Sunrise 6:12 AM   Sunset 7:55 PM Moonrise 10:13 PM   Moonset 6:32 AM

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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 841 Pm Pdt Fri Apr 26 2024
.small craft advisory in effect until 3 am pdt Saturday - ..small craft advisory in effect from Saturday afternoon through Saturday evening - .
Today - NW winds 15 to 25 knots with gusts up to 30 knots. A slight chance of drizzle this afternoon. Tonight - W winds 15 to 20 knots with gusts up to 30 knots. Sat - W winds 10 to 15 knots. Sat night - W winds 15 to 20 knots with gusts up to 25 knots. Sun - W winds 10 to 15 knots. Sun night - W winds 10 to 20 knots with gusts up to 25 knots. Mon - W winds 15 to 20 knots with gusts up to 25 knots. Tue - W winds 10 to 15 knots.

PZZ500 841 Pm Pdt Fri Apr 26 2024
Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
strong northwesterly winds with gale force gusts are to be expected through the weekend, particularly over the coastal waters, creating hazardous conditions for small craft vessels. Moderate period northwesterly swell will continue to move through the waters through Wednesday.

FXUS66 KSTO 262008 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 108 PM PDT Fri Apr 26 2024

Synopsis
Mountain snow continues through the evening with thunderstorm chances today, highest over the foothills and mountains. Mild and warmer weather in store this weekend into early next week.

Discussion
Showers are ongoing over the foothills and Sierra and expected to continue through the afternoon. Ski resorts reported 1-4 inches of snowfall from yesterday above ~6800 feet, which was also supported via snow level radars and when looking at CCTV cameras along I-80 & Highway 50 this morning. An area of light precipitation allowed for 1-2 hours of light snowfall down to around 5,000 feet late morning today in the Blue Canyon area as temperatures were around 33-35 degrees. Temperatures have increased for elevations between 5000-6000 feet this afternoon, likely limiting snowfall potential again with additional shower activity in the mountains through this afternoon-evening.
Additional snowfall of 1-4 inches is possible today for higher elevations and mountain peaks, again mainly above 6000 feet.
Breezy winds associated with these showers this morning/early afternoon have been between 15-30 mph. Similar winds will continue to be possible with any shower/thunderstorm development through this evening. Impacts will continue to be minimal through today but be sure to be cautious if planning mountainous travel as roads may be slick.

Cumulus clouds have begun to develop/fill in across portions of the Valley early this afternoon, and even some isolated low-top showers have begun to pop-up. Latest hi-res forecast model runs shows continued scattered showers and isolated thunderstorms north of I-80 over the mountains and foothills through the afternoon. A few more isolated showers and thunderstorms from Yolo County to Stanislaus County this afternoon through the evening (~7pm PDT), where mesoanalysis is already indicating CAPE of around 250-500 J/kg has developed. Hires indicates unidirectional shear around 20-30 knots, with storm motions of 25-30 kts from the northwest and mean echo tops of generally 5-15 Kft, a few getting up to around 20 Kft. All of this to say, any thunderstorms that do develop should move quickly southeast and bring brief moderate to heavy rain, lightning, and winds to around 20-30 mph. Strongest storms may have small hail.

Shower and thunderstorms will diminish by 7-8pm this evening, leaving behind mostly dry conditions. Dry weather is expected through the weekend and into at least early next week as weak northerly flow overhead will transition to become more zonal. As a result, occasionally breezy (up to 15-25 mph) northerly winds are in the forecast, strongest in the north wind- prone areas through early next week as short waves move through WA/OR to our north.
//Peters

.EXTENDED DISCUSSION (Tuesday THROUGH Friday)...

Northwesterly flow over NorCal on Tuesday and Wednesday as short wave troughs remain north of our area, and ridging develops in the Pacific. High temperatures will climb into the low 80s for much of the Valley on Tuesday and Wednesday. Thursday and Friday, there is disagreement amongst the ensembles on what our upper level pattern looks like. Cluster analysis suggests around a 50/50 split among members of ridging developing over the area and a trough developing in the eastern Pacific. The NBM appears to be favoring the resolution suggesting weak troughing over the PacNW and brings a low chance (10-20%) of showers, mainly over the Shasta mountains, Thursday and Friday. High temperatures will be determined by which pattern manifests over the area, as there is currently a large spread on potential high temps Thursday and Friday by 10-13 degrees. Current forecast highs however remain close to climatological normal for this time of year, in the upper 70s to low 80s for the Valley and upper 50s to upper 60s for higher elevations.

AVIATION

Areas of MVFR/IFR conditions due to periods of showers, mountain snow showers, and isolated thunderstorms across portions of interior NorCal until around 03Z Saturday. Snow levels 5500-6500 feet. Otherwise, mainly VFR conditions are expected next 24 hours. Surface wind mainly at or below 12 kts except breezy southwest to west wind gusts up to 20-25 kts possible vicinity of Delta and N San Joaquin Valley, and northwest wind gusts vicinity N Sacramento Valley through 06z Saturday. Areas west to northwest surface wind gusts up to 30 kts possible over the mountains through 00Z Saturday.

STO WATCHES/WARNINGS/ADVISORIES
None.

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