Wednesday, January22, 2020
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Marine Weather and Tides
American Canyon, 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 7:19AMSunset 5:21PM Wednesday January 22, 2020 3:22 PM PST (23:22 UTC) Moonrise 5:43AMMoonset 3:26PM Illumination 5% Phase: Waning Crescent; Moon at 27 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- 249 Pm Pst Wed Jan 22 2020
Tonight..N winds up to 10 kt.
Thu..NE winds up to 10 kt.
Thu night..NW winds up to 10 kt.
Fri..SW winds up to 10 kt.
Fri night..NW winds up to 10 kt. A chance of rain.
Sat..S winds up to 10 kt. Rain likely.
Sun..W winds 5 to 10 kt. Rain likely.
PZZ500 249 Pm Pst Wed Jan 22 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Seas will gradually decrease overnight into Thursday with light winds over the waters. Generally light winds will persist Friday and Saturday with high pressure over the region. However a long period swell will pass through waters Friday and Saturday with potentially dangerous surf conditions. The next storm approaches later Saturday into Sunday with increasing southery winds followed by another large northwest swell behind the front Sunday into Monday.


7 Day Forecast for Marine Location Near American Canyon, CA
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location: 38.21, -122.3     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 222250 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 250 PM PST Wed Jan 22 2020

Synopsis. Look for dense fog to develop late tonight into Thursday morning. A low impact weather system is expected to move into Norcal during the day on Thursday into Friday. A wetter weather system is forecast for the weekend.

Discussion. Ern Pac ridge axis along the W Coast will be moving across the CWA tonight and across the Great Basin on Thu. The cross mountain flow over the coastal range mtns has induced some downslope clearing on the Wrn side of the CWA while low level moisture remained trapped below the low level/subsidence inversion causing low clouds to linger on the E side of the Valley into the Sierra foothills. Moisture profiles suggest clearing over most of the area this evening before low clouds and fog are likely to reform overnite. After midnight, the HREF increases the probabilities of LIFR wx (stratus/fog) from OVE southward into the SJV, and by morning some patchy F+ (dense fog) is likely.

An upper trof, preceded by a cold front over the Ern Pac, is forecast to move into/across the Pac NW, brushing Norcal, Thu nite into Fri. For Norcal, this will be a weak system with minimal QPF, high snow levels and no significant impacts. QPF is expected to range from less than a tenth of an inch in the Valley to as much as a quarter to a third of an inch in the Nrn mtns. Snow levels at/above 7 kft at the onset when most of the precip will fall are expected to lower to 5.5 in the north to 7 kft in the south at the end of the event when precip is diminishing Fri afternoon and evening.

A wetter system is forecast to move into Norcal this weekend, beginning late Fri nite. The details concerning this system are discussed below. JHM

EXTENDED DISCUSSION (Saturday THROUGH Wednesday).

A somewhat subtle shortwave over the eastern Pacific will bring an extended period of wet weather this weekend. While the wave itself does not reach the coast until Saturday night, warm advection precipitation will be ongoing, particularly north of I-80, during the daytime. Given the warm nature of this system, snow levels are likely to be quite high at the onset, generally around 8,000 feet. Unlike the preceding storms, there should decent access to moisture with precipitable water values of 0.75 to 1.00 inch. A vast majority of the GEFS members favor a weak Atmospheric River event which is consistent with pattern recognition.

The leading edge of the upper trough/height falls arrive late Saturday/early Sunday bringing a band of moderate precipitation through the region. Some trailing instability showers are possible during the remainder of Sunday with coverage and intensity dependent on the timing of the frontal passage. Expecting anywhere from 0.25 to 0.50 inches of rainfall over the Delta and Valley, although closer to an inch in the northern Sacramento Valley. The usual upslope orographics will augment numbers in the foothills and mountains with 1 to 2 inches likely in these locations. While snow levels begin high, they will drop to mountain pass level by Sunday morning with mountain travel delays possible. 4 to 8 inches of snow is being forecast at 7,000 feet and above over the Sierra-Cascade range, higher over mountain summits. By Sunday evening into the following morning, snow levels drop to around 5,000 to 6,000 feet with lingering showers remaining in the picture.

Looking to next week, broad ridging extends over the region while the storm track shifts up to the Pacific Northwest. Models continue to advertise some light warm advection precipitation at times, mainly up toward the northern mountains. Given the ridge in place, do not anticipate any significant impacts aside from scattered showers and additional cloud cover over these regions. Overall high temperatures stay close to climatology with mid to upper 50s in the Valley and Delta, 40s in the upper foothills, and 30s into the higher elevation mountains. ~BRO

AVIATION.

Local MVFR/IFR conditions over Norcal expected to improve to VFR this evening, before IFR/LIFR conditions increase in the Valley from OVE-MOD due to F/F+ after 06z-08z. Conditions improve Thu afternoon as chance of R- spreads over the area mainly N of the I-80 corridor Thu afternoon/night. Winds mostly light.

