Thursday, May23, 2019 L-36.com


Marine Weather and Tides
Penn Valley, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 5:45AMSunset 8:20PM Thursday May 23, 2019 9:49 AM PDT (16:49 UTC) Moonrise 11:48PMMoonset 8:54AM Illumination 78% Phase: Waning Gibbous; Moon at 19 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 231051
afdsto
area forecast discussion
national weather service sacramento ca
351 am pdt Thu may 23 2019

Synopsis
Scattered light showers and isolated thunderstorms over the sierra
today and all interior norcal mountains Friday as one low pressure
system moves east and another drops in to take its place.

Scattered showers and thunderstorms most areas over the weekend
with below normal daytime temperatures. Afternoon mountain showers
continuing through mid week.

Discussion
Mainly dry this morning as norcal sits under northerly upper flow
between high pressure over the eastern pacific and a low pressure
system now centered near southern nevada. Some cloud cover
associated with the low is spilling over mainly the eastern half
of the forecast area this morning and some scattered northern
sierra showers thunderstorms are not out of the question later
today. Elsewhere, a little more Sun should bring up daytime highs
today to close to normal for this time of year. An upper low, now
over western canada, is forecast to drop into the pacific
northwest tonight and early Friday. Brief upper ridging over the
state between this low and the great basin low should bring a
short period of clearing most areas. This period of clearing will
br brief, however, with afternoon heating, divergent flow aloft
and orographics bringing afternoon showers and thunderstorms to
the mountains Friday afternoon with some threat of showers to the
northern sacramento valley as well. The low over the pacific
northwest now looks to be an inside slider type dropping into the
great basin on Saturday. Therefore, the greatest risk of any
shower activity will be over the eastern CWA with enough
instability for thunderstorms over the sierra cascade range.

Another cold upper low is now forecast to drop out of the pacific
northwest on Sunday but this system should take a more westerly
track. As a result, scattered showers will be a possibility over
the entire CWA and north state with a threat of thunderstorms over
the sierra cascades. Daytime highs will be taking a drop Saturday
and Sunday as these two cold systems drop through the north state
especially on Sunday when daytime highs are expected to come in
from 10 to 15 degrees below normal. For the most part, snow levels
should be above pass levels so mountain travel impacts should be
minimal this weekend although snow levels may drop to pass levels
at times causing periods of slick roads. Sunday's cold upper low
is forecast to move east of the state Sunday night but will likely
continue to have impacts on the CWA weather going in to the early
part of next week.

.Extended discussion (Monday through Thursday)
models have come into better agreement with progression of upper
low into the desert SW Monday, but then diverge significantly
beyond this time. Although ensemble spread increases during the
latter part of the extended, general consensus is that long wave
troughing remains along 120w. Under broad scale weak synoptic
lift, best chances for showers will be terrain induced forcing
over the mountains in the afternoons. Below normal temperatures
progged into Monday with high temps returning to near normal
Tuesday, then above normal Wednesday and Thursday.

Aviation
Lcl MVFR ifr conds poss mnly ovr fthls and mtns this aftn into eve
for shwrs and isold tstms, otrwVFR conds ovr intr norcal nxt 24
hrs. Nly flow alf with areas of nly sfc wnd gsts to 25 kts in
cntrl vly, mnly N of kove, and adjcnt fthls mtns til abt 02z thu.

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 mi64 min W 7 64°F 1008 hPa55°F
PCOC1 - 9415144 - Port Chicago, CA 91 mi49 min SSW 5.1 G 8 64°F 62°F1008.5 hPa (+1.0)

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Nevada County Air Park, CA10 mi69 minSE 310.00 miOvercast50°F46°F88%1008.8 hPa
Marysville, Beale Air Force Base, CA14 mi1.9 hrsSSE 1110.00 miFair63°F51°F67%1007.3 hPa
Auburn Municipal Airport, CA19 mi54 minSSE 510.00 miFair59°F50°F72%1008.8 hPa
Marysville, Yuba County Airport, CA21 mi56 minSSE 810.00 miFair65°F52°F63%1008.3 hPa
Lincoln Regional Karl Harder Field, CA22 mi54 minSE 810.00 miFair64°F50°F60%1007.8 hPa

Wind History from GOO (wind in knots)
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N4N3NE7E4NE3NE4CalmN4N4N4NE4E7E3CalmSE6S6
1 day agoS4S5S3SW7S5S6SE6E4NE11
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E9SE5NW3E4SE3CalmCalmCalmCalmN4N3N7N7N4N4
2 days agoCalmW6SW3W4SW4SW7SW3S4SW5S4S4S3S4S7S8
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Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Thu -- 12:04 AM PDT     Moonrise
Thu -- 05:48 AM PDT     Sunrise
Thu -- 06:08 AM PDT     0.88 feet Low Tide
Thu -- 09:48 AM PDT     2.77 feet High Tide
Thu -- 09:57 AM PDT     Moonset
Thu -- 07:24 PM PDT     -0.13 feet Low Tide
Thu -- 08:17 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.42.21.91.61.210.91.11.82.62.82.72.421.510.60.30-0.1-0.10.41.11.7

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Thu -- 12:04 AM PDT     Moonrise
Thu -- 04:38 AM PDT     0.88 feet Low Tide
Thu -- 05:48 AM PDT     Sunrise
Thu -- 08:39 AM PDT     2.77 feet High Tide
Thu -- 09:57 AM PDT     Moonset
Thu -- 05:54 PM PDT     -0.13 feet Low Tide
Thu -- 08:17 PM PDT     Sunset
Thu -- 11:40 PM PDT     2.35 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.21.81.41.10.90.91.32.12.72.82.62.31.91.40.90.50.2-0.1-0.10.10.61.31.92.3

Weather Map and Satellite Images
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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 (12,3,4,5)
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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.