SPC AC 060558
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1158 PM CST Tue Dec 05 2017
Valid 071200Z - 081200Z
...NO THUNDERSTORM AREAS FORECAST...
No thunderstorms are expected on Thursday.
A deep upper trough will cover much of the CONUS at the beginning of
the period with upper ridging in place along the West Coast. This
highly amplified pattern will persist, and perhaps deepen, as it
gradually shifts eastward during the day. By 12Z Friday, expansive
upper ridging will likely be centered over northern CA/southern OR
and positively tilted upper troughing will extend from the Hudson
Bay into northern Mexico.
At the surface, strong high pressure will expand
eastward/southeastward into the middle/lower MS Valley and
Southeast, helping the dry, cold, and stable continental airmass
remain in control of the sensible weather across the majority of the
CONUS. The only exception is from south TX northeastward into the
Carolina where some showers are possible within the warm-air
advection zone north of the decaying front. However, moist profiles
and resulting poor lapse rates will temper instability, keeping
lightning potential very low.
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NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 1730Z