Monday, December16, 2019
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Marine Weather and Tides
Ferndale, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:32AMSunset 4:51PM Monday December 16, 2019 6:20 AM PST (14:20 UTC) Moonrise 9:53PMMoonset 11:25AM Illumination 77% Phase: Waning Gibbous; Moon at 20 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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PZZ410 1119 Am Pdt Mon Sep 16 2019
.isolated strong Thunderstorms over the coastal waters... The areas affected include... Coastal waters from point saint george to cape mendocino ca out 60 nm... At 1114 am, doppler radar indicated a few strong Thunderstorms, capable of producing wind gusts to around 30 knots, from 5 nm northwest of orick to 45 nm west of patrick's point. These storms are moving southeast at 10 knots. Precautionary/preparedness actions... Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until these storms passes. && lat...lon 4174 12416 4145 12406 4123 12411 4114 12416 4105 12415 4106 12414 4102 12411 4070 12426 4071 12426 4058 12435 4083 12572 4096 12565 4178 12460 4178 12426
PZZ400 307 Am Pst Mon Dec 16 2019
Synopsis for northern california waters..Light southerly winds will increase on Tuesday. Southerlies will diminish on Wednesday, with stronger S winds expected by the end of the week. A large, long period nw swell will very slowly subside through Tuesday. Another nw swell train will arrive Tuesday night and persist through the remainder of the period.


7 Day Forecast for Marine Location Near Ferndale, CA
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location: 40.43, -124.42     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 161410 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 610 AM PST Mon Dec 16 2019

SYNOPSIS. High pressure will yield mostly sunny skies and light winds today. Considerable cloud cover and locally breezy southeasterly winds are expected on Tuesday before a warm front brings increasing probabilities for rain and windy conditions Wednesday night through Thursday. Moderate to heavy rain will be possible this weekend as a front moves across the area.

DISCUSSION. Upper ridging has been resulting in mostly clear skies across the forecast area this morning. As is almost always the case this time of year under clear skies and warming aloft, considerable low clouds and patchy fog has developed over many of the interior valleys of Northwest California. The low clouds and fog will most likely mix out with the daytime heating and mixing later this morning, though with the low December sun angle, it may take til early afternoon to completely scour out.

The next item of interest is a storm/frontal system currently near 140W early this morning. This system will push inside 130W on Tuesday and then elongate and split offshore. It will generate considerable cloud cover as well as locally breezy southeasterly winds. The dry southeasterly and easterly low level flow will likely keep the rain offshore til the 500mb trough passes overhead Tuesday night into Wednesday morning. The GFS and ECMWF were in better agreement on the trough passage, however the GFS was wetter, especially across Mendocino county. If the GFS pans out, 0.25-0.50 of an inch rain will occur in Mendocino county late Tuesday night into Wednesday morning. This will need to be monitored and the next shift may need to boost precip chances and rain amounts.

The precip should start to wind down in the south by Wednesday afternoon, however a wetter storm may start to spread rain into the northern portion of the forecast area as early as Wednesday afternoon. The bulk of the rain with this wetter storm will most likely hold off til late Wednesday night into Thursday. The brunt of the rain with this moist westerly jet will be aimed at the Pacific NW, with Del Norte county likely receiving bouts of heavy rain on Thursday. Current estimates are for 2 to 3 inches from 4PM Wednesday to 10PM Thursday. The heavy rain is expected to tapper off Thursday night and Friday which will mitigate the potential for flooding. A wave should form on the stationary front on Friday as the flow aloft amplifies. Windy conditions are likely in advance of the front that is expect to pass through NW Cal on Saturday. Heavy rain will be possible with frontal passage throughout the forecast. Once again due to the short duration of the heavy rain, flooding concerns remain low at the moment. There are still discrepancies on the timing of frontal passage which may be delayed til afternoon and evening on Saturday. Cooler air aloft and instability will follow behind the front on Sunday for possible showers and lower snow levels. This period of wet and unsettled weather from Thursday trough the weekend will overall be beneficial since we are well below normal on seasonal rainfall.

