Monday, August3, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Westhaven-Moonstone, 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 6:13AMSunset 8:31PM Monday August 3, 2020 10:25 AM PDT (17:25 UTC) Moonrise 8:02PMMoonset 5:02AM Illumination 100% Phase: Full Moon; Moon at 14 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
    EDIT      (on/off)   Help
PZZ450 Pt St George To Cape Mendocino Out 10 Nm- 839 Am Pdt Mon Aug 3 2020
Today..NW winds 5 kt. Waves W 3 ft at 9 seconds.
Tonight..NW winds 5 to 10 kt. Waves N 4 ft at 4 seconds. Patchy fog.
Tue..NW winds 5 to 10 kt. Waves nw 5 ft at 5 seconds. Patchy fog.
Tue night..N winds 5 to 10 kt. Waves nw 5 ft at 5 seconds.
Wed..N winds 5 to 15 kt. Waves nw 5 ft at 6 seconds.
Thu..N winds 5 to 15 kt. Waves N 5 ft at 5 seconds...and nw 3 ft at 11 seconds.
Fri..N winds 5 to 15 kt. Waves N 7 ft at 7 seconds.
PZZ400 839 Am Pdt Mon Aug 3 2020
Synopsis for northern california waters..Winds will be stronger in the southern outer waters and south of cape mendocino, with locally steep seas as well. Strong northerly winds are expected to expand into the northern outer waters starting Tuesday.


7 Day Forecast for Marine Location Near Westhaven-Moonstone, CA
   Hourly   EDIT   Help
location: 41.05, -124.1     debug


Area Discussion for - Eureka, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KEKA 031103 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 403 AM PDT Mon Aug 3 2020

SYNOPSIS. Another day of clearing along the coast is expected by at least the afternoon north of Cape Mendocino while areas farther south could stay clear all day. Interior areas will remain clear and dry. A stray mountain thunderstorm will be possible Tuesday and Wednesday afternoons.

DISCUSSION. Coastal Northwest California received some welcome sunshine yesterday as the passing upper low was able to mix out the coastal stratus at least for a few hours. The stratus has redeveloped north of Cape Mendocino while offshore flow has kept the entire Mendocino coast clear as of this writing. There may be a few coastal clouds that develop along the Mendocino coast this morning but generally sunny conditions are in store for all of Mendocino County today. Stratus along the Humboldt and Del Norte coasts isn't too expansive and with increasing north winds just off the coast the stratus should mix out for more sunshine this afternoon.

As the passing upper low moves northeast today, the low will leave a small piece of energy behind which will park over Northern California Monday through Wednesday. Though this will keep an upper level troughing over the region, 850 mb temperatures warm slightly, indicating the potential for a slightly stronger marine inversion and more stratus along the coast. Have opted to keep a persistence forecast at this point but the stratus forecast has become a bit more uncertain than was thought a few days ago.

In addition to the coastal cloud uncertainty, the upper feature may also bring just enough instability to allow for convective buildups over the mountains and possibly a thunderstorm. The best instability is currently indicated over the far northern reaches of the mountains in Humboldt and Trinity counties Tuesday and Wednesday afternoons, shifting farther east on Wednesday as compared to Tuesday. At this point the upper end potential may be only a single storm in the forecast area but still worth a slight chance mention.

Late in the week this upper feature moves east out of the area leaving split upper level flow over Northwest California. There appears to be a decent potential for dry northeasterly flow in the northern half of the forecast area with a substantial jump in warm air aloft. A 5-10 degree jump in high temperatures across the interior is likely from Thursday to Sunday and conditions might become quite dry, especially at higher elevations, as offshore flow develops. /RPA

AVIATION. A northerly wind regime has coastal stratus advecting south this morning. Coastal low lying areas from Brookings down to the Eel River Valley have stratus, albeit thinner than previous nights. KCEC ceilings have been overcast around 1200 feet with MVFR conditions. KACV has similar conditions which settled in much later. These MVFR categories should persist through to the afternoon and improve on the North Coast. Later this evening, this will be combated by increasing and deepening marine air with more onshore flow heading into Tuesday and Wednesday, which will likely make it cloudier at the coast and farther inland for midweek. Thunderstorm potential near the Northern Trinity and Northeastern Humboldt mountains Tuesday and Wednesday should be considered in flight plans as well. Light north winds are expected at KUKI this morning. Gusty north winds should increase by the late afternoon and ease tonight at KUKI. /EYS

MARINE. North winds are most prevalent in the southern outer waters and South of Cape Mendocino, so SC.Y has been extended. The winds will proceed to expand in coverage tonight throughout the Northern Outer waters with marginal Small Craft Advisory conditions. The Southern Inner waters have been included in the SC.Y, beginning this afternoon.

