Thursday, August13, 2020
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Marine Weather and Tides
Concord, 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 6:20AMSunset 8:04PM Thursday August 13, 2020 2:17 AM PDT (09:17 UTC) Moonrise 12:04AMMoonset 2:53PM Illumination 30% Phase: Waning Crescent; Moon at 24 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- 912 Pm Pdt Wed Aug 12 2020
Tonight..SW winds 5 to 15 kt.
Thu..SW winds 5 to 15 kt.
Thu night..SW winds 5 to 15 kt.
Fri..SW winds 5 to 15 kt.
Fri night..SW winds 5 to 10 kt.
Sat..SW winds 10 to 20 kt with gusts up to 25 kt.
Sat night..SW winds 5 to 15 kt.
Sun..W winds 10 to 20 kt with gusts up to 25 kt.
Mon..W winds 10 to 20 kt with gusts up to 25 kt.
PZZ500 912 Pm Pdt Wed Aug 12 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Expect gusty northwest winds mainly over the northern coastal waters. Northwest winds decrease later in the week. Seas will remain mixed with a short period northwest swell and a longer period southerly swell.


7 Day Forecast for Marine Location Near Concord, CA
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location: 38, -122     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 130607 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 1105 PM PDT Wed Aug 12 2020

SYNOPSIS. A strong heating trend is expected this week with widespread triple digit highs by late week through the weekend. This is forecast to bring the longest heat wave of the season so far. Isolated thunderstorms are possible over the Sierra Crest south of I-80. Above normal temperatures are forecast to continue next week.

DISCUSSION. Significant heat wave setting up for Norcal with chance of seeing 9 consecutive days of triple digit heat for DTS (just eaked out 100 at DTS today). If this occurred it would be a tie for 2nd with multiple other years. Most recent stretch for DTS is 8 consecutive days ending 6/23/2017 and ending 7/30/2016. All time record is 11 consecutive days ending 7/26/2006. (For RDD the record is 23 consecutive days of triple digit heat ending 8/14/2005).

Sly flow will increase late Thu and Fri between the offshore closed cut-off low near 131W and the strong high pressure cell near the 4- Corners/Desert SW. Look for subtropical moisture (mid/high clouds) to spread Nwd into Norcal increasing the heat and humidity. This will begin the multi-day heat wave. It will feel more humid, and stifling to Norcal denizens. Mtn convection will be on the increase as several waves of subtropical moisture work Nwd over the coming days, especially for the Sierra as well.

Cloud cover, or lack of cloud cover, will challenge temp forecasting. Persistent cloud cover could keep temps from reaching record levels, but will also tend to elevate mins. JHM

Previous Discussion.

After a cool start, temperatures are are generally about 5 degrees warmer than yesterday early this afternoon. Highs in the Valley are expected in the mid 90s.

Main story over the next several days will be the warming trend heading into the weekend. Upper level ridge over the desert southwest will gradually build westward by the end of the week. As a result, the region will experience day-to- day warming into the weekend with triple digit heat becoming widespread as by Friday. Friday afternoon highs have trended warmer, with Valley highs 102-106, so the Excessive Heat Watch has been expanded in time to start Friday afternoon. The Watch continues through early Sunday evening.

Further warming is forecast on Saturday as heat risks reach the moderate to high levels for most communities in the Sacramento Valley and northern San Joaquin Valley. In fact, some locations in the southern Sacramento Valley – such as Sacramento – will be approaching daily record highs around Saturday. The current forecast on Saturday calls for highs around 101-105 deg F in the southern Sacramento Valley / northern San Joaquin Valley, and 103-108 deg F in the northern Sacramento Valley, corresponding to about 8 to 15 deg F above middle August normal climatology. Overnight temperatures are forecast to remain warm with many Valley and adjacent foothill locations remaining in the 70s to low 80s for Friday and Saturday nights. Sunday may be slightly less hot as a shortwave brushes by to the north and heights lower slightly. Overall, though, the ridge pattern will be persistent and will bring a long period of heat.

Southerly flow will bring some monsoonal moisture northward late in the week into early next week. Forcing is limited, but afternoon instability could be enough for some isolated thunderstorms on the Sierra Crest south of I-80.

EXTENDED DISCUSSION (Sunday THROUGH Wednesday). Concluding the weekend, a sprawling ridge of high pressure over the Four Corners will makes its westward move toward the southwestern U.S. At the same time, an offshore trough will open up while shearing as it moves toward coastal Oregon late Sunday night. Some residual moisture will likely lift northeastward with this system from what is currently Tropical Storm Elida. Precipitable water values rise into the 1 to 1.25 inch range into early next week with much of the moisture rooted in the mid to upper levels. This may introduce some shower and thunderstorm activity to the Sierra crest, mainly south of Highway 50 across sections of Alpine and Tuolumne Counties.

The mentioned upper ridge will encourage the continuation of hot weather with highs running around 10 to 15 degrees above climatology. By early next week, the center of the dome of high pressure will be around the Nevada/Utah/Arizona border. Mid-level heights are expected to rise to around 594-597 dm with 850-mb temperatures up to 26-29C. This will perpetuate the threat of excessive heat as high temperatures remain in the 100-105 degree range. Moreover, little overnight relief is anticipated as low temperatures stay in the 70s, locally near 80 degrees in some Sierra foothill locations. Given the continued hot weather, drink plenty of fluids, stay in air-conditioned rooms, and never leave children or pets unattended in vehicles. ~BRO

AVIATION. VFR conditions over interior NorCal the next 24 hours. Southwesterly surface wind gusts 20-25 knots possible in the vicinity of the Delta. Local southerly surface wind gusts to 20 knots in the northern Sacramento Valley possible through 06Z tonight.

