Area Forecast Discussion
Issued by NWS Sacramento, CA

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

FXUS66 KSTO 020410

910 PM PDT Mon Sep 1 2014

Cooling trend early this week with near normal daytime highs
Wednesday through Saturday. Dry weather continues.


Slow cooling this evening after 100 plus degree temperatures for a
number of areas for the first time in about a month...other than
the far north end of the Sacramento valley. Not much in the way of
a marine layer this evening but NAM model is indicating a coastal
eddy forming just north of the bay which should increase the depth
of the marine layer and bring back the stratus to the coast as
early as late tonight if not during the morning hours. As a result
we might see a little bit of a bump in wind speeds through the
delta late tonight. Over the far north end of the valley light
north winds will likely bring smoke to areas up north once again
tonight and for the morning hours.

A low pressure area moving into the Pacific Northwest tomorrow
will bring some synoptic cooling to the far inland areas of the
region. The Sacramento region will also have greater flow through
the delta to help give a little bit more cooling. Winds will be
upvalley and 850 mb flow within the valley will reverse starting
in the morning and increasing for the afternoon. This will improve
any smoky conditions either by or during the afternoon hours. Much
better cooling during the evening is expected Tuesday with at
least breezy and cooler air flowing through the delta...and
possibly windy at times.

While the main part of the trough will push east by Wednesday a
baggy trough will for over the west coast and help to keep
temperatures cooler throughout the week.

.Extended Discussion (Friday through Monday)

Persistent weak troughing aloft into NorCal will bring minor
cooling. Another reinforcing trough should lower heights some
more on Monday. We have kept the forecast dry with near to
slightly above normal temperatures and variable cloudiness.



General VFR conditions over the next 24 hours. LCL vsbys around 5
miles due to smoke over north end of Sac Vly and along coastal


.STO Watches/Warnings/Advisories...

$$ is the U.S. government's official web portal to all federal, state and local government web resources and services.