SPC 1730Z Day 2 Outlook

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1056 AM CST Mon Feb 22 2021

Valid 231200Z - 241200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
A few thunderstorms will be possible over a portion of the Pacific
Northwest and northern Rockies Tuesday.

...Pacific Northwest through northern Rockies...

Embedded within a progressive northwest flow regime, another in a
series of low-amplitude shortwave troughs will move southeast into
the Pacific Northwest and northern Rockies Tuesday afternoon and
evening. This feature will be accompanied by cold temperatures aloft
supporting steep (7.5 - 8 C/km) mid-level lapse rates and weak
instability with MLCAPE from 100-300 J/kg as the boundary layer
warms during the day. Scattered showers will likely develop with the
most numerous activity within the upslope regions of the Cascades
and northern Rockies. A few lightning flashes will be possible,
especially from late afternoon through mid evening.

..Dial.. 02/22/2021

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