SPC 0700Z Day 2 Outlook

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1248 AM CST Thu Jan 21 2021

Valid 221200Z - 231200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
No severe weather is expected across the U.S. Friday.

...Discussion...
While fast westerly/west-northwesterly flow aloft will prevail over
the eastern half of the country Friday, amplification of the upper
flow field is progged over the West.  This will occur as an upper
low, initially near the northern California/southern Oregon Coasts,
digs southeastward across California and the Great Basin.  By the
end of the period, large-scale cyclonic flow will encompass
essentially the entire western CONUS.

At the surface, high pressure will prevail east of the Rockies, as a
west-to-east baroclinic zone sags southward into the northern Gulf
of Mexico.  Meanwhile, a cold front is forecast to advance across
California and the Great Basin, and the Desert Southwest through the
period.

As the upper trough -- and associated pocket of cold air/steep lapse
rates aloft spreads across the West, scattered showers are expected.
 While a few/sporadic lightning flashes cannot be ruled out, at this
time it appears that coverage will remain low -- thus not warranting
10% thunder area introduction at this time.

..Goss.. 01/21/2021

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