Friday, March22, 2019 L-36.com


Marine Weather and Tides
Thermalito, 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 7:06AMSunset 7:20PM Thursday March 21, 2019 11:14 PM PDT (06:14 UTC) Moonrise 7:23PMMoonset 6:52AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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 Thermalito, CA
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location: 39.56, -121.59     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 212225
afdsto
area forecast discussion
national weather service sacramento ca
325 pm pdt Thu mar 21 2019

Synopsis
Another round of rain and snow Friday through Saturday with
enough mountain snow to impact weekend travel. Dry weather Sunday
then more rain and mountain snow early next week.

Discussion
Cloudiness over the NRN sierra associated with the upper low
vcnty of klas will erode dissipate overnite as the cyclonic flow
around the upper low weakens. A plethora of CU sc cloudiness and a
few light showers over the west slope sierra will also dissipate
after sunset as diurnal differential heating ceases as well.

Subsidence from the ERN pac ridge axis moving inland will also
bring clearing to the west slope sierra overnite, or continue the
clear conditions elsewhere. But, by Fri afternoon and evening
precip will once again spread over interior norcal as mar wx
continues to roar like the proverbial lion. A couple of the higher
resolution QPF ref progs show the leading edge of the precip
reaching the coast by 5 am fri, (with some light showers ahead of
it over shasta co) moving towards i-5 by 10 am fri, and into the
sierra by early afternoon. The timing of the wsw looks "about
right", and will continue messaging some travel impacts developing
by afternoon and into sat. Snow levels forecast to be around 5000
ft over the sierra to 4000 ft over shasta co Fri afternoon, and
4000-4500 ft sat.

By late Sat afternoon, the main frontal precip band will be near
the ca nv border and cross mountain flow from the coastal range
should bring some subsidence warming drying and eroding of the
cloud cover on the west side of the vly. Bufkit forecast soundings
suggest differential heating could lead to surface-based
convection Sat afternoon mainly from the sac area nwd towards rdd
as the upper trof axis moves over the area. The higher probability
for storms appears to be with the colder mid-tropospheric (5h)
temps over the NRN portion of the cwa, (i.E. Cic, rbl, rdd areas)
where deeper instability is forecast than at locations farther
south in our cwa.

The upper trof is forecast to move into nv Sat evening and precip
will end or wind-down overnite in our cwa. Upper-level short-wave
ridging moving in behind the trof on Sun will result in a dry day
with warmer daytime highs than on sat. Sun will be a good day to
travel, but the dry wx will be brief, as the next wx system is
forecast to spread another round of precip over interior norcal
beginning Sun night. And, the wet wx could persist through the
middle of next week. It seems as if mar wx will continue like the
"proverbial lion" over norcal until the end of the month. Jhm
.Extended discussion (Monday through Thursday)
models in good agreement with pacific frontal system moving
through interior norcal Monday bringing widespread precipitation.

Precip turns showery Tuesday, mainly over the mountains. A
stronger pacific storm follows with more widespread rain and
mountain snow beginning Tuesday night and continuing into
Thursday. Total QPF for Monday into Thursday ATTM looks to be
around 1 to 2 inches for the central valley and 1 to 4 inches for
the foothills and mountains. Mountain travel impacts due to
periods of heavy snow and strong wind are likely next week.

Aviation
Vfr conds thru abt 15z fri, bcmg wdsprd MVFR ifr sprdg fm W to e
ovr intr norcal and cont into Sat mrng. Sfc wnds genly blo 12 kts
til arnd 18z Fri then incrsg.

Sto watches warnings advisories
Winter weather advisory from 11 am Friday to 5 pm pdt Saturday
for west slope northern sierra nevada-western plumas
county lassen park.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 97 mi90 min W 7 51°F 1020 hPa45°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oroville Municipal Airport, CA5 mi22 minE 610.00 miFair52°F41°F66%1020.2 hPa
Chico Municipal Airport, CA21 mi20 minN 010.00 miFair52°F39°F62%1019.6 hPa

Wind History from OVE (wind in knots)
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Last 24hrS3E4CalmCalmCalmE5E6E3CalmE3Calm3544W4SW4SW6CalmSE7SE6E6E6E6
1 day agoE5S9S19SE13SE8E6E4E6SE6S10SE16
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2 days agoE7E7NE4N5NW4NW4CalmE3E3CalmW3SW4SE5S55S3S5CalmCalmN6N6NE9NW3SW3

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
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Fri -- 04:16 AM PDT     0.04 feet Low Tide
Fri -- 07:06 AM PDT     Sunrise
Fri -- 08:26 AM PDT     Moonset
Fri -- 08:53 AM PDT     3.03 feet High Tide
Fri -- 04:46 PM PDT     0.09 feet Low Tide
Fri -- 07:19 PM PDT     Sunset
Fri -- 09:14 PM PDT     2.91 feet High Tide
Fri -- 09:32 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.10.60.200.2122.832.92.521.40.90.40.20.10.61.62.52.92.82.5

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
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Fri -- 02:46 AM PDT     0.04 feet Low Tide
Fri -- 07:06 AM PDT     Sunrise
Fri -- 07:44 AM PDT     3.03 feet High Tide
Fri -- 08:26 AM PDT     Moonset
Fri -- 03:16 PM PDT     0.09 feet Low Tide
Fri -- 07:19 PM PDT     Sunset
Fri -- 08:05 PM PDT     2.91 feet High Tide
Fri -- 09:32 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.40.10.10.51.42.32.932.82.41.81.20.70.30.10.20.91.92.62.92.82.41.9

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 (2,6,7,8)
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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 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.