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PZZ531 San Francisco Bay South Of The Bay Bridge- 255 Pm Pst Thu Nov 30 2023
.small craft advisory in effect until 9 pm pst this evening...
This afternoon..W winds 15 to 25 knots with gusts up to 30 knots.
Tonight..NW winds 15 to 25 knots with gusts up to 30 knots.
Fri..NW winds 10 to 20 knots with gusts up to 25 knots.
Fri night..W winds 10 to 15 knots with gusts up to 25 knots. Patchy fog.
Sat..SW winds around 5 knots. Areas of fog. A slight chance of rain.
Sat night..SW winds around 5 knots. Patchy fog.
Sun..NW winds 5 to 10 knots. Areas of fog.
Mon..N winds around 5 knots. Areas of fog.

PZZ500 255 Pm Pst Thu Nov 30 2023
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries...
moderate to strong winds are expected to persist through late Friday into early Saturday. NEar gale force winds, with the potential for isolated stronger gusts, are expected in the inner southern coastal waters near point sur through Friday afternoon. Stronger winds are also possible in the san francisco bay, delta, and Monterey bay from Thursday afternoon to early Friday morning with increased potential for coastal jet development in these regions. Winds are expected to weaken starting late Friday across the northern waters and into early to mid Saturday across the southern waters. Northwest swell persists through the weekend with a second larger, moderate period northwest swell arriving Friday afternoon. Unsettled weather conditions will remain through the weekend with the highest precipitation chances across the northern waters.

FXUS66 KSTO 302115 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 115 PM PST Thu Nov 30 2023

Synopsis
Precipitation chances linger through the end of the week into the early weekend. Quieter weather and a gradual warming trend are then expected late weekend into early next week.

Discussion
Longwave troughing aloft continues to dominate the upper level pattern for interior NorCal today. Partly to mostly cloudy skies are evident via latest GOES- West satellite imagery as of early this afternoon as a result. High temperatures remain on track to reach normal values by this afternoon despite the cloud cover. A quick moving system is already bringing increasing precipitation to portions of northern California and will continue to spread precipitation chances east and southward throughout the day and into the evening and overnight hours. Best chances for accumulating precipitation look to remain over the mountains of the Coastal Range, southern Cascades, and portions of the Sierra.
Probabilities for exceeding 4" of snowfall along the Sierra are in the 40 to 60% range, with a 20 to 40% chance of exceeding 2" of snowfall along areas of the southern Cascades. Elsewhere, primarily throughout Shasta and Tehama counties, probabilities of exceeding 0.25" of rainfall are in the 20 to 40% range. These precipitation chances will follow the trajectory of the attendant shortwave and as such, look to taper off moving into the day on Friday. Furthermore, as an area of clearing works into the region overnight, cold early morning temperatures are expected, with a 20 to 40% chance of temperatures below 32F in the central Sacramento Valley and a 50 to 70% chance across the northern Sacramento Valley.

As the flow pattern aloft remains generally northwesterly into interior NorCal, chances for light precipitation will persist into the early weekend as another shortwave moves through. Given the upper level flow pattern, the best chances for accumulating precipitation look to remain confined to the Coastal Range and attendant portions of the northern Sacramento Valley. This will likely result in more isolated shower activity than anything, with a 40 to 70% chance of exceeding 0.25" of precipitation with this system in these areas from Friday evening into Saturday.

Upper level ridging will then begin to push the longwave troughing eastward late weekend into early next week. This will result in quieter weather from Sunday into Monday alongside a gradual warming trend. High temperatures rebound into the low to mid 60s by Monday afternoon throughout the Valley, with 50s anticipated in the mountains.

.EXTENDED DISCUSSION (Monday THROUGH Thursday)...

As upper level ridging persists across the early week period, the quiet and warm weather pattern will prevail into Tuesday and partially into Wednesday. High temperatures in the Valley look to breach the mid 60s both days, with mid to upper 50s in the mountains. By mid to late week, the upper ridge is expected to transition eastward toward the central US as an upper trough digs down from the Gulf of Alaska over the Eastern Pacific. This will result in a southwesterly flow setup over interior NorCal during this time frame. This flow pattern will be conducive for periodic shortwaves to bring precipitation chances to at least portions of the forecast area with temperatures falling as this occurs.

AVIATION

VFR conditions are expected to continue for the next 24 hours except widespread MVFR/IFR over the northern Sierra with snow showers (thru about 06Z Friday). Some MVFR haze possible across the northern San Joaquin Valley Friday morning depending on how fast skies clear out behind system that moves across tonight. Surface wind gusts generally below 12 kts.

STO WATCHES/WARNINGS/ADVISORIES
None.

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Grant Line Canal (drawbridge)
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Thu -- 04:38 AM PST     -0.35 feet Low Tide
Thu -- 07:01 AM PST     Sunrise
Thu -- 10:26 AM PST     Moonset
Thu -- 11:07 AM PST     3.02 feet High Tide
Thu -- 03:52 PM PST     1.59 feet Low Tide
Thu -- 04:47 PM PST     Sunset
Thu -- 07:42 PM PST     Moonrise
Thu -- 08:59 PM PST     3.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Grant Line Canal (drawbridge), Old River, California, Tide feet

Brandt Bridge
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Thu -- 12:55 AM PST     -1.27 knots Max Ebb
Thu -- 05:36 AM PST     0.00 knots Slack
Thu -- 07:01 AM PST     Sunrise
Thu -- 08:47 AM PST     0.57 knots Max Flood
Thu -- 10:26 AM PST     Moonset
Thu -- 11:41 AM PST     -0.00 knots Slack
Thu -- 02:04 PM PST     -0.31 knots Max Ebb
Thu -- 04:13 PM PST     0.00 knots Slack
Thu -- 04:46 PM PST     Sunset
Thu -- 06:51 PM PST     0.61 knots Max Flood
Thu -- 07:42 PM PST     Moonrise
Thu -- 09:14 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Brandt Bridge, San Joaquin River, California Current, knots

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Sacramento, CA,