SPC 1200Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1129 PM CST Thu Dec 24 2020

Valid 251200Z - 261200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
A few lightning flashes may occur over New England, and across
portions of the Pacific Northwest later tonight.

...New England...

Strong low-level warm advection will be noted across New England
today ahead of a strong upper trough that will eject into eastern NY
by the end of the period. While modified low-level moisture will
advance inland ahead of the cold front, forecast soundings suggest
parcel buoyancy will be rooted above the boundary layer and only
weak elevated convection is expected ahead of the front. The
strongest updrafts may yield a few lightning flashes.

...Pacific Northwest...

Height falls are expected to spread across the Pacific Northwest
later today as a short-wave trough moves onshore during the latter
half of the period. As heights fall, cooling mid-level profiles and
steepening lapse rates should support scattered convection
immediately ahead of a cold front that should move onshore toward
the end of the period.

..Darrow/Wendt.. 12/25/2020

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