SPC 1730Z Day 2 Outlook

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1129 AM CST Sun Nov 01 2020

Valid 021200Z - 031200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Severe thunderstorms are not forecast across the contiguous United
States on Monday.

...Discussion...
A slowly progressive upper flow pattern is forecast over the U.S.
Monday, as an eastern U.S. trough moves into the western Atlantic
and Canadian Maritimes, while ridging persists over much of the
western and into the central portion of the country.  With time, the
western ridge is expected to deamplify however, as a weak upper low
moves across California and into Nevada, and a short-wave trough
embedded in the northern stream approaches the Pacific Northwest
later in the period.

With surface high pressure -- and associated dry/stable air --
prevailing over much of the country in the wake of strong eastern
U.S. cold-frontal passage, little risk for thunderstorms is evident.
 One exception will be over a portion over the Desert
Southwest/lower Colorado River Valley area.  Here, relatively steep
lapse rates aloft combined with weak large-scale ascent associated
with the aforementioned upper low may result in a few lightning
flashes emanating from high-based updrafts -- particularly during
the afternoon hours.  Elsewhere, thunderstorms are not expected
across the remainder of the country.

..Goss.. 11/01/2020

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