Wednesday, February19, 2020
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Marine Weather and Tides
Mountain House, 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 6:49AMSunset 5:49PM Wednesday February 19, 2020 5:45 AM PST (13:45 UTC) Moonrise 4:29AMMoonset 2:13PM Illumination 18% Phase: Waning Crescent; Moon at 25 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- 237 Am Pst Wed Feb 19 2020
Today..NE winds around 5 kt, becoming W this afternoon.
Tonight..NW winds up to 10 kt.
Thu..NE winds 5 to 15 kt.
Thu night..N winds around 5 kt.
Fri..NE winds up to 10 kt.
Fri night..SW winds 10 to 20 kt with gusts up to 30 kt.
Sat..W winds 5 to 15 kt.
Sun..W winds 5 to 15 kt.
PZZ500 237 Am Pst Wed Feb 19 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light northwest winds are forecast to prevail over the waters today. A weakening cold front and upper level trough will approach the offshore waters late week that may result in a few isolated showers. A moderate northwest swell will persist through the week along with a light southerly swell.


7 Day Forecast for Marine Location Near Mountain House, CA
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location: 37.83, -121.57     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 191128 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 328 AM PST Wed Feb 19 2020

SYNOPSIS. Unseasonably mild and dry conditions are likely to persist over much of the region through the forecast period. The only chance of precipitation will be over the Central Coast Friday into Saturday with the potential for isolated showers, yet widespread rainfall is unlikely.

DISCUSSION. as of 03:05 AM PST Wednesday . The return of onshore flow along the coast during the past 12 hours or so has allowed for an increase in boundary layer moisture. As a result, low clouds and patchy fog have developed locally inland across the Sonoma Valley, along the San Francisco Peninsula and around the Monterey Bay. Expecting these clouds to continue to become more widespread along the coast and adjacent coastal valleys through the morning per trends in satellite imagery. This will keep temperatures from falling much below the lower/middle 40s while clear conditions across the interior will allow for temperatures to bottom out in the middle/upper 30s. Expecting this pattern to also allow for slightly cooler conditions near the coast this afternoon while interior locations again warm into the middle/upper 60s with a few lower 70s possible.

Not expecting much change heading into Thursday with conditions to be similar to today, night/morning low clouds near the coast and across the adjacent coastal valleys with warmer afternoon temperatures across the interior. By late week, a mid/upper level cut-off low will develop off of the northern California coast within a deepening trough. The developing mid/upper level low will then drop southward before ejecting eastward toward the southern California coast. As this occurs, moisture will wrap around the low and advect inland over portions of the Central Coast late Friday into Saturday. With this, cannot rule out isolated showers over portions interior portions of the Central Coast, mainly Monterey and San Benito Counties. However, widespread rainfall is unlikely with any precipitation being light and isolated in nature.

The aforementioned system will then exit the region this weekend as another mid/upper level trough drops into the Pacific Northwest. Forecast models have all trended much drier for our region as this system stays well to our north with ridging expected to build offshore. Thus, ongoing dry weather conditions with temperatures above seasonal averages are likely to continue heading into early next week.

AVIATION. as of 3:28 AM PST Wednesday . For 12Z TAFs. Infrared satellite imagery shows a several areas of low clouds that have developed overnight, impacting locations such as Santa Rosa, the San Mateo County Coast, and the Monterey Peninsula. Could see some additional low cloud development between now and sunrise, but not anticipating widespread. Generally light winds are expected today at the terminals.

Vicinity of KSFO . Low clouds have thus far remained on the western half of the San Bruno Gap away from the terminal. There may be some additional low cloud development between now and sunrise, but confidence is low. Light winds this morning will become west to northwest this afternoon around 10 kt.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Areas of low clouds continue to impact the Monterey Bay Area this morning with IFR ceilings reported at MRY. The stratus may expand southward into the Salinas Valley and impact SNS between now and sunrise. VFR conditions will then prevail mid/late morning and through the day. Light offshore winds this morning will become onshore later today.

MARINE. as of 3:05 AM PST Wednesday . Light northwest winds are forecast to prevail over the waters today. A weakening cold front and upper level trough will approach the offshore waters late week that may result in a few isolated showers. A moderate northwest swell will persist through the week along with a light southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. None.

