Monday, February19, 2018 L-36.com


Marine Weather and Tides
Clarksburg, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:48AMSunset 5:50PM Monday February 19, 2018 11:31 AM PST (19:31 UTC) Moonrise 9:07AMMoonset 9:49PM Illumination 20% Phase: Waxing Crescent; Moon at 4 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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PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 839 Am Pst Mon Feb 19 2018
.small craft advisory in effect through late tonight...
Today..NW winds 15 to 25 kt.
Tonight..NW winds 15 to 25 kt...decreasing to 5 to 15 kt after midnight.
Tue..W winds 5 to 15 kt.
Tue night..NW winds 5 to 15 kt.
Wed..NE winds 5 to 15 kt...becoming w.
Thu..W winds 10 kt...becoming nw 10 to 20 kt.
Fri..W winds 10 kt.
PZZ500 839 Am Pst Mon Feb 19 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong northwest winds will usher in arctic air today and generate fresh swell and steep wind waves. Showers will continue through the day. Another trough will swiftly move southward over the coastal waters late Wednesday night with a slight chance of showers.

7 Day Forecast for Marine Location Near Clarksburg, CA
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location: 38.42, -121.52     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 191203
afdsto
area forecast discussion
national weather service sacramento ca
403 am pst Mon feb 19 2018

Synopsis
A cold weather system will bring scattered snow showers across
the northern sierra today. Near record cold temperatures with a
possible widespread freeze early this week. Unsettled pattern
continues through the week.

Discussion
Latest radar and satellite imagery indicates the next wave of
energy coming down on the backside of an upper level trough. High
resolution guidance indicates another round of showers over the
i-80 highway 50 corridor mainly through 6 am. Another inch or two
is possible over the higher elevations. After a brief break
during the day, the remaining upper energy is forecast to dive
southward Monday afternoon with another round of showers mainly
near the sierra crest. Forecast soundings indicate some afternoon
instability, which could result in some thundersnow. A quick 2 to
3 inches of snow is possible near the sierra crest Monday
afternoon with this activity.

Meanwhile, the coldest air of the winter season has begun to
impact the forecast area early this morning. Most valley locations
are near or below freezing under clear skies, a cold airmass and
light winds. This cold pattern is well supported by the naefs
ensembles as they indicate strong temperature anomalies at both
850mb and 1000mb. Therefore, widespread freeze conditions could
continue into Tuesday night with the potential for widespread
frost. The coldest temperatures are expected through Tuesday
morning. Wednesday morning lows are anticipated to be slightly
warmer as an upper wave could bring increased cloud cover.

Embedded disturbances in the upper flow will push across the area
this week, with a few inches of accumulation possible at pass
levels through early Friday. Snow levels will be around 1000-2000
feet or lower.

.Extended discussion (Friday through Monday)
another northerly shortwave trough is expected to move through the
region Thursday into Friday. Both the GFS and ECMWF are struggling
to grasp the details on this system, thus forecast confidence is
low on how widespread precipitation will be, and how much
moisture this system will have. Snow levels are expected to remain
quite low in this cold regime however, and light snow could again be
possible in the foothills.

A weak ridge will move through the region Friday into Saturday,
bringing drier weather along with another round of potentially
sub-freezing valley temperatures overnight. Another series of
storm systems will then approach the region early next week. Gfs
and ECMWF have not gotten a good handle on this pattern change, as
the GFS shows a rather wet scenario developing, and the ecmwf
flip- flopping between wet and dry solutions. For now, our
forecast is a blend of these very different solutions.

Dang

Aviation
Vfr conditions across valley TAF sites the next 24 hours.

Scattered snow showers with ifr lifr conditions will continue over
the mountains. Light overnight winds will increase to NW 5-15 kt
with local gusts to 25 kt during the day, then weaken again
tonight.

Dang

Sto watches warnings advisories
Freeze warning until 8 am pst Wednesday for carquinez strait and
delta-central sacramento valley-clear lake southern lake county-
motherlode-northeast foothills sacramento valley-northern
sacramento valley-northern san joaquin valley-shasta lake area
northern shasta county-southern sacramento valley.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 31 mi107 min NE 2.9 46°F 1017 hPa28°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi44 min WNW 6 G 7 46°F 1017.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 37 mi44 min Calm G 6 46°F 53°F1017.3 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 42 mi44 min W 9.9 G 12 44°F 53°F1017.4 hPa29°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 47 mi44 min WNW 5.1 G 9.9 46°F 1017.4 hPa
RCMC1 - 9414863 - Richmond, CA 58 mi50 min NNW 12 G 14 45°F 54°F1017.2 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sacramento Executive Airport, CA7 mi39 minNNW 11 G 1710.00 miFair48°F28°F46%1016.9 hPa
Sacramento Mather Airport, CA15 mi42 minN 010.00 miClear46°F28°F50%1016.6 hPa
University Airport, CA16 mi52 minN 910.00 miFair46°F23°F40%1017.3 hPa
Sacramento, McClellan Airfield Airport, CA18 mi37 minNNW 910.00 miFair46°F26°F46%1017.3 hPa
Sacramento International Airport, CA20 mi39 minN 1010.00 miFair47°F26°F44%1016.8 hPa
Vacaville Nut Tree Airport, CA23 mi39 minN 8 G 1610.00 miFair51°F24°F35%1017.3 hPa
Fairfield / Travis Air Force Base, CA24 mi94 minNW 510.00 miFair46°F28°F49%1016.9 hPa

Wind History from SAC (wind in knots)
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Last 24hrSW12
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W12NW4W10NW3W4CalmSE4S3CalmCalmCalmCalmCalmCalmNW5N11
G17
1 day ago44455S3S5S3SE5S4SE5SE4SE4S5S4S7S10S8SW9
G16
S5SW7SW10SW7SW9
2 days agoCalmCalmCalmNW6N7NW6N3CalmCalmCalmCalmCalmSE3CalmE3CalmCalmW4CalmCalmN3SE43S3

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

Mon -- 02:59 AM PST     0.13 feet Low Tide
Mon -- 06:51 AM PST     Sunrise
Mon -- 08:07 AM PST     2.81 feet High Tide
Mon -- 09:07 AM PST     Moonrise
Mon -- 03:33 PM PST     0.48 feet Low Tide
Mon -- 05:48 PM PST     Sunset
Mon -- 08:06 PM PST     2.65 feet High Tide
Mon -- 09:49 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.50.20.10.311.92.52.82.72.521.510.70.50.50.91.72.42.62.62.31.9

Tide / Current Tables for Snodgrass Slough, Sacramento River, California
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Snodgrass Slough
Click for Map
Mon -- 03:33 AM PST     0.12 feet Low Tide
Mon -- 06:51 AM PST     Sunrise
Mon -- 09:06 AM PST     Moonrise
Mon -- 09:09 AM PST     2.29 feet High Tide
Mon -- 04:07 PM PST     0.45 feet Low Tide
Mon -- 05:48 PM PST     Sunset
Mon -- 09:08 PM PST     2.16 feet High Tide
Mon -- 09:49 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.70.30.20.20.411.62.12.32.221.61.20.80.60.50.60.91.522.22.11.9

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Sacramento, CA (14,3,4,5)
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Ground Weather Radar Station Sacramento, 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.