Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 280430
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
830 PM PST Tue Jan 27 2015
Cloudy skies tonight with skies turning partly cloudy on Wednesday.
Another weak system may bring isolated showers/flurries near the
Sierra crest Thursday...mostly cloudy elsewhere. A ridge of high
pressure builds over the area this weekend with night and morning
valley fog possible.
A very weak system has moved east of the region. Mid to high level
clouds will continue to spill over most areas overnight. Some
clearing over the Northern San Joaquin Valley may allow for some
fog to form late tonight and Wednesday morning. Another weak wave
will lift northeast through the area from the southeast. This will
help to keep some mid to high level cloudiness over the region
A high pressure ridge will begin to build over the region late
Friday and Saturday and will keep the interior dry with less
cloud cover. Patches of night and morning fog will be possible for
both those days in the valley. Temperatures will remain above
normal and even warm a bit for those days. Some of the warmer
interior locations could warm up into the lower 70s. Sacramento
region southward within the valley should stay in the 60s.
.Extended Discussion (Saturday through Tuesday)
High pressure builds into Northern California from the Eastern
Pacific on Saturday. This will bring dry weather on Saturday.
North to East winds are expected Friday into Saturday as surface
high pressure builds into the Pacific Northwest and into Nevada.
Breezy and gusty North to East winds are expected to weaken on
Saturday afternoon as the surface high shifts to the east.
Ridge flattens Sunday into Tuesday with the potential for some
disturbances moving through. The timing and track of these varies
with the models but they could bring a threat of precipitation.
Currently have a slight chance of showers...mainly over the
mountains north of I-80 late Sunday into Monday. Precipitation threat
spreads farther south Monday night into Tuesday. Precipitation
amounts are expected to be light.
VFR conditions except for lcl MVFR vsbys. Areas MVFR visibility
returning after 06z in BR...with local fog developing over the
northern San Joquin Valley after 12z causing periods of IFR. Light
and variable winds continue.