Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 282109
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
209 PM PDT Sat Mar 28 2015
Mainly warm and dry weather will continue into next week for most
of the region. Weak systems may bring a few showers to the
mountains this Sunday into early next week.
A couple of weak waves are moving through the northern part of
the state today. One south of Sacramento and another one pushing
through the far northern part of the state. Both are dry and only
producing some high clouds. The waves will continue to push south
and east this evening. Surface high pressure building in behind
the northern wave has resulted in some gusty winds for parts of
the valley. The winds will subside this evening.
As a weak ridge builds over the area on Sunday a very weak
shortwave will move through the southern CWA area. The models are
trying to indicate some showers near the crest from around Alpine
County southward on Sunday as a result of this shortwave. The
shortwave moves to the east by Monday and an approaching low
pressure system off the Pacific Northwest coast will gradually
break down the ridge and replace it with cyclonic flow aloft.
On Tuesday that weak system will pass by to the north and may
bring a few showers over the far north end of the valley and
mountain areas north of I-80. Areas to the south will be
remaining dry but much cooler by 5 to 15 degrees with the greatest
cooling occurring in the mountains.
.Extended Discussion (Wednesday through Saturday)
A secondary weak wave will pass through Northern California
Wednesday into Wednesday night. The latest model runs are a little
bit wetter than previous ones, but keep any sort of precipitation
mainly along the Shasta County mountains and southern Cascades.
High pressure will return Thursday into Friday and could result in
another period of breezy north winds.
Longer range models are hinting at a potentially stronger and
colder system moving through Northern California next weekend.
There is still plenty of model uncertainty with regards to timing
and intensity of that system, but we`ll pay close attention to
VFR conditions will continue the next 24 hours. Northerly winds
10-15 kt across the Valley will weaken to below 10 kt by this