Saturday, September19, 2020
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Marine Weather and Tides
Mill Valley, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:54AMSunset 7:12PM Saturday September 19, 2020 10:43 AM PDT (17:43 UTC) Moonrise 8:29AMMoonset 7:59PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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- 830 Am Pdt Sat Sep 19 2020
Today..SW winds 5 to 15 kt.
Tonight..SW winds 5 to 15 kt.
Sun..SW winds 5 to 15 kt.
Sun night..SW winds 5 to 15 kt.
Mon..SW winds 5 to 15 kt.
Mon night..SW winds 5 to 15 kt.
Tue..W winds 10 to 20 kt.
Wed..W winds 5 to 15 kt.
PZZ500 830 Am Pdt Sat Sep 19 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will be generally light across the waters with locally stronger conditions along the big sur coast south of point sur. Winds will increase over the waters Saturday and into Saturday night. These winds will generate steep fresh swell resulting in hazardous seas conditions for smaller vessels. Mixed seas will continue with a shorter period northwest swell and a moderate period south to southwest swell. A longer period southwest swell will arrive Sunday morning.


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 191714 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1014 AM PDT Sat Sep 19 2020

SYNOPSIS. A warming and drying trend is forecast through the rest of the weekend. Temperatures will then cool slightly on Monday and Tuesday, followed by warmer temperatures starting around the middle of next week.

DISCUSSION. as of 10:12 AM PDT Saturday . Forecast remains on track for a warming trend this weekend. Morning satellite continues to show some low clouds along portions of the coast, but these should clear out through the day. As of 10 AM temps are generally running about 3 degrees lower than yesterday at this time. This is due to be in the wake of a weak cold front that passed Friday. Transiting high pressure will bring the warming. The only other item of note is smoke from the August Lightning Complex is drifting into North Bay and will impact that area through the weekend.

PREV DISCUSSION. As of 3:47 AM PDT Friday . Water vapor imagery shows the majority of the moisture associated with the upper-level trough over British Columbia this morning, while the remainder of the moisture moves across Idaho, Montana, Wyoming, and the Great Basin. The center of the trough is currently over the PAC NW, with our CWA currently to the left of the axis. Following yesterday's cold frontal passage, temps fell across most of the interior while the marin layer inversion weakened substantially. Despite this setup, winds were light enough to limit much mixing, resulting in little clearing of coastal stratus yesterday afternoon. Based on both the Fort Ord and Bodega Bay profilers this morning, looking like the marine layer inversion is slowly bouncing back. The light winds have played out into the overall continuation of patchy low-stratus along the coast with some interior locations this morning also experiencing patchy fog. Can expect for low- stratus to become more widespread near the coast, the valleys, and the bays by daybreak as the marine layer continues to gradually rebuild.

850 hPa temps look progged by the HRRR to build back up across the interior this afternoon, while near-surface winds will also trend more northerly. As such, the culmination of greater diurnal heating as the trough axis exits our CWA and the resulting northerly winds will allow for interior surface temps to warm at least a few degrees today. Given this setup, adjustments to today's max temps were made due to the NBM not capturing warm enough temperatures across most of the interior. In terms of air quality, HRRR-smoke takes vertically integrated smoke plume from the August Complex down into parts of the North Bay as northerly flow picks up across the lower-atmosphere. As such, may see a deterioration of air quality conditions there. Smoke canopy overall is not as large as last week thanks to all of the clearing we experienced mid-week, so northerly winds not expected to produce air quality deterioration to last week's levels should the smoke plume from the August Complex make it down to the SF Peninsula and East Bay.

For more information on air quality concentrations, be sure to reach out to the Bay Area Air Quality Network and/or AirNow.

This drying trend following the trough exit will be enhanced through Sunday as zonal ridging becomes the dominant factor along the West Coast. Rising mid-level heights will result in a continuation of warming trend, along with drying trend all while onshore flow weakens and marine layer expansion is once again limited. Expect Sunday to be the warmest day of the weekend, with interior max temps to be 5 to 10 degrees warmer than average as a result.

Nevertheless, this warming trend will come to a halt Monday and Tuesday as mid-range guidance introduces a shortwave trough that moves right along the same area that this week's upper-level trough moved over. As its axis moves ashore, mid-level heights will once again fall across the West Coast, resulting in a cooling trend that will bring temps in our CWA back to near seasonal average, especially by Tuesday. Once the shortwave exits the region, mid-level heights are progged to increase yet again across the CWA, resulting in a warming trend that will last through the second half of next week.

Looking ahead into the long range, the question becomes how long this warming trend will last. ECMWF ENS and GEPS both are hinting at the potential for both much warmer temps during the final weekend of September, while the GEFS is a little less robust on mid-level heights. That being said, all three ensembles have been hinting at an offshore wind signature, with northerly and northeasterly winds developing across the CWA. While still over 200 hours out, this pattern would be a major concern for both current active wildfire efforts and pose a new challenge for preventing wildfire starts. Stay tuned.

AVIATION. As of 04:33 AM PDT Saturday . for 12Z TAFS. Mixed conditions continue as satellite imagery shows patchy stratus across the region. Expect patchy IFR/LIFR cigs this morning before lifting to MVFR by mid morning. Observations also show patchy fog over the North Bay. VFR conditions expected by late this morning (~16z-19z depending on location). Latest HRRR smoke model still shows an increase in smoke across the North Bay this morning before spreading to the Bay Area this afternoon as winds shift more northerly, but not expecting a significant reduction in vis. Generally light winds this morning increasing and turning onshore this afternoon around 10-15 kt with locally higher gusts at KSFO.

