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 081216
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0616 AM CST Mon Nov 08 2021
Valid 081300Z - 091200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today.
...Northern/central CA...
Low-level warm theta-e advection will increase markedly across
northern CA this evening into tonight as a shortwave trough
approaches the Pacific Northwest coast. Large-scale forcing for
ascent will contribute to lower-level moistening/destabilization as
favorable trajectories encourage PW values to breach one inch.
Elevated convection with scant buoyancy originating from parcels
between 850-700 mb should result in potential for sporadic lightning
flashes in the heaviest precip bands from late evening into the
overnight. This appears most probable across the Bay Area and
Sacramento Valley vicinity.
..Grams.. 11/08/2021
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1630Z
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