STO WATCHES/WARNINGS/ADVISORIES. Excessive Heat Watch from Friday afternoon through Sunday evening for Carquinez Strait and Delta-Central Sacramento Valley- Motherlode-Mountains Southwestern Shasta County to Western Colusa County-Northeast Foothills/Sacramento Valley-Northern Sacramento Valley-Northern San Joaquin Valley-Southern Sacramento Valley.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PCOC1 - 9415144 - Port Chicago, CA 4 mi48 min WSW 8 G 11 62°F 71°F1011.5 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 7 mi48 min WNW 11 G 15 62°F 69°F1012.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 7 mi48 min NW 16 G 18 66°F 1010.7 hPa
UPBC1 7 mi48 min WNW 12 G 16
SFXC1 - San Francisco Bay Reserve, CA 14 mi93 min WNW 9.9
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 15 mi48 min W 7 G 11 61°F 1012.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 20 mi48 min SW 11 G 14 60°F 1012.9 hPa
LNDC1 21 mi48 min N 2.9 G 4.1 61°F 1012.6 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 22 mi48 min NW 6 G 8 59°F 1012.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 22 mi48 min WNW 1.9 G 2.9
AAMC1 - 9414750 - Alameda, CA 22 mi48 min WNW 4.1 G 5.1 60°F 70°F1012.8 hPa
RCMC1 - 9414863 - Richmond, CA 22 mi48 min SSW 4.1 G 5.1 60°F 67°F1012.5 hPa
OBXC1 23 mi48 min 60°F 58°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 25 mi48 min WSW 1.9 G 4.1 58°F 1011.7 hPa
PXSC1 25 mi48 min 59°F 58°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 25 mi36 min Calm 57°F 1013 hPa
FTPC1 - 9414290 - San Francisco, CA 28 mi48 min SW 1.9 G 6 56°F 62°F1013 hPa
RTYC1 - 9414523 - Redwood City, CA 36 mi48 min WNW 5.1 G 6 61°F 76°F1013.3 hPa
46237 - San Francisco Bar, CA (142) 37 mi78 min 60°F4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 48 mi28 min WNW 3.9 G 5.8 55°F 56°F5 ft1013.3 hPa54°F

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA3 mi25 minNNW 410.00 miFair62°F55°F80%1010.5 hPa
Fairfield / Travis Air Force Base, CA20 mi20 minSW 1310.00 miFair65°F51°F62%1011.4 hPa
Napa, Napa County Airport, CA21 mi24 minN 010.00 miFair57°F53°F87%1011.6 hPa
Livermore, Livermore Municipal Airport, CA23 mi25 minN 010.00 miFair69°F46°F44%1011.8 hPa
Hayward, Hayward Air Terminal, CA24 mi24 minWNW 410.00 miFair61°F53°F75%1013.3 hPa
Oakland, Metro Oakland International Airport, CA24 mi25 minN 010.00 miFair60°F54°F80%1012.8 hPa

Link to 5 minute data for KCCR

Wind History from CCR (wind in knots)
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Last 24hrW7W5W5SW6SW3SW4W4NW6NW10NW10NW12NW10NW8NW12NW13NW10NW9NW7CalmCalmCalmNW4NW6N4
1 day agoSW7SW6SW7SW7SW7SW7W13W12W12W13W13W12W10
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2 days agoCalmNW6NW7NW7W4NW3NW8NW10NW10NW10NW13W10W11
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Tide / Current Tables for Port Chicago, Suisun Bay, California
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Port Chicago
Click for Map
Thu -- 01:04 AM PDT     Moonrise
Thu -- 05:20 AM PDT     0.70 feet Low Tide
Thu -- 06:22 AM PDT     Sunrise
Thu -- 11:32 AM PDT     3.35 feet High Tide
Thu -- 03:42 PM PDT     2.23 feet Low Tide
Thu -- 03:53 PM PDT     Moonset
Thu -- 08:03 PM PDT     Sunset
Thu -- 09:48 PM PDT     4.98 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.52.721.410.70.81.21.72.42.93.33.332.62.32.22.533.74.44.954.8

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
Thu -- 01:03 AM PDT     Moonrise
Thu -- 02:54 AM PDT     -0.73 knots Max Ebb
Thu -- 06:21 AM PDT     Sunrise
Thu -- 07:07 AM PDT     0.00 knots Slack
Thu -- 11:06 AM PDT     0.57 knots Max Flood
Thu -- 01:39 PM PDT     -0.00 knots Slack
Thu -- 03:41 PM PDT     -0.26 knots Max Ebb
Thu -- 03:52 PM PDT     Moonset
Thu -- 05:35 PM PDT     0.00 knots Slack
Thu -- 08:02 PM PDT     Sunset
Thu -- 09:10 PM PDT     0.78 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.2-0.5-0.7-0.7-0.7-0.6-0.3-00.20.40.50.60.50.2-0.1-0.2-0.3-0.10.10.40.70.80.70.4

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.