SPC 1730Z Day 2 Outlook

Day 2 Outlook Image

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1211 PM CDT Mon Oct 12 2020

Valid 131200Z - 141200Z


Organized severe thunderstorms are not expected across the
contiguous United States on Tuesday.

...Synopsis and Discussion...
A progressive upper pattern is forecast on Tuesday. A lead shortwave
trough will begin the period extending from eastern Ontario
southward into GA before then tracking northeastward. A second,
low-amplitude shortwave trough will follow in the wake of the first,
moving quickly eastward across the OH Valley, while another deeper
shortwave moves across western/central Ontario and the Upper Great
Lakes. Finally, a shortwave just off the Pacific Northwest/southern
British Columbia coast early Tuesday will track quickly
eastward/southeastward, reaching the northern Plains by early

Predominantly stable conditions will exist ahead of each of these
systems. The only exception is ahead of the lead wave across coastal
New England, where a few strikes are possible within the warm-air
advection zone north of the surface low associated with this
shortwave. Cold temperatures aloft and strong forcing for ascent may
also result in a few strikes west of the Cascades in WA.

..Mosier.. 10/12/2020

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