Tuesday, July7, 2020
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Marine Weather and Tides
Lagunitas-Forest Knolls, 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 5:53AMSunset 8:36PM Tuesday July 7, 2020 5:09 PM PDT (00:09 UTC) Moonrise 9:52PMMoonset 7:19AM Illumination 93% Phase: Waning Gibbous; Moon at 17 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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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 224 Pm Pdt Tue Jul 7 2020
.small craft advisory in effect through late tonight...
Tonight..NW winds 20 to 30 kt with occasional gusts up to 40 kt. Wind waves 8 to 9 ft. NW swell 4 to 6 ft at 9 seconds and S around 2 ft at 14 seconds.
Wed..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 3 to 5 ft at 9 seconds and S around 2 ft at 15 seconds.
Wed night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. NW swell 3 to 5 ft at 9 seconds and S around 2 ft at 15 seconds.
Thu..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 4 to 5 ft. NW swell 3 to 5 ft at 9 seconds and S around 2 ft at 14 seconds.
Thu night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. NW swell 4 to 6 ft at 8 seconds and S around 2 ft at 14 seconds.
Fri..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. NW swell 2 to 4 ft at 9 seconds.
Fri night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. NW swell 3 to 5 ft at 8 seconds.
Sat..NW winds 10 to 20 kt. Wind waves 2 to 3 ft. NW swell 4 to 6 ft.
Sun..NW winds 10 to 20 kt. Wind waves 1 to 2 ft. NW swell 3 to 5 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 5 to 7 ft with dominate swell period of 7 seconds. Across the bar...seas 6 to 8 ft with dominate swell period of 8 seconds. Maximum ebb current of 1.8 kt at 07:31 pm Tuesday and 3.0 kt at 07:19 am Wednesday.
PZZ500 224 Pm Pdt Tue Jul 7 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A 1033 mb high pressure centered over the eastern pacific and troughing over the west will continue to produce strong and gusty northwest winds through midweek. The strongest winds will occur off of the big sur coast where gale force gusts are likely through this evening. These strong winds will continue to generate steep fresh swell and hazardous seas conditions. Winds will begin to diminish late in the week.


7 Day Forecast for Marine Location Near Lagunitas-Forest Knolls CDP, CA
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location: 37.98, -122.74     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 072344 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 444 PM PDT Tue Jul 7 2020

SYNOPSIS. Seasonably cool temperatures will continue today as an upper trough moves through the region. Temperatures are expected to be similar through midweek before warming late in the week and into next weekend as high pressure builds over the region.

DISCUSSION. as of 01:37 PM PDT Tuesday . Mostly clear skies remain over the region with some low clouds well offshore over the waters. Breezy onshore winds this afternoon along the coast and in the hills with observations showing gusts between 25 and 35 mph. Winds have eased compared to yesterday and this morning since the onshore SFO-SAC gradient has weakened. Winds will continue to diminish tonight as a passing upper level trough exits the region into tomorrow. Temperatures this afternoon are within a few degrees of yesterday with most coastal areas in the 60s to low 70s and 70s to low 80s across the interior. Seasonable afternoon highs still anticipated with 60s/70s along the coast and 80s/90s inland. Some uncertainty exists as to whether more extensive low clouds return to the coast tonight/tomorrow morning. The latest NAM model shows the SFO-ACV gradient remaining around 5-6 mb into tomorrow morning. This may once again limit the amount of stratus.

The upper level trough currently over California will continue to move eastward into tomorrow while zonal flow develops aloft. This will result in a slight increase in temperatures tomorrow, though conditions will remain fairly seasonable. More noticeable warming is expected late this week and into the weekend as high pressure continues to build over the Desert Southwest and expand into California. A wide spread of highs is forecast late this week and through the weekend where the coast will continue to see temperatures in the 60s and 70s while the far portions of the interior will reach the mid to upper 90s. Enough cooling is expected in the overnight hours to limit heat risk to low for most locations with only some patches of moderate heat risk far inland. Latest deterministic models show high pressure situated over the Desert Southwest through much of next week.

AVIATION. As of 4:42 PM PDT Tuesday . for 00Z TAFs. Clear skies over the regional terminals, while visible satellite shows stratus over the ocean making a southerly trend down the coastline. Winds are breezy and onshore, with a few stronger gusts at coastal terminals. Difficult forecast tonight dependent upon the movement of the stratus and the onshore inundation of moisture toward land that is locked in with dry air. Changes for low clouds for coastal terminals, but there is low confidence given the strength the dry air (lack of low clouds) last night/this past morning. Winds will scale back overnight before another afternoon breezy conditions.

Vicinity of KSFO . VFR. Winds are out of the west between 21-24 kt, gust up to 30 knots is still possible until approximately 4z. Winds will subside overnight potential for FEW/SCT low clouds to develop early Wednesday morning, low confidence in any fuller build up of clouds. VFR expected again on Wednesday afternoon with strong onshore winds.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Skies are clear with breezy onshore winds and occasional stronger gusts. As winds subside this evening, low clouds are forecast to develop with MVFR likely, and IFR conditions possible with the potential for lowering visibility as well. Clouds are expected to lift around 17z Wednesday as winds remain onshore and become breezy in the afternoon.

