Wednesday, January20, 2021
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L-36.com

Marine Weather and Tides
Oakdale, 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 7:13AMSunset 5:15PM Wednesday January 20, 2021 2:03 PM PST (22:03 UTC) Moonrise 11:36AMMoonset 12:00AM Illumination 50% Phase: First Quarter Moon; Moon at 7 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 839 Am Pst Wed Jan 20 2021
Today..SE winds up to 10 kt, becoming nw this afternoon.
Tonight..NW winds up to 10 kt.
Thu..S winds up to 10 kt.
Thu night..SW winds 5 to 10 kt. A slight chance of showers.
Fri..NW winds 5 to 15 kt with gusts up to 25 kt. A slight chance of showers.
Fri night..N winds 5 to 15 kt.
Sat..NW winds up to 10 kt.
Sun..W winds 5 to 15 kt. Showers likely.
PZZ500 839 Am Pst Wed Jan 20 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure will continue dry weather today and tonight over northern california. A cold front arrives Thursday night into Friday with gusty northwest winds and a slight chance of showers. A colder, unstable northwest pattern will bring an upper level low to the coastal waters and bays Sunday with another round of showers and gusty northwest winds.


7 Day Forecast for Marine Location Near Oakdale, CA
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location: 37.76, -120.84     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 201130 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 330 AM PST Wed Jan 20 2021

SYNOPSIS. Dry weather will Less windy conditions expected today and Thursday, then rain and snow chances return for the end of the week into next week.

DISCUSSION. Clear skies and cooler temperatures are present across the region early this morning. Winds are much lighter than 24 hours ago as surface pressure gradients have relaxed and stronger winds aloft have decreased, but some areas with gusts in the 20s and 30s mph remain over the foothills and higher elevations.

Dry weather will continue today and Thursday with lighter winds. Highs will be a little cooler in the valley, but milder across higher terrain as cold advection wanes. Generally clear skies will allow for a better chance for valley frost tonight as dew points recover.

Over the course of the rest of the week, max temperatures will gradually cool through the 60s in the Valley, with temps returning to near normal by Fri with highs in the 50s in the Valley, 30s to 40s in the foothills and mtns. Min temps will cool into the 30s in the Valley, and teens and 20s in the mtns for the rest of the week.

Although there are model timing/detail issues later in the week, we are reasonably certain in the chances of rain/mountain snow on Fri in Norcal. There is enough model agreement that a seasonably cold upper trof will move into Norcal on Fri giving the CWA a chance of precip. The heaviest amounts are forecast over the Sierra (liquid amounts up to a half inch or so, and 3-6 inches or so of snow), but only a few hundredths to a tenth of an inch in the Valley. The system may linger into Sat, especially over the Sierra, but the Valley is likely to clear from N to S as the system drops Swd during the day. However, model differences create some uncertainty as to the exact timing, i.e. afternoon or evening. May see a thunderstorm or two late Friday over the southeast corner of the forecast area as daytime heating coincides with the upper trough passage.

EXTENDED DISCUSSION (Sunday THROUGH Wednesday). Long wave trough sets up along the West Coast allowing short wave troughs to drop into it resulting in unsettled weather through the extended forecast period. Below normal temperatures expected with snow levels in the foothills.

AVIATION. VFR conds ovr intr NorCal nxt 24 hrs. Sfc wnd genly blo 12 kts exc lcl NEly sfc wnd gsts up to 35 kts poss in ern fthls til 18z.

STO WATCHES/WARNINGS/ADVISORIES. None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PCOC1 - 9415144 - Port Chicago, CA 67 mi45 min NE 2.9 G 4.1 62°F 52°F1018.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 70 mi78 min SSW 4.1 65°F 1020 hPa22°F
RTYC1 - 9414523 - Redwood City, CA 75 mi45 min NW 1.9 G 1.9 64°F 55°F1019.3 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Modesto City-County Airport - Harry Sham Field, CA11 mi70 minNW 710.00 miFair62°F23°F22%1018.6 hPa
Stockton, Stockton Metropolitan Airport, CA24 mi68 minNW 610.00 miFair64°F28°F26%1018.9 hPa

Link to 5 minute data for KMOD

Wind History from MOD (wind in knots)
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Last 24hrCalmCalmNW14
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W10NW9W11W12W11NW9NW13NW11NW10NW9NW10NW85SE4CalmCalmNW8NW8NW10NW7NW7
1 day agoNW19
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2 days agoCalmCalmNW3CalmCalmCalmCalmCalmSE4SE3E3E3CalmCalmCalmNW5NW7NW6NW8NW16
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Tide / Current Tables for Grant Line Canal (drawbridge), Old River, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Grant Line Canal (drawbridge)
Click for Map
Wed -- 12:00 AM PST     Moonset
Wed -- 01:01 AM PST     2.57 feet High Tide
Wed -- 07:05 AM PST     0.56 feet Low Tide
Wed -- 07:17 AM PST     Sunrise
Wed -- 11:38 AM PST     Moonrise
Wed -- 01:03 PM PST     First Quarter
Wed -- 01:51 PM PST     3.34 feet High Tide
Wed -- 05:16 PM PST     Sunset
Wed -- 08:48 PM PST     0.79 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.52.62.52.11.61.10.70.60.71.11.72.42.93.23.33.22.72.11.61.20.90.811.4

Tide / Current Tables for Brandt Bridge, San Joaquin River, California Current
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Brandt Bridge
Click for Map
Wed -- 12:59 AM PST     -0.00 knots Slack
Wed -- 04:41 AM PST     -0.82 knots Max Ebb
Wed -- 07:17 AM PST     Sunrise
Wed -- 08:11 AM PST     0.00 knots Slack
Wed -- 11:03 AM PST     0.66 knots Max Flood
Wed -- 11:37 AM PST     Moonrise
Wed -- 01:03 PM PST     First Quarter
Wed -- 02:03 PM PST     -0.00 knots Slack
Wed -- 05:15 PM PST     Sunset
Wed -- 06:03 PM PST     -0.83 knots Max Ebb
Wed -- 09:44 PM PST     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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0.3-0-0.3-0.6-0.8-0.8-0.7-0.5-0.10.30.60.70.60.40-0.3-0.6-0.8-0.8-0.8-0.6-0.20.10.3

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




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Disclaimer:
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.