Area Forecast Discussion
Issued by NWS Sacramento, CA

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000
FXUS66 KSTO 282226
AFDSTO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
326 PM PDT Tue Oct 28 2014

.Synopsis...
Mild weather through early Thursday. A frontal system will impact
northern interior California late Thursday into Saturday with rain
and snow and cooler daytime temperatures. Snow levels will lower
to around 4000 ft Saturday morning. Drier and warmer weather early
next week.

&&

.Discussion...
Mostly sunny this afternoon except for some clouds over Shasta
County ahead of a weak front. Temperatures warming up into the
70s in the Valley and mid 50s to 60s in the mountains this
afternoon. These temperatures are near to a little above normal
for this time of year. Temperatures will warm up a little more on
Wednesday with highs in the mid 70s to low 80s in the Valley and
upper 50s to low 70s in the mountains. There is a slight chance of
showers for Western Shasta County as a weak front brushes by
tonight into early Wednesday, otherwise dry through early Thursday.
Temperatures will start to cool a little on Thursday as a system
approaches the area.

A colder and wet storm comes in late Thursday into Friday
(Halloween) spreading precipitation across interior Northern
California. Showers will continue Friday night and Saturday as
upper level trough moves over the area. Gusty Southerly winds are
expected on Friday as the front moves through the area. The
heaviest precipitation is expected in the north Friday morning and
the south in the afternoon. Precipitation is possible for the
trick or treaters Friday evening. Thunderstorms are possible with
instability behind the front Friday late afternoon and evening.
Valley precipitation amounts may generally be around a quarter to
half an inch and one to two inches in the Sierra and Shasta County
mountains. Snow levels will start out around 7000 to 8000 ft
Friday morning and lower to around 4000 ft Saturday morning. This
will bring winter driving conditions and possible travel delays
over the Sierra Friday into Saturday. High temperatures will only
be in the 60s in the Valley and low 30s to low 50s in the
mountains on Friday and Saturday which is several degrees below normal for
this time of year. With the colder airmass and some clearing
Friday night will be cooler.

The trough shifts east late Saturday into Sunday with ridging
forecast to return into early next week. A weak system may glance
by the far North, mainly Shasta County for a slight chance of
showers, otherwise dry conditions and warmer max temperatures are expected
Sunday through Tuesday. Temperatures are expected to warm up to
near normal on Tuesday with highs in the upper 60s to mid 70s in
the Valley and upper 40s to low 60s in the mountains.

&&

.Aviation...

VFR conditions expected to continue over the next 24 hours. A weak
disturbance will bring a slight chance of light rain showers to
the coastal mountains tonight, dry elswhere. Scattered mid level
clouds over the northern Sacramento Valley. Winds will remain
generally below 10 knots. EK

&&

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

$$







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