Tuesday, April7, 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 6:39AMSunset 7:35PM Tuesday April 7, 2020 1:06 PM PDT (20:06 UTC) Moonrise 6:24PMMoonset 5:48AM Illumination 100% Phase: Full Moon; Moon at 15 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- 829 Am Pdt Tue Apr 7 2020
Today..W winds around 5 kt, increasing to 5 to 15 kt this afternoon.
Tonight..W winds 5 to 15 kt.
Wed..SW winds 5 to 15 kt.
Wed night..SW winds 5 to 15 kt.
Thu..SW winds 5 to 15 kt.
Thu night..W winds up to 10 kt.
Fri..SW winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt.
PZZ500 829 Am Pdt Tue Apr 7 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will increase across the coastal waters this afternoon and into tomorrow as an upper low slowly exits the region. Locally breezy winds are expected this afternoon and evening over the Monterey bay and along the inner coastal waters from pigeon point to point pinos as well as overnight north of point reyes. A long period southwest and a long period west to northwest swell will arrive this morning and continue into tomorrow before decreasing.


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 071732 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1032 AM PDT Tue Apr 7 2020

SYNOPSIS. An upper low moving slowly south just off the California coast will maintain shower chances today, although many areas will likely remain dry. Shower chances will persist primarily across areas south of San Jose into Wednesday and Thursday as the upper low will be slow to exit the region. A warming and drying trend is forecast late in the week and into the weekend.

DISCUSSION. As of 3:30 AM PDT Tuesday . Early morning satellite imagery shows that the upper low responsible for yesterday's showers and thunderstorms remains centered just off the Central Coast, and is moving slowly to the south. Radar indicates that most shower activity is currently located offshore, although a few light showers are being detected over the North Bay. Models agree that shower potential will persist across much of our forecast area today as vorticity centers rotate around the upper low, but shower activity is expected to be more widely scattered today compared to yesterday, and thunderstorms are far less likely. The greatest chance of precipitation today is across Monterey and San Benito Counties during this afternoon and evening. The other short-term item of note is morning fog. Fog has formed in the North and East Bay Valleys early this morning, and expect patchy fog to persist in these areas through about mid morning.

Shower chances will continue through at least Wednesday, primarily across areas south of San Jose, as the upper low moves inland across southern California. Models often struggle with the track of cutoff lows, and this case is no exception. There has been a lot of model disagreement concerning the exact track of the low around midweek. Latest models now forecast to the low to move to near Las Vegas by Wednesday night and then retrograde back into California on Thursday. Thus, we may very well see an increase in shower activity on Thursday, especially across the south. And, if the 00Z ECMWF verifies with its more northerly forecast track of the retrograding low, then showers could develop as far north as San Francisco on Thursday. Given the model inconsistencies regarding the track of the upper low beyond 36 hours, forecast confidence decreases greatly by Thursday.

Additional rainfall this week is expected to be less than a half inch, with many locations, especially across the north, expected to see very little accumulation, or none at all.

Yesterday's temperatures were as much as 15 degrees below normal, but we should see temperatures rebound today as the cold core of the upper low moves away from our area, and also because most areas will see more sun today. Temperatures should continue to gradually warm through the week, except perhaps on Thursday if the upper low retrogrades as forecast. Warming and drying are expected in all areas from Friday through the weekend, and also into early next week, as the upper low finally moves well off to our east and an upper ridge builds just off the West Coast.

AVIATION. as of 10:32 AM PDT Tuesday . for 18Z TAFs. This morning's low clouds have cleared out leaving some higher level clouds across the North Bay at about 10,000 ft AGL. Current obs show VFR conditions at all sites. Expecting VFR to prevail through this evening before models show a region wide increase in low level moisture overnight. MVFR/IFR cigs then forecast to prevail for most if not all sites through the rest of the taf period. Guidance suggests these low clouds may linger around the Bay Area into the early afternoon. Additionally, patchy fog may also return to the North Bay and portions of the East Bay. Generally light winds this morning turning onshore in the afternoon around 10-15 kt.

Radar shows some lingering showers over portions of Sonoma County this morning, though most areas should remain dry most of today. High res models show some possible showers returning tonight in the Monterey Bay Region south of San Jose.

Vicinity of KSFO . VFR through the evening before low clouds are expected to develop across the Bay Area and then persist through tomorrow morning. Low confidence on exact timing of cloud development. May be a few stray showers in the vicinity but otherwise dry conditions forecast. Variable winds again this morning to turn onshore this afternoon around 10-15 kt.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR into this evening before low clouds are forecast to develop over the Monterey Region. MVFR/IFR conditions then expected through the rest of the taf period. Additionally, high res models are showing showers developing late tonight and into early tomorrow morning. Light winds this morning with locally breezy SE winds down the Salinas Valley. Onshore winds this afternoon 10-15 kt.

