Saturday, January25, 2020
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Marine Weather and Tides
Tamalpais-Homestead Valley, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:18AMSunset 5:26PM Saturday January 25, 2020 12:31 AM PST (08:31 UTC) Moonrise 8:06AMMoonset 6:21PM Illumination 0% Phase: New Moon; Moon at 0 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- 840 Pm Pst Fri Jan 24 2020
Tonight..SW winds up to 10 kt. A slight chance of rain this evening.
Sat..SW winds up to 10 kt.
Sat night..SW winds 5 to 15 kt. Rain.
Sun..W winds 5 to 15 kt. A chance of rain.
Sun night..NW winds 5 to 15 kt.
Mon..W winds up to 10 kt.
Mon night..SW winds around 5 kt.
Tue..W winds up to 10 kt.
Wed..NW winds up to 10 kt.
PZZ500 840 Pm Pst Fri Jan 24 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light winds will continue through Saturday afternoon with southerly winds over the northern waters and northwest winds over the southern waters. Winds will then become west to southwest and become breezy late Saturday and into Sunday as the next system approaches. A long period west to northwest swell will continue to impact the waters through Saturday. This will create conditions hazardous to small crafts. Additional long period northwest swells will arrive this weekend and early next week.


7 Day Forecast for Marine Location Near Tamalpais-Homestead Valley, CA
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location: 37.89, -122.57     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 250603 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1003 PM PST Fri Jan 24 2020

SYNOPSIS. Two weak weather systems will bring periodic chances of light rain to the region from tonight through Sunday morning. Light rain or sprinkles with the first system tonight and Saturday morning should be mostly confined to the North Bay. More widespread rain is expected with the second system from late Saturday through Sunday morning, but rainfall amounts will once again be light. Generally dry conditions, along with above normal temperatures, are forecast for next week.

DISCUSSION. As of 8:45 PM PST Friday . Based on the 00Z NAM, widespread light warm advection precipitation should be developing in the North Bay at the present time, but latest KMUX radar is showing only isolated very weak returns. The latest HRRR may have a more realistic handle on short-term precipitation potential as it forecasts virtually no measurable rain overnight and into Saturday morning. Rain chances will increase in the North Bay by late Saturday afternoon as both moisture and warm advection increase ahead of an incoming shortwave trough. Rain will then become more widespread by late Saturday night as a weak cold front tracks quickly across the region. A few showers may linger into Sunday morning, but for the most part Sunday should be a dry day. Rain totals from tonight through Sunday morning are forecast to be in the range of a tenth to a half inch in the North Bay, and mostly less than a tenth of an inch elsewhere. Southern interior sections of our forecast area will likely see no measurable rain.

The airmass over our area will remain mild through the weekend. Expect highs ranging from the upper 50s in the north to the upper 60s in the south, with overnight lows mostly from the mid 40s to lower 50s.

Models agree that dry conditions will persist for most of next week as an upper ridge over the Eastern Pacific gradually builds over California. The exception may be a brief period of light rain in the North Bay Monday night and Tuesday morning as a weak system moves inland to our north. Temperatures are expected to warm above normal during the second half of the week.

Longer range models suggest continued dry conditions into the first week of February. Both the GFS and ECMWF ensemble mean indicate a persistent ridge near the West Coast, except for a brief weakening of the ridge around February 2nd.

AVIATION. as of 10:03 PM PST Friday . For 06Z TAFs. Clouds overspreading the region will lower to MVFR overnight. A few showers will be possible across the North Bay and possibly as far south as the Bay Area overnight. IFR cigs developing Saturday morning across many of the terminals. Very low cigs/fog have been observed near the coast this evening. These low cigs could impact the Bay Area terminals early Saturday morning with LIFR conditions possible. Low clouds will linger into the afternoon on Saturday but generally lift to SCT/BKN between 2,000 and 4,000 ft AGL. The exception will be across the North Bay where IFR/MVFR cigs will linger through the day. Winds through Saturday afternoon will be light and diurnal/terrain driven, becoming south to southeasterly late in the period. A weak front will begin to approach the area with scattered showers and MVFR cigs towards 12z Sunday.

Vicinity of KSFO . An isolated shower is possible late this evening. Cigs gradually lowering to MVFR overnight. IFR cigs expected Saturday morning, with periods of LIFR and patchy fog also possible. Conditions will improve Saturday afternoon but SCT/BKN clouds with bases 2,000 to 4,000 ft AGL will persist. Cigs lowering to MVFR Saturday evening with scattered showers. Light winds through Saturday afternoon, with south to southwest winds 5-10 kt developing Saturday night.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Clouds will continue to increase tonight with periods of IFR at KMRY through 09z. MVFR cigs prevailing Saturday morning with patchy fog and reductions to IFR possible. Conditions will improve Saturday afternoon with VFR developing. Generally light winds through the period.

