Probability of a tornado within 25 miles of a point. Hatched Area: 10% or greater probability of EF2 - EF5 tornadoes within 25 miles of a point.
Day 1 Tornado Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
No Risk Areas Forecast
Probabilistic Damaging Wind Graphic
Probability of damaging thunderstorm winds or wind gusts of 50 knots or higher within 25 miles of a point. Hatched Area: 10% of greater probability of wind gusts 65 knots or greater within 25 miles of a point.
Day 1 Wind Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
No Risk Areas Forecast
Probabilistic Large Hail Graphic
Probability of hail 1" or larger within 25 miles of a point. Hatched Area: 10% or greater probability of hail 2" or larger within 25 miles of a point.
Day 1 Hail Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
No Risk Areas Forecast
SPC AC 090518
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1118 PM CST Mon Nov 08 2021
Valid 091200Z - 101200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Scattered convection, with isolated embedded thunderstorms, is
expected across the Pacific Northwest later this morning into the
late evening hours.
...Pacific Northwest...
Strong short-wave trough is forecast to approach the Pacific
Northwest Coast later this morning, inducing notable mid-level
height falls across western WA. As the Pacific front advances
inland, westerly onshore flow and cooling profiles will result in
destabilization that will increasingly support deep convection.
Forecast sounding at UIL gradually destabilizes from late morning
through 22z when 350 J/kg SBCAPE could be present, given the
steepening lapse rates. 500mb temperatures will cool below -30C, and
marine boundary layer will provide adequate moisture for scattered
convection and isolated thunderstorms.
..Darrow/Dean.. 11/09/2021
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1300Z
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