MARINE. as of 08:29 AM PDT Tuesday . Northwest winds will increase across the coastal waters this afternoon and into tomorrow as an upper low slowly exits the region. Locally breezy winds are expected this afternoon and evening over the Monterey Bay and along the inner coastal waters from Pigeon Point to Point Pinos as well as overnight north of Point Reyes. A long period southwest and a long period west to northwest swell will arrive this morning and continue into tomorrow before decreasing.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Mry Bay from 3 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm from 3 PM



PUBLIC FORECAST: Dykema AVIATION: AS MARINE: AS

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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 mi54 min N 2.9 G 6 56°F 1019.9 hPa
PCOC1 - 9415144 - Port Chicago, CA 29 mi48 min W 2.9 G 5.1 56°F 58°F1019.8 hPa
UPBC1 33 mi48 min W 5.1 G 6
MZXC1 - 9415102 - Martinez-Amorco CA 33 mi48 min W 5.1 G 6 54°F 57°F1020.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 35 mi81 min WNW 1.9
LNDC1 38 mi48 min WSW 5.1 G 6 53°F 1020.3 hPa
AAMC1 - 9414750 - Alameda, CA 39 mi48 min W 4.1 G 5.1 53°F 57°F1020.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 40 mi54 min W 2.9 G 5.1
OKXC1 - 9414776 - Oakland (Berth 34), CA 40 mi48 min NW 2.9 G 2.9 52°F 1020.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi48 min W 2.9 G 5.1 52°F 1020.1 hPa
OBXC1 41 mi48 min 52°F 44°F
RTYC1 - 9414523 - Redwood City, CA 41 mi48 min N 4.1 G 5.1 53°F 58°F1020.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 42 mi48 min SW 2.9 G 6 55°F 1020.6 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi48 min N 2.9 G 2.9 52°F 1019.5 hPa
PXSC1 44 mi48 min 52°F 48°F
RCMC1 - 9414863 - Richmond, CA 45 mi48 min WSW 1.9 G 2.9 53°F 56°F1020.1 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 47 mi38 min ESE 1.9 53°F 1021 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi48 min 58°F

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA16 mi73 minN 010.00 miFair56°F44°F65%1019.6 hPa
Stockton, Stockton Metropolitan Airport, CA18 mi71 minVar 610.00 miPartly Cloudy60°F45°F58%1019.5 hPa

Link to 5 minute data for KLVK

Wind History from LVK (wind in knots)
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Last 24hrE7CalmE4CalmE7S4NW6W4CalmCalmCalmE3E3CalmS5E3CalmCalmCalmSW4CalmSW4Calm3
1 day agoS7W4W8W7S6W4SW3SW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE8NE8E9
2 days agoSW10S10SW7SW9SW8SW8SW6S5SW4NW4NW5SW6SW6S3W5E3CalmS11
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Tide / Current Tables for Borden Highway Bridge, Old River, San Joaquin River, California
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Borden Highway Bridge
Click for Map
Tue -- 12:45 AM PDT     -0.04 feet Low Tide
Tue -- 06:41 AM PDT     Sunrise
Tue -- 06:47 AM PDT     Moonset
Tue -- 06:55 AM PDT     3.09 feet High Tide
Tue -- 01:10 PM PDT     0.12 feet Low Tide
Tue -- 07:06 PM PDT     3.10 feet High Tide
Tue -- 07:25 PM PDT     Moonrise
Tue -- 07:35 PM PDT     Sunset
Tue -- 07:35 PM PDT     Full Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.1-00.30.91.72.42.93.12.92.31.50.90.40.10.30.81.52.32.93.12.92.41.71

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
Tue -- 01:03 AM PDT     0.01 knots Slack
Tue -- 03:47 AM PDT     0.74 knots Max Flood
Tue -- 06:40 AM PDT     Sunrise
Tue -- 06:47 AM PDT     Moonset
Tue -- 07:16 AM PDT     -0.00 knots Slack
Tue -- 10:18 AM PDT     -0.51 knots Max Ebb
Tue -- 01:32 PM PDT     0.00 knots Slack
Tue -- 04:13 PM PDT     0.74 knots Max Flood
Tue -- 07:24 PM PDT     Moonrise
Tue -- 07:28 PM PDT     -0.00 knots Slack
Tue -- 07:34 PM PDT     Sunset
Tue -- 07:35 PM PDT     Full Moon
Tue -- 10:20 PM PDT     -0.54 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-00.40.70.70.60.40.1-0.2-0.4-0.5-0.5-0.4-0.10.20.60.70.70.50.2-0.2-0.4-0.5-0.5

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 (16,3,4,5)
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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.