SPC 0700Z Day 2 Outlook

Day 2 Outlook Image

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1252 AM CST Wed Jan 27 2021

Valid 281200Z - 291200Z


Severe weather is not expected across the U.S. Thursday.

Upper troughing/cyclonic flow will persist over the northeastern
U.S. Thursday, as one shorter-wavelength feature shifts eastward
into the western Atlantic, to be replaced by an upper low
progressing southeastward out of eastern Canada into the Northeast. 
Meanwhile in the West, a sharp trough just off the West Coast will
gradually advance inland through the period.  In between,
anticyclonic flow will prevail across a large portion of the central

At the surface, high pressure will prevail east of the Rockies,
though a rather pronounced lee trough over the high Plains is
expected.  Meanwhile, a rather ill-defined cold front will move
across California toward the Great Basin and Desert Southwest.

With much of the country under the influence of a continental polar
airmass, little convective potential is evident.  One exception will
be across portions of the West Coast states, as the upper trough
shifts inland.  In addition to low-topped showers, cold air/steep
lapse rates aloft accompanying the trough could support a
few/sporadic lightning flashes -- particularly near the central
California coast late in the period.  However, coverage at this time
appears likely to remain too sparse to warrant introduction of a 10%
thunder area.

..Goss.. 01/27/2021

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