STO WATCHES/WARNINGS/ADVISORIES. None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 11 mi59 min 53°F 1023.7 hPa
UPBC1 15 mi65 min ENE 4.1 G 5.1
MZXC1 - 9415102 - Martinez-Amorco CA 15 mi53 min 57°F 51°F1023.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 15 mi98 min E 4.1
PCOC1 - 9415144 - Port Chicago, CA 17 mi53 min 57°F 50°F1023.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi59 min 60°F 1024.1 hPa
RCMC1 - 9414863 - Richmond, CA 21 mi53 min 53°F1023.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 23 mi42 min Calm 58°F 1024 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 25 mi53 min 60°F 1023.6 hPa
OBXC1 28 mi53 min 56°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 28 mi53 min 53°F 1023.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 28 mi71 min NNW 7 G 8
LNDC1 29 mi53 min 57°F 1023.6 hPa
FTPC1 - 9414290 - San Francisco, CA 29 mi53 min 54°F1023.9 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 29 mi59 min 54°F 1022.8 hPa
PXSC1 29 mi59 min 54°F 54°F
AAMC1 - 9414750 - Alameda, CA 30 mi53 min 52°F1023.7 hPa
46237 - San Francisco Bar, CA (142) 34 mi53 min 53°F9 ft
PRYC1 - 9415020 - Point Reyes, CA 39 mi53 min 53°F1023.6 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 43 mi33 min NW 3.9 G 7.8 54°F 55°F9 ft1024.5 hPa
RTYC1 - 9414523 - Redwood City, CA 49 mi53 min 59°F 53°F1023.8 hPa

Wind History for Union Pacific Rail Road Bridge (UPRR), CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Napa, Napa County Airport, CA1 mi29 minWSW 410.00 miFair59°F44°F58%1022.8 hPa
Novato / Gnoss Field, CA14 mi28 minN 010.00 miFair61°F39°F45%1023.7 hPa
Petaluma Municipal Airport, CA17 mi48 minN 010.00 miA Few Clouds61°F46°F59%1024 hPa
Fairfield / Travis Air Force Base, CA20 mi85 minNE 610.00 miFair64°F45°F51%1024 hPa
Concord, Buchanan Field, CA21 mi30 minN 610.00 miFair63°F48°F60%1022.2 hPa
Vacaville Nut Tree Airport, CA22 mi30 minN 610.00 miFair62°F45°F54%1024.2 hPa

Link to 5 minute data for KAPC

Wind History from APC (wind in knots)
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Last 24hrS10S9S6SW5S5S3S6SW4SW5CalmCalmCalmCalmN3N3NE3N5N6N6N44SW4SW6SW4
1 day agoCalmCalmE3CalmCalmCalmCalmE3CalmNE3E3NE3E4SE6CalmE3E3CalmCalmCalmS9S8S10S8
2 days agoE16
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SE8E5E8E5NE6SE3E7E6NE9E10E8E5E5SW4SW3

Tide / Current Tables for Brazos Drawbridge, Napa River, Carquinez Strait, California
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Brazos Drawbridge
Click for Map
Wed -- 12:40 AM PST     5.44 feet High Tide
Wed -- 05:29 AM PST     2.49 feet Low Tide
Wed -- 05:42 AM PST     Moonrise
Wed -- 07:21 AM PST     Sunrise
Wed -- 11:13 AM PST     7.49 feet High Tide
Wed -- 03:25 PM PST     Moonset
Wed -- 05:20 PM PST     Sunset
Wed -- 06:38 PM PST     -0.68 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.35.44.943.12.62.63.34.45.76.87.57.36.453.21.50.2-0.6-0.6-0.10.92.33.7

Tide / Current Tables for Mare Island Strait, So Vallejo, San Pablo Bay, California Current
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Mare Island Strait
Click for Map
Wed -- 12:35 AM PST     -0.00 knots Slack
Wed -- 02:05 AM PST     -0.97 knots Max Ebb
Wed -- 04:44 AM PST     0.00 knots Slack
Wed -- 05:42 AM PST     Moonrise
Wed -- 07:20 AM PST     Sunrise
Wed -- 08:13 AM PST     1.58 knots Max Flood
Wed -- 11:19 AM PST     -0.00 knots Slack
Wed -- 02:50 PM PST     -2.52 knots Max Ebb
Wed -- 03:25 PM PST     Moonset
Wed -- 05:20 PM PST     Sunset
Wed -- 07:06 PM PST     0.00 knots Slack
Wed -- 10:38 PM PST     1.44 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.4-0.4-1-0.9-0.50.20.91.41.61.510.3-0.8-1.8-2.3-2.5-2.3-1.7-0.9-0.10.61.11.41.4

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 (18,4,5,8)
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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.