Monday, April19, 2021
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Marine Weather and Tides
Mill Valley, 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 6:26AMSunset 7:51PM Monday April 19, 2021 2:03 PM PDT (21:03 UTC) Moonrise 10:40AMMoonset 1:09AM Illumination 54% Phase: First Quarter Moon; Moon at 8 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- 848 Am Pdt Mon Apr 19 2021
Today..S winds 5 to 10 kt, becoming sw 10 to 20 kt with gusts up to 25 kt this afternoon.
Tonight..SW winds 10 to 20 kt with gusts up to 25 kt.
Tue..W winds 5 to 15 kt with gusts up to 25 kt.
Tue night..SW winds 5 to 10 kt.
Wed..SW winds 10 to 20 kt with gusts up to 25 kt.
Wed night..SW winds 5 to 15 kt.
Thu..SW winds 5 to 15 kt.
Fri..SW winds 5 to 15 kt.
PZZ500 848 Am Pdt Mon Apr 19 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will increase through the day as a disturbance moves southward from the pacific northwest into northern california. Gale force gusts are expected to develop over portions of the coastal waters starting with the big sur coast by late this afternoon before winds increase over the northern waters this evening and persist into Tuesday. These winds will produce steep wind waves resulting in hazardous seas conditions, particularly for smaller vessels. Moderate northwest swell through the period along with a lighter longer period southerly swell.


7 Day Forecast for Marine Location Near Mill Valley, CA
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location: 37.91, -122.54     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 191847 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1147 AM PDT Mon Apr 19 2021

SYNOPSIS. A cooling trend begins today with breezier onshore winds and a deepening marine layer. More widespread cooling is forecast for Tuesday as temperatures return to seasonal averages. Dry and seasonable conditions then persist through Friday. The weekend will bring cooler temperatures and increasing chances for rain late Saturday and Sunday.

DISCUSSION. as of 08:52 AM PDT Monday . Temperatures across the region this morning range from the mid 40s to mid 50s with widespread stratus. These low clouds will begin to dissipate over inland areas through the morning and early afternoon while likely holding near the coastline through much of the day. As the ridge aloft begins to flatten, the air mass will begin to cool which will translate to a cooling trend across the interior today. However, inland areas will still experience afternoon temperatures above seasonal averages today. This said, no updates are needed to the ongoing forecast this morning. For complete details, please see the previous forecast discussion below.

PREV DISCUSSION. as of 03:35 AM PDT Monday . The marine layer has deepened to around 1000 ft, as the upper ridge begins to weaken its grip over our area. Stratus has developed along the coast from Sonoma through the Central Coast and will advance farther inland as the morning progresses. Temperatures are running a few degrees warmer than 24 hours ago at most sites, as a result of the much above normal temperatures experienced yesterday. Today will be another above normal day away from the coast, as a weak ridge remains over our area and 850 mb temps peak. Areas closer to the ocean and bays will cool by a couple to perhaps up to 12 degrees, as stronger onshore flow returns. This will translate to 50s and 60s along the immediate coast, upper 60s to low 70s along the SF Bay shoreline, and low to mid 80s in the inland valleys. Winds may also become pretty gusty in the late afternoon and evening as an upper low forms off the Oregon coast and moves over northern CA.

Tuesday, the area will experience more widespread cooling under the influence of the upper low, with the most significant cooling occuring inland. This basically means a return to near-normal temperatures region-wide. Unfortunately, models keep all precip associated with the low to the north and east of our area.

Wednesday through Friday do not bring any changes to our area in terms of sensible weather. As the low moves east, we become situated between a trough over the inter-mountain west and a ridge several hundred miles off the coast. Temperatures will be near normal, and a marine layer will provide continued night and morning low clouds.

Saturday, an upper low approaches the PacNW, bringing cooling to the coast. Both the ECMWF and GFS bring precip to northern CA Saturday afternoon, but leave our area dry until Sunday morning. There is some disagreement on the path and timing of the low at this point. The ECMWF develops a deep trough off the northern CA coast, which pivots over our area late Sunday, bringing wetting rain to much of the state. The GFS keeps the closed low off the northern coast until Monday afternoon with wetting rain preceding it Sunday afternoon and evening. Ensemble members are also coming together for light to moderate precip in the late Sunday to early Tuesday timeframe. Our forecast reflects this increasing confidence, with chance pops and light qpf across the region Sunday and Monday. Guardedly optimistic at this point, as we're still six days out.

AVIATION. As of 11:30 AM PDT Monday . For the 18Z TAFs. Most inland sites VFR, with coastal sites at MVFR/IFR. Improvements to VFR for coastal sites should be seen by 19-20Z. KMRY could see MVFR until 20Z. VFR conditions around the area after 21Z and lasting through 06-08Z tonight. W/NW winds breezy this afternoon, around 10-15kts. Gusts between 20-25 kt possible, generally, through early tomorrow morning with stronger gust potential for SFO. Winds will remain light to moderately breezy through the night for most areas, preventing FG/BR for KSTS/KAPC Tuesday morning.

Vicinity of KSFO . Satellite shows cloud deck mixing out quickly, with skies FEW-SCT at 080-013. Skies will clear up this afternoon. W/NW winds will increase this afternoon to 20-25+ knots lasting through Tuesday evening. Strongest gusts will be from 09-12Z this morning, with models hinting at G30kts. Will be monitoring for AWW criteria. Winds will relax to 15G20kts for the remainder of Tuesday. Low clouds will return tonight, with prevailing deck SCT010-015.

