Sunrise 6:16 AM   Sunset 7:54 PM Moonrise 9:08 PM   Moonset 6:00 AM

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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 244 Am Pdt Thu Apr 25 2024
Today - NW winds 15 to 25 knots. Tonight - W winds 10 to 20 knots with gusts up to 30 knots. Fri - W winds 10 to 20 knots with gusts up to 25 knots. Fri night - W winds 10 to 20 knots with gusts up to 25 knots. Sat - W winds 10 to 15 knots. Sat night - W winds 10 to 15 knots. Sun - W winds 10 to 15 knots with gusts up to 25 knots. Mon - W winds 10 to 15 knots.

PZZ500 244 Am Pdt Thu Apr 25 2024
Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
moderate northwesterly winds persist through Friday morning with occasional fresh to strong gusts throughout portions of the coastal waters. Winds strengthen to become strong and gusty into Friday afternoon with gale-force gusts likely near the big sur coast. These strong and gusty northwesterly winds last through the weekend and into at least the early portion of next week, bringing hazardous conditions for small craft. Moderate period northwest swell will continue to move through the waters this weekend, with a new longer period northwest swell train entering the waters Sunday. Light, long period southerly swell continues through end of forecast period.

FXUS66 KSTO 250955 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 255 AM PDT Thu Apr 25 2024

Synopsis
Light rain and mountain snow this afternoon through Friday with thunderstorm chances today and tomorrow, and best chances over the foothills and mountains.

Discussion
Another quiet night across Northern California outside of some scattered cloud cover and breezy Delta winds. As of midnight, observations show gusts 15 to 25 MPH in the Delta area, slowly trickling down as the morning continues and returning in the afternoon. Ensembles show a trough dropping down from the northwest, moving into the Great Basin, that will bring precipitation across our forecast area today into Friday, highest over the mountains. Light sprinkles are possible across the Sierra and Southern Cascades with a heavier precipitation expected Thursday afternoon through Friday morning. Latest WPC QPF totals are 0.25-1.00" over the mountains, 0.10-0.50" over the foothills and 0.01-0.15" in the Valley, albeit dry over the Delta and portions of the Northern San Joaquin Valley. Thunderstorms will be possible this afternoon and evening (10-20% chance), primarily north of I-80 through the northeast foothills. Friday shows a better chance of thunderstorm development (15-30% chance), highest over the I-80 and Hwy.50 corridor over the Sierra.
Lightning, brief heavy rain, gusty winds, and small hail will be possible with any thunderstorms that develop.

Today's weak system will bring snowfall to the Sierra, but no moderate travel impacts are expected. Snow levels will be 7000 to 8000 feet initially, lowering to 5500 to 6500 feet by Friday late morning. Totals will only amount to a few inches, up to 8-10 inches along mountain peaks above 7000 feet. NBM probabilities point to a lower snow totals with probabilities of 4 inches or more only being 10-25% south of Hwy. 50 and less than 10% elsewhere. Heaviest snowfall will be late Friday morning before tapering off throughout the afternoon.

By Saturday, weak ridging develops over NorCal that will quiet any lingering precipitation and warm afternoon Valley highs to the mid to upper 70s and upper 40s to 60s across the mountains and foothills respectively.

.EXTENDED DISCUSSION (Monday THROUGH Thursday)...

Progs suggesting enough ridging in place over interior NorCal Monday and Tuesday to keep short wave troughs north of the CWA
Cluster analysis showing broader divergence in solutions beyond Tuesday leading to increased forecast uncertainty midweek. EC now maintaining more ridging in place resulting in continued dry conditions, while GFS supports deeper troughing with potential for mountain precip Wednesday night into Thursday. NBM leans toward the GFS with POPs and forecasts above normal high temperatures Monday into Wednesday, then below normal Thursday.

AVIATION
Pac storm will bring a threat of showers, higher elevation mtn snow showers and slight chance of thunderstorms next 24 hrs.
Mainly VFR conditions thru 12z Fri except areas MVFR/IFR conditions possible over the mtns in precip. Snow levels above 7000 ft lowering to 5000-6000 ft Fri AM. In Central Vly, sfc wind mainly below 12 kts til 21z Thu, then areas Sly sfc wind 15-20 kts. Vcnty Delta, SWly sfc wind 15-25 kts. Over mtns, areas Wly sfc wind gusts up to 30 kts possible aft 18z Thu.

STO WATCHES/WARNINGS/ADVISORIES
None.

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Mallard Island Ferry Wharf
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Thu -- 03:34 AM PDT     4.36 feet High Tide
Thu -- 06:17 AM PDT     Sunrise
Thu -- 07:00 AM PDT     Moonset
Thu -- 11:25 AM PDT     -0.15 feet Low Tide
Thu -- 05:48 PM PDT     2.95 feet High Tide
Thu -- 07:53 PM PDT     Sunset
Thu -- 10:07 PM PDT     Moonrise
Thu -- 10:26 PM PDT     1.55 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Mallard Island Ferry Wharf, Suisun Bay, California, Tide feet

Stake Point .9 Mi NNW
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Thu -- 02:00 AM PDT     0.93 knots Max Flood
Thu -- 04:46 AM PDT     -0.00 knots Slack
Thu -- 06:18 AM PDT     Sunrise
Thu -- 07:00 AM PDT     Moonset
Thu -- 08:09 AM PDT     -0.89 knots Max Ebb
Thu -- 12:19 PM PDT     0.00 knots Slack
Thu -- 03:53 PM PDT     0.63 knots Max Flood
Thu -- 07:05 PM PDT     -0.00 knots Slack
Thu -- 07:53 PM PDT     Sunset
Thu -- 08:53 PM PDT     -0.26 knots Max Ebb
Thu -- 10:07 PM PDT     Moonrise
Thu -- 10:48 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION

Stake Point .9 Mi NNW, Suisun Bay, California Current, knots

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