PUBLIC FORECAST: RGass AVIATION: Rowe MARINE: Rowe

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 22 mi45 min WNW 8.9 G 12 49°F 1018.4 hPa (+1.0)
PCOC1 - 9415144 - Port Chicago, CA 29 mi45 min SSW 2.9 G 5.1 45°F 53°F1018.5 hPa (+0.8)
UPBC1 33 mi45 min NW 1.9 G 4.1
MZXC1 - 9415102 - Martinez-Amorco CA 33 mi45 min Calm G 2.9 48°F 54°F1018.9 hPa (+0.8)
SFXC1 - San Francisco Bay Reserve, CA 35 mi60 min NNW 1.9
LNDC1 38 mi45 min Calm G 1 49°F 1018.7 hPa (+0.0)
AAMC1 - 9414750 - Alameda, CA 39 mi45 min Calm G 1.9 48°F 56°F1018.7 hPa (+0.0)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 40 mi45 min WSW 7 G 8
OKXC1 - 9414776 - Oakland (Berth 34), CA 40 mi45 min E 1 G 1.9 48°F 1018.8 hPa (+0.0)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi45 min WSW 1.9 G 2.9 47°F 1018.7 hPa (+0.6)
OBXC1 41 mi45 min 50°F 48°F
RTYC1 - 9414523 - Redwood City, CA 41 mi45 min S 1 G 2.9 43°F 56°F1019.3 hPa (+0.4)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 42 mi45 min WSW 2.9 G 6 50°F 1019 hPa (+0.0)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi45 min WSW 2.9 G 7 49°F 1017.7 hPa (+0.0)
PXSC1 44 mi45 min 50°F 47°F
RCMC1 - 9414863 - Richmond, CA 45 mi45 min WNW 4.1 G 4.1 47°F 54°F1018.4 hPa (+0.3)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 47 mi34 min Calm 45°F 1019 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi51 min WSW 2.9 G 5.1 49°F 54°F1018.7 hPa

Wind History for Port Chicago, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA16 mi52 minE 310.00 miFair34°F27°F76%1018.7 hPa
Stockton, Stockton Metropolitan Airport, CA18 mi50 minN 010.00 miFair37°F30°F76%1018.3 hPa

Link to 5 minute data for KLVK

Wind History from LVK (wind in knots)
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Last 24hrE7E5SE76E93E8E6E7E4E5E8NE4E5E3E3CalmNE3CalmCalmE3E3NE3E3
1 day agoS3CalmCalmCalmCalm3N11N9NW12N9N8N7CalmNE3--E8NE3CalmE6E5SE6E10SE6SE6
2 days agoCalmCalmW4SW9SW8S7S5SW5NW7SW5W6SW7W8CalmS4CalmN3CalmE3CalmCalmCalmCalmCalm

Tide / Current Tables for Borden Highway Bridge, Old River, San Joaquin River, California
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Borden Highway Bridge
Click for Map
Wed -- 04:15 AM PST     2.65 feet High Tide
Wed -- 04:29 AM PST     Moonrise
Wed -- 06:51 AM PST     Sunrise
Wed -- 09:18 AM PST     1.29 feet Low Tide
Wed -- 02:13 PM PST     Moonset
Wed -- 03:19 PM PST     3.27 feet High Tide
Wed -- 05:49 PM PST     Sunset
Wed -- 10:55 PM PST     -0.12 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.61.21.82.42.62.62.21.81.51.31.41.72.22.73.13.33.22.92.41.81.10.50-0.1

Tide / Current Tables for Vulcan Island .5 mi E, San Joaquin River, California Current
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Vulcan Island .5 mi E
Click for Map
Wed -- 01:45 AM PST     0.60 knots Max Flood
Wed -- 04:28 AM PST     Moonrise
Wed -- 04:49 AM PST     -0.00 knots Slack
Wed -- 06:51 AM PST     Sunrise
Wed -- 07:07 AM PST     -0.27 knots Max Ebb
Wed -- 09:24 AM PST     0.00 knots Slack
Wed -- 12:20 PM PST     0.61 knots Max Flood
Wed -- 02:11 PM PST     Moonset
Wed -- 03:43 PM PST     -0.00 knots Slack
Wed -- 05:48 PM PST     Sunset
Wed -- 07:53 PM PST     -0.61 knots Max Ebb
Wed -- 11:38 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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0.30.50.60.50.2-0-0.2-0.3-0.2-0.10.20.50.60.60.50.2-0.1-0.3-0.5-0.6-0.6-0.5-0.4-0.1

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 (8,2,3,4)
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Ground Weather Radar Station Sacramento, CA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.