Severe Storm Outlook Narrative (AC)
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ACUS02 KWNS 231726
SPC AC 231725

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1125 AM CST Tue Jan 23 2018

Valid 241200Z - 251200Z


Isolated thunderstorms will be possible across coastal areas of the
Pacific Northwest Wednesday into Wednesday night.

A relatively progressive mid/upper ridge will shift eastward from
the Great Basin and northern Rockies to the central/northern Plains
through the period. This progression will occur while an upstream
jet core impinges upon the Pacific Northwest coast Wednesday. In
turn, heights will gradually lower along the West Coast and
temperatures will cool, with 500mb temps below -30 C overspreading
parts of Washington, Oregon, and northern California. Concurrently,
a weak surface cold front will move onshore through the day,
resulting in a modest steepening of low-level lapse rates. Near the
coast, forecast soundings depict adequate boundary-layer moisture
for buoyancy profiles that may support a few deeper convective
elements Wednesday into Wednesday night. These stronger convective
elements will be capable of isolated lightning strikes as they
approach shore.

..Picca.. 01/23/2018

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