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

000
FXUS66 KSTO 271130
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
330 AM PST Mon Feb 27 2017

.Synopsis...
Flooding concerns continue as runoff from recent rain continues
to work its way downstream adding stress to waterways. Showers
linger into early Tuesday, then extended period of dry weather
starts by the middle of the week.

&&

.Discussion...
Satellite imagery depicts cold upper trof moving across NorCal
early this morning. Scattered showers continue across the
southeastern half of the forecast area with the most numerous
showers occurring over the northern Sierra to the south of I-80.
Temperatures are a little milder across much of the region early
this morning compared to 24 hours ago and generally range from the
teens and 20s in the mountains to the mid 30s to mid 40s
elsewhere.

Wave approaching Vancouver Island early this morning will drop
south into NorCal this afternoon and evening and will continue a
chance for scattered showers across the northern mountains and
northern Sierra Nevada into tonight (and a perhaps a few showers
across the northern Sacramento Valley).

High pressure from the eastern Pacific will move across the region
later Tuesday and continue through mid-week. This will lead to a
return of dry weather along with milder daytime temperatures.
Overnight lows will remain rather chilly in the valley with patchy
early morning frost.

&&

.EXTENDED DISCUSSION (Friday THROUGH Monday)
A flat ridge of high pressure will continue to bring dry weather
across interior Northern California through Friday. The ridge
weakens a bit next weekend, with both the GFS and Canadian models
hinting at a weak to moderate storm system moving through the
region. The ECMWF maintains a stronger ridge, keeping
precipitation to our north. With low confidence, our forecast is a
blend of these solutions.

Temperatures throughout the extended period are expected to be
within a few degrees of normal. Dang

&&

.AVIATION...
A weak upper level system is moving through the region. Mainly
VFR/MVFR conditions will continue across the Valley, with IFR/LIFR
conditions over the mountains through Monday. Winds will remain
below 10 kt today across Valley TAF sites. Dang

&&

.STO WATCHES/WARNINGS/ADVISORIES...
Flash Flood Watch through late Thursday night for Carquinez
Strait and Delta.

Winter Weather Advisory until 6 AM PST early this morning for
West Slope Northern Sierra Nevada.

&&

$$



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