SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1205 PM CDT Wed Sep 30 2020 Valid 011200Z - 021200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected on Thursday. ...Synopsis... An amplified upper level pattern will persist across the CONUS on Thursday, with a ridge over the western states and a trough over the eastern states. Surface high pressure will develop east/southeast from the Plains toward the Midwest through the period. A generally dry and stable airmass will be in place behind the prior cold front which moved across the eastern U.S. earlier this week. This will limit thunderstorm activity except across south FL where deeper moisture and stronger heating will result in isolated thunderstorm potential. Additional isolated thunderstorms are possible across parts of the Great Lakes as well. Cold temperatures aloft will result in steep lapse rates and weak instability as a shortwave trough embedded in larger-scale eastern trough pivots east/northeast across the Midwest and Northeast on Thursday. Warm and dry conditions beneath the western upper ridge will preclude thunderstorm activity west of the Rockies. ..Leitman.. 09/30/2020
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