Area Forecast Discussion
Issued by NWS San Francisco Bay Area, CA

Current Version | Previous Version | Text Only | 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

000
FXUS66 KMTR 061623
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco Bay Area
823 AM PST Mon Feb 6 2023

.SYNOPSIS...Quiet weather returns tomorrow and persists for the
remainder of the week. Expect cold to chilly mornings for interior
valleys during the first half of the week.

&&



.DISCUSSION...as of 08:24 AM PST Monday...Cool and mostly clear
start to the day around the Bay Area and Central Coast. A Frost
Advisory remains in effect through 9 AM for North Bay Valleys
given temps in the low to mid 30s. There are some other colder
spots across far interior Monterey/San Benito counties. Elsewhere,
temperatures are in the mid 30s to mid 40s. KSTS did report fog
earlier this morning, but has since dissipated.

Rather quiet weather to start the work week. No update needed this
morning. Will be fine tuning potential rain chances next weekend
with the afternoon forecast package. For more details see below...


&&

.PREV DISCUSSION...as of 12:10 AM PST Monday...

Today and Tonight:

Upper troughing will depart and allow deep ridging to take hold
across the region. This will lead to clearing skies and seasonally
cool temperatures today as readings climb into the mid 50s to lower
60s. Look for chilly conditions tonight with lows dropping into the
40s for coastal areas and 30s inland. These temperatures will be
hazardous to unsheltered or marginally sheltered populations.

Tuesday through Friday:

High pressure will dominate at the surface and aloft. This will
bring quiet and dry conditions with mild days and cool nights.

Next Weekend:

An upper trough will approach the region into this weekend bringing
a chance for showers. Otherwise seasonal temperatures will prevail
into early next week.

&&

.AVIATION...as of 4:07 AM PST Monday...For the 12Z TAFs.
Prevailing VFR conditions. Night satellite imagery shows mostly
clear skies, aside from some patchy stratus over the South Bay
hills and mountains around Monterey and San Benito. Some clouds
might reach the vicinity of KSJC/KMRY/KSNS but moderate to high
confidence in conditions remaining VFR. Light winds increasing
somewhat this afternoon, but generally AOB 15 kt, with light
northerly flow.

Mostly clear skies tonight with high clouds approaching near the
end of the TAF period. Low to moderate confidence in patchy fog
developing in the Sonoma Valleys late tonight as models are not
in good agreement.

Vicinity of KSFO...VFR at area terminals with low clouds in the
vicinity of KSJC. Otherwise, VFR likely to persist through the TAF
period. Moderate to breezy winds return this afternoon, peaking
around 15 kt at KSFO. Light winds overnight.

KSFO Bridge Approach...Similar to SFO.

Monterey Bay...VFR through the TAF period. Low clouds in the
surrounding hills are remaining just outside the vicinity of
KMRY/KSNS. Could see some clouds move over the terminals this
morning, but higher confidence in remaining VFR. Moderate NW
winds this afternoon, becoming light offshore overnight.

&&

.MARINE...as of 02:39 AM PST Monday...Strong northerly winds
today, diminishing slightly this afternoon, and more so tonight. A
large northwest swell has built into the waters, keeping
conditions hazardous for small craft as wave heights peak around
14 to 16 feet this morning. More moderate winds and seas expected
Tuesday, with another mid-period northwest swell arriving Tuesday
night.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .Tday...Frost Advisory...North Bay Interior Valleys until 9 AM
             SCA...Mry Bay until 9 AM
             SCA...Pt Arena to Pt Reyes 0-10 nm
             SCA...Pt Arena to Pigeon Pt 10-60 nm
             SCA...Pt Reyes to Pigeon Pt 0-10 nm
             SCA...Pigeon Pt to Pt Pinos 0-10 nm
             SCA...Pt Pinos to Pt Piedras Blancas 0-10 nm
             SCA...Pigeon Pt to Pt Piedras Blancas 10-60 nm

&&

$$

PUBLIC FORECAST: MM/SPM
AVIATION: Lorber
MARINE: Lorber

Visit us at www.weather.gov/sanfrancisco

Follow us on Facebook, Twitter, and YouTube at:
www.facebook.com/nwsbayarea
www.twitter.com/nwsbayarea
www.youtube.com/nwsbayarea


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