Wednesday, April21, 2021
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Marine Weather and Tides
Pescadero, CA

Version 3.4
NOTICE
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 6:23AMSunset 7:50PM Wednesday April 21, 2021 4:54 AM PDT (11:54 UTC) Moonrise 12:48PMMoonset 2:33AM Illumination 71% Phase: Waxing Gibbous; Moon at 9 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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PZZ560 Coastal Waters From Pigeon Point To Point Pinos California Out To 10 Nm- 237 Am Pdt Wed Apr 21 2021
.small craft advisory in effect until 9 am pdt this morning...
Today..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 8 to 10 ft at 11 seconds.
Tonight..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 7 to 9 ft at 11 seconds.
Thu..SW winds up to 10 kt. Wind waves 1 to 2 ft. NW swell 6 to 8 ft at 10 seconds.
Thu night..W winds up to 10 kt. Wind waves 1 to 2 ft. NW swell 5 to 6 ft at 10 seconds.
Fri..SW winds up to 10 kt. Wind waves 1 ft. NW swell 5 to 7 ft at 9 seconds.
Fri night..W winds 5 to 15 kt. Wind waves 1 to 2 ft. Mixed swell nw 3 to 5 ft at 9 seconds and S 2 to 3 ft at 20 seconds.
Sat..W winds up to 10 kt. Wind waves 1 ft. Mixed swell W 2 to 4 ft and S 2 to 3 ft.
Sun..SW winds 5 to 15 kt. Wind waves 1 ft. W swell 4 to 6 ft and S 2 to 3 ft. Rain likely.
PZZ500 237 Am Pdt Wed Apr 21 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong winds with gale force gusts continue over the northern outer waters creating fresh steep wind waves resulting in hazardous seas particularly for smaller vessels. Winds remain moderately strong elsewhere and gradually diminish with seas remaining hazardous for smaller vessels on Wednesday. A moderate northwest swell continues through the week. Chance for rain this coming weekend.


7 Day Forecast for Marine Location Near Pescadero, CA
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location: 37.18, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 211135 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 435 AM PDT Wed Apr 21 2021

SYNOPSIS. Dry and seasonal weather returns Wednesday through Friday. Increasing clouds Saturday leading to a chance of rain Sunday. Lingering showers early Monday otherwise dry with a warming trend into the middle of next week.

DISCUSSION. as of 2:56 AM PDT Wednesday . Well defined upper low is now centered near Yosemite with any associated showers staying over the Sierra today. For the Bay Area the upper low has deepened the marine stratus with low clouds covering much of San Mateo and Santa Cruz county as well as the Central Coast. Drier northerly winds around the upper low has brought much drier air into the North Bay with mostly clear skies. The drier northerly winds will bring the most noted warming to the North Bay where 70s and lower 80s will be most likely to occur. Onshore winds for SF and the Central Coast will keep coastal areas mostly cloudy and cooler while 70s will return for the interior valleys of the East and South Bay after some cool temps on Tuesday.

For Thursday and Friday high pressure aloft will build bringing a dry and seasonal weather pattern. Onshore winds will keep a well defined marine layer in place along the coast with night and morning intrusions of low clouds and fog. Afternoon highs 60s coast with mainly 70s inland for the end of the work week.

Saturday will be a transition day as stronger onshore winds will ramp up ahead of incoming cold front. Look for increasing clouds and a cooling trend for Saturday afternoon.

Cold front and associated rainfall is still on track for Sunday. Still far enough out that timing could change but current model solutions suggest we'll see some rain for the North Bay as early as Sunday morning. Rain to spread north to south on Sunday, at a fairly good clip with steady rains associated with the surface cold front. Enough instability for plenty of post-frontal showers in northwest wind flow. Will have to assess t-storm potential in the coming days but for now those have been left out of the forecast. Latest qpf forecasts have trended down slightly but still above average confidence for a soaking rain. Bay Area rainfall estimates still on the order of 0.25-0.50 for most locations with higher potential coastal hills and lower amounts interior valleys. This is supported by model ensembles with deterministic and 50 member averages showing similar rainfall numbers.

A new drought monitor will be released later this week and the trends will be for more adverse drought impacts across the region and state. This storm will have little overall impact on the long term drought. However, confidence is increasing that most of the Bay Area will see soaking rains Sunday into early Monday. At the very least this will put a pause into the onset of fire season as fuel moisture readings are trending towards historically dry values. So from an impacts stand point this will bring beneficial rains and if the current timing holds up the roadway impacts would be mostly confined to Sunday traffic. For weekend planning, Saturday will be the better day for outdoor plans. Snow levels will be dropping in the Sierra so trans-Sierra passes will be impacted by snow for return travel later Sunday into Monday. All locations will notice cooler daytime highs Sunday into Monday.

Any lingering showers Monday should end early though official forecast will hold onto some low precip chances into Monday evening. Drying and modest warming trend Tuesday into Weds of next week as high pressure builds and the main storm track shifts north of the Bay Area.

