SPC 0700Z Day 2 Outlook

Day 2 Outlook Image

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
0101 AM CST Tue Jan 19 2021

Valid 201200Z - 211200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
No severe storms are forecast across the continental United States
Wednesday or Wednesday night.

...Discussion...
Fast west-northwesterly flow aloft is progged across much of the
U.S. Wednesday, except over the southwestern U.S. and Great Basin
area, where a cut-off low -- initially lingering off the southern
California/Baja coast -- will prevail.  This low is forecast to
begin an eastward advance Wednesday, gradually moving inland over
southern California/northern Baja and then to the lower Colorado
Valley and adjacent northern Gulf of California by the end of the
period.

At the surface, high pressure will largely prevail over the southern
half of the CONUS, while farther north a clipper-type system moves
across southern Canada and the northern Plains, and later into the
Upper Midwest/Great Lakes region.

As the upper system moves into the southwestern U.S. with time,
showers are expected.  As cold air/steep lapse rates aloft spread
inland, particularly into the second half of the period, sporadic
lightning may also occur, embedded within the broader area of
convection.  Elsewhere, thunderstorms are not expected.

..Goss.. 01/19/2021

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