... The prior outlooks remains largely unchanged with only minor modifications. Broad-scale ascent beneath the upper low over the Eastern US is supporting scattered, but shallow convection across the Northeast and New England. Low-topped thunderstorms will likely continue to pose a

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0249 PM CDT Mon Apr 14 2025 Valid 142000Z - 151200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS WEST VIRGINIA AND VIRGINIA... ...SUMMARY... Scattered strong to severe storms ongoing this afternoon will continue through early tonight from the Upper Ohio Valley eastward to the Mid-Atlantic. Large hail, severe wind gusts, and a couple of tornadoes are likely. ...20z Update OH Valley and Appalachians... Afternoon satellite imagery shows several areas of convection developing beneath a broad upper low over parts of the Midwest, Great

SPC 0600Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1227 AM CDT Mon Apr 14 2025 Valid 151200Z - 161200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected on Tuesday or Tuesday night. ...Northeast... Sporadic, low-topped thunderstorms may develop towards midday through the afternoon within a post-frontal regime as 500-mb temperatures fall at/below -28 C. This should occur to the west of an intense mid-level jet that will progress quickly across the Mid-Atlantic States and off the coast by evening. While the boundary layer will be drying, scant buoyancy may persist

SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1258 AM CDT Mon Apr 14 2025 Valid 141200Z - 151200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE OHIO VALLEY...CENTRAL APPALACHIANS AND MID-ATLANTIC... ...SUMMARY... Scattered strong to severe storms are expected this afternoon and evening across parts of the Upper Ohio Valley eastward to the Mid-Atlantic. Large hail, severe wind gusts, and a tornado threat will be possible. ...Lower Ohio Valley/Central Appalachians/Mid-Atlantic... At mid-levels, a positively-tilted trough will move through the northern Plains as a low moves northeastward into Ontario.

SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0253 PM CDT Sun Apr 13 2025 Valid 132000Z - 141200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms will be possible from the Upper Mississippi Valley to the Great Lakes, and from the central Rockies to the lower Missouri Valley through tonight. Severe thunderstorms are not expected. ...20z Update... The prior forecast remains valid with only minimal changes to the western edge of the Thunder area. Isolated thunderstorms ongoing over parts of the Upper Midwest/Great Lakes should spread eastward through tonight. Additional elevated thunderstorms will

SPC 0600Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1243 AM CDT Sun Apr 13 2025 Valid 141200Z - 151200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN THE UPPER OH VALLEY AND CENTRAL APPALACHIANS... ...SUMMARY... A couple tornadoes along with scattered damaging winds and large hail are possible from mid-afternoon to mid-evening across parts of the Upper Ohio Valley and central Appalachians. ...Synopsis... A shortwave trough will further amplify over the Upper Great Lakes towards the ON/QC border, supporting gradual deepening of a surface cyclone from 995 to 990 mb. In its

SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1245 AM CDT Sun Apr 13 2025 Valid 131200Z - 141200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorm development will be possible on Sunday from the upper Mississippi Valley into the Great Lakes, and from the Intermountain West to the central High Plains. No severe threat is expected. ...DISCUSSION... At mid-levels, a ridge will move through the Great Lakes and lower to mid Mississippi Valley, as a shortwave trough moves through the northern High Plains. At the surface, a low will move into the mid