Severe Storm Outlook Narrative (AC)
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ACUS02 KWNS 160549
SPC AC 160548

Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1148 PM CST Mon Jan 15 2018

Valid 171200Z - 181200Z


Thunderstorms are not expected across the U.S. Wednesday.

A series of mid-level impulses and associated jet maxima across the
Pacific Northwest and northern Rockies will continue to foster an
evolution towards a more progressive pattern across the country.
Still, amplified cyclonic flow will persist near the Mississippi
Valley and points east Wednesday. In the wake of a vorticity max at
the base of this flow, surface high pressure will continue to build
across the Gulf Coast, precluding any poleward moisture return and
thunderstorm development east of the Rockies.

Along the Pacific Northwest coast, increasing large-scale ascent and
steepening low-level lapse rates may favor a few isolated lightning
strikes, especially across western Washington late in the period.
However, weak/thin buoyancy profiles suggest any strikes will likely
be too sparse for a thunder area at this time.

..Picca.. 01/16/2018

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