Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 262121
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
221 PM PDT Sun Apr 26 2015
High pressure brings dry conditions through at least mid week.
Above normal temperatures will rule with warmest temperatures on
Monday and slight cooling trend through the end of the week.
A ridge of high pressure is building over the region today into
Monday. A few high clouds are spilling over the ridge into the
region today and tonight but skies will remain mostly clear.
Surface high pressure will increase over the Great Basin tonight
and some local gusty winds over the western slopes will likely
The ridge will peak over the region on Monday and temperatures
will warm well into the 80s with some of the warmer spots topping
off around 90 degrees. A lighter northerly flow will continue.
Mountains will generally warming into the 60s and 70s.
A through will approach the region on Tuesday and the ridge axis
will be moved to the east over Nevada. Wind flow within the valley
will reverse direction and flow through the delta should become
stronger. Temperatures should start a cooling trend. The trough
will move over the interior on Wednesday but at this time it is
moisture deprived so no showers are expected. We may see some high
clouds Tuesday and Wednesday from this trough. Temperatures look
to stay between 5 and 10 degrees above seasonal normal`s during
this time period.
.Extended Discussion (Thursday through Sunday)
The general consensus in the extended period is for a very weak
upper trough to remain over the region. If this solution pans out,
warm temperatures are likely to continue into next weekend. The
pattern would favor a Delta Breeze to occur, but would likely
bring cooling only to areas immediately adjacent to the Delta. The
upper trough could also bring isolated mountain showers, but not
enough confidence in timing and location to include them in the
forecast just yet.
VFR conditions expected across interior NorCal the next 24 hours.
Northerly 10-15 kts with local gusts around 25 kts in the Central
Valley will continue through about 03z. Over the mountains, local
NE gusts up to 35 kt possible overnight tonight.