Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 081847
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
1047 AM PST Sun Dec 8 2013
A very cold airmass will remain over Northern California through
at least midweek, bringing overnight hard freeze conditions each
The weather word of the day is cold. Frigged start to the day with
lows in the central valley in the 20s to the eastern slopes which
had lows below zero. Many single digit and teens to start the
morning for the western slopes.
Strong high pressure off the coast with low pressure moving
through the Rockies has produced an amplified ridge that is
bringing in cold Arctic air from Canada into California. The
pattern will be about the same for the next day before some slow
gradual modification starts to change in the pattern.
Hard freezes expected through Wednesday and may take until Friday
before temperatures warm enough at night to drop any concern of a
hard freeze. Some locations could be nearing or reaching record
lows the next couple of mornings. The coldest locations will
likely be reaching the freezing mark by 8 pm with all other
locations reaching the freezing mark before midnight the next few
days. 12 plus hours of freezing temperatures are expected for the
coldest locations. Temperatures will warm above freezing each
morning between 9 and 11 am.
Some Record lows for Dec 8th Sacramento 27/2009, Sac Exec 23/2009,
Stockton 22/1978, Modesto 25/2009, Redding 20/1972,
Red Bluff 19/2009.
Some Record lows for Dec 9th Sacramento 23/1932, Sac Exec 21/1972,
Stockton 23/1972, Modesto 22/1972, Redding 21/1972,
Red Bluff 20/2009.
.Extended Discussion (Thursday through Sunday)
Models continue to show little run to run consistency with
handling of waves moving into the EPAC ridge during the extended
period. One trough may impact the region late Thursday into
Friday, but models diverge significantly so not much certainty in
what will happen. Have trended toward the drier ensembles with
only a slight chance of precip in the forecast.
General VFR conditions expected the next 24 hours as high
pressure rebuilds and dry northerly flow settles in. Northerly
winds 5-15 kts develop in the Sacramento Valley by this afternoon
and continue tonight. Easterly winds 15-30 kts develop tonight
over the Sierra. -DVC
Hard Freeze Warning until 8 PM PST Tuesday Carquinez Strait and
Delta...Central Sacramento Valley...Northern Sacramento Valley...
Northern San Joaquin Valley...southern sacramento valley.
Hard Freeze Warning until 8 PM PST Tuesday below 2000 feet in the
Clear Lake/Southern Lake County...Motherlode...Northeast