AVIATION. Low clouds and fog are evident on the nighttime satellite imagery across many inland valleys (including at KUKI). In addition some high clouds are streaming SE across Mendocino County, and mid-level cloudiness is noted brushing N Del Norte County. Otherwise, skies are clear across the area. Inland low clouds should mostly clear by midday. High cloudiness will continue to infiltrate the area from time to time, with clouds thickening tonight. Winds will be generally light across the area, but wind speeds are expected to increase at KACV after midnight tonight, with some gusts to 15 knots possible. /SEC

MARINE. Light southerly winds today will increase tonight, eventually increasing to advisory level across the outer waters by early Tuesday morning. Have gone ahead and hoisted a Small Craft Advisory for that area from 3 AM Tuesday through Wednesday night. There may be a brief period of marginal gale force gusts across the S outer waters Tuesday afternoon, but these winds are expected to be marginal and short-lived. Wind speeds are expected to decrease again on Wednesday, then more strong southerlies are possible by Thursday. By the end of the forecast period (late Friday), there is increasing divergence between the model wind fields, and forecast confidence drops to low. W to NW swell will continue through Tuesday. A fresh NW swell train is expected to arrive late Tuesday. This swell will persist through the period. /SEC

EKA WATCHES/WARNINGS/ADVISORIES. CA . None. NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory from 3 AM Tuesday to midnight PST Wednesday night for PZZ470-475.



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) 19 mi21 min 55°F8 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 20 mi31 min ESE 14 G 19 46°F 54°F9 ft1026.2 hPa44°F
HBYC1 - 9418767 - North Spit, CA 26 mi45 min 53°F1027 hPa
46244 - Humboldt Bay, North Spit, CA 32 mi21 min 54°F9 ft

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fortuna Rohnerville Airport, CA17 mi46 minSE 1110.00 miFair37°F35°F93%1027.1 hPa

Link to 5 minute data for KFOT

Wind History from FOT (wind in knots)
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Last 24hrE7E7E9E8E7E7SE6SE4W3CalmW5SW4SW3SE6SE5S5SE6SE7SE7SE9SE7SE8SE9SE8
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W6CalmN3CalmNW6CalmE6E7E8E7E6
2 days agoSE6SE11E8E10E10E10SE12E7SE12SE6SW3SE3SE5CalmW6NW12
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NW7W5CalmW3CalmCalmCalmSE4

Tide / Current Tables for Cape Mendocino, California
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Cape Mendocino
Click for Map
Mon -- 02:56 AM PST     4.89 feet High Tide
Mon -- 07:34 AM PST     Sunrise
Mon -- 08:02 AM PST     3.10 feet Low Tide
Mon -- 11:24 AM PST     Moonset
Mon -- 01:23 PM PST     5.65 feet High Tide
Mon -- 04:52 PM PST     Sunset
Mon -- 08:41 PM PST     -0.60 feet Low Tide
Mon -- 09:52 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.83.94.64.94.74.23.73.33.13.33.84.55.25.65.6542.71.30.2-0.5-0.6-0.10.8

Tide / Current Tables for Punta Gorda, California Current
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Punta Gorda
Click for Map
Mon -- 03:26 AM PST     -0.00 knots Slack
Mon -- 05:36 AM PST     -0.68 knots Max Ebb
Mon -- 07:33 AM PST     Sunrise
Mon -- 08:47 AM PST     0.00 knots Slack
Mon -- 11:23 AM PST     Moonset
Mon -- 11:35 AM PST     0.64 knots Max Flood
Mon -- 02:10 PM PST     -0.00 knots Slack
Mon -- 04:52 PM PST     Sunset
Mon -- 05:44 PM PST     -1.38 knots Max Ebb
Mon -- 09:33 PM PST     0.00 knots Slack
Mon -- 09:52 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.110.70.2-0.3-0.6-0.7-0.5-0.20.10.40.60.60.40.1-0.4-0.9-1.3-1.4-1.1-0.7-0.30.20.7

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 (9,2,3,4)
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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 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.