Vicinity of KSFO . MVFR/IFR cigs remain around the terminal and over the south SF Bay. Cigs may occasionally go SCT early this morning with VFR conditions expected by around 16z-17z. Onshore winds around 10 kt increasing this afternoon to 15 kt with gusts of 20 to 25 kt.

SFO Bridge Approach . Clouds look a little more settled in along the approach. May clear later than the terminal.

Monterey Bay Terminals . Stratus has re-formed over the Peninsula and is slowly spreading towards Salinas. LIFR/IFR cigs with clearing expected late this morning (~17z-19z). Generally light winds turning onshore this afternoon.

MARINE. as of 10:07 AM PDT Saturday . Winds will be generally light across the waters with locally stronger conditions along the Big Sur Coast south of Point Sur. Winds will increase over the waters Saturday and into Saturday night. These winds will generate steep fresh swell resulting in hazardous seas conditions for smaller vessels. Mixed seas will continue with a shorter period northwest swell and a moderate period south to southwest swell. A longer period southwest swell will arrive Sunday morning.

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



PUBLIC FORECAST: Garcia/Diaz/Dykema AVIATION: AS MARINE: DK

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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 mi44 min SSE 4.1 64°F 1017 hPa
RCMC1 - 9414863 - Richmond, CA 7 mi67 min SSE 1 G 1.9 65°F 64°F1016.4 hPa
FTPC1 - 9414290 - San Francisco, CA 8 mi55 min WSW 6 G 8.9 62°F 64°F1016.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi61 min S 6 G 7 63°F 1017 hPa
46237 - San Francisco Bar, CA (142) 10 mi43 min 60°F3 ft
PXSC1 11 mi61 min 65°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 11 mi55 min E 4.1 G 5.1 63°F 1015.6 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 13 mi55 min Calm G 1 63°F 1016.7 hPa
OBXC1 13 mi55 min 63°F 62°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 13 mi55 min WSW 1.9 G 2.9
AAMC1 - 9414750 - Alameda, CA 16 mi61 min SW 1.9 G 2.9 63°F 67°F1016.8 hPa
LNDC1 16 mi55 min SW 2.9 G 4.1 63°F 1016.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi61 min W 5.1 G 7 64°F 1016.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 19 mi33 min WNW 12 G 14 61°F1017.1 hPa
UPBC1 24 mi61 min WNW 7 G 11
MZXC1 - 9415102 - Martinez-Amorco CA 24 mi55 min WNW 8.9 G 11 64°F 68°F1016.4 hPa
PCOC1 - 9415144 - Port Chicago, CA 28 mi55 min WSW 8.9 G 12 65°F 68°F1016 hPa
RTYC1 - 9414523 - Redwood City, CA 33 mi55 min NW 5.1 G 8 63°F 73°F1017.4 hPa
SFXC1 - San Francisco Bay Reserve, CA 34 mi58 min NW 4.1
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 36 mi55 min WNW 11 G 14 67°F 1015.8 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 42 mi33 min NW 9.7 G 12 60°F 1017.3 hPa60°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 47 mi33 min NW 16 G 19 56°F 56°F1016.5 hPa
46214 - Point Reyes, CA (029) 49 mi47 min 60°F5 ft

Wind History for San Francisco, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA16 mi68 minN 010.00 miFair64°F60°F88%1016.3 hPa
Oakland, Metro Oakland International Airport, CA22 mi50 minWSW 410.00 miMostly Cloudy68°F57°F68%1016.8 hPa
San Francisco, San Francisco International Airport, CA22 mi47 minWNW 910.00 miMostly Cloudy64°F57°F78%1016.7 hPa
Petaluma Municipal Airport, CA24 mi48 minW 510.00 miFair66°F57°F73%1016.6 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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3E5CalmNW6CalmCalmE44N3NE4CalmCalmCalmCalmCalmCalmCalm
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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
Sat -- 01:58 AM PDT     6.00 feet High Tide
Sat -- 06:55 AM PDT     Sunrise
Sat -- 08:02 AM PDT     0.54 feet Low Tide
Sat -- 09:30 AM PDT     Moonrise
Sat -- 02:24 PM PDT     6.22 feet High Tide
Sat -- 07:10 PM PDT     Sunset
Sat -- 08:36 PM PDT     0.23 feet Low Tide
Sat -- 08:58 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.75.765.64.73.31.90.90.50.91.83.14.45.56.26.15.342.51.10.40.30.92

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
Sat -- 02:41 AM PDT     -0.00 knots Slack
Sat -- 05:39 AM PDT     -2.25 knots Max Ebb
Sat -- 06:55 AM PDT     Sunrise
Sat -- 09:29 AM PDT     Moonrise
Sat -- 09:36 AM PDT     0.00 knots Slack
Sat -- 11:40 AM PDT     1.97 knots Max Flood
Sat -- 02:54 PM PDT     -0.01 knots Slack
Sat -- 06:01 PM PDT     -2.43 knots Max Ebb
Sat -- 07:10 PM PDT     Sunset
Sat -- 08:58 PM PDT     Moonset
Sat -- 10:04 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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21.50.7-0.3-1.4-2.1-2.2-1.9-1.3-0.50.51.71.91.60.9-0.1-1.2-2.1-2.4-2.2-1.6-0.9-0.11.3

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
Ground Weather Radar Station Sacramento, CA
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