Thursday, July9, 2020
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Marine Weather and Tides
Tomales, 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 5:54AMSunset 8:37PM Thursday July 9, 2020 3:15 AM PDT (10:15 UTC) Moonrise 10:54PMMoonset 9:22AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 221 Am Pdt Thu Jul 9 2020
.small craft advisory in effect through Friday evening...
Today..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 8 to 9 ft. NW swell 4 to 5 ft at 8 seconds and S around 2 ft at 14 seconds.
Tonight..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 7 to 8 ft. NW swell 4 to 6 ft at 9 seconds and S around 2 ft at 14 seconds.
Fri..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 6 to 7 ft. Mixed swell nw 3 to 4 ft at 9 seconds and S around 2 ft at 14 seconds.
Fri night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 6 to 7 ft. NW swell 3 to 5 ft at 8 seconds.
Sat..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 6 to 7 ft. NW swell 4 to 5 ft at 8 seconds.
Sat night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 7 to 8 ft. NW swell 4 to 5 ft at 8 seconds.
Sun..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 4 to 5 ft. NW swell 4 to 5 ft.
Mon..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 4 to 5 ft.
PZZ500 221 Am Pdt Thu Jul 9 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate northwest winds will continue through Friday. These winds will generate steep fresh swell resulting in hazardous seas conditions particularly for smaller vessels. Winds will begin to ease Friday night into Saturday as the high weakens but stronger winds may persist over the northern outer waters.


7 Day Forecast for Marine Location Near Tomales, CA
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location: 38.19, -122.92     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 091000 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 300 AM PDT Thu Jul 9 2020

SYNOPSIS. A warming and drying trend will occur through the remainder of the work week and into the upcoming weekend, primarily across the interior. Meanwhile, mild temperatures will persist near the coast, along with areas of night and morning low clouds and fog. Cooling is forecast for inland areas early next week.

DISCUSSION. As of 3:00 AM PDT Thursday . Low clouds have been increasing along the coast from San Francisco southward overnight, and also developing inland from Monterey Bay and up the Salinas Valley. The north-to-south surface pressure gradient from ACV to SFO has been holding at about 5 mb since last evening, enough to mostly prevent stratus from developing in the North Bay or around San Francisco Bay (aside from a few patches). Another factor limiting inland development of low clouds this morning is the shallow depth of the marine layer which currently is at about 1000 feet per the Fort Ord Profiler.

The latest local WRF model indicates light northerly flow will develop near the top of the boundary layer this morning. This dry flow should help clear the shallow low cloud layer relatively quickly this morning, leaving mostly sunny skies for the balance of the day. Temperatures today are expected to be a few degrees warmer than yesterday thanks to increasing subsidence under a broad and strengthening upper ridge that currently extends from West Texas to Southern California. Models agree that this ridge will continue to strengthen and expand northward into the upcoming weekend, resulting in a continued gradual warming trend. This warming trend will primarily impact inland areas, while coastal areas remain seasonably mild due to persistent onshore flow. On Friday a few inland areas, mainly in the North Bay Valleys, will likely experience a pause in the warming trend, or even a temporary slight downturn in temps, as northerly gradients relax. But the overall trend through the weekend will be continued warming. Lower to mid 90s will become more common in the interior valleys over the next two days, with a few 100 degree readings likely in the warmest locations like Lake Berryessa and Pinnacles National Park. Temperatures are expected to peak on Sunday when most inland valley highs are forecast to range from the mid 90s to around 100, while the hottest valleys top out around 105. Meanwhile, persistent onshore surface winds and a shallow marine layer will keep temperatures near the ocean mostly in the 60s and lower 70s.

Although the inland valleys and hills will experience very warm to hot temperatures over the next four days, especially on Saturday and Sunday, Heat Risk is expected to remain mostly in the moderate category. This is because the very dry airmass over inland areas will allow for efficient nighttime cooling. Overnight lows are forecast to be in the 50s and lower 60s at most lower elevation locations. High Heat Risk values are projected only for isolated locations in the inland hills over the weekend, where overnight temperatures will only cool into the 70s.

Hot and dry conditions across inland areas through the weekend will mean continued concerns from a fire weather standpoint as daytime relative humidity values drop as low as the single digits and very poor overnight humidity recoveries occur in the hills. Fortunately, winds are forecast to be mostly light, except for locally moderate afternoon and evening seabreeze winds.

The upper ridge is forecast to weaken early next week as a trough develops over the Pacific NW and northern Rockies. Thus, relief from the heat should begin on Monday. Additional inland cooling is likely on Tuesday and Wednesday when models agree that southerly surface flow will develop near the coast, resulting in more efficient inland transport of marine air.

AVIATION. As of 10:31 PM PDT Wednesday . For 06z TAFs. Patchy cloud cover have moved over coastal terminals, though VFR conditions are still present and forecast through the TAF period; the exception still being near the Monterey Peninsula dropping to IFR later tonight. Onshore winds will prevail through the TAF period with lighter winds overnight and stronger winds Thursday afternoon, with stronger gusts possible, with widespread VFR.

