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NWS Area Weather Forecast Discussion
County Warning Area [CWA]: STO
Regional NWS Weather Office: Sacramento, CA

000
FXUS66 KSTO 241655
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
955 AM PDT Sun Jun 24 2018

.SYNOPSIS...
Cooler in the Delta area today, while inland areas remain hot and
dry. Temperatures return to near normal beginning Monday and
through the rest of the week.

&&

.DISCUSSION...
A Heat Advisory continues for much of the area outside of the
Sierra. There are cooler temperatures this morning in Delta
breeze influenced areas, though. In Fairfield at 9 am it`s 69, 18
degrees cooler than yesterday, with a sustained wind of 24 mph,
gusting to 31 mph. At 9 am it was 78 in Vacaville, 11 degrees
cooler. Sacramento Executive Airport is 74, 8 degrees cooler.
Temperatures are going to remain below 100 in those areas and will
see quite a bit of cooling tonight as the breeze strengthens.

For areas away from the breeze, another day of triple digit heat
is expected. Redding and Red Bluff have forecast highs of 108,
after only dropping only to 83 and 82, respectively. These could
be record high minimums, if they hold up through midnight.

A Red Flag Warning is expected into this evening, with northerly
winds and low humidity levels. Critical fire weather conditions
could bring rapid spread to wildfires, such as we have been seeing
since yesterday. The shift to onshore flow will bring increasing
humidity, especially overnight tonight, and this will gradually
reduce fire weather danger. EK

&&

.EXTENDED DISCUSSION (Thursday THROUGH Sunday)

Broad upper troughing moves through Thursday then Interior NorCal
sandwiched between EPAC upper ridge and downstream trough. Ridge
remains offshore through the weekend limiting amount of interior
heating. Attm, high temperatures expected to be above normal
through the extended, but not excessively hot with 90s expected
in the Central Valley and 70s to low 90s for the mountains and
foothills. Dry weather continues with breezy northerly wind Friday
into the weekend.

&&

.AVIATION...

VFR conditions the next 24 hours, except for isolated MVFR
conditions due to wildfire smoke near Clear Lake, Red Bluff, and
NE Foothills of Sacramento Valley. Northerly wind gusts up to 20
kts possible in the Central Valley today, then southerly wind
gusts to 25 kts tonight. Gusts up to 35 kts in the Delta today and
this evening.


&&

.STO WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 8 PM PDT this evening for Central Sacramento
Valley-Clear Lake/Southern Lake County-Motherlode-Mountains
Southwestern Shasta County to Northern Lake County-Northeast
Foothills/Sacramento Valley-Northern Sacramento Valley-Northern
San Joaquin Valley-Western Plumas County/Lassen Park.

Red Flag Warning until 8 PM PDT this evening for Carquinez
Strait and Delta-Central Sacramento Valley in Glenn, Colusa,
Yuba, Northern Sutter, and Butte County Below 1000 Ft-Eastern
Mendocino NF-Eastern Portion of Shasta/Trinity NF-Lake County
Portion of Lake-Napa-Sonoma Unit-Northern Motherlode From 1000
to 3000 Ft. Includes portions of Nevada-Yuba-Placer-Amador and
ElDorado Units-Northern Sacramento Valley to Southern Tehama
County Line Below 1000 Ft-Northern San Joaquin Valley in San
Joaquin and Stanislaus Counties 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 Motherlode From
1000 to 3000 Ft. Includes portions of Calaveras-Tuolumne Unit-
Southern Sacramento Valley in Yolo-Sacramento Far Western
Placer, southern Sutter and Solano County Below 1000 Ft.

&&

$$

Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather




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