Thursday, September20, 2018 L-36.com


Marine Weather and Tides
Thermalito, CA

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:51AMSunset 7:06PM Thursday September 20, 2018 12:02 AM PDT (07:02 UTC) Moonrise 4:08PMMoonset 1:31AM Illumination 78% Phase: Waxing Gibbous; Moon at 10 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 192211
afdsto
area forecast discussion
national weather service sacramento ca
311 pm pdt Wed sep 19 2018

Synopsis
Warmer weather continues into next week. Critical fire weather
concerns tonight and Thursday. Patchy smoke and haze will persist,
mainly locally over northern portions of shasta county.

Discussion
It is a warm, sunny day across interior norcal. Temperatures this
afternoon are warmer than this time yesterday, especially in the
valley where temperatures are ranging from 5 to 10 degrees warmer.

Afternoon highs will peak in the upper 80s to low 90s in the
valley and 60s to 70s in the mountains.

A weak trough moved over the area this morning and will slowly
move east across the great basin through Thursday. Northerly winds
have returned to the forecast area as we remain on the western
side of the trough. Winds are forecast to increase overnight
through Thursday, with gusts of up to 20-30 mph possible Thursday
afternoon over the northern portion of the forecast area.

Ridging will continue to build over california through the rest of
the week. Temperatures continue to increase with most locations
hitting about 4 to 8 degrees above normal Thursday and Friday.

Widespread valley temperatures in the 90s are forecast through
Friday.

The combination of northerly winds and warmer temperatures have
caused relative humidities to drop significantly today in portions
of the northern valley and coastal range. Rh values are expected
to remain low tomorrow with poor overnight recoveries. As such,
the dry conditions and gusty winds will produce critical fire
weather conditions, and the fire weather watch has been upgraded
to a red flag warning through Thursday evening. Hec
.Extended discussion (Sunday through Wednesday)
upper trof exits the pac NW and moves over the NRN rockys on sun.

Nwly flow in its wake will bring seasonably warm temps to our CWA to
end the weekend. But this is only the beginning of a warm period as
the aforementioned trof in part, begins to dig out a broad trof over
the mid section of the usa and a rex block pattern develops over the
ern pac for the remainder of the efp. With the models converging to
a similar solution of high pressure building along the W coast
during this period, some warm temps are expected in our cwa.

The wr modtrend tool continues to show higher 5h heights along the w
coast over the last several runs, and thus we have continued to
trend the efp warmer with a reasonable amount of confidence. Short
term nwp indicates MAX temps in the mid 90s over the N end of the
sac vly with 850 mbs temps in the low to mid 20s deg c. With the
medium range models forecasting slightly warmer 850 mbs temps in the
efp (mid to upper 20s deg c) we have pushed the MAX temps even
warmer there and elsewhere in our cwa, eventually to some 5-10
degrees above normal over much of our CWA Tue wed. In the middle of
summer, these 850 mbs temps would support temps in the low to mid
100s, but have tempered the warming due to the waning Sun angle as
the autumnal equinox begins this Sat at 654 pm pdt.

There will be the possibility of some moderate to locally breezy
nly winds at times Sun mon, but nothing anonymously strong. As
high pressure settles over the region Tue wed, the nly flow will
weaken. Jhm

Aviation
Dry stable air mass over interior norcal through Thu withVFR skc
conditions except for local MVFR ifr vsbys due to smoke near the
delta wild fire in shasta co. Nly flow gradually increasing
tonight as high pressure builds over or. Nly winds expected to
gust to 25-30 kts over krdd krbl TAF sites after 20 1600 utc.

Band of 25-30 kts 925 mbs winds (roughly 2 kft msl) forecast to
increase after 20 03 utc to 20 18 utc mainly on W side of sac vly
and into lake napa counties N bay mtns causing light to moderate
turbulence for light aircraft. Nly flow will negate marine layer
and its influence inland.

Sto watches warnings advisories
Red flag warning from 7 pm this evening to 7 pm pdt Thursday for
central sacramento valley in glenn, colusa, yuba, northern
sutter, and butte county below 1000 ft-eastern mendocino nf-
eastern portion of shasta trinity nf-lake county portion of lake-
napa-sonoma unit-northern sacramento valley to southern tehama
county line below 1000 ft-northern sierra foothills from 1000 to
3000 ft. Includes portions of shasta-trinity and butte units-
southeast edge shasta-trinity nf and western portions of tehama-
glenn unit-southern sacramento valley in yolo-sacramento far
western placer, southern sutter and solano county below 1000 ft.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 97 mi77 min S 2.9 63°F 1009 hPa48°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oroville Municipal Airport, CA5 mi69 minE 310.00 miFair68°F37°F32%1010.3 hPa
Chico Municipal Airport, CA21 mi67 minSE 310.00 miFair66°F23°F19%1010.2 hPa

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Last 24hrE8E6SE4CalmNW3CalmCalmCalmW33W6W55Calm3W55W4SW3CalmNE5NE4E3N4
1 day agoSE4SE6CalmS6SW3CalmNE3CalmCalm343SW36W4W3S43CalmCalmE3CalmE5E5
2 days agoE4E4E3CalmW3NW3CalmCalmCalmCalmW3NW4SW3S43CalmSW6SW7S5SE6E4SE3S7SE6

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Sacramento, Sacramento River, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Sacramento, CA (3,6,7,8)
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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.