Monday, January22, 2018 L-36.com


Marine Weather and Tides
Lower Lake, 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 7:22AMSunset 5:22PM Monday January 22, 2018 2:19 AM PST (10:19 UTC) Moonrise 10:37AMMoonset 10:58PM Illumination 31% Phase: Waxing Crescent; Moon at 6 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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PZZ540 Point Arena To Point Reyes To 10 Nm- 839 Pm Pst Sun Jan 21 2018
.small craft advisory in effect through late Monday night...
Tonight..SW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 11 to 14 ft at 16 seconds and sw 3 ft at 12 seconds. Rain late in the evening, then rain likely after midnight.
Mon..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 11 to 13 ft at 15 seconds and sw 3 ft at 12 seconds. Slight chance of showers in the morning.
Mon night..N winds 10 kt...becoming southeast after midnight. Wind waves 2 ft or less. W swell 9 to 11 ft at 14 seconds.
Tue..SE winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 6 to 8 ft at 13 seconds.
Tue night..SE winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 4 to 5 ft at 12 seconds. Slight chance of rain after midnight.
Wed..SW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 5 to 7 ft...increasing to 7 to 9 ft. Rain, then rain likely.
Thu..W winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 12 to 15 ft. Chance of showers, then slight chance of showers.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 10 to 13 ft.
PZZ500 839 Pm 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... South winds will increase ahead of an approaching cold front. The cold front is forecast to pass through Monday morning and winds will switch to northwest. 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 Lower Lake, CA
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location: 38.89, -122.59     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 220635 aaa
afdsto
area forecast discussion
national weather service sacramento ca
1025 pm pst Sun jan 21 2018

Synopsis
Pacific storm brings light to moderate precipitation to norcal into
Monday. Brief period of dry weather as high pressure rebuilds over
the area later Monday and Tuesday. Stronger system impacts the area
midweek into Friday bringing moderate to heavy rain and mountain
snow, and gusty wind.

Discussion
Update: shasta dam profiler shows snow level around 2 kft with
reports of snow on i-5 north of rdd down to around 1500 ft. Farther
se, ove profiler shows the snow level around 4 kft. Radar shows
precip just beginning to move into the i-80 corridor where the
precip should be in the form of snow at blu. Also freezing melt
level around 3500-4000 ft showing up as higher reflectivities in the
nrn sac vly indicating some moderate precip moving through that
area. Typical of low snow level events, winds at rdd are (light)
northerly while up valley gradients maintain sly flow up the valley.

Short wave trof forecast to move through the pac NW early Mon and
ridging will return to the region. This will generally end the
precip, but moisture will remain trapped below the subsidence
inversion so clouds will be stubborn, persistent and slow to clear.

There should be some clearing on the west side of the valley in the
afternoon due to the nwly downslope flow off the coastal range,
while upslope flow over the sierra will likely keep skies cloudy
there.

Precip timing from the hrrr and nam3km suggest precip will be
winding down over our advisory area after 3 am or so. So we will
look at the status of the advisories overnight. Jhm

Previous discussion
Pacific frontal system continues to make a slow progression inland
this afternoon as 5h flow nearly parallels surface boundary. Run
to run of the hrrr has trended slower with front advancement.

Latest showing precip spreading over the coastal and shasta
mountains through the afternoon and across the sacramento valley
into western plumas county this evening. Bulk of precip moves
through overnight. Snow levels expected to slowly rise to 3500 to
4000 feet by Monday morning. Snow accumulations up to 5 inches
possible in the shasta and coastal mountains, with local amounts
up to 10 inches over highest terrain. Slightly less accumulations
expected in the mountains of western plumas overnight, while only
up to 3 inches forecast for the northern sierra nevada.

Showers Monday morning decrease in the afternoon as subsidence
increases over interior norcal. Upper ridging brings drier weather
Monday night into Tuesday. Some patchy morning fog may develop in
southern portions of the sacramento valley and northern san
joaquin valley Tuesday morning. Temperatures trend up early next
week to near or slightly above normal Tuesday.

