Saturday, July24, 2021
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Marine Weather and Tides
North Fair Oaks, 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 6:05AMSunset 8:24PM Saturday July 24, 2021 1:35 PM PDT (20:35 UTC) Moonrise 8:25PMMoonset 5:30AM Illumination 100% Phase: Full Moon; Moon at 15 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 851 Am Pdt Sat Jul 24 2021
Today..NW winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 25 kt this afternoon.
Tonight..NW winds 10 to 15 kt with gusts up to 25 kt.
Sun..NW winds 10 to 15 kt.
Sun night..NW winds 10 to 15 kt.
Mon..NW winds 10 to 15 kt.
Mon night..NW winds 10 to 15 kt.
Tue..W winds 5 to 10 kt.
Wed..W winds 10 to 15 kt.
PZZ500 851 Am Pdt Sat Jul 24 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwesterly winds will continue to diminish this weekend, but gusty winds are still expected at times over the northern outer waters. The afternoons and the early evenings will see strong gusts funnel through the golden gate into san francisco bay. These strong gusts will generate steep waves resulting in hazardous seas conditions, particularly for smaller vessels. Despite winds diminishing, the seas state will be predominantly wind driven with a period of about 7 to 9 seconds. Light southerly swell persists through the weekend.


7 Day Forecast for Marine Location Near North Fair Oaks, CA
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location: 37.47, -122.18     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 242006 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 106 PM PDT Sat Jul 24 2021

SYNOPSIS. Seasonable weather conditions will persist into Sunday. Monsoon moisture rotating out of the Desert Southwest will spread some high clouds and low end potential for showers and isolated thunderstorms across the region from Monday into Tuesday. Long range trends remain seasonably warm and dry through the end of the month.

DISCUSSION. as of 01:05 PM PDT Saturday . A well-defined marine layer sitting at around 1500- 1800 feet in depth persists along the coast this afternoon with temperatures generally in the upper 50s to mid 60s. Given that the marine layer has not compressed as previously expected, onshore flow has spread the marine influences well inland with temperatures running a few degrees cooler compared to 24 hours ago. That said, once away from the marine influence, temperatures across the interior have already warmed into the 70s and 80s with the typical hot spots already in the low/mid 90s. This onshore flow is likely to with low clouds spreading back inland late this evening and into Sunday morning. Look for temperatures to also trend a few degrees cooler for Sunday afternoon in response to the onshore flow and increase in higher level clouds.

The increase in mid/upper level moisture responsible for increased cloud cover aloft will continue to rotate clockwise around high pressure over the Desert Southwest into early next week. Deterministic and ensemble guidance are in good agreement with monsoon moisture increasing further on Monday. In addition, an inverted trough is expected to lift northward over the Central Coast and Bay Area from midday Monday into early Tuesday morning. This feature looks to combine with anomalously high PWAT values (1.25- 1.50" perhaps even up to 1.80") to produce a chance of high-based showers and/or thunderstorms during this timeframe. Initially, the first band of moisture may produce convection over the Pacific and then North Bay earlier on Monday before deeper moisture advects into the region Monday afternoon into early Tuesday morning. It is at this time more widespread showers will be possible with the potential for increased instability. Given this setup, any convection that does develop would be more likely to be accompanied by precipitation able to reach the surface. Therefore, the potential for dry lightning lessens given the much deeper vertical extend of the moisture profile. That said, high-based thunderstorms can result in lightning strikes well away from any wetting rainfall. All this said, the forecast remains complicated with low to moderate confidence in the development of convection across our region. As mentioned earlier: "The Sierra Nevada will also likely see numerous more lightning strikes, and with the ongoing large wildfires there, and very dry fuels across our interior; it is important we do our parts to prevent further wildfire starts, lightning or not."