Tuesday through the end of the week, fresh to strong northerly winds will expand into the remainder of the waters, causing seas to increase as well. As of now it appears that these winds will remain below Gale strength until at least late in the week, although seas could be slightly larger and steeper. Winds are expected to increase slightly more Friday and beyond, although the magnitude remains uncertain. /EYS

FIRE WEATHER. An upper level feature will bring a small cooling trend through mid week. With the slight cooling there will also be a small increase in RH and higher minimum afternoon RH values through Thursday. The upper level feature will also bring a slight potential for a thunderstorm over the higher terrain of northeastern Humboldt and northern Trinity counties Tuesday and Wednesday afternoons. Potential remains very low and headlines in the fire weather forecast still don't seem warranted. Warmer temperatures and dryer conditions are expected to return late in the week into this coming weekend with light offshore flow possible, particularly in Del Norte and northern Humboldt counties. /RPA

EKA WATCHES/WARNINGS/ADVISORIES. CA . None. NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory from 9 PM this evening to midnight PDT Wednesday night for PZZ470.

Small Craft Advisory from 3 PM this afternoon to midnight PDT Wednesday night for PZZ455.

Small Craft Advisory until midnight PDT Wednesday night 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
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46244 - Humboldt Bay, North Spit, CA 17 mi60 min 57°F3 ft
HBYC1 - 9418767 - North Spit, CA 21 mi50 min 62°F1021.2 hPa
NJLC1 21 mi74 min NNE 9.7 G 12 59°F
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 34 mi36 min N 3.9 G 3.9 57°F 56°F3 ft1021.5 hPa56°F
CECC1 - 9419750 - Crescent City, CA 48 mi56 min WNW 2.9 G 5.1 61°F 57°F1021.2 hPa

Wind History for North Spit, Humboldt Bay, CA
(wind in knots)    EDIT      (on/off)   Help
Last
24hr
1 day
ago
2 days
ago

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Arcata / Eureka, Arcata Airport, CA4 mi33 minWNW 610.00 miOvercast60°F57°F90%1021.3 hPa

Link to 5 minute data for KACV

Wind History from ACV (wind in knots)
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
Last 24hrNW9NW6NW10NW13NW14NW13NW14NW14NW12N11N5CalmNE3E3E3E4E4E3E3CalmCalmCalmNW5NW6
1 day agoNW4NW9NW13NW13NW13NW16NW16NW15--N7N4CalmCalmCalmCalmCalmCalmCalmN3NW3E3SE3NW4NW5
2 days agoN5CalmNW8NW11NW12NW8NW8NW11CalmNW3SE3SE4E3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW6

Tide / Current Tables for Trinidad Harbor, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Trinidad Harbor
Click for Map
Mon -- 06:02 AM PDT     Moonset
Mon -- 06:14 AM PDT     Sunrise
Mon -- 06:30 AM PDT     -1.02 feet Low Tide
Mon -- 08:59 AM PDT     Full Moon
Mon -- 01:09 PM PDT     5.71 feet High Tide
Mon -- 06:18 PM PDT     2.68 feet Low Tide
Mon -- 08:29 PM PDT     Sunset
Mon -- 09:02 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
7.16.34.93.11.3-0.1-0.9-0.9-0.21.22.84.25.35.75.54.83.93.12.72.83.54.55.76.6

Tide / Current Tables for Arcata Wharf, Humboldt Bay, California
   EDIT      (on/off)   Help   One Week of Data
Arcata Wharf
Click for Map
Mon -- 12:29 AM PDT     7.74 feet High Tide
Mon -- 06:02 AM PDT     Moonset
Mon -- 06:15 AM PDT     Sunrise
Mon -- 07:40 AM PDT     -1.00 feet Low Tide
Mon -- 08:59 AM PDT     Full Moon
Mon -- 02:22 PM PDT     5.90 feet High Tide
Mon -- 07:21 PM PDT     2.98 feet Low Tide
Mon -- 08:29 PM PDT     Sunset
Mon -- 09:01 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
7.67.66.95.53.71.70.1-0.8-1-0.312.64.15.35.95.85.24.33.533.13.84.96.1

Weather Map
       (on/off)   Help Weather Map
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 (13,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Eureka, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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.