Stronger pacific frontal system spreads inland over far NW ca
Tuesday night then across all of interior norcal Wednesday.

Breezy to windy conditions develop ahead of the front Wednesday.

Models currently showing significant QPF with this storm. Snow
levels ATTM initially look to be around 5000 to 6000 feet
Wednesday morning, but lower to 2500 to 3500 feet Wednesday night
into Thursday in post-frontal colder ams. Showery weather follows
Thursday.

Pch
.Extended discussion (Thursday through Sunday)
a pacific front will be tracking to our south and east to start
the extended period with the tough axis working through norcal.

This will bring showers to the area throughout Thursday. Cold air
quickly builds in behind the front and we will see low snow
levels, 2000 to 3000 feet. Mountain travel will likely be
difficult on Thursday and this includes both i-80 and i-5.

Mountain showers will continue into Friday due to onshore flow but
should diminish by Friday afternoon. A warm front pushes into the
pacnw late Friday into Saturday and that may bring a few isolated
showers to the shasta mountains Friday night. Otherwise quiet
weather settles in for the weekend as a ridge builds in overhead.

We will see a cool start to the period with highs generally
running 5-10 degrees below normal but as the ridge builds in
towards the weekend we will see them return to near normal.

-cjm

Aviation
Vfr conditions expected through 02z Monday. CIGS lower to MVFR,
1500 to 3000 feet after 02z from north to south. Light showers are
also expected through the overnight. Showers diminish between
12-15z with improving conditions into Monday afternoon but areas
of MVFR will still be possible. 5-10 knot winds are expected
throughout the period.

-cjm

Sto watches warnings advisories
Winter weather advisory until 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 56 mi94 min S 6 49°F 1026 hPa48°F
ANVC1 - 9416841 - Arena Cove, CA 59 mi49 min NW 4.1 G 8 52°F 55°F1024.9 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 59 mi39 min SSW 16 G 21 55°F 55°F1024.6 hPa55°F

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA29 mi26 minS 54.00 miLight Rain Fog/Mist54°F54°F100%1023.4 hPa

Wind History from STS (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmNE5N3CalmCalmSE3S3S6S74SE7SW3CalmS7SE6SE10SE8S9S5
1 day agoNW6W3SW3W4S3CalmCalmCalmCalmN11N9N10NW5NW10NW7NW6NW7NW3CalmCalmCalmCalmCalmCalm
2 days agoNW4CalmN4NW4NW3NW4NW4N3CalmCalmCalm33NW6CalmNW4NW5NW7NW3N7NW6NW4CalmCalm

Tide / Current Tables for Fort Ross, California
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Fort Ross
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Mon -- 02:28 AM PST     5.01 feet High Tide
Mon -- 07:25 AM PST     Sunrise
Mon -- 08:21 AM PST     2.35 feet Low Tide
Mon -- 10:39 AM PST     Moonrise
Mon -- 01:49 PM PST     4.48 feet High Tide
Mon -- 05:23 PM PST     Sunset
Mon -- 08:23 PM PST     0.80 feet Low Tide
Mon -- 11:00 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.74.5554.63.93.22.62.42.42.83.43.94.34.54.23.72.81.91.20.80.91.42.3

Tide / Current Tables for Napa, Napa River, Carquinez Strait, California
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Napa
Click for Map
Mon -- 05:35 AM PST     6.62 feet High Tide
Mon -- 07:21 AM PST     Sunrise
Mon -- 10:35 AM PST     Moonrise
Mon -- 11:43 AM PST     2.45 feet Low Tide
Mon -- 04:56 PM PST     6.07 feet High Tide
Mon -- 05:20 PM PST     Sunset
Mon -- 10:56 PM PST     Moonset
Mon -- 11:45 PM PST     0.83 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.81.83.14.55.76.56.66.15.14.13.12.62.533.94.95.86.15.85.142.81.71

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 (5,6,7,8)
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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.