Wednesday, April21, 2021
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Marine Weather and Tides
Los Gatos, 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 7:49PM Wednesday April 21, 2021 3:36 AM PDT (10:36 UTC) Moonrise 12:46PMMoonset 2:31AM Illumination 70% 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 Los Gatos, CA
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location: 37.24, -121.95     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 210956 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 256 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 10:42 PM PDT Tuesday . For the 06Z TAFs. The scattered showers over the East Bay are slowly dissipating. Scattered drizzle is still being observed down the San Mateo coastline and around the Monterey Peninsula. Winds have finally reduced compared to this afternoon, but remain breezy. Cigs are mostly between 1000 and 1500 feet, with a few terminals varying just above or below that. However clouds remain patchy so terminals in the North Bay are VFR with MVFR over the SF Bay and south of that. Isolated IFR is possible over night, but more widespread MVFR is expected as winds continue to subside. Models are trending for a later clearing of clouds for a brief window of VFR conditions Wednesday afternoon with a much more traditional seabreeze expected. Clouds return Wednesday evening with models hinting at MVFR levels.

Vicinity of KSFO . Winds continue to move in onshore spilling stratus over the southern SF Bay. Cigs currently bouncing around between 1100 and 1400 feet for MVFR conditions. Possible periods of SCT clouds, but widespread OVC MVFR conditions expected overnight with breezy winds. Much for traditional seabreeze expected Wednesday afternoon around 15 kts. Cigs are expected to break up after 18Z, a little later, but VFR expected Wednesday afternoon. Winds subside Wednesday night with a return to MVFR conditions.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Cloud cover sitting over the terminals for IFR/MVFR conditions through the evening. Drizzle can still be expected closer to the coast into early Wednesday morning. Some clearing expected inland after 20Z, but coastal terminals will likely be socked in with MVFR cloud cover through the day. Widespread MVFR conditions return Wednesday night with a chance for IFR possible.

MARINE. as of 2:37 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
46269 22 mi66 min 50°F 53°F5 ft
RTYC1 - 9414523 - Redwood City, CA 23 mi48 min S 1 G 1.9 49°F 1011.2 hPa
ELXC1 - Elkhorn Slough Reserve, CA 31 mi111 min WSW 5.1 50°F 1015 hPa48°F
MLSC1 - Moss Landing, South Harbor, CA 31 mi40 min 55°F
46092 - MBM1 34 mi90 min W 7.8 50°F 51°F1011.9 hPa (-0.4)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 39 mi36 min NW 18 G 23 51°F 52°F1011.9 hPa47°F
AAMC1 - 9414750 - Alameda, CA 41 mi48 min SSE 5.1 G 8.9 51°F 62°F1011.1 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 42 mi40 min 54°F5 ft
LNDC1 42 mi48 min S 7 G 8.9 51°F 1010.6 hPa
46114 - West Monterey Bay, CA 43 mi70 min 52°F12 ft
MEYC1 44 mi60 min WSW 4.1 G 7 50°F 1012.6 hPa
OBXC1 44 mi48 min 51°F 50°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi48 min SSW 7 G 8.9 51°F 1010.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 44 mi48 min SSW 8.9 G 12
PXOC1 - 9414311 - San Francisco (Pier 1), CA 45 mi48 min SE 6 G 8.9 50°F 1009.5 hPa
PXSC1 46 mi48 min 52°F 52°F
FTPC1 - 9414290 - San Francisco, CA 48 mi48 min Calm G 6 49°F 55°F1010.7 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Jose, San Jose International Airport, CA9 mi43 minS 910.00 miFair51°F43°F74%1010.6 hPa
Watsonville, Watsonville Municipal Airport, CA22 mi43 minSSW 49.00 miOvercast50°F47°F89%1011.7 hPa

Link to 5 minute data for KSJC

Wind History from SJC (wind in knots)
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Last 24hrS4SE7S6S5S5S8S54CalmNW7NW10W15W14
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1 day agoN6N3N4N5N5CalmCalmNW66NW7N9NW10NW9NW11N14N9N7N9CalmNW5N4CalmCalmS4
2 days agoCalmCalmCalmCalmSE3CalmCalmCalmN5NW4NW7NW10NW13NW16N17N14NW7NW5N3NW5NW6W3CalmSW3

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
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Wed -- 03:32 AM PDT     Moonset
Wed -- 04:00 AM PDT     3.21 feet Low Tide
Wed -- 06:24 AM PDT     Sunrise
Wed -- 07:58 AM PDT     7.78 feet High Tide
Wed -- 01:45 PM PDT     Moonrise
Wed -- 04:16 PM PDT     0.09 feet Low Tide
Wed -- 07:49 PM PDT     Sunset
Wed -- 10:28 PM PDT     7.67 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.15.14.13.53.23.85.477.87.56.85.74.22.71.40.50.10.41.53.156.67.67.6

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Wed -- 01:18 AM PDT     -0.47 knots Max Ebb
Wed -- 03:32 AM PDT     Moonset
Wed -- 03:48 AM PDT     0.00 knots Slack
Wed -- 05:59 AM PDT     0.59 knots Max Flood
Wed -- 06:24 AM PDT     Sunrise
Wed -- 08:37 AM PDT     -0.00 knots Slack
Wed -- 01:23 PM PDT     -1.04 knots Max Ebb
Wed -- 01:46 PM PDT     Moonrise
Wed -- 04:13 PM PDT     0.01 knots Slack
Wed -- 07:07 PM PDT     1.21 knots Max Flood
Wed -- 07:49 PM PDT     Sunset
Wed -- 10:25 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.5-0.4-0.20.10.40.60.50.2-0.1-0.4-0.7-0.9-1-1-0.6-0.10.511.21.10.80.3-0.2

Weather Map
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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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