SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1141 PM CST Sat Nov 27 2021 Valid 281200Z - 291200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorm chances will remain negligible on Sunday. ...Discussion... Troughing/broad cyclonic flow aloft will shift across the eastern half of the U.S. today, while a gradually flattening ridge prevails over the western half of the country. At the surface, a cold front will shift eastward/southeastward across eastern portions of the country, reaching the western Atlantic and Gulf of Mexico overnight. Meanwhile, a weak clipper-type feature will shift out of southern portions of the Canadian Prairie and then across the north-central states during the second half of the period. Cool/stable air is progged to persist at low levels across the country. A lightning flash or two could occur near the Great Lakes as cold air aloft associated with the passing upper trough spreads atop the relatively warm lake water supporting development of low-topped convection, coverage of any lightning should remain minimal. Elsewhere, thunderstorms are not expected given the stable conditions expected. ..Goss/Elliott.. 11/28/2021 Read more LIVE: spc.noaa.gov
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