SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0256 PM CDT Fri Apr 11 2025 Valid 112000Z - 121200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM NORTHERN FLORIDA NORTHWARD TO SOUTHEASTERN VIRGINIA... ...SUMMARY... Isolated strong to severe thunderstorm potential will continue this afternoon and evening from parts of north Florida and far southeast Georgia to the eastern Carolinas and far southeast Virginia. ...Discussion... The ongoing forecast continues to reflect the evolving convective scenario across parts of the southeastern CONUS. Within the broader area of convection across this region, the strongest storms ongoing at this time are indicated across portions central and eastern North Carolina, where 500 to 1000 J/kg surface-based CAPE has evolved as a result of afternoon heating beneath cool mid-level temperatures. Meanwhile, an increase in convection is occurring from southern Georgia across north Florida and into the Panhandle, along a weak surface front. Limited/local severe risk may evolve across this region in the next 1 to 2 hours. Overall, any ongoing severe threat is forecast to diminish diurnally this evening. ..Goss.. 04/11/2025 .PREV DISCUSSION... /ISSUED 1128 AM CDT Fri Apr 11 2025/ ...North Florida to the Eastern Carolinas and Far Southeast Virginia... A mid-level trough will continue amplifying today over the southern Appalachians as one embedded speed maximum rotates northeastward over the Carolinas, and an upstream shortwave trough digs southeastward from the mid MS Valley into the Southeast. An associated weak surface low will develop northeastward across eastern NC and far southeast VA, while a trailing cold front moves southeastward into north FL. Surface dewpoints generally in the low to mid 50s, in combination with daytime heating beneath cold mid-level temperatures, will support MLCAPE up to 500 J/kg with minimal convective inhibition. Isolated to scattered thunderstorms should develop this afternoon near the cyclone track across the eastern Carolinas, and along the front in north FL. The weak instability and relatively straight hodographs aloft suggest some updraft organization will be possible, with an isolated threat for hail and strong to damaging winds this afternoon/evening. A few low-topped thunderstorms should also occur this afternoon over the southern Appalachians. However, buoyancy and deep-layer shear will be weaker compared to areas farther east/southeast, with a limited overall severe threat.
