Sunday, January21, 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 7:16AMSunset 5:17PM Sunday January 21, 2018 4:57 AM PST (12:57 UTC) Moonrise 10:02AMMoonset 9:53PM Illumination 23% Phase: Waxing Crescent; Moon at 5 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- 212 Am Pst Sun Jan 21 2018
.small craft advisory in effect from this afternoon through Monday morning...
Today..SW winds 5 to 15 kt...becoming 15 to 25 kt late this afternoon. Chance of rain in the afternoon.
Tonight..S winds 15 to 25 kt. Chance of rain in the evening, then rain likely after midnight.
Mon..SE winds 15 to 25 kt...decreasing to 5 to 15 kt by noon. Slight chance of rain in the morning.
Mon night..NE winds 5 to 15 kt.
Tue..NE winds 10 kt.
Wed..SE winds 10 to 20 kt...becoming W 5 to 15 kt. Rain likely.
Thu..W winds 5 to 15 kt. Chance of showers.
PZZ500 212 Am Pst Sun Jan 21 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will increase and become southwesterly later this morning, especially for the northern coastal waters, ahead of an arriving weak cold front. The cold front is forecast to pass through Monday morning and will switch winds out of the north again. Small craft advisories are in place for most coastal water zones mainly due to squared and hazardous seas over the next couple of days. A new northwest swell train arrives by this evening.

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 211152
afdsto
area forecast discussion
national weather service sacramento ca
352 am pst Sun jan 21 2018

Synopsis
Pacific storm moves through Sunday into Monday followed by
another midweek into Friday bringing periods of rain, mountain
snow, and gusty wind.

Discussion
Main forecast concerns for the short term period include a series
of winter storms that will bring rain and mountain snow to
northern california.

Water vapor and model upper level analysis from the early morning
show upper level trough off the west coast of canad a with
shortwave ridge of high pressure extending into the inner mountain
west of the conus. Moisture streaming in between the two upper
features increased high level cloud cover early this morning,
including the next storm system arrival.

Latest short term model guidance varies in precipitation amounts
with the incoming storm system, however the main storm track is
consistent with the brunt of the system passing to the north of
the forecast area under westerly flow at the upper levels. Model
height falls are subtle between 850 and 500 mb with the main
vorticity spin remaining north of the forecast area. Latest model
guidance has trended downward in precipitation amounts for the
mountains, however still expecting up to 3 inches for the i-5
corridor and up to 9 inches for the higher northern mountains of
shasta county. Snow levels will fall to 2000 feet, but the main
snow accumulations will happen at greater than 3000 feet.

Elsewhere, the valley can expect between 0.25 and 0.75 inches of
rain. The sierra is expecting light snow accumulations above 3000
feet north of i-80, but donner pass is not expecting heavier
amounts of snow due to the northerly trajectory of the upper
disturbance.

Another brief break is expected on Tuesday with a transition to a
shortwave ridge before the next weather system approaches
northern california. Early projections indicate heavier snow
between one and two feet for the sierra for Wednesday into
Thursday with widespread chances for rainfall across the valley up
to an inch.

.Extended discussion (Thursday through Sunday)
models shift pacific frontal band south and east of the CWA after
12z Thursday with upper trough shifting through the pacific
northwest and northern california during the day on Thursday.

Shortwaves pivoting through the trough will bring periods of
showers through the day Thursday. Cold air filtering in behind the
front will bring down snow levels down to some of the lowest
elevations of the season. Snow levels over shasta county will drop
to around 2000 feet with snow levels around 3000 feet over the
northern sierra nevada. Showers will continue over the cwa
Thursday night before lifting northward on Friday as high pressure
amplifies over the west coast. Daytime temperatures will come in
below normal on Thursday warming to near normal on Friday as areas
south of the northern mountains begin to clear. The shower threat
continues to shift northward on Saturday with daytime
temperatures warming to a little above normal. Upper ridge
amplifies still further by next Sunday bringing dry conditions,
clearing skies and above normal temperatures.

Aviation
MainlyVFR conditions this morning except areas MVFR in light fog
southern sacramento and northern san joaquin valleys and delta
through about 18z. Frontal band will bring rain over the northern
sacramento after about 20z with MVFR ceilings after about 02z.

MVFR conditions shifting southward to ksac by 05z. South wind
gusts 15 to 20 knots after about 18z.

Sto watches warnings advisories
Winter weather advisory from 2 pm this afternoon to 4 pm pst
Monday for mountains southwestern shasta county to northern lake
county-shasta lake area northern shasta county-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 31 mi73 min WNW 1 37°F 1025 hPa37°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi52 min S 4.1 G 5.1 44°F 1025.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 37 mi40 min S 8 G 11 40°F 51°F1025.6 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 42 mi40 min SSE 1.9 G 2.9 42°F 52°F1025.9 hPa42°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 47 mi40 min SSE 2.9 G 4.1 44°F 1025.5 hPa
RCMC1 - 9414863 - Richmond, CA 58 mi46 min SSE 5.1 G 7 49°F 53°F1025.4 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sacramento Executive Airport, CA7 mi65 minSSE 410.00 miFair37°F35°F93%1025.7 hPa
Sacramento, McClellan Airfield Airport, CA18 mi68 minSE 410.00 miFair36°F32°F87%1026.4 hPa
Sacramento International Airport, CA20 mi65 minN 010.00 miFair34°F33°F97%1025.6 hPa
Vacaville Nut Tree Airport, CA23 mi65 minN 010.00 miFair33°F32°F96%1026.1 hPa
Fairfield / Travis Air Force Base, CA24 mi2 hrsSSW 510.00 miFair37°F36°F98%1025.4 hPa

Wind History from SAC (wind in knots)
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Last 24hrNW6NW6NW8NW7N8NW10NW6NW8NW10NW11NW14NW10NW6CalmW3SW4CalmCalmCalmCalmE3CalmSE3SE4
1 day agoS4S4SW4CalmS33S3--W8W4NW7W7NW4N5NW4NW4W6NW5NW7NW6NW7NW6NW7NW4
2 days agoS7S4SE8SE6SE7S5SE7SE8SE7SE95S5S7--S11SW7S7SW4SW7SW7SW4SW5S4Calm

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

Sun -- 03:34 AM PST     0.01 feet Low Tide
Sun -- 07:19 AM PST     Sunrise
Sun -- 09:08 AM PST     2.57 feet High Tide
Sun -- 10:01 AM PST     Moonrise
Sun -- 03:55 PM PST     0.69 feet Low Tide
Sun -- 05:16 PM PST     Sunset
Sun -- 08:11 PM PST     2.68 feet High Tide
Sun -- 09:53 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.10.60.2000.41.11.82.42.62.52.21.81.410.80.70.91.62.32.72.62.42

Tide / Current Tables for Snodgrass Slough, Sacramento River, California
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Snodgrass Slough
Click for Map
Sun -- 04:08 AM PST     0.01 feet Low Tide
Sun -- 07:18 AM PST     Sunrise
Sun -- 10:01 AM PST     Moonrise
Sun -- 10:10 AM PST     2.10 feet High Tide
Sun -- 04:29 PM PST     0.66 feet Low Tide
Sun -- 05:16 PM PST     Sunset
Sun -- 09:13 PM PST     2.19 feet High Tide
Sun -- 09:52 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.30.80.40.100.10.511.622.121.81.51.10.80.70.711.41.92.22.11.9

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 (7,2,3,4)
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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.