Area Forecast Discussion
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FXUS66 KSTO 152217

Area Forecast Discussion
National Weather Service Sacramento CA
317 PM PDT Sat Sep 15 2018

Below average temperatures continue into next week. Patchy smoke
and haze will continue, mainly over Shasta County.



A deep upper level trough axis remains parked over the eastern
Pacific. A shortwave trough moved over the forecast area today.
This brought a line of of early morning showers, which moved over
the Sierra and dissipated by mid morning. Skies have cleared
across interior NorCal behind the frontal passage, and dry
conditions are expected for the rest of the forecast period.
Temperatures today and tomorrow will be similar to today with
Valley highs in the high 70s to low 80s. Locally breezy conditions
are expected through this evening, especially over the higher
Sierra, as the shortwave continues to pass over the area.

The upper level trough axis is expected to remain off the coast
through at least midweek. Temperatures will increase slightly
Monday and Tuesday as slight ridging occurs over the forecast
area. However, temperatures will still be 5 to 10 degrees below
normal across the Valley. HEC



The upper level trough is expected to weaken and push east across
California Tuesday night into Wednesday with ridging to follow
behind on Thursday. Temperatures will warm to near normal by
Thursday, remaining there through the extended period. Models are
currently pushing another shortwave trough through the area Friday
bringing gusty northerly winds to the Valley. Weather is still
expected to remain dry through the end of the week. HEC



VFR conditions the next 24 hours except for local MVFR/IFR near
the Delta fire. Southwest wind gusts to 25 mph through the Delta.
Locally breezy southwest wind gusts 30 to 35 kts through 06z this
evening over the Sierra. Gusts 15 to 20 kts possible at TAF sites
through 03z this evening, with lighter winds overnight. EK



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