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.)
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.
SPC AC 221629
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1129 AM CDT Thu Mar 22 2018
Valid 221630Z - 231200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE
INTERIOR VALLEY OF CALIFORNIA...
Isolated to widely scattered thunderstorms are possible today across
parts of the West. A few strong storms may occur over parts of the
California Central Valley including the possibility of a brief
tornado and/or some hail.
An extremely moist environment remains across the region via a fetch
of relatively strong deep-layer southwesterly winds to the south of
a prominent deep/closed trough centered off the coast of the Pacific
Northwest and British Columbia. Although clouds and scattered
showers will tend to curb more appreciable destabilization, even
modest cloud breaks later this afternoon into evening could allow
for some stronger updrafts and organized storm modes in the presence
of ample moisture and relatively strong low-level/deep-layer shear.
A relatively well-organized quasi-linear band of showers/few
thunderstorms has already been noted this morning across the
northern valley to the east of Sacramento. In all, a few stronger
storms may materialize across the southern Sacramento Valley and San
Joaquin Valley particularly this afternoon through early evening. A
brief tornado, hail potentially to near-severe levels, and/or gusty
winds could occur.
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NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 2000Z