Thursday, July16, 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 5:57AMSunset 8:32PM Thursday July 16, 2020 6:47 AM PDT (13:47 UTC) Moonrise 1:34AMMoonset 4:08PM Illumination 15% Phase: Waning Crescent; Moon at 26 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- 232 Am Pdt Thu Jul 16 2020
.small craft advisory in effect from 1 pm pdt this afternoon through this evening...
Today..SW winds 10 to 20 kt...increasing to 15 to 20 kt with gusts up to 30 kt in the afternoon.
Tonight..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.
Fri night..SW winds 5 to 15 kt.
Sat..SW winds 10 to 20 kt with gusts up to 25 kt.
Sat night..SW winds 5 to 15 kt.
Sun..SW winds 5 to 15 kt.
Mon..SW winds 5 to 15 kt.
PZZ500 232 Am Pdt Thu Jul 16 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Low pressure off of the coast will continue to bring generally light to moderate southerly flow over the waters through Friday. Meanwhile, locally stronger northwest winds will develop across the northern offshore waters Thursday night into Friday. Gusty winds will once again be possible through the golden gate and west delta Thursday afternoon. The sea state will continue a moderate southerly swell with a moderate period.


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 160930 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 230 AM PDT Thu Jul 16 2020

SYNOPSIS. Not as hot today and Friday, then hotter weather returns for the weekend. A few late day thunderstorms are expected along the Sierra crest the next several days. Keep an eye to the sky if in the mountains.

DISCUSSION. Clear skies cover the region early this morning. Remnant clouds from Wednesday afternoon's thunderstorms over the northern Sierra Nevada is moving east across Nevada while IR difference imagery is showing extensive stratus along the coast extending well inland, and now spreading through the Carquinez Strait. Coastal profiler data indicate the marine layer has deepened to around 2k ft, and there's a chance a little stratus will make it inland into the Sacramento region around sunrise.

Stronger short-wave trough currently approaching the PacNW will begin to lower heights aloft, and thickness, today across NorCal leading to a few degrees of synoptic cooling. The feature will also induce stronger onshore flow by this afternoon which will result in several more degrees of cooling to portions of the Central Valley and foothills. Onshore flow will continue on Friday with a few more degrees of cooling expected across the area.

Another round of isolated late day deep convection is expected across the northern Sierra today, possibly extending about as far north as the Mt. Lassen area. Weak westerly flow aloft will likely keep storms near and east of the Sierra crest. Storms are forecast to be retreat to areas mainly south of Lake Tahoe on Friday.

Hotter weather returns over the weekend as high pressure builds northwestward from the Desert Southwest. This will likely suppress the marine layer, but not completely wipe it out. Most of the Central Valley will see highs near or above the century mark, especially the northern Sacramento Valley where moderate heat risk will return. Isolated late day deep convection will likely be limited to the far southeast corner of the forecast area over the Sierra Nevada to the south of Lake Tahoe.

EXTENDED DISCUSSION (Monday THROUGH Thursday). Current ensemble runs indicate the Four Corners high pressure will shift east out of California Monday and Tuesday as a weak upper level low approaches from the eastern Pacific. Temperatures will begin the week hot, especially in the northern Sacramento Valley, before slowly cooling each day to near or slightly below normal by Wednesday as the upper low makes its way onshore. The chance of high elevation Sierra thunderstorms is weakening as guidance moves the monsoon high further to the east than previous runs. However, current models indicate there may still be enough moisture and instability for isolated thunderstorms Monday and Tuesday afternoon. HEC

AVIATION. VFR conditions expected except for stratus intrusion into Carquinez Strait thru 18z Thursday. Local southwest winds 15-25 kts with gusts up to 25-35 kts through the Carquinez Strait and Delta. Elsewhere winds generally less than 10 kts, increasing after 00z Friday up to 15 kt in the Sacramento Valley. Thin smoke layer from the Mineral wildfire west of Coalinga, CA remains possible across the northern San Joaquin/southern Sacramento Valley.

