Wednesday, January22, 2020
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Marine Weather and Tides
Calpella, CA

Version 3.4
NOTICE
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 7:25AMSunset 5:23PM Wednesday January 22, 2020 3:54 PM PST (23:54 UTC) Moonrise 5:51AMMoonset 3:27PM Illumination 5% Phase: Waning Crescent; Moon at 27 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- 249 Pm Pst Wed Jan 22 2020
Tonight..NW winds up to 10 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft at 13 seconds.
Thu..W winds around 5 kt. Wind waves 1 to 2 ft. W swell 5 to 6 ft at 12 seconds.
Thu night..NW winds up to 10 kt. Wind waves 1 to 2 ft. W swell 5 to 7 ft at 13 seconds and W 2 to 3 ft at 22 seconds. A slight chance of rain.
Fri..S winds up to 10 kt. Wind waves 1 to 2 ft. W swell 6 to 8 ft at 12 seconds and W 4 to 5 ft at 20 seconds. A slight chance of rain.
Fri night..SE winds up to 10 kt. Wind waves 2 to 3 ft. W swell 9 to 11 ft at 17 seconds and nw 2 to 4 ft at 19 seconds. A chance of rain.
Sat..S winds 5 to 15 kt. Wind waves 2 to 3 ft. W swell 8 to 10 ft. Rain.
Sun..W winds up to 10 kt. Wind waves 1 to 2 ft. W swell 9 to 11 ft. A chance of rain.
PZZ500 249 Pm Pst Wed Jan 22 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Seas will gradually decrease overnight into Thursday with light winds over the waters. Generally light winds will persist Friday and Saturday with high pressure over the region. However a long period swell will pass through waters Friday and Saturday with potentially dangerous surf conditions. The next storm approaches later Saturday into Sunday with increasing southery winds followed by another large northwest swell behind the front Sunday into Monday.


7 Day Forecast for Marine Location Near Calpella, CA
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location: 39.21, -123.35     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 222336 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 336 PM PST Wed Jan 22 2020

SYNOPSIS. Occasional light showers are expected today through Friday, mainly north of Cape Mendocino. Widespread rain, possibly heavy, is expected this weekend. Wet weather is expected to continue into next week.

DISCUSSION. A few light showers north of Cape Mendocino and breezy south winds are continuing across the area this afternoon. Mainly dry conditions are expected tonight, although a few showers are possible in northern Del Norte county and over the higher terrain of Humboldt and Del Norte counties. Thursday this is expected to continue, although some precip may make it into the higher elevations of Trinity county. The airmass continues to warm and this will increase surface temperatures and raise snow levels. Highs along the coast are expected to reach 60 and snow levels are expected to rise over 8,000 feet.

Late Thursday night into early Friday morning a fairly quick moving and weak cold front brings some rain to the area. The models are showing a bit more rainfall with this system than yesterday. Current models are in decent agreement on Del Norte county getting over an inch in the mountains and close to an inch at the coast. Farther south and east rainfall amounts drop off quickly. The humboldt Bay area is only expected to see rainfall amounts of a quarter of an inch with only a trace to a few hundredths expected in Ukiah. Snow levels with this system are expected to be over 7,000 feet dropping to 5,000 feet or so behind the front, but most of the precip is expected to be over by then.

Once any lingering showers have ended in the morning, Friday is generally expected to be warm and mainly dry. This break should allow rivers and small streams to come down before the next rain. Late Friday night the GFS ensemble mean is showing IVT values of 350 to 450 KG/M/S for around 24 hours near the Oregon Border. This starts Friday night and runs through Saturday night. These values indicate there is the potential for heavy rain through this period and the ensemble mean peaks near 500 late Saturday and Saturday night.

