Saturday, January25, 2020
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Marine Weather and Tides
Myrtle, 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 7:31AMSunset 5:26PM Saturday January 25, 2020 6:13 AM PST (14:13 UTC) Moonrise 8:20AMMoonset 6:20PM Illumination 0% Phase: New Moon; Moon at 0 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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PZZ415 Expires:201909161915;;886895 Fzus76 Keka 161819 Mwseka Marine Weather Statement National Weather Service Eureka Ca 1119 Am Pdt Mon Sep 16 2019 Pzz410-415-450-470-161915- 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 259 Am Pst Sat Jan 25 2020
Synopsis for northern california waters..Southerly winds will increase through the day on Saturday, then again on Sunday afternoon following a brief lull Sunday morning. The strongest winds will be found north of cape mendocino. Another large westerly swell will move through the waters during the weekend.


7 Day Forecast for Marine Location Near Myrtle, CA
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location: 40.8, -124.14     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 251247 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 447 AM PST Sat Jan 25 2020

SYNOPSIS. Rainy conditions can be expected today through mid-day Sunday, with only short breaks in between. Rain will diminish Sunday afternoon, but additional light rain will be possible in Del Norte and Humboldt county Sunday night and Monday, and everywhere Tuesday. More light rain is possibly late Wednesday, with a warming and drying trend through the end of the week.

DISCUSSION. After a brief lull in precipitation overnight, rain is beginning to redevelop across Humboldt and Del Norte counties as a warm front approaches the coast. This rain will steadily increase through the day, kicking off what will be a wet and generally gloomy weekend for the most part. Rain rates will likely peak in between the mid afternoon and early evening hours, perhaps approaching 1/4 inch to 1/3 inch per hour in favorable mountain ranges like the King Range, and between 1/10 inch and 1/4 inch per hour elsewhere. After another short lull in rain rates during the late evening, another surge in rain can be expected overnight and early Sunday morning, again with similar moderate to heavy rain rates as the round prior.

In any case, rain rates such as these over a period of roughly 12 hours (after subtracting the lulls) is not likely to generate major negative impacts throughout the region, and can generally be filed as "beneficial". However, some areas may see some minor flooding issues like ponding on roadways and in poor drainage areas, along with rapidly rising creeks and small streams. Main stem rivers are not expected to flood, or even approach flood stage, although they will see increased flows. By Sunday afternoon rain will gradually diminish, with an outside chance at a few peeks of sun along the coast during the mid to late afternoon. By the time all is said and done, most areas in Humboldt and Del Norte counties will see an additional 1 to 2 inches of rain, with some totals climbing to near 3 inches in the mountains. In Mendocino and Trinity counties, an additional 1/2 to 1 inch of rain is more likely. Snow levels will remain generally high throughout the event, keeping heavy snow accumulations restricted to the taller peaks of the Trinity Alps. Snow levels will likely fall to near 4500 feet by Sunday morning, which may bring a light dusting to Scott Mountain Summit on Highway 3.

By Sunday night, an atmospheric river will begin to impact primarily the Oregon coast, bringing more heavy rain to our northern neighbors. However, while we will likely not bear the brunt of this next round of rain, some light rain will likely extend into Del Norte and northern Humboldt counties overnight through Monday, maintaining gloomy conditions in places like Crescent City, Gasquet and Klamath. Meanwhile, Mendocino and Trinity counties will likely stay dry through Monday evening. Overnight Monday through Tuesday, a cold front will push slightly heavier rain south and into most areas, although the heaviest rain will once again remain in Del Norte and Humboldt counties. Once again, major negative impacts are not anticipated.

