SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0154 AM CST Wed Dec 30 2020 Valid 011200Z - 021200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE SOUTHEAST AND CAROLINAS... ...SUMMARY... Thunderstorms associated with marginally severe wind gusts will be possible on Friday into Friday night from northern Florida to southern North Carolina. ...Southeast/Carolinas... An upper-level low will move northeastward into the mid Mississippi Valley on Friday as southwest mid-level flow remains from the Southeast into the Carolinas. By afternoon, a moist airmass will be located from eastern Alabama to South Carolina. This airmass is forecast to remain weakly unstable during the day. Thunderstorms are forecast to first develop in Alabama during the morning and then spread eastward across Georgia and South Carolina during the afternoon. Deep-layer shear of 40 to 50 kt across the moist sector will make conditions supportive of marginally severe storms. The best chance for a severe threat may develop in the early evening across parts of South Carolina as moisture advection increases surface dewpoints into the mid to upper 60s F. As a result, MLCAPE may peak in the 500 to 750 J/kg range across parts of southern and eastern South Carolina. The stronger storms could have an isolated wind damage threat. A marginal tornado threat will also be possible, associated with storms that remain discrete. The marginal severe threat may affect parts of southern North Carolina during the late evening and early overnight period. ..Broyles.. 12/30/2020
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