Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 230400
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
900 PM PDT Tue Apr 22 2014
Milder temperatures are forecast Wednesday and Thursday, then
another weather system will bring a chance of precipitation along
with cooler temperatures later Thursday into Saturday.
Thunderstorms are possible on Friday.
Showers are tapering off in the Sierra this evening. A very weak
wave is moving inland along the northwest coast but is forecast to
dissipate as it tries to move inland overnight. On Wednesday a
system will spread rain into Oregon with the tail bringing some
precipitation to the northwest coast. As it spreads inland
Wednesday night some showers or light rain may occur over the southern
Cascades and maybe into the far north end of the valley. On
Thursday the cold front will approach the northwest coast. A few
showers may occur over the far northern interior ahead of the
front. The front looks like it will move through Thursday night
into early Friday morning. Snow levels will lower overnight to
around 5000 feet and continue to lower Friday morning to around
4000 feet. Friday looks like to could be an active day for
Thunderstorms and showers post frontal. At this point there is the
potential for up to a foot of snow over the higher elevations and
around half a foot or so near pass levels. Temperatures this week
will remain cool to near normal or below normal at times.
.Extended Discussion (Saturday through Tuesday)
Models showing decreasing threat of showers on Saturday with a
lingering threat over the mountains and far Northern Sacramento
Valley. Low POPs continue Sunday, again mainly over the mountains,
as a weaker Pacific short wave trough moves through in Northwest
flow aloft. High temperatures over the weekend expected to
continue slightly below normal.
Progs similar in building ridge over Interior NorCal early next
week with dry weather and significant warming. High temperatures
by Tuesday expected in the mid 80s for the Central Valley with 60s
to 70s for the mountains and foothills.
Generally VFR conditions expected the next 24 hours. Local
Northwest to Southwest winds 10-15 kt across Valley TAF sites
will gradually weaken tonight.