Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 211027
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
327 AM PDT Sun Apr 21 2019



.SYNOPSIS...
High pressure will build over the region which will bring
increasing temperatures and dry conditions to northern California.
High temperatures will start their ascent today and peak near the
middle of the work week.

&&

.DISCUSSION...
A digging trough will sink into Nevada and is then forecast to
dive into the Desert Southwest. Behind it, high pressure will
build over northern California which allow for increasing
temperatures, dry conditions, and northerly winds. Highs for
Sunday are forecast to span the 70s to near 80 for the Valley,
while the foothills and mountains peak in the 50s and 60s. Each
day after, temperatures will continue to rise with Valley
temperatures soaring to the upper 80s to near 90 for the middle of
the week. The foothills and mountains will be above normal as
well, with their highs making it into the 70s and 80s.

In addition to the heat, we can expect to see some breezy
northerly winds across the valley the next couple of days,

&&


.EXTENDED DISCUSSION (Thursday THROUGH Sunday)

Upper ridge over the western U.S. starts out the extended
forecast mainly dry with daytime high temperatures well above
normal. Models want to paint isolated precipitation over the
northeast corner of the forecast area as weak disturbances ride
over the retreating upper ridge. A shower threat continues over
the northern zones on Friday as a shortwave moves through the
Pacific Northwest. There is enough instability to include a slight
threat of thunderstorms as well. The remainder of the forecast
area looks dry on Friday with continued, although cooler, daytime
highs. At this time, most of next weekend looks dry but model
differences bring a lack of confidence in the end of the extended
period forecast. Which ever outcome results, daytime highs should
remain at least a little above normal.


&&

.AVIATION...


Mainly VFR conditions TAF sites. Winds generally below 15 knots
except in vicinity of thunderstorms. North winds 10 to 20 knots
decreasing after 00z.
&&

.STO WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$


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