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000
FXUS66 KSTO 242132
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
232 PM PDT Tue May 24 2022

.Synopsis...
Hot temperatures with dry and breezy conditions today and again
tomorrow. Cooler temperatures Thursday into the weekend. Slight
chance for very light showers Shasta county and surrounding
terrain Saturday into Sunday. Dry and breezy winds return early
next week.

&&

.Discussion...
Bountiful sunshine is being observed over the Golden State this
afternoon. Dry and breezy conditions are also being observed
with the breeziest locations mainly in the Sacramento Valley and
along the eastern foothills of the northern coastal range
mountains. Gusts around 20-30 mph in the Valley will decrease
overnight with lingering breezy winds again tomorrow. Very dry air
is also in-place across interior northern California with current
humidity readings generally in the teens to 25 percent. However,
areas along the central to western half of the Valley are in the
single digits. High are forecast to top out near the century mark
today, running about 10 to 15 degrees above average for this time
of year and will threaten a few daily high temperature records.

Ensembles are in good agreement high pressure will continue to
bring hot and dry conditions again tomorrow with areas of locally
breezy winds. Northerly flow is forecast to continue through the
Valley tonight and will help to keep relatively warm temperatures
overnight with a few record high minimum temperatures possible
tomorrow morning. Thermal belts along the foothills will also
remain warm with some locations only cooling off into the mid to
upper 70s. Highs tomorrow are forecast to climb above 100 degrees
for much of the valley with the hottest locations nearing 105
degrees. Daily record highs are again possible for several
locations tomorrow. A Delta Breeze is also forecast to increase
tomorrow, aiding in some cooling for delta influenced areas by
tomorrow evening.

A weak shortwave is forecast to pass through the region Thursday
into Friday. Main impact will be the initiation of a cooling trend
as the ridge axis shifts to our east and flow becomes onshore.
Some clouds are likely, however precip chances remain very low. A
sprinkle or two may be possible over the highest mountain peaks.

Record temperatures for today and tomorrow:

                 Tue (May 24)      Wed (May 25)
Redding..........102 (1982)        103 (1982)
Red Bluff........105 (1943)        105 (1982)
Downtown Sac.....100 (2001)        100 (2020 & 1951)
Sac Exec.........100 (1982)        100 (1951)
Stockton.........104 (1982)        102 (1979)

SLL

&&
.EXTENDED DISCUSSION (Saturday THROUGH Tuesday)...

Cooler temperatures continue into the holiday weekend as a trough
deepens over the western US. As the trough passes over NorCal
Saturday into Sunday it could bring light showers over northern
portions of the CWA. Clusters show high pressure building inland
early next week resulting in dry and warmer weather with some
gusty north to east wind, possibly bringing back elevated fire
weather concerns. Stay tuned for updates!

&&

.AVIATION...

VFR conditions the next 24 hours. Northerly winds 10 to 15 knots
with gusts to 25 knots, strongest winds over the northern
Sacramento Valley. Winds diminish under 10 knots after 01z.


&&

.STO WATCHES/WARNINGS/ADVISORIES...
Red Flag Warning until 11 AM PDT Wednesday for Carquinez Strait
and Delta-Central Sacramento Valley in Glenn, Colusa, Yuba,
Northern Sutter, and Butte County Below 1000 Ft-Eastern
Mendocino NF-Northern Sacramento Valley to Southern Tehama
County Line Below 1000 Ft-Northern Sierra Foothills from 1000 to
3000 Ft. Includes portions of Shasta-Trinity and Butte Units-
Southeast Edge Shasta-Trinity NF and Western Portions of Tehama-
Glenn Unit-Southern Sacramento Valley in Yolo-Sacramento Far
Western Placer, southern Sutter and Solano County Below 1000 Ft.

Heat Advisory until 11 PM PDT Wednesday for Carquinez Strait and
Delta-Central Sacramento Valley-Northeast Foothills/Sacramento
Valley-Northern Sacramento Valley-Northern San Joaquin Valley-
Southern Sacramento Valley.

&&

$$