SPC 1300Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
0647 AM CST Thu Nov 05 2020

Valid 051300Z - 061200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Severe thunderstorms are not expected across the contiguous U.S.
today.

...South FL...
While low-level moisture has increased over the past 24 hours
(reference 12Z Miami sounding), a dry and subsident layer persists
aloft in the mid-levels which has aided in suppressing thunderstorm
development thus far. Gradual moistening is expected to continue
through the period and diurnal heating should be sufficient for
isolated thunderstorms later this afternoon that may linger into
tonight, especially along the Atlantic Coast. Weak effective bulk
shear will limit potential for any organized severe storms.

...OR/CA Coastal Border...
Intense mid-level height falls are forecast to spread inland late in
the period ahead of an upper low that should approach the northern
CA coast early Friday. Forecast soundings along the coast suggest
strong mid-level cooling during the 09-12Z period will steepen lapse
rates and may prove adequate for isolated low-topped convection
capable of lightning.

..Grams.. 11/05/2020

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