Severe Storm Outlook Narrative (AC)
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ACUS01 KWNS 180044
SWODY1
SPC AC 180042

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0642 PM CST Sat Feb 17 2018

Valid 180100Z - 181200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
A few lightning strikes remain possible tonight mainly over the
Pacific Northwest coastal areas.

...Pacific Northwest coast...

Steepening lapse rates with cold mid-level temperatures accompanying
an upper low circulation moving south southeastward through the
Pacific Northwest will result in weak instability (MLCAPE at or
below 300 J/kg) within post-frontal regime along coastal WA and OR.
This environment may become at least marginally sufficient for
scattered low-topped convection to produce a few lightning strikes
overnight.

...Southwest TX...

A weak warm-advection regime will evolve across southwest TX
resulting in weak destabilization. A few elevated showers and
possibly a lightning strike or two may occur in this environment
late tonight. However, coverage of any thunderstorms is expected to
remain less than 10%.

..Dial.. 02/18/2018

$$


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