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...
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
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%.
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0600Z