Weather Service Report

FXUS66 KSTO 050447

847 PM PST Wed Mar 4 2015

Warm and dry weather will continue the next 7 days, with a
possible return to unsettled weather for the middle of next week.


A ridge of high pressure will continue to build over Northern
California through the rest of the week with dry conditions and
warming temperatures each day. Its not likely that we would see
any appreciable fog develop again for tomorrow morning. 
Temperatures should cool off overnight between 35 and 40 for most
locations in the central valley. The mountain valley will be cold
the next couple of nights cooling into the mid teens to mid 20s
each night. We may see some haze develop late in the weak under
the stagnant conditions that should persist into the weekend.
Temperatures will warm a little each day and may become 10 to 15
degrees above seasonal normal's by the weekend. A few spots over
the far north end of the valley may warm up to around 80 degrees
for Friday and Saturday...with generally mid 70s for the remainder
of the valley.


.Extended Discussion (Sunday through Wednesday)

Upper level ridging peaks on Sunday, with dry weather and the
warmest temperatures of the week. Temperatures should be around 8
to 12 degrees above normal, but are not expected to break records.

The ridge gradually weakens on Monday and then shifts eastward on
Tuesday. High temperatures should lower a few degrees each day.
Models continue to show the approach of a system for mid to late
week, but have slowed the onset of precipitation some, especially
the latest runs of the ECMWF. The GFS is now showing a weaker wave
pushing in Tuesday night and Wednesday, while the ECMWF and the
GEM still show a significant upper level trough moving in for
Wednesday and Thursday. In spite of differences in timing and
intensity, the bottom line is that there is increasing confidence
for some precipitation mid to late next week. How widespread and
just how wet it will be remains to be seen. Snow levels are
expected to start over 8000 feet, lowering to pass levels and
potentially a little lower. An unsettled pattern could bring
additional periods of precipitation into the weekend. EK



Mainly VFR conditions with mostly clear skies across the interior
through Thursday. Local BR in San Joaquin Valley between 13Z-16Z.



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Western Regional Climate Center,