SPC Jan 3, 2025 1630 UTC Day 1 Convective Outlook

SPC 1630Z Day 1 Outlook

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1007 AM CST Fri Jan 03 2025

Valid 031630Z - 041200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Sporadic lightning flashes may occur this afternoon and evening over
parts of the coastal Pacific Northwest and northern California.
Severe thunderstorms are not expected.

...Synopsis...

Surface high pressure from the Rockies to the Southeast will result
in a dry and stable airmass for much of the CONUS, precluding
thunderstorm activity. The exception may be along portions of the
Northwest coastal vicinity. Isolated thunderstorms are possible this
afternoon and evening across coastal OR into northern CA as a strong
upper trough moves over the Northwest. Cold temperatures aloft and
modestly steep midlevel lapse rates will support minor instability.
Low-topped convection in the wake of a surface cold front may
produce sporadic lightning flashes. A few instances of small hail
and gusty winds may also accompany this activity, but weak
instability and modest vertical shear will limit severe thunderstorm
potential.

..Leitman/Weinman.. 01/03/2025

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