SPC AC 101629
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1029 AM CST Mon Jan 10 2022
Valid 111200Z - 121200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
The risk for thunderstorms appears negligible across much of the
U.S. Tuesday through Tuesday night.
...Synopsis...
A reinforcing intrusion of cold/dry air has overspread much of the
U.S. east of the Rockies. The shallow leading edge of this airmass
appears likely to advance through the remainder of the Florida
Peninsula by 12Z Tuesday, as a significant short wave trough digs
southeast of the upper Great Lakes region through much of the
Northeast, before turning eastward off the New England coast.
Although mid-level flow along the Atlantic Seaboard may then trend a
bit more zonal and less confluent, cold surface ridging will be slow
to lose influence across much of the Gulf and south Atlantic Coast
region. As larger-scale mid-level troughing once again amplifies
upstream, across parts of the upper Great Lakes region through the
middle and lower Missouri Valley by late Tuesday night (downstream
of building ridging near the Pacific coast), generally dry and/or
stable conditions are expected to be maintained.
Across the West, a plume of moisture emanating from the subtropical
Pacific is forecast to overspread portions of the Pacific Northwest,
around the western periphery of the building ridge. This may be
accompanied by areas of precipitation and embedded convection, aided
by forcing associated with lower/mid tropospheric warm advection.
However, due to warm layers aloft, the potential for any convection
to produce lightning appears generally negligible.
...Southeast Florida Atlantic coastal areas...
Models suggest that weak to modest boundary-layer destabilization is
possible near coastal areas Tuesday, as the post-frontal
boundary-layer remains relatively moist (surface dew points in the
mid 60s F) beneath cooling mid-level temperatures. In the presence
of weak/ weakening mid-level inhibition, occasional widely scattered
thunderstorms are possible where northeasterly low-level flow
focuses convergence near or just east of the coast. This may be
aided by forcing for ascent associated with one or two weak
perturbations within otherwise broadly cyclonic mid-level flow.
..Kerr.. 01/10/2022
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