SFO Bridge Approach . Stratus deck will fill in from 09-16Z, with more confidence for SCT-BKN cigs at 010-015.

Monterey Bay Terminals . The marine layer is about an hour away from scattering out, with KSNS seeing SCT013 already. VFR conditions expected this afternoon before low clouds return this evening and tonight. Light winds this morning increasing this afternoon to around 15 kt. Breezy conditions may linger into the evening.

MARINE. as of 11:28 AM PDT Monday . Northwest winds will increase through the day as a disturbance moves southward from the Pacific Northwest into northern California. Gale force gusts are expected to develop over portions of the coastal waters starting with the Big Sur Coast by late this afternoon before winds increase over the northern waters this evening and persist into Tuesday. These winds will produce steep wind waves resulting in hazardous seas conditions, particularly for smaller vessels. Moderate northwest swell through the period along with a lighter longer period southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Mry Bay from 2 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm from 2 PM SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 PM GLW . Pt Pinos to Pt Piedras Blancas 0-10 nm from 3 PM SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm



PUBLIC FORECAST: RGass/Lorber AVIATION: Dhuyvetter MARINE: Dhuyvetter

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TIBC1 - Tiburon Pier, San Francisco Bay, CA 5 mi83 min SE 14 53°F 1019 hPa
RCMC1 - 9414863 - Richmond, CA 7 mi52 min SSE 8 G 13 56°F 60°F1019.4 hPa
FTPC1 - 9414290 - San Francisco, CA 8 mi52 min WSW 8.9 G 17 54°F 57°F1019.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi46 min S 19 G 21 53°F 1020 hPa
46237 - San Francisco Bar, CA (142) 10 mi64 min 54°F5 ft
PXSC1 11 mi46 min 56°F 50°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 11 mi46 min WSW 11 G 17 56°F 1019.1 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 13 mi46 min W 8 G 11 54°F 1020.1 hPa
OBXC1 13 mi46 min 54°F 50°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 13 mi46 min WSW 9.9 G 11
AAMC1 - 9414750 - Alameda, CA 16 mi46 min WSW 11 G 13 54°F 62°F1020.5 hPa
LNDC1 16 mi46 min W 5.1 G 8.9 55°F 1020.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi46 min WSW 11 G 15 60°F 1018.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 19 mi34 min NW 18 G 25 50°F1020.6 hPa
CQUC1 20 mi75 min 61°F
UPBC1 24 mi46 min WNW 12 G 15
PRYC1 - 9415020 - Point Reyes, CA 24 mi46 min 51°F1020.5 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 24 mi46 min WNW 11 G 13 65°F 62°F1018.2 hPa
PCOC1 - 9415144 - Port Chicago, CA 28 mi46 min W 15 G 16 66°F 62°F1017.9 hPa
RTYC1 - 9414523 - Redwood City, CA 33 mi46 min NNW 12 G 15 60°F 1020.2 hPa
SFXC1 - San Francisco Bay Reserve, CA 34 mi79 min W 12 69°F 1019 hPa49°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 36 mi46 min NW 12 G 17 67°F 1017.2 hPa
BDXC1 40 mi58 min 50°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 42 mi34 min NNW 16 G 19 50°F 1021.8 hPa47°F
46214 - Point Reyes, CA (029) 49 mi38 min 50°F9 ft

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA16 mi69 minSE 610.00 miFair68°F52°F56%1018.6 hPa
Oakland, Metro Oakland International Airport, CA22 mi71 minW 710.00 miA Few Clouds57°F47°F69%1020.5 hPa
San Francisco, San Francisco International Airport, CA22 mi68 minWNW 16 G 209.00 miA Few Clouds61°F45°F56%1020.1 hPa
Petaluma Municipal Airport, CA24 mi69 minW 5 G 1010.00 miFair72°F48°F44%1019 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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N16N8--N3N5N3N4NW4CalmCalmCalmCalmCalmCalmCalmCalmSE4
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Tide / Current Tables for Corte Madera Creek, San Francisco Bay, California
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Corte Madera Creek
Click for Map
Mon -- 02:09 AM PDT     Moonset
Mon -- 05:04 AM PDT     4.78 feet High Tide
Mon -- 06:28 AM PDT     Sunrise
Mon -- 11:40 AM PDT     Moonrise
Mon -- 12:37 PM PDT     0.19 feet Low Tide
Mon -- 07:50 PM PDT     Sunset
Mon -- 08:38 PM PDT     4.10 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.33.43.74.24.64.84.64.23.32.41.40.70.30.20.51.11.82.53.23.74.14.13.93.6

Tide / Current Tables for Raccoon Strait off Hospital Cove, San Francisco Bay, California Current
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Raccoon Strait off Hospital Cove
Click for Map
Mon -- 01:14 AM PDT     0.00 knots Slack
Mon -- 02:08 AM PDT     Moonset
Mon -- 03:09 AM PDT     0.52 knots Max Flood
Mon -- 05:41 AM PDT     -0.00 knots Slack
Mon -- 06:28 AM PDT     Sunrise
Mon -- 09:43 AM PDT     -1.59 knots Max Ebb
Mon -- 11:40 AM PDT     Moonrise
Mon -- 02:26 PM PDT     0.00 knots Slack
Mon -- 04:48 PM PDT     1.15 knots Max Flood
Mon -- 07:49 PM PDT     Sunset
Mon -- 08:34 PM PDT     -0.00 knots Slack
Mon -- 10:37 PM PDT     -0.60 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-00.20.50.40.2-0.1-0.5-1.1-1.5-1.6-1.4-1-0.6-0.20.411.110.80.3-0.2-0.5-0.6

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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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