Wednesday, May23, 2018 L-36.com


Marine Weather and Tides
Penn Valley, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:44AMSunset 8:21PM Wednesday May 23, 2018 5:22 PM PDT (00:22 UTC) Moonrise 1:29PMMoonset 1:47AM Illumination 67% Phase: Waxing Gibbous; Moon at 9 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 232101
afdsto
area forecast discussion
national weather service sacramento ca
201 pm pdt Wed may 23 2018

Synopsis
Afternoon and evening thunderstorms possible mainly over higher
terrain this week. These are expected to extend through the
valley late in the week. Slightly cooler than normal temperatures
continue across most of the region this week warming to above
normal early next week.

Discussion
Upper level low pressure system shifting eastward has created
scattered showers and thunderstorms across the sierra this
afternoon as residual moisture continues to be present across
northern california. Breezy conditions for some locations across
the valley with strongest winds in the delta area.

An upper trough currently off the coast will approach Thursday and
move inland late Thursday night into Friday. This will bring the
potential for widespread showers, including across the valley and
delta for Friday morning. Some afternoon and evening
thunderstorms are also expected, with unstable conditions from a
cool core low for the mountains. Snow levels will drop enough to
allow some snow at pass levels south of highway 50. Latest model
runs have higher QPF values for the mountains south of highway 50,
and have brough snow accumulations above 8000 feet to between 3
and 6 inches of snow expected. High temperatures trend well below
normal Thursday and Friday. Friday highs across the valley are
expected to be only in the low 70s, about 10 degrees below normal.

Showers linger across much of the area Saturday morning, then
gradually shift eastward as the upper low exits to the east.

Mountain showers and thunderstorms are possible again in the
afternoon and evening hours. Outdoor planners should have some
contingency plans in case of disruptions from developing storms.

.Extended discussion (Sunday through Wednesday)
an upper level low will be tracked eastward out of norcal and will
be replaced by a ridge to start the extended period. This will
bring warming conditions for the second half of the holiday
weekend. Highs on Sunday will be in the mid 80s to lower 90s for
the valley while higher elevations reach the 60s and 70s. Things
look a bit warmer on Monday and we may see our first 90 of the
year in the sac area. Tuesday will likely be our warmest day in
the period with mid 90's across the valley and 60s and 70s in the
mountains. Isolated t-storms will be possible in the higher
elevations on Sunday with little to no t-storm threats Monday and
Tuesday. A trough will move into the region mid to late week and
that will bring cooler temperatures along with rain and t-storm
chances to the higher elevations.

-cjm

Aviation
Vfr conditions are expected at the TAF sites the next 24 hours.

Scattered showers and t-storms over the mountains will continue
through 5z, MVFR ifr in the vicinity of any this activity. Marine
stratus making it into the sacramento area looks less likely
Thursday morning but a few clouds around 1000 to 2000 feet will be
possible between 9z and 16z. Breezy southerly winds this
afternoon 10-15 knots gusting to 20 knots will begin to diminish
during the evening but will remain breezy in the delta.

-cjm

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 mi98 min W 12 63°F 1013 hPa53°F
PCOC1 - 9415144 - Port Chicago, CA 91 mi53 min WSW 16 G 21 61°F 64°F1013.8 hPa

Wind History for Port Chicago, CA
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Last
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Nevada County Air Park, CA10 mi48 minSSW 710.00 miFair68°F51°F56%1014.2 hPa
Marysville, Beale Air Force Base, CA14 mi85 minS 13 G 1910.00 miFair77°F53°F45%1011.1 hPa
Auburn Municipal Airport, CA19 mi28 minS 710.00 miFair70°F53°F57%1013.2 hPa
Marysville, Yuba County Airport, CA21 mi30 minS 1310.00 miFair76°F53°F45%1011.6 hPa
Lincoln Regional Karl Harder Field, CA22 mi48 minSSE 11 G 1610.00 miFair73°F50°F44%1011.5 hPa

Wind History from GOO (wind in knots)
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Last 24hrCalmSE3S3CalmS4CalmE4E4CalmCalmSE3E5CalmCalmCalmCalmCalmCalmS5S3S5S6SE6S4
1 day agoW4CalmS3S3SE4SE4SE4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3SW5SW5W5SW6W7N4
2 days agoS3SW3CalmCalmCalmCalmCalmN4N4CalmN4NW4CalmCalmNW4CalmCalmCalmW4W4W6CalmW6NW7

Tide / Current Tables for Sacramento, Sacramento River, California
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Sacramento
Click for MapNote: These data apply only during low river stages.

Wed -- 02:47 AM PDT     Moonset
Wed -- 03:25 AM PDT     2.64 feet High Tide
Wed -- 05:48 AM PDT     Sunrise
Wed -- 10:48 AM PDT     0.42 feet Low Tide
Wed -- 02:30 PM PDT     Moonrise
Wed -- 02:58 PM PDT     2.22 feet High Tide
Wed -- 08:18 PM PDT     Sunset
Wed -- 11:07 PM PDT     -0.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.61.42.12.62.62.421.51.10.70.50.40.81.522.22.11.91.510.70.30.1-0.1

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Wed -- 02:47 AM PDT     Moonset
Wed -- 03:25 AM PDT     2.63 feet High Tide
Wed -- 05:48 AM PDT     Sunrise
Wed -- 10:48 AM PDT     0.42 feet Low Tide
Wed -- 02:30 PM PDT     Moonrise
Wed -- 02:58 PM PDT     2.21 feet High Tide
Wed -- 08:18 PM PDT     Sunset
Wed -- 11:07 PM PDT     -0.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.61.42.12.62.62.31.91.51.10.70.50.40.81.522.22.11.91.510.60.30.1-0.1

Weather Map and Satellite Images
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wmap_P
GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Sacramento, CA (20,4,5,8)
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Ground Weather Radar Station Beal AFB, CA
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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 numerious 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.