Wednesday, May27, 2020
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Marine Weather and Tides
Bay Point, 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 5:47AMSunset 8:23PM Wednesday May 27, 2020 2:18 AM PDT (09:18 UTC) Moonrise 9:09AMMoonset 12:00AM Illumination 27% Phase: Waxing Crescent; Moon at 5 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- 906 Pm Pdt Tue May 26 2020
Tonight..SW winds 5 to 15 kt.
Wed..SW winds 10 to 20 kt with gusts up to 25 kt.
Wed night..SW winds 5 to 15 kt.
Thu..SW winds 10 to 20 kt with gusts up to 25 kt.
Thu night..SW winds 10 to 20 kt with gusts up to 25 kt.
Fri..SW winds 10 to 20 kt with gusts up to 25 kt. A chance of showers.
Sat..SW winds 5 to 15 kt. A chance of showers.
PZZ500 906 Pm Pdt Tue May 26 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Breezy northwest winds will persist over the northern waters through Wednesday. These winds will generate steep fresh swell resulting in hazardous seas conditions for small crafts. Generally light to moderate northwest winds are expected elsewhere with winds generally easing across the waters late this week as an upper ridge sits over california and an upper low slowly approaches from the southwest. Mixed seas will continue with a short period northwest swell and a longer period southwest swell. A longer period northwest swell will arrive later this week.


7 Day Forecast for Marine Location Near Bay Point, CA
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location: 38.04, -121.94     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 262203 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 303 PM PDT Tue May 26 2020

Synopsis. High pressure will continue to bring hot temperatures to the region along with a moderate to high heat risk through Thursday. A pattern change is expected on Friday, which will lead to cooler temperatures and chances of mountain showers and thunderstorms over the weekend.

DISCUSSION. Northern CA remains under a 585 dm ridge. This is bringing another hot day with current valley temps in the mid 90s to just over 100. These temps are running about 2 to 6 degrees warmer than yesterday this time and we should see highs top out a few degrees warmer than yesterday. A short wave trough digging through BC is helping to bring some high clouds to the northern part of the area but these clouds will have little to no impact on temps this afternoon. The high clouds will slowly push south this evening but will mainly dissipate by the time they reach the Sacramento area. Little to no delta breeze is expected this evening/overnight and overnight lows are going to bring only little relief from the heat as we see them fall into the mid 60s to lower 70s tonight.

Hot temperatures are going to continue on Wednesday and Thursday as we remain under the ridge. We will see increased Delta flow starting Wednesday and especially on Thursday. This will help to bring slightly cooler highs to Delta influenced areas but it will only be a few degrees.

With the prolonged heat in the forecast, the general population should take precautions to prevent heat related illnesses given the potential for moderate to very high heat risk. Stay hydrated, limit outdoor activities, and check on sensitive groups. If you plan on enjoying the outdoors, be sure to practice heat safety and a cold water safety if visiting area waterways. Area waterways continue to run very cold and fast, and precautions should be taken if heading to the water.

A closed off upper level low currently spinning about 1150 miles off the coast of the Baja of CA will bring changes to our weather on Friday as it pushes toward NorCal. We will see the start of a cooling trend with valley highs falling back into the 90s. The forcing will be on the weak side for Friday but we do see some instability build in generally above 500 mb. This will bring a slight chance for t-storms in the higher elevations during the afternoon and evening with better shower chances into the weekend. Soundings are dry below 500 mb and are inverted V type. This could lead to low precip t-storms with gusty winds. Right now the t-storm threat overall looks low for Friday.

-CJM

EXTENDED DISCUSSION (Saturday THROUGH Tuesday). Early Saturday morning, the well advertised closed low will be offshore of the San Francisco Bay Area with impressive heights running around 558 dm. Per ensemble output from the NAEFS, 500-mb height anomalies are likely to run in the 2 to 2.5 standard deviation below average range. Spread is interestingly quite low in the ensemble spaghetti plots with a track just off the coast or through north- central CA. This dynamic system will enhance shower chances accompanied by a risk for elevated thunderstorms on Saturday morning into the afternoon, including over the Sacramento Valley. Lifted indices drop below zero indicative of the level of instability accompanying this upper low passage. Any forming showers and thunderstorms will lift northward with the mean steering flow. Given the time of year, some of these showers may initially struggle to produce much precipitation which will limit rainfall amounts. Once the higher-resolution models capture this time period, more details of coverage and intensity of these storms will be realized.

By the following morning, this upper low is forecast to have opened up and lifted into the Pacific Northwest. Meanwhile, a broad longwave trough fills out the eastern Pacific which maintains a chance for showers on Sunday into early next week. Much of the focus should remain over the foothills and mountains given the combination of upstream weak shortwaves and upslope flow.

Regarding temperatures, the mentioned upper low will cool things off considerably as Valley/Delta highs drop into the upper 70s/lower 80s which is roughly a 20 to 25 degree drop from earlier in the week. Such readings will be around 3 to 6 degrees below late May/early June climatology. ~BRO

AVIATION. VFR conditions over Interior NorCal the next 24 hours with surface winds generally below 12 knots.