MARINE. As of 8:40 PM PST Friday . Generally light winds will continue through Saturday afternoon with southerly winds over the northern waters and northwest winds over the southern waters. Winds will then become west to southwest and become breezy late Saturday and into Sunday as the next system approaches. A long period west to northwest swell will continue to impact the waters through Saturday. This will create conditions hazardous to small crafts. Additional long period northwest swells will arrive this weekend and early next week.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Mry Bay SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Pinos 0-10 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm



PUBLIC FORECAST: Dykema AVIATION: ST MARINE: ST

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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 7 mi33 min SE 1.9 54°F 1022 hPa
46237 - San Francisco Bar, CA (142) 8 mi32 min 53°F8 ft
FTPC1 - 9414290 - San Francisco, CA 8 mi50 min 54°F 53°F1022.1 hPa
RCMC1 - 9414863 - Richmond, CA 9 mi44 min 53°F
PXSC1 11 mi44 min 56°F 56°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 11 mi44 min 55°F 1021 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 11 mi44 min 55°F 1022.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi62 min NNW 1.9 G 2.9
OBXC1 14 mi44 min 54°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi44 min 53°F 1022.1 hPa
AAMC1 - 9414750 - Alameda, CA 16 mi44 min 53°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 17 mi22 min SE 3.9 G 7.8 55°F 54°F1022.1 hPa
LNDC1 17 mi44 min 55°F 1022 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 20 mi44 min 54°F 1021.8 hPa
PRYC1 - 9415020 - Point Reyes, CA 23 mi44 min 53°F1021.2 hPa
UPBC1 26 mi62 min ENE 4.1 G 5.1
MZXC1 - 9415102 - Martinez-Amorco CA 26 mi50 min 53°F 51°F1021.9 hPa
PCOC1 - 9415144 - Port Chicago, CA 30 mi44 min 53°F 50°F1021.6 hPa
RTYC1 - 9414523 - Redwood City, CA 33 mi44 min 55°F 54°F1022.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 36 mi47 min Calm
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 38 mi50 min 53°F 1021.7 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 40 mi22 min Calm G 3.9 55°F 55°F1022.4 hPa54°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi22 min SE 3.9 G 9.7 55°F1021.5 hPa
46214 - Point Reyes, CA (029) 47 mi32 min 55°F10 ft

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA18 mi57 minN 010.00 mi55°F55°F100%1022 hPa
San Francisco, San Francisco International Airport, CA22 mi36 minWNW 810.00 miMostly Cloudy55°F52°F90%1021.7 hPa
Oakland, Metro Oakland International Airport, CA23 mi39 minNW 310.00 miMostly Cloudy56°F53°F90%1022 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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Last 24hrCalmCalmS3CalmCalmCalmNE4CalmCalmCalmCalmCalmCalmN8N9NW10N10N7NW6CalmCalmCalmN4Calm
1 day agoCalmCalmCalmCalmCalmS5S5S4S4S4SW4S5S5S5S5S3SW4S3S3CalmCalmCalmCalmN3
2 days agoCalmCalmCalmCalmCalmCalmCalmNW3N4N63CalmCalm4CalmSE4W4CalmCalmCalmCalmS3CalmS3

Tide / Current Tables for Sausalito, Corps of Engineers Dock, San Francisco Bay, California
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Sausalito
Click for Map
Sat -- 12:54 AM PST     4.97 feet High Tide
Sat -- 05:41 AM PST     2.85 feet Low Tide
Sat -- 07:19 AM PST     Sunrise
Sat -- 08:05 AM PST     Moonrise
Sat -- 11:27 AM PST     6.13 feet High Tide
Sat -- 05:25 PM PST     Sunset
Sat -- 06:21 PM PST     Moonset
Sat -- 06:23 PM PST     -0.59 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.754.74.13.432.93.23.94.85.66.165.44.22.71.10-0.5-0.50.11.12.23.4

Tide / Current Tables for Richardson Bay Entrance, San Francisco Bay, California Current
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Richardson Bay Entrance
Click for Map
Sat -- 01:24 AM PST     -0.43 knots Max Ebb
Sat -- 03:47 AM PST     0.00 knots Slack
Sat -- 05:58 AM PST     0.80 knots Max Flood
Sat -- 07:19 AM PST     Sunrise
Sat -- 08:05 AM PST     Moonrise
Sat -- 09:08 AM PST     -0.01 knots Slack
Sat -- 01:27 PM PST     -0.95 knots Max Ebb
Sat -- 04:39 PM PST     0.01 knots Slack
Sat -- 05:25 PM PST     Sunset
Sat -- 06:20 PM PST     Moonset
Sat -- 07:06 PM PST     1.09 knots Max Flood
Sat -- 10:45 PM PST     -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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-0.4-0.4-0.4-0.20.10.60.80.70.50.1-0.3-0.6-0.8-0.9-0.9-0.7-0.30.30.91.110.80.4-0.1

Weather Map
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wmap_P
GEOS Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (3,6,7,8)
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Ground Weather Radar Station Sacramento, CA
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