Thursday, July29, 2021
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Marine Weather and Tides
Eureka, CA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:09AMSunset 8:36PM Thursday July 29, 2021 2:04 AM PDT (09:04 UTC) Moonrise 10:57PMMoonset 11:06AM Illumination 75% 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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PZZ415 Expires:202103071000;;120025 fzus76 keka 070902 mwseka marine weather statement national weather service eureka ca 102 am pst Sun mar 7 2021 pzz410-415-450-455-470-475-071000- 102 am pst Sun mar 7 2021 a marine weather statement has been issued for the following areas... Coastal waters from cape mendocino to pt. Arena ca out 10 nm... Coastal waters from pt. St. George to cape mendocino ca out 10 nm... Humboldt bay... Humboldt bay bar... Waters from cape mendocino to pt. Arena ca from 10 to 60 nm... Waters from pt. St. George to cape mendocino ca from 10 to 60 nm... At 1259 am pst, doppler radar indicated a line of showers, capable of producing winds to around 30 knots. These showers were located along a line extending from 19 nm west of trinidad head to 34 nm southwest of cape mendocino, moving northeast at 30 knots. Precautionary/preparedness actions... Water spouts are possible along with locally higher waves. Boaters should seek safe harbor immediately until these showers pass. Mariners can expect gusty winds to around 30 knots and locally higher waves. Boaters should seek safe harbor immediately until these storms pass. && lat...lon 4123 12411 4114 12416 4098 12412 4076 12423 4087 12415 4085 12409 4083 12408 4080 12418 4070 12421 4070 12427 4071 12427 4044 12441 4032 12435 4026 12436 4016 12425 3994 12505 4121 12458 4143 12406
PZZ400 811 Pm Pdt Wed Jul 28 2021
Synopsis for northern california waters..Gentle to fresh winds will persist tonight and through Thursday. Seas will mainly be wind driven and range from 3 to 5 feet. Slightly stronger winds are expected for Friday and into the weekend.


7 Day Forecast for Marine Location Near Eureka, CA
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location: 40.81, -124.14     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 282150 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 250 PM PDT Wed Jul 28 2021

SYNOPSIS. Temperatures across interior portions of northwest California will steadily warm during the week, with highs ranging from 100 to 110 Friday afternoon. Conditions will then cool during the weekend into early next week. Otherwise, isolated to scattered thunderstorms will be possible across the interior mountains Thursday, Friday, and Saturday.

DISCUSSION. A pronounced anticyclone was evident in water vapor imagery Tuesday afternoon, while troughing persisted over the NERN PAC. Upper-level southerlies were present in between those two features over the west coast. Moisture with that flow regime is currently insufficient for shower development despite embedded perturbations lifting north across the region. Conditions are forecast to change Thursday afternoon as steep midlevel lapse rates become collocated with strong boundary layer destabilization occurring over the Trinity Alps and Yolla Bolly Mountains. Sufficient CAPE for thunderstorm development is forecast to occur as a result during the afternoon/evening. Storm/shower activity will dissipate Thursday night, followed by another period of even stronger destabilization Friday afternoon that will favor greater storm coverage and possibly a risk of strong outflow winds and marginally severe hail given SBCAPE values ranging from 500-1500 J/kg and 0-6 km bulk shear values near 30 kt occurring in conjunction with hot deeply mixed boundary layer thermodynamic profiles. A third round of generally isolated storm development will be possible Saturday afternoon as well.

Otherwise, model statistical guidance shows an elevated heat risk will be probable on Friday with highs ranging from 100 to 110 across interior valleys. A heat advisory has been issued for that potential After Friday. the upper flow regime transitions to southwesterly, while ridging and intense surface heating shift east of the region. That evolution will favor a cooling trend across the interior, with highs sliding back into the 80s and 90s by early next week.

