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Local Wx Station Data Sacramento, Northern Sierra Nevada & the Motherlode Area Current Weather Conditions

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

000
FXUS66 KSTO 152057
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
157 PM PDT Wed Aug 15 2018


.SYNOPSIS...
Dry with near normal temperatures through Thursday, then above
normal Friday through early next week. Smoke impacts from
wildfires continue.
&&

.DISCUSSION...

High pressure over the Desert southwest has shifted to the east
today with upper level troughing remaining parked just to the
west of the forecast area. Monsoon moisture is expected to remain
mainly to the southeast of interior NorCal, with a very slight
chance of an isolated thunderstorm in eastern Tuolumne county.

Increased Delta Breeze has cleared smoke and haze in much of the
Valley except for those areas near wildfires. Winds will become
slightly breezier this evening into tomorrow, keeping that air
clearer. However, winds are expected to calm again by the weekend
which could allow some smoke to move back into the Valley.

Current temperatures are near or a few degrees cooler than this
time yesterday. Another few days of below or near normal
temperatures are expected through Thursday due to the onshore
flow and the upper level pattern. The trough is expected to move
through early Friday with ridging beginning to build this
weekend into early next week. Temperatures will warm again to a
few degrees above normal, though heat impacts are not expected
with this increase. Daytime temperatures in the valley are
forecast to be 95-103 degrees through early next week. HEC

&&
.EXTENDED DISCUSSION (Sunday THROUGH Wednesday)


Warm and dry weather is in store for the extended forecast period.
Ridging continues to build through early next week, allowing
temperatures to remain a few degrees above normal. Current model
runs show a shortwave trough moving through the area early to mid
week. This is expected to remain fairly weak, mostly allowing
temperatures to cool to near normal. HEC &&

.AVIATION...

Local MVFR/IFR conditions in HZ/FU near wildfires, otherwise VFR
continues over the area for the next 24 hours. Winds below 15
knnots except Local SW surface wind gusts 25 to 30 kts vicinity of
the Delta. There is a slight chance of thunderstorms over the
northern Sierra crest south of U.S. 50 through 06z this evening.

&&

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

$$

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




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