Vicinity of KSFO . FEW cigs at 1200 ft AGL as KHAF is at MVFR. While a few clouds could spill over the Bay, there is low confidence in lower cigs at KSFO for tonight. Winds are still breezy and onshore, though lighter than earlier tonight. VFR is forecast on Thursday with stronger onshore winds with occasional gusts.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . MVFR already at KMRY with VFR elsewhere. IFR and even LIFR is possible for terminals closer to the coast. MVFR is expected farther inland with IFR possible. Winds remain onshore and breezy, but will ease overnight. Clouds should mix out by 18z for VFR, with stronger onshore winds Thursday afternoon.

MARINE. as of 2:21 AM PDT Thursday . Moderate northwest winds will continue through Friday. These winds will generate steep fresh swell resulting in hazardous seas conditions particularly for smaller vessels. Winds will begin to ease Friday night into Saturday as the high weakens but stronger winds may persist over the northern outer waters.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pigeon Pt to Pt Pinos 0-10 nm from 3 PM SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 AM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm from 5 PM



PUBLIC FORECAST: Dykema AVIATION: DK MARINE: W Pi

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 21 mi136 min NW 25 G 29 1010.4 hPa (-0.6)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi156 min NW 9.7 G 14 53°F 1012.1 hPa51°F
46237 - San Francisco Bar, CA (142) 32 mi46 min 53°F4 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 32 mi30 min SSW 15 54°F 1011 hPa
RCMC1 - 9414863 - Richmond, CA 33 mi46 min S 11 G 15 56°F 64°F1011.3 hPa
46214 - Point Reyes, CA (029) 34 mi20 min 51°F10 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 35 mi46 min S 13 G 17 57°F 1011.9 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 36 mi46 min WSW 11 G 12 59°F 1010.4 hPa
FTPC1 - 9414290 - San Francisco, CA 36 mi46 min WSW 5.1 G 11 55°F 61°F1012.1 hPa
PXSC1 39 mi46 min 57°F 53°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 39 mi46 min SE 4.1 G 7 55°F 1010.9 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 41 mi46 min SW 8 G 9.9 56°F 1011.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 41 mi46 min SW 13 G 15
OBXC1 41 mi46 min 57°F 56°F
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi46 min NW 7 G 8.9 61°F 69°F1010.5 hPa
LNDC1 43 mi46 min SW 5.1 G 7 57°F 1011.9 hPa
AAMC1 - 9414750 - Alameda, CA 44 mi46 min WSW 8 G 12 57°F 71°F1012.1 hPa
UPBC1 44 mi46 min WNW 6 G 8.9
SFXC1 - San Francisco Bay Reserve, CA 47 mi91 min WNW 8.9
PCOC1 - 9415144 - Port Chicago, CA 48 mi46 min SW 7 G 9.9 59°F 70°F1010 hPa

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petaluma Municipal Airport, CA17 mi41 minN 010.00 miOvercast52°F51°F100%1011.2 hPa
Novato / Gnoss Field, CA20 mi41 minN 010.00 miFair52°F48°F88%1011.2 hPa
Santa Rosa, Santa Rosa Sonoma County Airport, CA23 mi23 minN 07.00 miFair53°F48°F83%1010.3 hPa

Link to 5 minute data for KO69

Wind History from O69 (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalm435W6NW86
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W8--W5CalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmW9NW3SW6W8
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W7W8W7SW9W6CalmCalmCalmN4CalmCalm
2 days agoN3CalmN3CalmNW33W7W8
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W8CalmCalm454W5
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Tide / Current Tables for Blakes Landing, Tomales Bay, California
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Blakes Landing
Click for Map
Thu -- 02:59 AM PDT     4.68 feet High Tide
Thu -- 05:56 AM PDT     Sunrise
Thu -- 10:22 AM PDT     Moonset
Thu -- 10:27 AM PDT     -0.18 feet Low Tide
Thu -- 05:06 PM PDT     4.29 feet High Tide
Thu -- 08:36 PM PDT     Sunset
Thu -- 11:00 PM PDT     2.21 feet Low Tide
Thu -- 11:53 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.13.84.44.74.53.93210.2-0.1-0.10.41.32.33.344.34.23.83.22.72.32.2

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Thu -- 12:24 AM PDT     0.68 knots Max Flood
Thu -- 03:10 AM PDT     -0.00 knots Slack
Thu -- 05:58 AM PDT     Sunrise
Thu -- 06:25 AM PDT     -1.27 knots Max Ebb
Thu -- 10:22 AM PDT     0.00 knots Slack
Thu -- 10:23 AM PDT     Moonset
Thu -- 01:25 PM PDT     0.99 knots Max Flood
Thu -- 04:49 PM PDT     -0.00 knots Slack
Thu -- 07:05 PM PDT     -0.68 knots Max Ebb
Thu -- 08:36 PM PDT     Sunset
Thu -- 10:39 PM PDT     0.00 knots Slack
Thu -- 11:54 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.60.40.1-0.4-0.9-1.2-1.2-1-0.6-0.20.30.8110.80.4-0.1-0.5-0.7-0.6-0.4-0.20.1

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