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 mi78 min WSW 9.9 G 13
UPBC1 15 mi78 min W 16 G 19
SFXC1 - San Francisco Bay Reserve, CA 15 mi63 min W 15
MZXC1 - 9415102 - Martinez-Amorco CA 15 mi78 min W 12 G 16 68°F
PCOC1 - 9415144 - Port Chicago, CA 17 mi78 min WSW 16 G 22 69°F
RCMC1 - 9414863 - Richmond, CA 21 mi78 min SSW 4.1 G 8 64°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi78 min WSW 7 G 12
TIBC1 - Tiburon Pier, San Francisco Bay, CA 23 mi32 min NNW 4.1 56°F 1013 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 25 mi78 min WNW 16 G 22
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 28 mi78 min W 9.9 G 11
OKXC1 - 9414776 - Oakland (Berth 34), CA 28 mi78 min W 7 G 9.9
LNDC1 29 mi78 min W 6 G 8.9
FTPC1 - 9414290 - San Francisco, CA 29 mi78 min WSW 5.1 G 8.9 63°F
AAMC1 - 9414750 - Alameda, CA 30 mi78 min W 6 G 8.9 68°F
46237 - San Francisco Bar, CA (142) 34 mi48 min 58°F3 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 43 mi28 min SE 5.8 G 7.8 55°F 55°F1012.9 hPa55°F
RTYC1 - 9414523 - Redwood City, CA 49 mi78 min NW 4.1 G 5.1 75°F

Wind History for Union Pacific Rail Road Bridge (UPRR), CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Napa, Napa County Airport, CA1 mi54 minW 810.00 miOvercast58°F54°F87%1011.2 hPa
Novato / Gnoss Field, CA14 mi53 minN 010.00 miOvercast59°F55°F88%1012.5 hPa
Petaluma Municipal Airport, CA17 mi53 minW 610.00 miOvercast57°F57°F100%1012.5 hPa
Fairfield / Travis Air Force Base, CA20 mi1.8 hrsSW 2310.00 miFair and Windy57°F52°F83%1010.1 hPa
Concord, Buchanan Field, CA21 mi55 minVar 310.00 miMostly Cloudy58°F53°F84%1010.4 hPa
Vacaville Nut Tree Airport, CA22 mi55 minWSW 510.00 miFair62°F52°F70%1009.9 hPa

Link to 5 minute data for KAPC

Wind History from APC (wind in knots)
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Last 24hrNW6NW7W6SW5S8S8S12S15S16S17S18S19S16S16SW12W9W9W11W11W11W12W11W11W8
1 day agoSW7SW10SW9SW13S12SW12SW14S15S15S18
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Tide / Current Tables for Brazos Drawbridge, Napa River, Carquinez Strait, California
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Brazos Drawbridge
Click for Map
Thu -- 02:32 AM PDT     Moonrise
Thu -- 05:59 AM PDT     Sunrise
Thu -- 06:03 AM PDT     0.40 feet Low Tide
Thu -- 12:41 PM PDT     4.48 feet High Tide
Thu -- 05:08 PM PDT     Moonset
Thu -- 05:16 PM PDT     2.45 feet Low Tide
Thu -- 08:31 PM PDT     Sunset
Thu -- 11:05 PM PDT     6.78 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.953.72.41.30.60.40.61.32.133.94.44.54.13.52.82.52.63.34.35.46.46.8

Tide / Current Tables for Mare Island Strait, So Vallejo, San Pablo Bay, California Current
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Mare Island Strait
Click for Map
Thu -- 01:54 AM PDT     -2.17 knots Max Ebb
Thu -- 02:33 AM PDT     Moonrise
Thu -- 05:59 AM PDT     Sunrise
Thu -- 06:26 AM PDT     0.00 knots Slack
Thu -- 10:00 AM PDT     1.12 knots Max Flood
Thu -- 12:42 PM PDT     -0.00 knots Slack
Thu -- 02:04 PM PDT     -0.73 knots Max Ebb
Thu -- 04:41 PM PDT     0.00 knots Slack
Thu -- 05:07 PM PDT     Moonset
Thu -- 08:12 PM PDT     1.49 knots Max Flood
Thu -- 08:30 PM PDT     Sunset
Thu -- 11:15 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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-1.5-2-2.2-2-1.7-1-0.30.30.711.10.90.4-0.3-0.7-0.6-0.30.20.81.31.51.40.90.2

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 (9,2,3,4)
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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.