Thursday, July29, 2021
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Marine Weather and Tides
Mountain Gate, CA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:02AMSunset 8:29PM Thursday July 29, 2021 4:56 PM PDT (23:56 UTC) Moonrise 10:49PMMoonset 10:58AM Illumination 69% Phase: Waning Gibbous; Moon at 20 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 238 Pm Pdt Thu Jul 29 2021
.small craft advisory in effect until 9 pm pdt this evening...
.small craft advisory in effect from Friday afternoon through Friday evening...
Tonight..SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 30 kt.
Fri..SW winds 15 to 20 kt with gusts up to 30 kt.
Fri night..SW winds 15 to 20 kt with gusts up to 30 kt.
Sat..SW winds 10 to 15 kt with gusts up to 25 kt.
Sat night..SW winds 10 to 15 kt with gusts up to 25 kt.
Sun..SW winds 10 to 15 kt with gusts up to 25 kt.
Sun night..SW winds 10 to 15 kt.
Mon..SW winds 10 to 15 kt.
Tue..SW winds 10 to 15 kt.
PZZ500 238 Pm Pdt Thu Jul 29 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Predominately light winds today, with locally gusty winds in the outer waters north of point reyes. In addition, the afternoon seabreeze will bring gusty west to southwest winds from the golden gate gap towards angel island, san pablo bay, and the carquinez strait through at least the next couple of days. Otherwise, a moderate southerly swell will persist in the waters.


7 Day Forecast for Marine Location Near Alameda, CA
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location: 37.77, -122.34     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 292155 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 255 PM PDT Thu Jul 29 2021

SYNOPSIS. Seasonably warm weather continues into Friday before a slight cooling trend arrives Saturday through early next week. High pressure rebuilds over Southern California by the middle of next week with more inland warming while the marine layer will persist along the coast.

DISCUSSION. as of 2:55 PM PDT Thursday . Skies are mostly sunny this afternoon while a few high clouds pass over the region. Along the coast the marine layer is hugging area beaches with a current depth around 1200-1500 feet. Meanwhile over the Sierra moisture is increasing with numerous showers and t-storms across the crest and streaming northward. The ocean sea surface temps (SST) have trended upward the last few days as coastal upwelling has eased with light northwest winds. Current SST readings around 60 degrees has left the coast feeling muggier than normal and mild overnight lows even within the marine boundary layer. Temps this afternoon still running pretty hot inland with widespread 90s and even some lower 100s for the hottest interior valleys.

For tonight expect the marine layer to only push locally into the bay and coastal valleys given the shallow depth though onshore gradients remain moderate around 2.5 mb.

For Friday, still not expecting much overall change as seasonably hot weather will continue inland with mild to warm conditions near the coast and bays. Monsoonal moisture will still be abundant across the Sierra and Nevada as well as points northward but not expected to impact the Bay Area/Central Coast.

An incoming trough will approach late Friday night into Saturday. This should lead to a deepening marine layer and stronger onshore winds by Saturday afternoon and ultimately some slight cooling inland as upper 80s/lower 90s become more common versus upper 90s to lower 100s. This trough will bring increasing southwest wind flow aloft helping to push any residual monsoon moisture well east of the Bay Area and more east of the crest. In addition a better mixing profile and stronger winds aloft should help to keep Dixie Fire smoke from draining down the valley and into the Bay Area.

Weak troughing off the coast into early next week should keep temps near to slightly below normal with persistent marine layer and onshore winds. Building high pressure over SoCal by middle to end of next week will bring renewed inland warming but in general a pretty seasonable pattern as we head into August. As noted this morning many of todays record highs date back to 1977 which preceded the late July/early August lightning of that summer. No record heat waves on the horizon and not seeing any signals for lightning events at this time in the mid/long range as monsoonal pushes look to stay to our east.

AVIATION. as of 10:45 AM PDT Thursday . For the 18z TAFs. Typical midsummer pattern in effect with marine stratus along the coast and monsoonal air aloft. Generally, expect to see VFR today, with FEW- SCT at 15000-20000 feet through the afternoon. Winds generally light and terrain driven in the morning, becoming locally breezy onshore through the coastal gaps in the afternoon. For tonight, a compressed marine layer will bring similar patchy VLIFR- IFR level marine stratus cigs to coastally influenced terminals and lowering mid to high level FEW-SCT 10000-15000 ft cigs elsewhere. Similar pattern tomorrow.

Vicinity of KSFO . VFR through the TAF period. Winds remain mild until afternoon with peak winds from the Northwest around 15-20 kts. These winds look to last through that evening but back off into Thursday night. For tonight, patchy stratus deck returns with borderline MVFR/IFR SCT/BKN deck into mid morning Friday.

KSFO Bridge Approach . Similar to KSFO.

Monterey Bay . Winds remain weak and variable through the morning, before becoming onshore and slightly breezy in the afternoon. Winds weaken and stratus returns in the late evening and early night leading to IFR around the Monterey Bay overnight.