The aforementioned monsoon moisture is forecast to continue to move northward during the day on Tuesday with diminishing chances of rain showers and/or thunderstorms. High pressure and the marine layer will return to being the dominate features impacting our region through the remainder of next week. Thus, look for cooler conditions near the coast with the typical ebb and flow of marine stratus while interior areas remain warm and dry. Be sure to stay up-to-date via social media and forecast discussions as we progress through the weekend as details will likely evolve.

AVIATION. as of 11:02 AM PDT Saturday . For the 18Z TAFs. Cigs are rapidly lifting as the July sun warms up the near-shore interface this morning, with lingering stratus being observed along the Monterey and SF Peninsulas. The latest coastal profile obs signal little change in the overall depth of the marine boundary layer (1500-1900ft) and the onshore gradient remains similar to what was observed this time yesterday so have only made minimal adjustments to wind speeds for this afternoon. As such, expect another return of the sea breeze across the coastal and bay terminals, with nnw 15-20kt sustained winds along the gaps and passes. Low cigs (MVFR/IFR/LIFR) will then return to the coastal terminals tonight and through tomorrow morning, with far inland terminals (SJC/LVK) observing relatively clearer skies and North Bay terminals (APC/STS) observing some early morning fog.

Vicinity of KSFO . Rinse and repeat. VFR cigs and breezy winds will dominate the afternoon environment as gap-enhanced flow introduces 15-20kt winds to the terminal. Winds will gradually weaken after sunset and stratus will gradually return to OAK starting around 6Z before eventually circling the Bay Shoreline. Given the moderate onshore flow, most of the stratus will likely obscure the surrounding vicinity but have added TEMPO to account for some of the stratus shrouding SFO overnight. Skies will then clear starting around 16-17Z.

KSFO Bridge Approach . Low clouds will cover the approach overnight and should begin to scatter around 16z-17z tomorrow.

Monterey Bay . A 1900-2000ft marine boundary layer continues to dominate the Monterey Bay interface, resulting in late-morning mix-outs at SNS/MRY and lingering stratus along the immediate coast and Monterey Peninsula. Similar to yesterday, will observe a brief VFR period this afternoon before the onshore flow and coastal regulation promotes the return of the stratus starting around 2-3Z. Will once again observe overnight IFR/LIFR cigs with patchy -BR along the immediate coastal terminals. Skies will then begin to clear out over the northern Salinas Valley by 17Z while lingering stratus will once again shroud the MRY vicinity through the end of the TAF period.

MARINE. as of 10:39 AM PDT Saturday . Northwesterly winds will continue to diminish this weekend, but gusty winds are still expected at times over the northern outer waters. The afternoons and the early evenings will see strong gusts funnel through the Golden Gate into San Francisco Bay. These strong gusts will generate steep waves resulting in hazardous seas conditions, particularly for smaller vessels. Despite winds diminishing, the seas state will be predominantly wind driven with a period of about 7 to 9 seconds. Light southerly swell persists through the weekend.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pigeon Pt 10-60 nm from 9 PM SCA . SF Bay until 9 PM



