Sunrise 5:41 AM   Sunset 8:26 PM Moonrise 1:38 AM   Moonset 2:16 PM

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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 900 Pm Pdt Sat Jun 1 2024
.small craft advisory in effect until 9 pm pdt this evening - ..small craft advisory in effect from Sunday afternoon through Sunday evening - .
Tonight - W wind 15 to 20 kt, becoming sw 10 to 15 kt after midnight. Waves around 2 ft or less. Sun - SW wind 5 to 10 kt, becoming W 10 to 15 kt in the afternoon. Waves around 2 ft or less. Sun night - W wind 10 to 15 kt. Waves around 2 ft or less. Mon - W wind 10 to 15 kt. Waves around 2 ft or less. Mon night - W wind 10 to 15 kt, easing to 5 to 10 kt after midnight. Waves around 2 ft or less. Tue - W wind 5 to 10 kt, rising to 10 to 15 kt in the afternoon. Waves around 2 ft or less. Tue night - W wind 10 to 15 kt, becoming sw 5 to 10 kt after midnight. Waves around 2 ft or less. Wed - SW wind 5 to 10 kt. Waves around 2 ft or less. Wed night - SW wind 10 to 15 kt, easing to 5 to 10 kt after midnight. Waves around 2 ft or less. Thu - SW wind 5 to 10 kt, rising to 10 to 15 kt in the afternoon. Waves around 2 ft or less. Thu night - SW wind 10 to 15 kt, easing to 5 to 10 kt after midnight. Waves around 2 ft or less.

PZZ500 900 Pm Pdt Sat Jun 1 2024
Synopsis for the central california coast and bays including the Monterey bay - Greater farallones - .and cordell bank national marine sanctuaries - .
buoys are no longer reporting gale force winds over portions of the northern waters this evening, however strong winds will continue through Sunday. Significant wave heights of up to 11 to 12 feet in the outer waters north of pigeon point continue overnight with 6 to 10 feet elsewhere over the open water. Seas begin to diminish towards the end of the weekend and into next week.

FXUS66 KSTO 012023 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 123 PM PDT Sat Jun 1 2024

SYNOPSIS
Slight cooldown through Monday before a significant warmup to widespread Major HeatRisk and triple digits in the Valley by mid- week. An Excessive Heat Watch remains in effect for the lower elevations from Tuesday morning until Thursday evening. Peak heat expected Wednesday. Slight chance of showers for the Coastal Range and northern monutains on Monday. Slight chance for late-day shower/thunderstorm over the Sierra Nevada Thursday-Saturday.

DISCUSSION

Discussion at a Glance:

- Cooler through Monday with periods of increased onshore flow and Delta Breeze.
- An Excessive Heat Watch remains in effect from Tuesday morning through Thursday evening across the Valley and adjacent foothills.
- Areas of Major HeatRisk Tuesday for the Valley, becoming widespread Wednesday & Thursday for the Valley & Foothills with widespread triple digit high temperatures. Prepare now for elevated daytime highs and overnight lows and reconsider outdoor activities during the hottest part of the day (3:00-7:00 PM).
- Moderate HeatRisk next Friday, with a few isolated spots of Major HeatRisk in the Valley; Triple digits in the Northern Sacramento Valley and adjacent Valley foothills with low to mid 90s in the Delta and Sacramento metro area - Slight chance of showers for the Coastal Range and northern mountains on Monday. Slight chance for late-day shower or thunderstorm over the Sierra Nevada Thursday-Saturday.

Short-Term Discussion (Today THROUGH Tuesday)...

Current GOES-West visible satellite imagery illustrates mostly sunny skies with just a few passing high level clouds and a few mountain cumulus over the southern Cascades and northern Sierra Nevada. Temperatures are currently trending approximately 2 to 12 degrees cooler than this time yesterday afternoon, valid at 1 PM PDT. This slight cooling is a result of upper level troughing over the region. These cooler temperatures will continue through Monday, with generally Minor HeatRisk, and areas of Moderate HeatRisk in portions of the northern and central Sacramento Valley. Periods of onshore flow will also aid in the cooler temperatures over this timeframe, with afternoon and evening gusts of 15 to 25 mph in the Delta area and adjacent Valley locations.

On Monday, a weather system will move through the Pacific Northwest. For interior northern California, we can expect slightly cooler temperatures, increased onshore flow, and increasing cloud cover. This system will also allow for slight chances for showers over portions of the Coast Range and northern mountains. There is a 15 to 35 percent probability of precipitation amounts of 0.10" or greater on Monday over those aforementioned locations, so overall little to no impacts are expected from any precipitation that falls. Dry conditions will continue elsewhere in the Valley, foothills, and Sierra Nevada.

Upper level ridging begins to build in on Tuesday, bringing along the start of a significant warming trend to interior NorCal. An Excessive Heat Watch remains in effect starting Tuesday morning.
On Tuesday, Major HeatRisk is in the forecast for much of the Valley and even into portions of the foothills. The probability for reaching or exceeding 100 degrees for the daytime high on Tuesday is 50 to 80 percent in the Valley. This significant warm- up will continue into the extended forecast period.

.EXTENDED DISCUSSION (Wednesday THROUGH Saturday)...

Ensemble guidance indicates that upper level ridging continues to build mid-week over the Western US, bringing along the potential for dangerously hot temperatures through at least Thursday.
Widespread Major HeatRisk is currently expected to impact the Valley and foothills on Wednesday and Thursday, with triple digit temperatures in the Valley and warm overnight low temperatures.
The Excessive Heat Watch remains in effect through Thursday evening to address the significant heat. Peak heat is currently projected to be on Wednesday. The National Blend of Models (NBM)
shows a 65 to 95 percent probability of 100 degree highs or greater in the Valley on Wednesday and Thursday, with a 30 to 70 percent probability in the lower foothills over the same timeframe.

By Friday, slightly cooler but still hot temperatures are in the forecast with Moderate HeatRisk, as ensemble guidance indicates the ridge shifting east. However, there is still some uncertainty with the details in the cluster analysis that is resulting in a larger spread of potential high temperatures for Friday and into next weekend. Late-day mountain shower and thunderstorm chances return to the Sierra Nevada as well, with generally a 10 to 20 percent probability over the High Sierra mainly south of Interstate 80 from Thursday through Saturday, in the afternoon and evening hours. Additionally, area waterways continue to run fast and cold from snowmelt, creating dangerous conditions for those seeking relief in rivers and lakes next week. Stay tuned for updates as we get closer and plan ahead now to practice heat and cold water safety!

To view the latest HeatRisk, please visit www.wpc.ncep.noaa.gov/heatrisk/

To view current water temperatures, please visit www.cnrfc.noaa.gov

AVIATION

VFR conditions expected over the next 24 hours. Sustained surface winds generally under 12 kts except wind gusts 15 to 25 kts in the Delta and into the southern Sacramento Valley and northern San Joaquin Valley until 06Z-12Z Sunday. Local northwesterly wind gusts up 20 kts in the northern Sacramento Valley after 00Z Sunday.

STO WATCHES/WARNINGS/ADVISORIES

Excessive Heat Watch from Tuesday morning through Thursday evening for Carquinez Strait and Delta-Central Sacramento Valley- Motherlode-Mountains Southwestern Shasta County to Western Colusa County-Northeast Foothills/Sacramento Valley-Northern Sacramento Valley-Northern San Joaquin Valley-Shasta Lake Area / Northern Shasta County-Southern Sacramento Valley.

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Sat -- 11:23 AM PDT     0.27 feet Low Tide
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