Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 100424
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
924 PM PDT Wed Apr 9 2014
High pressure over the western U.S. is bringing generally fair
skies and well above normal temperatures. A weak Pacific low
pressure system will bring a threat of showers and some
thunderstorms to the Coastal and northern Sierra mountains Friday
and Saturday. Generally dry weather on Sunday, except for a few
lingering mountain showers. An unsettled pattern will bring
the possibility of mainly mountain showers next week.
Temperatures are running a little bit cooler this evening and the
high clouds continue to thin over the interior.
Light upvalley flow during the daytime with 850 MB temperatures
similar to todays values and slightly stronger flow through the
delta should bring minimal to no cooling to the interior depending
on how close you are to the delta.
Only minor changes are expected in temperatures for Friday and
Saturday as a low pressure area well to the Southwest over the
Pacific will try to move into Southern California on Friday
evening. The low will be centered over far southeastern California
on Saturday. The models continue to indicate some showers and
thunderstorms late Friday and Friday evening developing over the
Sierra south of Tahoe along the crest due to that low and over the
northern coastal range...otherwise conditions look dry elsewhere.
Some lingering showers may develop again for the same areas on
Saturday...otherwise Saturday looks dry as well.
.Extended Discussion (Sunday through Wednesday)
High pressure builds into California Sunday into Monday, bringing
mostly dry weather along with warmer than normal temperatures.
Continued instability over the mountains may continue to bring a
few showers or thunderstorms even with the presence of the ridge.
High pressure shifts eastward by late Monday as a weak trough
passes through the region. The medium-range models are in general
agreement with the timing and strength of this system. Given this,
we`ve increased the chance of showers, particularly along the
mountains north of Interstate 80. This doesnt look like a
particularly strong or wet system.
Upr rdg conts ovr Intr NorCal with VFR conds nxt 24 hrs. SWly
flow alf with genly lgt sfc wnds in the Cntrl Vly and lcl SWly
sfc wnd gsts to 25 kts ovr hyr mtn trrn durg the aftns.