Monday, September21, 2020
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Marine Weather and Tides
August, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:51AMSunset 7:04PM Monday September 21, 2020 3:19 AM PDT (10:19 UTC) Moonrise 10:52AMMoonset 9:10PM Illumination 17% Phase: Waxing Crescent; Moon at 4 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- 204 Am Pdt Mon Sep 21 2020
Today..SW winds 5 to 15 kt. Gusts up to 25 kt this afternoon.
Tonight..SW winds 5 to 15 kt with gusts up to 25 kt.
Tue..SW winds 10 to 20 kt with gusts up to 25 kt.
Tue night..W winds 5 to 15 kt.
Wed..SW winds 10 to 20 kt with gusts up to 25 kt.
Wed night..W winds 5 to 15 kt.
Thu..W winds 10 to 20 kt with gusts up to 25 kt.
Fri..W winds 10 to 20 kt with gusts up to 25 kt.
PZZ500 204 Am Pdt Mon Sep 21 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 continue over the northern waters into tonight as surface high pressure over the eastern pacific slowly moves towards the west coast. Winds along the inner coastal waters will increase later today before breezy winds subside over the outer waters tomorrow. Mixed seas will persist with a shorter period northwest swell and a long period southwest swell. A more robust northwest swell will arrive across the waters late this week.


7 Day Forecast for Marine Location Near August, CA
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location: 37.95, -121.28     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 210515 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 1015 PM PDT Sun Sep 20 2020

SYNOPSIS. Chance of showers over the Shasta and Coastal mountains Thursday and Friday, otherwise dry weather expected. Above normal temperatures through Monday cooling to below normal the remainder of the workweek.

DISCUSSION. The Evening Update: With light winds overnight, the smoke/haze layer is likely to "hover around" into Mon morning. Later in the day on Mon, the smoke/haze should drift NEwd as the steering flow turns SWly ahead of the approaching Pac trof.

Autumnal equinox is Tue Sep 22 at 0630 PDT, and we will enjoy some pleasant fall-like wx and temps in Norcal. Good possibility of some stratus intruding into the Vly Tue morning correlating with the onset of the change in seasons.

But wait, what's this? Another post-equinox heat wave? Look for well above normal temps this coming weekend into early next week, with mid to upper 90s in the Valley and the upper limits of the NBM flirting with 100 deg Sun, Mon and Tue due to super strong ridging dominating Wrn NOAM. JHM

Previous Discussion. Temperatures trending warmer today by 2 to 7 degrees at this time and currently no flow coming in from the Delta. The Delta breeze will increase this evening becoming 10 to 15 mph that will help to cool the Sacramento region down overnight into the mid 50s to lower 60s.

Zonal flow over the region will change the next couple of days as a weak system moves into the Pacific Northwest Monday and Tuesday. This will bring slight cooling on Monday with a little better cooling for the interior Tuesday as temperatures cool back into the mid 80s for the valley. The trough over the West coast should help to keep wind blowing through the Delta throughout both days generally in the 10 to 20 mph range.

Zonal flow returns Wednesday as another trough moves into the Pacific Northwest with little change in temperatures over Tuesday highs.

EXTENDED DISCUSSION (Thursday THROUGH Sunday). Guidance continues to agree with the faster solution for trough passage on Thursday, with precip likely clipping the northern portion of our forecast area. PoP remain light over Shasta County and along the coastal range, but it doesn't look like we'll be able to squeeze much moisture with this. By Friday, the trough shifts to the intermountain west and flattens into a more northwest flow orientation leading to dry weather returning to the area. Behind it, deterministic and ensemble guidance remain in agreement with a stronger upper high developing over the eastern Pacific. This starts to shift over to NorCal on Sunday, which would be the start of a stretch of above normal temperatures. The latest NBM guidance has the area about 5 to 12 degrees above normal for this time of year for Sunday, but as of right now no records are at risk. Valley temperatures are generally in the low to mid 90s while the foothills span the 80s. Of course, this will be something we'll keep our eyes on.

AVIATION.

VFR conditions next 24 hours at TAF sites. Localized areas of MVFR conditions near wildfires and over the western Sacramento Valley. Winds generally under 10 kts at TAF sites.

STO WATCHES/WARNINGS/ADVISORIES. None.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi50 min WNW 8 G 11 70°F 1010.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 41 mi50 min WSW 8.9 G 9.9 62°F 69°F1010.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 43 mi95 min WNW 8
MZXC1 - 9415102 - Martinez-Amorco CA 45 mi50 min WNW 9.9 G 12 63°F 70°F1011 hPa
UPBC1 45 mi50 min WNW 9.9 G 12
AAMC1 - 9414750 - Alameda, CA 55 mi50 min W 5.1 G 6 61°F 68°F1012.2 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stockton, Stockton Metropolitan Airport, CA3 mi25 minSSE 38.00 miFair62°F51°F67%1010.5 hPa

Link to 5 minute data for KSCK

Wind History from SCK (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmSW33W3Calm456NW7N9
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Tide / Current Tables for Blackslough Landing, San Joaquin River, California
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Blackslough Landing
Click for Map
Mon -- 04:10 AM PDT     0.06 feet Low Tide
Mon -- 06:53 AM PDT     Sunrise
Mon -- 09:58 AM PDT     3.14 feet High Tide
Mon -- 11:52 AM PDT     Moonrise
Mon -- 03:51 PM PDT     0.59 feet Low Tide
Mon -- 07:03 PM PDT     Sunset
Mon -- 09:30 PM PDT     3.89 feet High Tide
Mon -- 10:10 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.31.50.80.30.10.20.81.62.433.132.41.81.10.70.60.91.62.53.43.83.83.5

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
Mon -- 01:07 AM PDT     -0.57 knots Max Ebb
Mon -- 05:00 AM PDT     0.00 knots Slack
Mon -- 06:52 AM PDT     Sunrise
Mon -- 07:37 AM PDT     0.58 knots Max Flood
Mon -- 10:59 AM PDT     -0.00 knots Slack
Mon -- 11:52 AM PDT     Moonrise
Mon -- 01:30 PM PDT     -0.40 knots Max Ebb
Mon -- 04:30 PM PDT     0.01 knots Slack
Mon -- 07:03 PM PDT     Sunset
Mon -- 07:14 PM PDT     0.79 knots Max Flood
Mon -- 10:10 PM PDT     Moonset
Mon -- 10:43 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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-0.5-0.6-0.5-0.4-0.2-00.40.60.60.50.3-0-0.2-0.4-0.4-0.3-0.10.20.60.80.70.50.2-0.1

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
Ground Weather Radar Station Sacramento, CA
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weather_mapweather_map weather_map


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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.