SPC 1730Z Day 2 Outlook

Day 2 Outlook Image

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1205 PM CDT Wed Sep 30 2020

Valid 011200Z - 021200Z


Severe thunderstorms are not expected on Thursday.


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

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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