STO WATCHES/WARNINGS/ADVISORIES. Excessive Heat Warning until 7 PM PDT Thursday for Carquinez Strait and Delta-Central Sacramento Valley-Motherlode-Mountains Southwestern Shasta County to Western Colusa County-Northeast Foothills/Sacramento Valley-Northern Sacramento Valley-Southern Sacramento Valley.

Excessive Heat Warning until 7 PM PDT Thursday for Northern San Joaquin Valley.

Excessive Heat Warning from 7 AM to 7 PM PDT Thursday for Shasta Lake Area / Northern Shasta County.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 3 mi48 min WNW 9.9 G 12 76°F 1009.8 hPa
PCOC1 - 9415144 - Port Chicago, CA 5 mi48 min WSW 7 G 8 72°F 70°F1010.3 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 10 mi48 min W 5.1 G 5.1 71°F 69°F1010.8 hPa
UPBC1 10 mi48 min WNW 5.1 G 6
SFXC1 - San Francisco Bay Reserve, CA 12 mi93 min WNW 1.9
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 17 mi48 min N 4.1 G 4.1 68°F 1010.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 24 mi48 min SW 13 G 16 62°F 1011.6 hPa
LNDC1 25 mi48 min N 5.1 G 7 65°F 1011.5 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi48 min WNW 6 G 6 63°F 1011.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 26 mi48 min Calm G 1.9
RCMC1 - 9414863 - Richmond, CA 26 mi48 min SSW 2.9 G 5.1 65°F 63°F1011 hPa
OBXC1 27 mi48 min 64°F 59°F
AAMC1 - 9414750 - Alameda, CA 27 mi48 min N 4.1 G 6 66°F 68°F1011.6 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 29 mi48 min WSW 5.1 G 6 65°F 1010.5 hPa
PXSC1 29 mi48 min 64°F 55°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 29 mi38 min Calm 64°F 1011 hPa
FTPC1 - 9414290 - San Francisco, CA 32 mi48 min 61°F
RTYC1 - 9414523 - Redwood City, CA 40 mi48 min N 2.9 G 5.1 68°F 74°F1012 hPa
46237 - San Francisco Bar, CA (142) 41 mi48 min 59°F5 ft

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA7 mi25 minW 310.00 miFair75°F55°F52%1009.2 hPa
Fairfield / Travis Air Force Base, CA17 mi80 minSSW 1010.00 miFair74°F56°F54%1010.4 hPa
Napa, Napa County Airport, CA22 mi24 minSSW 510.00 miFair65°F60°F84%1010.2 hPa
Vacaville Nut Tree Airport, CA23 mi25 minN 010.00 miFair68°F57°F70%1009.7 hPa
Livermore, Livermore Municipal Airport, CA24 mi25 minN 010.00 miFair72°F52°F50%1010.7 hPa

Link to 5 minute data for KCCR

Wind History from CCR (wind in knots)
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Last 24hrN4CalmN3NW4S3CalmCalmCalmNE5N5NW8N5NW8W12NW12W10W10W6CalmCalmS6S4CalmW3
1 day agoN3CalmCalmSE33SW3CalmCalmN3E643NW4NW8W7W10W14SW6SW4S5CalmCalmNW3Calm
2 days agoCalmCalmCalmCalmS4SW4CalmCalmCalm3N45NW6NW7
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Tide / Current Tables for Mallard Island Ferry Wharf, Suisun Bay, California
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Mallard Island Ferry Wharf
Click for Map
Wed -- 12:14 AM PDT     Moonset
Wed -- 12:34 AM PDT     1.76 feet Low Tide
Wed -- 05:48 AM PDT     Sunrise
Wed -- 05:48 AM PDT     4.12 feet High Tide
Wed -- 10:08 AM PDT     Moonrise
Wed -- 01:48 PM PDT     -0.40 feet Low Tide
Wed -- 08:21 PM PDT     Sunset
Wed -- 08:54 PM PDT     3.06 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.81.82.12.63.444.13.83.22.41.50.60-0.3-0.4-0.20.41.21.92.52.93.12.92.5

Tide / Current Tables for Stake Point .9 Mi NNW, Suisun Bay, California Current
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Stake Point .9 Mi NNW
Click for Map
Wed -- 12:15 AM PDT     Moonset
Wed -- 01:07 AM PDT     0.00 knots Slack
Wed -- 04:40 AM PDT     0.77 knots Max Flood
Wed -- 05:48 AM PDT     Sunrise
Wed -- 07:08 AM PDT     -0.00 knots Slack
Wed -- 10:08 AM PDT     Moonrise
Wed -- 10:36 AM PDT     -0.99 knots Max Ebb
Wed -- 02:42 PM PDT     0.00 knots Slack
Wed -- 06:38 PM PDT     0.77 knots Max Flood
Wed -- 08:21 PM PDT     Sunset
Wed -- 10:18 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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-0.2-00.20.50.70.70.50.1-0.3-0.7-0.9-1-0.8-0.6-0.30.10.40.70.80.80.70.40.1-0.2

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 Sacramento, CA (5,6,7,8)
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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.