SPC 1200Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1120 PM CST Wed Nov 18 2020

Valid 191200Z - 201200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Aside from portions of the Pacific Northwest coast vicinity, the
risk for thunderstorms appears negligible across much of the U.S.
Thursday through Thursday night.

...Synopsis...
A zonally oriented pattern aloft will persist across the Lower 48
today, with weak/subtle shortwave troughs migrating across the
Northwest.  These troughs (and the cold air aloft associated with
them) may create enough mid-level instability for convection and a
few lightning flashes through early evening.

Elsewhere, an anticyclone centered over the Southeast will maintain
relatively stable conditions across much of the remainder of the
CONUS.  Return flow/low-level moistening will occur across Texas and
Oklahoma (especially late), but the moistening will likely not be
enough to foster deep, lightning-producing convection.

..Cook.. 11/19/2020

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