Wind Advisory 22, NWS Sacramento, CA

305 
WWUS76 KSTO 260020
NPWSTO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SACRAMENTO CA
520 PM PDT MON APR 25 2016

CAZ015>019-260130-
/O.EXP.KSTO.WI.Y.0022.000000T0000Z-160426T0000Z/
NORTHERN SACRAMENTO VALLEY-CENTRAL SACRAMENTO VALLEY-
SOUTHERN SACRAMENTO VALLEY-CARQUINEZ STRAIT AND DELTA-
NORTHERN SAN JOAQUIN VALLEY-
INCLUDING THE CITIES OF...REDDING...RED BLUFF...CHICO...
OROVILLE...MARYSVILLE/YUBA CITY ...SACRAMENTO ...
FAIRFIELD/SUISUN ...STOCKTON...MODESTO
520 PM PDT MON APR 25 2016

...WIND ADVISORY HAS EXPIRED...

THE WIND ADVISORY FOR THE SACRAMENTO VALLEY...DELTA...AND
NORTHERN SAN JOAQUIN VALLEY HAS EXPIRED. NORTHERLY WINDS 
HAVE DECREASED TO ABOUT 10 TO 20 MPH THIS EVENING...AND 
WILL CONTINUE TO DECREASE OVERNIGHT. 

INTERACT WITH US VIA SOCIAL MEDIA
WWW.FACEBOOK.COM/NWS.SACRAMENTO
WWW.TWITTER.COM/NWSSACRAMENTO

$$

Area Forecast Discussion
National Weather Service Sacramento CA
953 PM PDT SUN APR 24 2016

.Synopsis...
Unsettled and cool weather Sunday and Monday, then again Tuesday
night and Wednesday.

&&

.Discussion...
Cluster of strong thunderstorms developed around Maxwell this
afternoon and moved ESEwd...interacting with the Delta Breeze
E of SAC...and forming a line of storms from around Granite Bay Swd
to Rancho Seco. This line moved E into the Motherlode. As the
cluster of storms neared or intersected with the Delta Breeze
between Rocklin/Granite Bay...radar indicated a potential rotating
head configuration but with very weak circulation...and did not
receive reports of any rotating storms there. Activity is finally
windind down with lingering showers and isolated over zone 69 S of
I-80.

The center of the trough will be over Central Nevada on Monday and
may bring some wrap around moisture and showers to the Sierra
Nevada. Snow levels look to be around 7000 feet during the day.
Most other areas should remain dry, cool with breezy to locally
windy northerly winds for the valley. The strongest winds look
like they should be over the west side of the valley. Nly pressure
gradients have increased to 8 mbs or so...a little stronger than
forecast...so the models may be slightly understanding the strength
of the Nly gradients initially. Wind advisory may be needed on Mon
for the Valley given the gradients...925 mbs winds and forecast
strength of the subsidence in the wake of the vort max moving
through the Nly flow in the wake of the Central NV upper low.

Tuesday will be dry and warmer as a ridge builds over the area
with lighter northerly flow. The dry weather looks short lived as
another system moves into the region Tuesday night and Wednesday.
Wednesday's system should bring a little bit more precipitation to
the region with the best chances continuing over the foothills and
mountains. Have left out any mention of thunderstorms for now but
at this point perhaps a low probability for some on Wednesday
looks possible. Several inches of snow also looks possible near
pass levels.         /JHM

.EXTENDED DISCUSSION (Thursday THROUGH Sunday)

Upper low continues to dig southward into SoCal Thursday
maintaining a slight chance of wrap around showers over the
eastern foothills and mountains...from near Lassen Park southward.
Drier with warming temperatures and locally breezy North to East
wind Friday into the weekend as upper ridging builds over NorCal.
&&

.AVIATION...

General VFR conditions tonight except for local MVFR/IFR lingering
showers and evening thunderstorms over the mountains and
foothills...snow showers possible above 5000 feet. Areas of
northerly surface winds gusting 20 to 30 kt through 18z with LLWS
possible in the Valley overnight. Winds may gust up to 35-40kt
Monday afternoon. EK
&&

.STO Watches/Warnings/Advisories...
None.
&&