ACUS02 KWNS 020657
SWODY2
SPC AC 020655

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1255 AM CST Thu Jan 02 2025

Valid 031200Z - 041200Z

...NO THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorms are not expected on Friday.

...Synopsis...
A pair of phased shortwave troughs are forecast to progress through
the large-scale troughing expected to be in place across the eastern
CONUS, moving off the Mid-Atlantic coast by Friday afternoon.
Mid-level flow will strengthen in the wake of these waves,
coincident with another shortwave trough dropping from the northern
Plains into the Mid MS Valley. Expansive surface ridging will cover
much of the central and eastern CONUS, with the associated dry and
stable conditions dominating the sensible weather and precluding
thunderstorm development.

Father west, ridging will continue gradually shifting eastward,
ahead of a progressive shortwave trough forecast to move into the
Pacific Northwest. By early Saturday, the upper ridging is expected
to extend across the entire High Plains and into Alberta and
Saskatchewan, with the shortwave trough extending from northwest
WA/southwest British Columbia through the western Great Basin.

Frontal band associated with the progressive shortwave will likely
move onshore early Friday. Some deeper cells are possible within
this band, but these cells will still be too shallow for lightning
production. Another period of deeper convection is possible as the
upper trough and cold mid-level temperatures approach the coast
Friday afternoon. A few low-topped thunderstorms are possible
offshore, with a low-probability flash or two possible over
immediate coastal portions of WA and OR as well.

..Mosier.. 01/02/2025

$$

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