PUBLIC FORECAST: RGass AVIATION: Diaz MARINE: RGass

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 3 mi48 min N 6 G 8 66°F 1016.3 hPa
AAMC1 - 9414750 - Alameda, CA 22 mi48 min W 6 G 8.9 61°F 67°F1016.2 hPa
LNDC1 23 mi48 min NNW 7 G 9.9 62°F 1015.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 24 mi48 min W 7 G 9.9
OBXC1 25 mi48 min 59°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 25 mi48 min SW 5.1 G 12 61°F 1015.1 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 25 mi48 min NW 8.9 G 11 59°F 1016 hPa
PXSC1 26 mi48 min 61°F 61°F
FTPC1 - 9414290 - San Francisco, CA 28 mi48 min W 5.1 G 13 57°F 62°F1016.1 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 32 mi55 min SSW 4.1 61°F 1016 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 32 mi48 min SSW 18 G 23 57°F 1016 hPa
46237 - San Francisco Bar, CA (142) 33 mi66 min 58°F3 ft
RCMC1 - 9414863 - Richmond, CA 34 mi54 min S 7 G 9.9 60°F 65°F1015.9 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 38 mi36 min SSW 5.8 G 5.8 55°F 1017 hPa53°F
46269 38 mi66 min 55°F 60°F2 ft
MZXC1 - 9415102 - Martinez-Amorco CA 39 mi48 min WNW 20 G 23 70°F 69°F1014 hPa
UPBC1 39 mi48 min WNW 15 G 20
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 40 mi36 min S 7.8 G 12 1016.9 hPa (-0.4)
PCOC1 - 9415144 - Port Chicago, CA 41 mi48 min W 18 G 21 70°F 71°F1013.9 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 41 mi48 min WSW 11 G 15 64°F 1014.7 hPa
CQUC1 41 mi47 min 68°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 42 mi48 min NW 16 G 21 72°F 1013.2 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi36 min Calm G 3.9 57°F 1017.2 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA3 mi49 minNNE 910.00 miClear70°F57°F64%1015.6 hPa
San Carlos Airport, CA6 mi46 minN 910.00 miClear68°F59°F73%1015.6 hPa
Mountain View, Moffett Field, CA7 mi41 minN 810.00 miFair72°F55°F57%1015.2 hPa
Hayward, Hayward Air Terminal, CA14 mi42 minW 810.00 miFair72°F55°F55%1016.1 hPa
San Francisco, San Francisco International Airport, CA14 mi1.7 hrsNNE 810.00 miA Few Clouds64°F55°F73%1015.9 hPa
San Jose, San Jose International Airport, CA15 mi43 minNNW 710.00 miPartly Cloudy78°F56°F47%1014.7 hPa
Oakland, Metro Oakland International Airport, CA16 mi43 minWNW 1310.00 miPartly Cloudy67°F55°F66%1015.6 hPa
San Jose / Reid / Hillv, CA21 mi49 minN 010.00 miClear81°F54°F39%1014.9 hPa

Link to 5 minute data for KPAO

Wind History from PAO (wind in knots)
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Last 24hrN10N11N12N14NW13N11N10N9------------------CalmCalmCalm6N7N7N9
1 day ago--N17N17NW16N14--NW8N6------------------CalmCalmCalm----N7N9
2 days ago--N16N14--N15N15N14N10--------------------------------

Tide / Current Tables for Redwood City, Wharf 5, California (3)
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Redwood City
Click for Map
Sat -- 12:31 AM PDT     9.19 feet High Tide
Sat -- 06:06 AM PDT     Sunrise
Sat -- 06:29 AM PDT     Moonset
Sat -- 07:59 AM PDT     -1.31 feet Low Tide
Sat -- 02:41 PM PDT     7.35 feet High Tide
Sat -- 07:48 PM PDT     2.83 feet Low Tide
Sat -- 08:23 PM PDT     Sunset
Sat -- 09:25 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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99.18.36.74.52.20.3-0.9-1.3-0.80.52.34.267.17.36.65.343.12.83.54.86.5

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Sat -- 01:51 AM PDT     -0.00 knots Slack
Sat -- 05:04 AM PDT     -2.09 knots Max Ebb
Sat -- 06:06 AM PDT     Sunrise
Sat -- 06:29 AM PDT     Moonset
Sat -- 08:37 AM PDT     0.00 knots Slack
Sat -- 11:56 AM PDT     2.12 knots Max Flood
Sat -- 03:44 PM PDT     -0.00 knots Slack
Sat -- 05:47 PM PDT     -0.80 knots Max Ebb
Sat -- 08:17 PM PDT     0.00 knots Slack
Sat -- 08:23 PM PDT     Sunset
Sat -- 09:25 PM PDT     Moonrise
Sat -- 11:29 PM PDT     1.62 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.30.7-0.1-1.1-1.8-2.1-1.9-1.4-0.60.41.422.11.91.40.6-0.2-0.7-0.8-0.6-0.20.51.21.6

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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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