Garner

AVIATION. The marine layer pushed off the coast this morning and now there are VFR conditions at the TAF sites and most of the area. The profiler shows the marine layer remains shallow and the stratus is lingering just a couple miles off KACV. This makes it like the stratus will return quickly this evening, especially at KACV. KCEC may be a bit later as the stratus remains farther off the coast. With the shallow marine layer, expect most of the inland areas will remain clear tonight with the exception of the river valleys near the coast that typically see stratus. With the shallow marine layer tonight the CIGS and VIS are expected to be low once again. A period quarter mile visibility is not out of the question, although only dropped it to 1/2 mile in the current forecast. Thursday the marine inversion is expected to strengthen as high pressure builds in warming temperatures aloft. This may slow the clearing Thursday, but some clearing is still expected in the afternoon. MKK

MARINE. Winds and seas remain fairly calm this afternoon. Currently a small northwest wave that is a combination wind wave and fresh swell is around 3 to 5 feet 3 to 6 seconds. In the southern waters there is also a 2 to 3 foot southerly swell. Tonight winds will remain mainly in the 10 to 15 kt range in the outer waters with a few locally higher gusts. These conditions are expected to continue to into Thursday and Thursday night. These will be on the border of needing a small craft advisory, but currently it looks like conditions will remain below criteria. The southerly swell is expected to diminish tonight and not be a factor after that.

Late Thursday night into Friday models are showing a subtle strengthening in the northerly winds to around 15 to 25 kt and seas to around 5 to 8 feet. This will likely be enough to warrant small craft advisories at least in some areas. Conditions are expected to remain fairly similar into early next week. MKK

FIRE WEATHER. A hot and unstable environment is forecast to develop across the mountains of Trinity, northeast Mendocino, and far northern Lake Counties during the afternoon hours of Thursday, Friday, and Saturday. Isolated to scattered thunderstorm development will be possible as a result. That activity will likely be dry given the presence of deep inverted-v thermodynamic profiles evident in model forecast soundings. Conditions will subsequently be favorable for fire starts due to dry thunderstorms occurring across dry fuels.

Garner

EKA WATCHES/WARNINGS/ADVISORIES. CA . Heat Advisory from 10 AM to 8 PM PDT Friday for CAZ107-108- 110>115.

NORTHWEST CALIFORNIA COASTAL WATERS . None.

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

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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
HBXC1 4 mi80 min 55°F
HBYC1 - 9418767 - North Spit, CA 5 mi89 min 55°F1016.8 hPa
NJLC1 6 mi101 min Calm G 0 52°F
46244 - Humboldt Bay, North Spit, CA 13 mi39 min 51°F3 ft
TDPC1 17 mi65 min 51°F
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 21 mi35 min N 5.8 G 7.8 52°F 50°F1015.9 hPa52°F
46213 - Cape Mendocino, CA (094) 47 mi39 min 51°F5 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 mi72 minN 010.00 miFair52°F50°F93%1016.6 hPa
Fortuna Rohnerville Airport, CA18 mi70 minN 010.00 miFair50°F50°F100%1016.3 hPa

Link to 5 minute data for KACV

Wind History from ACV (wind in knots)
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Last 24hrCalmN3E3E3NW3NW3CalmW3W4SW5W7W4W6W6W5NW4NW4CalmCalmCalmCalmCalmCalmCalm
1 day agoS5CalmNE3CalmNW3S3NW3CalmW5CalmE3S3W6NW3CalmNW3N4NW3CalmS4CalmNW3CalmCalm
2 days agoSE4CalmCalmNW3CalmSW4SW3SW3W5SW5SW9SW8SW10SW9--W5SW5SE7S5S7S10S9S9SE6

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
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Thu -- 04:32 AM PDT     6.22 feet High Tide
Thu -- 06:10 AM PDT     Sunrise
Thu -- 10:36 AM PDT     0.77 feet Low Tide
Thu -- 12:06 PM PDT     Moonset
Thu -- 05:42 PM PDT     6.90 feet High Tide
Thu -- 08:34 PM PDT     Sunset
Thu -- 11:29 PM PDT     2.20 feet Low Tide
Thu -- 11:56 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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33.94.85.76.16.25.64.431.70.90.81.42.43.85.16.16.86.96.35.342.92.3

Tide / Current Tables for Humboldt Bay (south jetty), California (expired 1984-12-31)
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Humboldt Bay (south jetty)
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Thu -- 04:06 AM PDT     5.14 feet High Tide
Thu -- 06:11 AM PDT     Sunrise
Thu -- 10:40 AM PDT     0.63 feet Low Tide
Thu -- 12:06 PM PDT     Moonset
Thu -- 05:20 PM PDT     5.69 feet High Tide
Thu -- 08:35 PM PDT     Sunset
Thu -- 11:35 PM PDT     1.97 feet Low Tide
Thu -- 11:56 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.63.44.24.95.154.33.42.31.40.80.71.12.13.34.45.25.75.65.14.33.32.52.1

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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