From Wednesday through the end of the week, building high pressure will gradually push the storm track farther and farther north into the Pacific northwest. This will limit that ability of cold fronts to bring substantial rain into the region, although additional light rain will be possible late Wednesday. Temperatures will also likely increase gradually through the end of the week, perhaps reaching well into the 60s by Friday across interior valleys. /BRC

AVIATION. Yet another weak front moved ashore early this morning, with LIFR to IFR ceilings and visibilities north of Cape Mendocino. These should clear out later this morning with widespread MVFR to VFR conditions arriving by midday. However another frontal system is expected to impact the area this evening, which should incrementally drop regional ceilings and visibilities to IFR once again by late tonight. /TDJ

MARINE. Light southerly winds persist this morning before increasing once again across the waters this afternoon, peaking late tonight. Southerlies then weaken somewhat tomorrow morning and shift westerly through the first half of the day, but then turn back to relatively southerly and fluctuate around low- end SCY levels for the foreseeable future as a series of weak upper- level shortwave troughs pass overhead. A persistent local wind speed maximum in the northern outer waters will continue to oscillate in strength with each passing pulse.

Seas weaken slightly this morning as a long period west swell decays. Current model guidance is showing combined seas briefly dropping below 10 ft this afternoon and evening for the inners and southern outers . thus have kept the current trajectory of dropping SCY's for these zones this morning. This will be re- evaluated with the morning update. Short period seas increase as the day progresses in response to accelerating southerlies, likely reaching SCY levels in the northern waters by tonight, but this short period energy should filter out by Sunday morning. Otherwise, yet another solid west swell is expected to fill in on Sunday afternoon, keeping seas elevated well into next week. /TDJ

EKA WATCHES/WARNINGS/ADVISORIES. CA . None. NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory until 9 AM PST this morning for PZZ450-455- 475.

Small Craft Advisory until 9 AM PST Sunday 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
HBYC1 - 9418767 - North Spit, CA 5 mi97 min 51°F1018.2 hPa
46244 - Humboldt Bay, North Spit, CA 13 mi43 min 52°F13 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 21 mi33 min S 16 G 21 55°F 52°F1018.3 hPa54°F
46213 - Cape Mendocino, CA (094) 47 mi43 min 53°F13 ft

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Arcata / Eureka, Arcata Airport, CA13 mi20 minN 04.00 miLight Rain Fog/Mist56°F53°F90%1019.2 hPa

Link to 5 minute data for KACV

Wind History from ACV (wind in knots)
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Last 24hrSE4SE3E3SE4S4S3S5CalmW5CalmCalmCalmCalmCalmCalmS6S6S7SE10S7SE9CalmCalmCalm
1 day agoCalmCalmCalmN3E3NE3CalmE3S5NW3E3SW4SE5SE7SE9S7S14S8S6S5SE4S4S4SE3
2 days agoSE4SE6SE4SE7SE7SE9SE7SE4SW4SW6CalmCalmSE6S5SE4CalmE4CalmE4CalmSE5SE9SE6E3

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
Click for Map
Sat -- 01:27 AM PST     6.27 feet High Tide
Sat -- 05:57 AM PST     3.08 feet Low Tide
Sat -- 07:32 AM PST     Sunrise
Sat -- 08:20 AM PST     Moonrise
Sat -- 12:12 PM PST     7.99 feet High Tide
Sat -- 05:24 PM PST     Sunset
Sat -- 06:20 PM PST     Moonset
Sat -- 06:53 PM PST     -0.87 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.66.26.15.44.33.43.13.44.25.46.67.587.76.74.92.80.8-0.5-0.9-0.40.72.23.7

Tide / Current Tables for Humboldt Bay Entrance, California
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Humboldt Bay Entrance
Click for Map
Sat -- 12:47 AM PST     5.05 feet High Tide
Sat -- 05:52 AM PST     3.02 feet Low Tide
Sat -- 07:33 AM PST     Sunrise
Sat -- 08:20 AM PST     Moonrise
Sat -- 11:31 AM PST     6.63 feet High Tide
Sat -- 05:25 PM PST     Sunset
Sat -- 06:21 PM PST     Moonset
Sat -- 06:48 PM PST     -0.86 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.954.84.23.63.233.44.15.166.56.664.83.31.70.3-0.6-0.8-0.30.82.23.5

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.
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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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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.