Bottom line is that we have a very warm and moist airmass with a lot of water vapor being transported late Friday night through Saturday night. The models sometimes struggle to capture these heavy rain rates so the QPF may be underdone. This will likely produce some small stream flooding and flooding of low lying areas. Street flooding is possible as well. The most likely areas to see this will be in Humboldt and Del Norte counties. At this point river flooding is not expected as the rivers will be starting the event at fairly low levels. This will need to be monitored as it gets closer and if we get more rain than expected on Friday some minor flooding is possible on the smith river. Farther south and east less rain is expected and impacts will be less. Behind the front on Sunday snow levels are expected to drop to around 4,500 to 5,000 feet and there will be some showers around.

Monday through Wednesday next week additional systems are expected and they may bring more periods of heavy rain. These systems also look warm and moist, however they continue to move through fairly quickly. At this point it looks like there will be some breaks in the rain, but depending on the length of these there is the potential for some flooding on the Smith River. MKK

AVIATION. Gusty south-southeast winds will occur across the Del Norte coast through tonight, impacting KCEC. Winds will then weaken somewhat during Thursday morning and afternoon before restrengthening out of the south during Thursday evening. Elsewhere, generally light and variable winds are expected across interior portions of NWRN CA. Otherwise, ceilings across the region will lift somewhat tonight accompanied by a short-period of low rain chances. Rain and lowering ceilings are forecast to return Thursday afternoon.

JMG

MARINE. Steep hazardous seas will occur across the northern outer waters through Thursday due to persistent south winds gusting to 25-30 kt. Elsewhere, seas are forecast to subside tonight and then rebuild Friday as a long period westerly swell spreads east through the waters. The longer term marine outlook indicates multiple episodes of gusty southerly and westerly winds this weekend through the middle of next week. Thus, additional small-craft advisories possibly upgraded to periods of gales are expected during the next seven days.

JMG

EKA WATCHES/WARNINGS/ADVISORIES. CA . None.

NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory until 4 PM PST this afternoon for PZZ450-455-475.

Small Craft Advisory until 1 AM PST Friday for PZZ470.



Visit us at https://www.weather.gov/eureka

Follow us on Facebook and Twitter at: https://www.facebook.com/NWSEureka https://www.twitter.com/NWSEureka

For forecast zone information see the forecast zone map online: https://www.weather.gov/images/eka/zonemap.png


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANVC1 - 9416841 - Arena Cove, CA 28 mi61 min 53°F 53°F1024.1 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 33 mi25 min SSE 3.9 G 7.8 53°F 53°F1024 hPa53°F

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA9 mi2 hrsW 310.00 miFair56°F45°F67%1023.6 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW3Calm
1 day agoSE8CalmS3CalmS8SE5S6SE8S6S9S7S76SE6S8S9S9S8S11
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2 days agoCalmCalmCalmCalmN4CalmCalmCalmCalmCalmSW3CalmE4CalmCalmS3N3E3NW3CalmCalmSE4SE7S7

Tide / Current Tables for Albion, California
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Albion
Click for Map
Wed -- 02:41 AM PST     2.90 feet Low Tide
Wed -- 05:52 AM PST     Moonrise
Wed -- 07:29 AM PST     Sunrise
Wed -- 08:40 AM PST     6.47 feet High Tide
Wed -- 03:28 PM PST     Moonset
Wed -- 03:50 PM PST     -0.79 feet Low Tide
Wed -- 05:23 PM PST     Sunset
Wed -- 10:54 PM PST     4.86 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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43.432.93.344.95.76.36.45.94.83.21.60.2-0.6-0.8-0.40.41.42.73.84.64.9

Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
Click for Map
Wed -- 02:39 AM PST     2.90 feet Low Tide
Wed -- 05:52 AM PST     Moonrise
Wed -- 07:30 AM PST     Sunrise
Wed -- 08:33 AM PST     6.47 feet High Tide
Wed -- 03:28 PM PST     Moonset
Wed -- 03:48 PM PST     -0.79 feet Low Tide
Wed -- 05:23 PM PST     Sunset
Wed -- 10:47 PM PST     4.86 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.93.432.93.344.95.86.46.45.84.73.11.50.2-0.6-0.8-0.40.41.52.83.94.74.8

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
Wind Forecast for Eureka, CA (18,4,5,8)
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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 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.