Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 132108

Area Forecast Discussion
National Weather Service Sacramento CA
208 PM PDT Sun Aug 13 2017

Cooler through Tuesday then warming back up to near or slightly
above seasonal normals.


A trough of low pressure continues to deepen over the west coast.
The main impact with this low will be to bring cooler air to the
state. The low does not have a lot of moisture with it so
expecting conditions to be dry other than some possible isolated
activity over the Northeast part of the state on Monday.

The marine layer should continue to deepen tonight and will bring
a chance for some low clouds spreading into the valley Monday
morning. Some high clouds will also spread over parts of the
region tonight into midday Monday before clearing. The coolest
day of the stretch will be on Monday with a warming trend after
that back to near seasonal normals by Wednesday.


Hot, dry conditions will continue through Friday as upper level
ridging persists just off the coast of California, with daytime
highs around 5-10 degrees above seasonal normals. Models currently
hinting at an upper level low sliding down through Canada and
beginning to break down the riding over the weekend. A couple weak
clipper lows will move over NorCal Saturday and Sunday allowing
temperatures to begin cooling to near seasonal normals by Sunday.
There is more agreement among models for convection over the
central Sierra, mainly south of Highway 50, Friday and Saturday
during the afternoon and evening hours, so I have added slight
chances of precipitation to the forecast.



VFR conditions through the TAF period. Generally light winds,
except for gusts up to 20 kts near Sacramento and south, as well
as gusts to around 30 kts through the Delta.



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