MARINE. as of 04:34 PM PDT Tuesday . A 1033 mb high pressure centered over the eastern Pacific and troughing over the West will continue to produce strong and gusty northwest winds through midweek. The strongest winds will occur off of the Big Sur coast where gale force gusts are likely through this evening. These strong winds will continue to generate steep fresh swell and hazardous seas conditions. Winds will begin to diminish late in the week.

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



PUBLIC FORECAST: AS AVIATION: DK MARINE: RGass

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 15 mi99 min 59°F5 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 16 mi159 min NW 18 G 23 53°F 51°F1015.5 hPa51°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 17 mi53 min SSW 12 71°F 1012 hPa
RCMC1 - 9414863 - Richmond, CA 18 mi51 min S 11 G 14 64°F 66°F1012.5 hPa
FTPC1 - 9414290 - San Francisco, CA 19 mi51 min SW 16 G 25 60°F 64°F1013.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi51 min SW 20 G 28 61°F 1013 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi51 min WSW 13 G 20 65°F 1012.3 hPa
PXSC1 22 mi51 min 66°F 53°F
OBXC1 24 mi51 min 66°F 54°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi51 min WSW 7 G 13
OKXC1 - 9414776 - Oakland (Berth 34), CA 25 mi51 min W 7 G 8 66°F 1013.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi51 min SW 13 G 16 74°F 1012 hPa
AAMC1 - 9414750 - Alameda, CA 27 mi51 min W 7 G 9.9 67°F 71°F1013.6 hPa
LNDC1 27 mi51 min WSW 8.9 G 11 67°F 1013.4 hPa
UPBC1 33 mi51 min WNW 12 G 14
MZXC1 - 9415102 - Martinez-Amorco CA 33 mi51 min W 9.9 G 14 79°F 69°F1011.8 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 35 mi179 min NW 27 G 33 49°F1014.4 hPa
PCOC1 - 9415144 - Port Chicago, CA 38 mi51 min W 9.9 G 11 81°F 73°F1011.4 hPa
46214 - Point Reyes, CA (029) 38 mi43 min 53°F11 ft
SFXC1 - San Francisco Bay Reserve, CA 41 mi84 min W 7
RTYC1 - 9414523 - Redwood City, CA 43 mi51 min W 14 G 16 76°F 74°F1013.3 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi51 min NW 6 G 8.9 83°F 1011.4 hPa

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA15 mi74 minSW 11 G 1710.00 miFair86°F48°F27%1012.2 hPa
Petaluma Municipal Airport, CA20 mi74 minW 95.00 miFair with Haze84°F48°F29%1012.9 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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4S7--E6E6E4Calm3CalmCalmCalmCalmCalm3Calm45SW9SW12SW12SW12
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S6CalmCalmCalmCalmN5CalmCalmCalmCalmCalmCalmCalmCalmS7
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4CalmN6CalmN3CalmCalmCalmCalmN3CalmCalmCalmCalm3SW6
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Tide / Current Tables for Bolinas Lagoon, California
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Bolinas Lagoon
Click for Map
Tue -- 12:47 AM PDT     4.37 feet High Tide
Tue -- 05:55 AM PDT     Sunrise
Tue -- 08:19 AM PDT     Moonset
Tue -- 08:27 AM PDT     -0.61 feet Low Tide
Tue -- 03:03 PM PDT     3.48 feet High Tide
Tue -- 08:29 PM PDT     1.78 feet Low Tide
Tue -- 08:35 PM PDT     Sunset
Tue -- 10:51 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.24.44.13.52.61.50.5-0.2-0.6-0.5-00.71.72.53.23.53.332.52.11.81.82.22.9

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Tue -- 01:39 AM PDT     -0.00 knots Slack
Tue -- 05:00 AM PDT     -1.54 knots Max Ebb
Tue -- 05:56 AM PDT     Sunrise
Tue -- 08:20 AM PDT     Moonset
Tue -- 08:59 AM PDT     0.00 knots Slack
Tue -- 12:04 PM PDT     1.19 knots Max Flood
Tue -- 03:26 PM PDT     -0.00 knots Slack
Tue -- 05:38 PM PDT     -0.70 knots Max Ebb
Tue -- 08:37 PM PDT     Sunset
Tue -- 08:53 PM PDT     0.00 knots Slack
Tue -- 10:53 PM PDT     Moonrise
Tue -- 11:38 PM PDT     0.77 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.3-0.2-0.8-1.4-1.5-1.4-1.1-0.600.611.21.10.80.3-0.3-0.6-0.7-0.5-0.300.40.7

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 (20,4,5,8)
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Ground Weather Radar Station Sacramento, CA
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