Thursday, January21, 2021
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Marine Weather and Tides
Lodoga, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:23AMSunset 5:20PM Thursday January 21, 2021 1:34 PM PST (21:34 UTC) Moonrise 12:07PMMoonset 1:04AM Illumination 61% Phase: Waxing Gibbous; Moon at 8 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 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 844 Am Pst Thu Jan 21 2021
.small craft advisory in effect from late tonight through Friday afternoon...
Today..NE winds around 5 kt, becoming S this afternoon. Wind waves 1 ft. W swell 4 to 6 ft at 15 seconds. Patchy dense fog this morning.
Tonight..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 4 to 6 ft at 14 seconds. A chance of showers.
Fri..NW winds 15 to 20 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 7 to 9 ft at 13 seconds. A chance of showers.
Fri night..N winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 9 to 11 ft at 14 seconds.
Sat..N winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 8 to 10 ft at 14 seconds.
Sat night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. NW swell 7 to 9 ft at 14 seconds.
Sun..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. NW swell 7 to 9 ft. A chance of showers.
Mon..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 7 to 9 ft.
PZZ500 844 Am Pst Thu Jan 21 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will increase later today and tonight as a cold front arrives from the north. The front will bring a chance for scattered showers. Unsettled weather will continue into the weekend with additional showers. A moderate northwest swell prevails over the seas.


7 Day Forecast for Marine Location Near Lodoga, CA
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location: 39.18, -122.55     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 211148 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 348 AM PST Thu Jan 21 2021

SYNOPSIS. Dry weather today, then periods of rain and snow Friday and into next week, bringing potential winter weather driving hazards.

DISCUSSION. Air mass gradually recovering some moisture after the strong Nly wind event earlier in the week. Under clear skies (or cirrus clouds) and light winds, dewpoints are recovering and RHs up some 30-50 percent. With temps dropping into the 30s in the Valley, can't rule out some light frost in open areas this morning. Otherwise, an increase in mostly high cloud cover is forecast today ahead of Friday's wx system, with the closed low center currently near 48N/133W (W of VCRISL).

The low center is forecast to drop SEwd into Norcal during the day on Fri, preceded by its associated cold front. So today will be the last day of widespread max temps in the 60s in the Valley for several days as max temps return to near normal on Fri with highs in the 50s in the Valley, mostly 30s and 40s in the foothills and mtns. Min temps will cool into the 30s in the Valley, and teens and 20s in the mtns for the rest of the week.

This low pressure system is not associated with an AR so it does not have an abundance of moisture associated with it, but it will be associated with a cold pocket and steep mid level lapse rates. A few of the SREF CAPE plumes for SAC show a couple hundred J/Kg for Fri afternoon with the GFS consistently highlighting instability over portions of the Srn Sac Vly/Nrn SJV since Mon/Tue, so can't rule out an isolated thunderstorm or two, or some graupel showers in the Mother Lode. This is also hinted in the NAM 3km REF prog.

Heaviest precip amounts are forecast over the orographically favored Sierra with liquid amounts up to around a third of an inch or so, and 2-4 inches of snow, and max amounts up to 5-7 inches in Srn zone 69. A dusting of snow is possible down to the upper foothills, around 3000 feet in heavier showers. The Valley should see a few hundredths N to a tenth or two tenths of an inch over the east side of the Valley.

Saturday should see some clearing and modestly warming temperatures as the trof departs. A few light snow showers could linger over the Sierra Crest south of I-80 as secondary energy drops Swd along the W coast reforming the closed low circulation to our south. This could cause backwash clouds/showers to linger into Sat. Otherwise, clearing behind the initial system could allow some patchy frost in the Valley.

Another trof and cold front are forecast to bring a reinforcing shot of cooler and showery weather to Norcal Sun/Sun nite, and lingering over the Sierra into Mon.

EXTENDED DISCUSSION (Monday THROUGH Thursday).

Long wave trough sets up along the West Coast allowing short waves to drop into it resulting in unsettled weather through the extended forecast period. Below normal temperatures expected with snow levels in the foothills and possibly upper elevations of the Northern Sacramento Valley Monday and Tuesday. Overall QPF looks light during this period. A much wetter Pacific storm is forecast midweek with snow levels rising into the upper foothills late Wednesday into Thursday.

AVIATION.

VFR conds ovr intr NorCal nxt 24 hrs with sfc wnd genly blo 12 kts.

STO WATCHES/WARNINGS/ADVISORIES. None.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANVC1 - 9416841 - Arena Cove, CA 64 mi77 min E 2.9 G 6 48°F 51°F1017.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 73 mi110 min SSE 1.9 59°F 1019 hPa34°F

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA35 mi39 minN 010.00 miFair56°F31°F39%1016.1 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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Last 24hrCalmW4W4W4CalmCalmS3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoNW9NE10
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E6W8NW4CalmNW3CalmCalmCalmN3CalmSE3CalmCalmCalmCalmCalmCalmN3CalmCalmCalmCalm
2 days agoN7W63CalmW3N3N4NW105NE13
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N6354NW10W7NW53--CalmW3N8N10

Tide / Current Tables for Fort Ross, California
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Fort Ross
Click for Map
Thu -- 01:06 AM PST     Moonset
Thu -- 04:45 AM PST     5.23 feet High Tide
Thu -- 07:26 AM PST     Sunrise
Thu -- 12:10 PM PST     Moonrise
Thu -- 12:12 PM PST     1.37 feet Low Tide
Thu -- 05:23 PM PST     Sunset
Thu -- 06:22 PM PST     3.46 feet High Tide
Thu -- 11:14 PM PST     2.49 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.53.23.94.65.15.254.43.62.82.11.61.41.51.82.32.83.23.43.43.22.92.62.5

Tide / Current Tables for Salt Point, California Current
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Salt Point
Click for Map
Thu -- 12:09 AM PST     0.00 knots Slack
Thu -- 01:06 AM PST     Moonset
Thu -- 03:07 AM PST     0.63 knots Max Flood
Thu -- 06:10 AM PST     -0.00 knots Slack
Thu -- 07:26 AM PST     Sunrise
Thu -- 09:08 AM PST     -0.89 knots Max Ebb
Thu -- 12:10 PM PST     Moonrise
Thu -- 01:26 PM PST     0.00 knots Slack
Thu -- 04:23 PM PST     0.61 knots Max Flood
Thu -- 05:23 PM PST     Sunset
Thu -- 07:16 PM PST     -0.00 knots Slack
Thu -- 09:28 PM PST     -0.48 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-00.30.50.60.60.40.1-0.4-0.7-0.9-0.8-0.7-0.5-0.20.20.50.60.60.40.1-0.3-0.5-0.5-0.4

Weather Map
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wmap_P
GEOS 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
Ground Weather Radar Station




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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 numerous 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.