Thursday, April2, 2020
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Marine Weather and Tides
Shelter Cove, 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 6:55AMSunset 7:44PM Thursday April 2, 2020 8:52 PM PDT (03:52 UTC) Moonrise 12:26PMMoonset 2:46AM Illumination 76% Phase: Waxing Gibbous; Moon at 10 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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PZZ455 Cape Mendocino To Pt Arena Out 10 Nm- 829 Pm Pdt Thu Apr 2 2020
.small craft advisory in effect until 3 am pdt Friday...
Tonight..N winds 15 to 25 kt. Waves N 8 ft at 7 seconds.
Fri..NW winds 10 to 20 kt. Waves N 6 ft at 6 seconds...and S 2 ft at 16 seconds.
Fri night..SW winds 5 to 15 kt. Waves nw 5 ft at 6 seconds... And S 2 ft at 15 seconds. Chance of showers.
Sat..S winds 5 to 10 kt. Waves W 4 ft at 8 seconds. Showers and slight chance of tstms.
Sat night..S winds 5 to 10 kt. Waves W 6 ft at 11 seconds.
Sun..W winds 5 to 10 kt. Waves W 6 ft at 9 seconds. Showers and slight chance of tstms.
Mon..N winds 5 to 15 kt. Waves nw 7 ft at 9 seconds.
Tue..N winds 5 to 15 kt. Waves N 5 ft at 9 seconds...and nw 3 ft at 19 seconds.
PZZ400 829 Pm Pdt Thu Apr 2 2020
Synopsis for northern california waters..Northerly winds are forecast to gradually decrease going into Friday. In addition, short-period, locally generated seas will dominate through Friday. Otherwise, a mid-period westerly swell will move through the waters this weekend.


7 Day Forecast for Marine Location Near Shelter Cove, CA
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location: 40.03, -124.07     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 022112 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 212 PM PDT Thu Apr 2 2020

SYNOPSIS. Widespread frost and freeze conditions are expected once again tonight, followed by increasing cloudiness during Friday afternoon as a storm system approaches the region. Precipitation will spread across northwest California during Friday night and Saturday, with additional showers expected Sunday and Monday. Locally heavy mountain snow will be likely during the weekend, along with isolated hail showers across the coast.

DISCUSSION. Clear skies prevail over NWRN CA due to persistent large-scale subsidence. The dry atmosphere and a cool antecedent airmass will favor another night of strong radiational cooling resulting in interior valley freeze conditions, and slightly warmer frost conditions near the coast. Cloud cover will then increase during Friday afternoon ahead of a fast moving upper- level disturbance.

Precipitation associated with the disturbance is forecast to spread across the region during Friday night and continue through part of Saturday. Low-level upslope southerlies occurring over the Trinity Alps will aid in dynamically lowering freezing levels resulting in locally heavy snow. Thus, a winter storm watch has been issued for elevations above 3000 feet over northern portions of Trinity County . the watch includes Scott Mountain Summit on highway 3. Modest destabilization is also forecast to occur over Mendocino County during Saturday afternoon which will yield a non-zero threat for thunderstorms.

Model guidance shows a cold upper trough with 500 mb temperatures near -30 C digging south along the west coast Saturday night through Monday. That trough will aid in renewed shower development across the region, and also assist in lowering snow levels to the 2500-3500 foot level. Thus, potential travel impacts due to snow may occur for passes such as Berry Summit on highway 299, portions of highway 36 in Trinity County, and Scott Mountain Summit on highway 3. The threat for small hail showers and isolated thunderstorms will also exist along the coast eastward across portions of Mendocino and Lake Counties.

The previously mentioned cold upper trough is forecast to exit east away from the region by mid week. This will lead to dissipating shower activity, and the return to drier weather will be accompanied by moderating temperatures.

