Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 121108
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
408 AM PDT Wed Mar 12 2014
Building high pressure will result in dry weather and milder
temperatures for the rest of the week. Breezy to strong north to
east winds will continue this morning mainly across the Sierra
Nevada and Lake County.
.Short Term Discussion (Today through Saturday)...
High pressure continues to build over the Great Basin today. NAM
925 and 850 mb (roughly 2500 and 5000 ft AGL) forecast northeast
to east wind at 25 to 35 knots. This equates to the strongest
winds being across the Sierra southward of Plumas Co. and also
across Lake Co. As a result, we extended the wind advisory for
Lake Co until 8am and added a new advisory to cover the Sierra
southward of Plumas Co. until 11am. Observation reports are
showing sustained wind of 20 to 40 mph with some gusts in the 60s
and 70s. The Sacramento-Reno surface pressure gradient has
decreased somewhat since yesterday afternoon, but is still at 7
mb. The overall wind speeds across interior northern CA will
slacken as the day goes on, but still remain breezy.
Temperatures will be warming into the 70s for the valley into the
weekend and the winds will be lighter. High pressure will dominate
the region the next couple of days and we can expect warm, dry
conditions. There is a weak shortwave that moves through to the
north on Friday that may be able to bring some showers to the far
northern part of the state, but not likely. JClapp
.Extended Discussion (Sunday through Wednesday)
High pressure will remain in control through Sunday and Monday,
bringing continued dry weather and warm temperatures. Look for
highs to potentially reach the lower 80s across much of the
Longer range models continue to hint at a low pressure system
approaching Northern California for the middle of next week. The
GFS is the most progressive, with a weak closed low moving inland
over NorCal whereas the ECMWF holds the system off until late
Wednesday or Thursday. Confidence is low in timing and track of
the system, but have introduced "slight chance" wording to
highlight the potential for unsettled weather.
VFR conditions the next 24 hours as high pressure builds over the
region. Across the Valley, north winds 10-15 kt with occasional
gusts to 25 kt will continue today, diminishing this evening. Over
the mountains, local NE wind gusts up to 55 kt will gradually
diminish this afternoon and tonight.
wind advisory until 11 am pdt this morning west slope northern
wind advisory until 8 am pdt this morning above 1000 feet in the
clear lake/southern lake county.