SPC 0830Z Day 3 Outlook

Day 3 Convective Outlook  
NWS Storm Prediction Center Norman OK
0157 AM CST Thu Jan 21 2021

Valid 231200Z - 241200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Severe thunderstorms are not expected across the U.S. on Saturday.

...Discussion...
Slow progression of the upper pattern is expected Saturday, as the
main feature of interest -- the upper trough over the West --
continues a slow southeasterly advance.  As this occurs, downstream
flow across the central and into the eastern U.S. will take on
gradual anticyclonic curvature in response.

At the surface, high pressure will remain prevalent east of the
Rockies, though a cold front crossing the Desert Southwest and
southern Rockies is progged to eventually reach the central and
southern Plains.

Similar to Friday, showers will accompany the advance of the upper
system across the West, as cold air/steep lapse rates aloft spread
slowly eastward.  While a few lightning flashes may again occur over
parts of the West, anticipated coverage appears insufficient to
warrant inclusion of a 10% thunder area.

..Goss.. 01/21/2021

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