JMG

AVIATION. VFR conditions prevailed over aviation sites today with only a few cumulus popping up in the Eel Delta Valley and coastal hills. The pressure gradient along the North Coast remained tight enough today to produce breezy/gusty northerlies . particular at ACV. Winds at UKI have remained subdued today as the gradient has been slightly weaker in Eastern Mendocino. However, the pressure gradient will become more relaxed everywhere on Friday resulting in lighter winds. Skies will remain mostly clear overnight followed by increasing clouds Friday afternoon that will precede an approaching weather system Friday night. A minor threat of Vis/Cig reduction at ACV in the morning exists, however local mitigation conditions are most likely. At this point, will put a mention of ground fog in the morning period. Otherwise, dry conditions are expected through daytime Friday. /TA

MARINE. Breezy north winds and steep short period seas will continue across all zones this evening. Winds and seas will then decrease later tonight, with the exception of the southern outer waters, where wind enhancement off the tip of Cape Mendocino will maintain locally gusty winds and small craft seas. Those conditions will then dissipate Friday afternoon as a wind reversal takes place in response to an approaching area of low pressure. Southerly winds will subsequently develop Friday night into Saturday. Otherwise, a mid-period west swell is forecast to move through the waters this weekend.

TDJ/JMG

EKA WATCHES/WARNINGS/ADVISORIES. CA . Frost Advisory from 2 AM to 9 AM PDT Friday for CAZ101>106- 109>115.

Freeze Warning from 2 AM to 9 AM PDT Friday for CAZ102-105-106- 110-111-114.

Winter Storm Watch from late Friday night through late Saturday night for CAZ107.

NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory until 3 AM PDT Friday for PZZ455.

Small Craft Advisory until 9 AM PDT Friday for PZZ475.



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
46213 - Cape Mendocino, CA (094) 40 mi52 min 52°F7 ft
HBYC1 - 9418767 - North Spit, CA 52 mi76 min 53°F1023.4 hPa

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fortuna Rohnerville Airport, CA36 mi2 hrsNNW 12 G 1610.00 miMostly Cloudy46°F37°F71%1023 hPa

Link to 5 minute data for KFOT

Wind History from FOT (wind in knots)
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Last 24hrNW8CalmCalmCalmNW6CalmCalmCalmW5CalmSW5CalmCalmW4NW9N9NW14
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1 day agoCalmCalmNW5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW3N11N13NW13NW15NW17
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2 days agoNW8W7W4CalmE3E5SE5CalmSE6SE7CalmSE3SE3CalmCalmCalmNW12NW11NW10NW11N9NW8NW8N7

Tide / Current Tables for Shelter Cove, California
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Shelter Cove
Click for Map
Thu -- 12:39 AM PDT     3.32 feet Low Tide
Thu -- 03:45 AM PDT     Moonset
Thu -- 05:58 AM PDT     5.33 feet High Tide
Thu -- 06:57 AM PDT     Sunrise
Thu -- 01:25 PM PDT     Moonrise
Thu -- 01:29 PM PDT     0.07 feet Low Tide
Thu -- 07:42 PM PDT     Sunset
Thu -- 08:47 PM PDT     4.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.43.33.64.14.65.15.35.14.53.62.51.40.50.10.10.61.32.23.144.54.74.44

Tide / Current Tables for Punta Gorda, California Current
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Punta Gorda
Click for Map
Thu -- 01:50 AM PDT     0.00 knots Slack
Thu -- 03:47 AM PDT     Moonset
Thu -- 04:26 AM PDT     0.47 knots Max Flood
Thu -- 06:58 AM PDT     Sunrise
Thu -- 07:05 AM PDT     -0.00 knots Slack
Thu -- 10:32 AM PDT     -1.13 knots Max Ebb
Thu -- 01:26 PM PDT     Moonrise
Thu -- 02:39 PM PDT     0.00 knots Slack
Thu -- 05:50 PM PDT     0.92 knots Max Flood
Thu -- 07:43 PM PDT     Sunset
Thu -- 09:11 PM PDT     -0.00 knots Slack
Thu -- 11:24 PM PDT     -0.58 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-0.200.30.40.40.30-0.4-0.8-1.1-1.1-0.9-0.6-0.30.20.60.90.90.80.50.1-0.3-0.6

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 (23,6,7,8)
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Ground Weather Radar Station Eureka, CA
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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.