MARINE. as of 02:08 PM PDT Thursday . Generally light to locally moderate gusty northwest winds across the northern outer waters. Breezy to gusty west winds each afternoon and evening across the San Francisco Bay north of the Bay Bridge otherwise light northwest winds through Monday. A moderate period southerly swell will persist in the waters.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . SF Bay until 9 PM



PUBLIC FORECAST: RWW AVIATION: DRP MARINE: DRP

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 2 mi62 min W 8.9 G 9.9
AAMC1 - 9414750 - Alameda, CA 2 mi62 min W 7 G 8.9 67°F 69°F1013.3 hPa
OBXC1 2 mi68 min 64°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 3 mi62 min W 5.1 G 8 66°F 1012 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 3 mi62 min W 8 G 8.9 64°F 1013 hPa
LNDC1 4 mi62 min N 2.9 G 6 69°F 1012.9 hPa
PXSC1 4 mi62 min 65°F 65°F
FTPC1 - 9414290 - San Francisco, CA 7 mi62 min WSW 13 G 21 59°F 62°F1012.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi62 min SSW 14 G 19 62°F 1012.9 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 10 mi75 min WNW 4.1 70°F 1013 hPa
RCMC1 - 9414863 - Richmond, CA 11 mi62 min SSE 7 G 8.9 67°F 65°F1012.4 hPa
46237 - San Francisco Bar, CA (142) 16 mi56 min 60°F3 ft
RTYC1 - 9414523 - Redwood City, CA 19 mi62 min NNW 12 G 14 70°F 1013.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 20 mi62 min WSW 8.9 G 14 72°F 1011.2 hPa
CQUC1 21 mi73 min 69°F
UPBC1 22 mi62 min WNW 16 G 19
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi62 min WNW 16 G 18 81°F 69°F1011 hPa
PCOC1 - 9415144 - Port Chicago, CA 25 mi62 min WSW 15 G 18 81°F 72°F1010.7 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi46 min WSW 5.8 G 7.8 59°F1014.2 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 30 mi62 min NW 13 G 17 84°F 1010.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 34 mi71 min WNW 11 85°F 1011 hPa61°F
PRYC1 - 9415020 - Point Reyes, CA 37 mi62 min 58°F1014.1 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 41 mi46 min WNW 5.8 G 7.8 57°F 1014.2 hPa56°F

Wind History for Oakland Middle Harbor, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Redding Municipal Airport, CA18 mi63 minN 010.00 miSmoke107°F45°F12%1007.5 hPa

Link to 5 minute data for KOAK

Wind History from OAK (wind in knots)
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Last 24hrNW17NW15NW11NW11NW10NW11NW11NW11N8NW6NW8NW7N5NW5NW3CalmNW7NW8NW9NW10NW14W14NW12NW13
1 day agoW13NW14NW11NW9NW7NW6N4NW4NW4NW7N5NW6NW5N4NW6NW4W5W5W4NW7NW12NW12NW13NW15
2 days agoNW12NW11NW13NW11N7NW9N5N7NW3N6N5NW5CalmNW3N3CalmNW45NW8NW10NW10NW14NW13W14

Tide / Current Tables for Oakland Pier, San Francisco Bay, California
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Oakland Pier
Click for Map
Thu -- 04:18 AM PDT     5.00 feet High Tide
Thu -- 06:10 AM PDT     Sunrise
Thu -- 10:45 AM PDT     0.83 feet Low Tide
Thu -- 11:57 AM PDT     Moonset
Thu -- 05:30 PM PDT     5.61 feet High Tide
Thu -- 08:20 PM PDT     Sunset
Thu -- 11:51 PM PDT     Moonrise
Thu -- 11:52 PM PDT     2.01 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.53.23.94.654.94.43.52.51.510.81.223.14.155.55.65.14.33.42.62.1

Tide / Current Tables for Potrero Point 1.1 mi E, South San Francisco Bay, California Current
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Potrero Point 1.1 mi E
Click for Map
Thu -- 02:09 AM PDT     1.39 knots Max Flood
Thu -- 05:03 AM PDT     -0.00 knots Slack
Thu -- 06:10 AM PDT     Sunrise
Thu -- 07:59 AM PDT     -1.65 knots Max Ebb
Thu -- 11:27 AM PDT     0.00 knots Slack
Thu -- 11:57 AM PDT     Moonset
Thu -- 02:41 PM PDT     1.71 knots Max Flood
Thu -- 05:54 PM PDT     -0.00 knots Slack
Thu -- 08:20 PM PDT     Sunset
Thu -- 08:37 PM PDT     -1.44 knots Max Ebb
Thu -- 11:51 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.51.11.41.30.80.1-0.7-1.4-1.6-1.4-0.9-0.30.41.21.61.71.40.8-0.1-0.9-1.4-1.4-1.1-0.7

Weather Map
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GEOS Local Image of CentralWestCoast    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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