Monday, August10, 2020
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Marine Weather and Tides
Penn Valley, 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 6:14AMSunset 8:08PM Monday August 10, 2020 11:47 AM PDT (18:47 UTC) Moonrise 10:54PMMoonset 11:53AM Illumination 57% Phase: Waning Gibbous; Moon at 21 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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7 Day Forecast for Marine Location Near Penn Valley, CA
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location: 39.21, -121.2     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 101000 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 300 AM PDT Mon Aug 10 2020

SYNOPSIS. Moderate heat risk persists today over the northern half of the Sacramento Valley. Afternoon thunderstorms possible over higher terrain, mainly Sierra Nevada, through Tuesday. Near normal temperatures midweek, then warming up again by next weekend.

DISCUSSION. Skies are clear across interior NorCal early this morning other than some lingering remnant high clouds left over from Sunday afternoon's Sierra thunderstorms. IR difference imagery shows stratus has returned to much of the NorCal coast, and profiler data indicates the marine layer has deepened slightly. The Delta Breeze is stronger at Travis AFB compared to 24 hours ago, but cooling has yet to be realized. Elsewhere, current temperatures are running slightly warmer across the region compared to early Sunday, and generally range from the lower 50s in the colder mountain valleys to the mid 80s across milder portions of the Sacramento Valley.

Little overall change expected today as mid/upper COL lingers across NorCal. Enough elevated moisture/instability remains within this area of weak flow for a few thunderstorms again later today over the mountains as daytime heating triggers deep convection. Isolated storms may be possible further to the west and north today, over the northern Coast Range and extreme southern Cascade Range.

High temperatures today will be a mixed bag as the return of the Delta Breeze spreads cooling into the Delta region, and slightly cooling into the Sacramento and Stockton areas. Elsewhere, hot weather will continue today with highs similar to Sunday's.

Weak trough develops along the West Coast on Tuesday and Wednesday, pushing most of the late day thunderstorm activity back well to the east of the forecast area by Wednesday. The trough will also result in strengthening onshore flow by this evening which will bring cooler temperatures (back to around average for early to mid-August) for a couple of days.

Trough forecast to weaken by Thursday leading to slight warming as onshore flow slackens.

EXTENDED DISCUSSION (Friday THROUGH Monday). Upper COL over interior NorCal Friday retrogrades offshore as upper ridging from the Desert SW builds over the CWA through the weekend into early next week. Dry weather expected with a gradual warming trend. Greatest departure from normals, upwards of 10 plus degrees by next Monday, will be over the southern half of the CWA under stronger subsidence.

AVIATION. VFR conds ovr intr NorCal nxt 24 hrs exc isold MVFR poss in tstms omtns btwn 20z-03z tops up to 400-450. SWly sfc wnd gsts 30-35 kts poss vcnty of Delta bcmg 25G40 kts tngt and Tues. Lcl Sly sfc wnd gsts to 25 kts in Sac Vly poss aft 00z Tue.

STO WATCHES/WARNINGS/ADVISORIES. None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 82 mi62 min W 12
PCOC1 - 9415144 - Port Chicago, CA 91 mi53 min W 16 G 19 68°F 69°F1012.2 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Nevada County Air Park, CA10 mi52 minN 010.00 miFair84°F53°F35%1016.6 hPa
Marysville, Beale Air Force Base, CA14 mi1.8 hrsSW 410.00 miFair83°F54°F38%1011 hPa
Auburn Municipal Airport, CA19 mi52 minVar 49.00 miFair88°F59°F38%1013.5 hPa
Marysville, Yuba County Airport, CA21 mi54 minVar 310.00 miFair86°F55°F35%1011.5 hPa
Lincoln Regional Karl Harder Field, CA22 mi52 minN 010.00 miFair86°F53°F33%1010.8 hPa

Link to 5 minute data for KGOO

Wind History from GOO (wind in knots)
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1 day agoNW634CalmSW5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW6Calm
2 days ago463SW5Calm4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Mon -- 12:10 AM PDT     2.67 feet High Tide
Mon -- 06:16 AM PDT     Sunrise
Mon -- 08:26 AM PDT     0.56 feet Low Tide
Mon -- 12:38 PM PDT     2.01 feet High Tide
Mon -- 12:53 PM PDT     Moonset
Mon -- 07:36 PM PDT     0.46 feet Low Tide
Mon -- 08:05 PM PDT     Sunset
Mon -- 11:56 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.72.62.42.11.71.30.90.70.60.61.11.61.921.91.71.30.90.60.50.50.81.52.2

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Mon -- 06:16 AM PDT     Sunrise
Mon -- 06:56 AM PDT     0.56 feet Low Tide
Mon -- 11:29 AM PDT     2.01 feet High Tide
Mon -- 12:53 PM PDT     Moonset
Mon -- 06:06 PM PDT     0.46 feet Low Tide
Mon -- 08:05 PM PDT     Sunset
Mon -- 11:31 PM PDT     2.72 feet High Tide
Mon -- 11:56 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.62.421.51.10.80.60.60.81.31.7221.91.61.20.80.60.50.611.72.42.7

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 (14,3,4,5)
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Ground Weather Radar Station Beal AFB, CA
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weather_mapweather_map weather_map

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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.