AVIATION. As of 04:35 AM PDT Wednesday . For the 12Z TAFs. Clear skies and VFR inland, while terminals near the San Francisco and Monterey Bays are MVFR. As the low pressure system moves southeast, expected winds to become lighter with a later clearing for stratus to return to the ocean. VFR expected Wednesday afternoon, before an increasingly widespread return of MVFR cigs for much of the Bay Area.

Vicinity of KSFO . Typical MVFR stratus day forecast for KSFO. Cigs are just above 1000 ft. A FEW just below that level may pass over the terminal, but not expecting IFR for Wednesday morning at this time. With lighter winds, models leaning toward a later clearing compared to yesterday, after 18Z. Onshore seabreeze between 15 to 20 kts this afternoon as stratus retreats to the ocean for VFR conditions. As winds decrease Wednesday evening, stratus returns to the Bay and to the terminal through the end of the TAF period.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . KMRY and KSNS continue to play hopscotch above and below the 1000 ft threshold for IFR and MVFR status Wednesday morning. There are also occasional reports of drizzle on observation stations, but not frequent enough to put back in the TAF. Similar to yesterday, coastal terminals like KMRY are forecast to have cloud cover through Wednesday at MVFR levels, with inland terminals like KSNS getting a brief window of VFR before returning to MVFR Wednesday evening with another chance for IFR. Winds will be reduce compared to Tuesday, but a traditional seabreeze expected Wednesday afternoon before diminishing at night.

MARINE. as of 02:37 AM PDT Wednesday . Strong winds with gale force gusts continue over the northern outer waters creating fresh steep wind waves resulting in hazardous seas particularly for smaller vessels. Winds remain moderately strong elsewhere and gradually diminish with seas remaining hazardous for smaller vessels on Wednesday. A moderate northwest swell continues through the week. Chance for rain this coming weekend.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pigeon Pt to Pt Pinos 0-10 nm until 9 AM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 9 AM GLW . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm until 3 PM SCA . SF Bay from 3 PM



PUBLIC FORECAST: RWW AVIATION: DK MARINE: DK

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 24 mi61 min S 2.9 G 5.1 49°F 1011.4 hPa
46269 25 mi55 min 50°F 53°F6 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 27 mi45 min NW 18 G 21 51°F 52°F1012.1 hPa48°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi45 min NW 18 G 21 49°F 1011.9 hPa47°F
46114 - West Monterey Bay, CA 33 mi89 min 52°F13 ft
46092 - MBM1 35 mi109 min W 7.8 50°F 51°F1011.4 hPa (-0.6)
MLSC1 - Moss Landing, South Harbor, CA 41 mi39 min 56°F
AAMC1 - 9414750 - Alameda, CA 41 mi61 min S 4.1 G 7 51°F 62°F1010.8 hPa
PXSC1 43 mi61 min 51°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 43 mi61 min SE 6 G 8 50°F 1009.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 43 mi61 min SW 8.9 G 12
OBXC1 43 mi61 min 51°F 50°F
FTPC1 - 9414290 - San Francisco, CA 43 mi61 min SW 5.1 G 8 49°F 55°F1010.3 hPa
LNDC1 43 mi61 min S 8 G 9.9 51°F 1010.4 hPa
ELXC1 - Elkhorn Slough Reserve, CA 43 mi70 min SW 5.1 50°F 1014 hPa48°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi61 min SW 6 G 8.9 50°F 1010.5 hPa
46237 - San Francisco Bar, CA (142) 44 mi55 min 53°F8 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi45 min NW 14 G 19 49°F1011 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 46 mi59 min 53°F6 ft
MEYC1 48 mi79 min WSW 5.1 G 8 49°F 1012.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 49 mi74 min SE 5.1 49°F 1010 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA24 mi60 minN 03.00 miFog/Mist48°F46°F94%1011.5 hPa

Link to 5 minute data for KHAF

Wind History from HAF (wind in knots)
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Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
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Wed -- 12:29 AM PDT     2.93 feet Low Tide
Wed -- 03:32 AM PDT     Moonset
Wed -- 05:26 AM PDT     3.99 feet High Tide
Wed -- 06:26 AM PDT     Sunrise
Wed -- 12:45 PM PDT     -0.01 feet Low Tide
Wed -- 01:48 PM PDT     Moonrise
Wed -- 07:50 PM PDT     Sunset
Wed -- 07:56 PM PDT     3.92 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.933.13.43.843.93.632.11.30.50.1-00.30.91.62.53.23.73.93.83.43

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
Click for Map
Wed -- 12:43 AM PDT     3.03 feet Low Tide
Wed -- 03:34 AM PDT     Moonset
Wed -- 05:44 AM PDT     4.39 feet High Tide
Wed -- 06:26 AM PDT     Sunrise
Wed -- 12:59 PM PDT     0.09 feet Low Tide
Wed -- 01:47 PM PDT     Moonrise
Wed -- 07:51 PM PDT     Sunset
Wed -- 08:14 PM PDT     4.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.133.23.644.34.44.13.52.61.70.80.30.10.30.91.62.53.444.34.23.93.4

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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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