Wednesday, September23, 2020
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Marine Weather and Tides
Caspar, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:00AMSunset 7:08PM Wednesday September 23, 2020 11:57 AM PDT (18:57 UTC) Moonrise 1:24PMMoonset 10:52PM Illumination 40% Phase: Waxing Crescent; Moon at 6 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- 905 Am Pdt Wed Sep 23 2020
.small craft advisory in effect from Thursday morning through Saturday afternoon...
Today..S winds 5 to 10 kt. Waves nw 4 ft at 10 seconds...and sw 2 ft at 16 seconds.
Tonight..SE winds 5 to 10 kt. Waves W 8 ft at 12 seconds... And nw 3 ft at 18 seconds. A chance of rain.
Thu..NW winds 5 to 10 kt. Waves W 14 ft at 16 seconds...and sw 2 ft at 15 seconds. A chance of showers.
Thu night..NW winds 10 to 15 kt. Waves nw 14 ft at 15 seconds.
Fri..NW winds 10 to 15 kt. Waves nw 11 ft at 14 seconds...and sw 2 ft at 18 seconds.
Sat..NW winds 15 to 25 kt. Waves nw 11 ft at 12 seconds.
Sun..N winds 10 to 20 kt. Waves N 9 ft at 7 seconds.
PZZ400 905 Am Pdt Wed Sep 23 2020
Synopsis for northern california waters..An approaching front will bring moderate southerly winds to the waters N of cape mendocino today. Northerlies will redevelop on Friday as high pressure begins to build over the E pacific. Northerlies will increase starting late this weekend. The first large, W to nw swell of the season will arrive later today and tonight.


7 Day Forecast for Marine Location Near Caspar, CA
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location: 39.35, -123.83     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 231030 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 330 AM PDT Wed Sep 23 2020

SYNOPSIS. Rain will spread over Del Norte and northern Humboldt this evening through Thursday morning, while other areas will mostly remain dry. Hot and dry weather will develop across the region this weekend into early next week.

DISCUSSION. Deep southerly flow ahead of an approaching front has helped to break up any marine stratus along the North Coast early this morning, though there are some patches lingering offshore per satellite imagery. This has yielded partial clearing across northwest CA overnight as mainly just some mid and high level cloud cover streams over the area ahead of the approaching system. The synoptic pattern is dominated by a deep upper level low centered south of the Gulf of Alaska. A potent vort max rounding the base of the trough will move over the Pacific NW later today and drive the front across the northern portion of our area this evening. The precipitation forecast remains on track with rain amounts ranging from a quarter inch around Humboldt Bay to as much as an inch for parts of Del Norte County, and little to no rain elsewhere. Rain will quickly taper off by late Thursday morning, yielding a brief period of benign zonal flow through Friday. Del Norte and northern Humboldt could see a few sprinkles again Friday evening as a weak embedded disturbance moves over the Oregon Coast.

Confidence remains high for hot and dry conditions to develop this weekend into early next week as a strong ridge amplifies over the western CONUS. The main forecast question at this point is whether these conditions will be accompanied by any gusty winds on area ridges and the implications that would have on fire weather concerns. Refer to the fire weather discussion below for details. /CB

AVIATION. Southerly winds in advance of an approaching frontal system will continue to disrupt the onshore flow and marine layer today. As a result, VFR is expected to prevail. Winds will increase today and become gusty primarily around KCEC. Conditions will start to deteriorate this evening and become IFR overnight for KCEC and KACV as moisture with the front pushes onshore and over the coastal ranges of Del Norte and northern Humboldt Counties. Conditions will likely remain VFR at KUKI, though gusty W-NW winds will be possible in the afternoon and evening.

MARINE. S winds will ramp up to around 20 to 25 kt north of Cape Mendo today. Winds will ease up after frontal passage and eventually shift around to light N-NW south of Cape Mendo by Thu. A weaker system will likely maintain a light wind regime across the northern waters through at least Fri. A moderately steep swell from 280 to 300 degrees will build to around 13 to 15 feet on Thu . and then slowly decay through the weekend. Northerly winds will ramp up again south of Cape Mendo Fri->Sat, and then expand north of Cape Mendo over the latter portion of the weekend. Gale force northerly winds will be possible this weekend, with the highest threat south of Cape Mendo on Sunday.

BEACH HAZARDS. A large, early season swell is expected to move into the waters late on Thursday. The forerunners will move in this evening and overnight with wave heights peaking on Thursday. This will bring hazardous surf of up to 18 feet to W and NW facing beaches. The waves may have more run-up than normal due the summer beach bathymetry. Have issued a Beach Hazards Statement addressing this as well as shoaling potential. Have also refreshed the weather story and social media posts. /SEC

FIRE WEATHER. While a dose of rain and higher humidity will help fire weather concerns for the next few days, especially across Humboldt and Del Norte counties, hot and dry weather will return for the weekend and next week. Our neighboring offices have already issued a fire weather watch for adjacent areas to our south and east for the Saturday to Monday timeframe. Surface high pressure will nose into northern California from Oregon as a thermal trough strengthens along the coast, resulting in developing offshore flow by Saturday night and Sunday. However, with little in the way of upper-level support, the winds look like they will be confined more to the Sacramento Valley through the North Bay Hills. This may clip the ridgetops of Lake County, especially east and south of Clear Lake, but still do not have enough confidence yet to issue a watch. Areas farther to the north and west look like they will have lighter winds. Recoveries over the upper slopes and ridges will be poor starting Saturday night, perhaps only in the 20 to 30 percent range, with minimum RH in the teens by Sunday afternoon. /AAD

EKA WATCHES/WARNINGS/ADVISORIES. CA . Beach Hazards Statement from this afternoon through late Thursday night for CAZ101-103-104-109.

NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory from 6 AM Thursday to 3 PM PDT Saturday for PZZ450-455-475.

Small Craft Advisory from 8 AM this morning to 3 PM PDT Saturday 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
46014 - PT ARENA - 19NM North of Point Arena, CA 11 mi37 min Calm G 1.9 62°F1019.7 hPa
ANVC1 - 9416841 - Arena Cove, CA 31 mi57 min WNW 8.9 G 11 66°F 52°F1019.8 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA36 mi61 minN 010.00 miFair73°F41°F32%1018.9 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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Last 24hrCalm4N10N10N9N96N10N5N8CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoNW4E4N11N9NW1165
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N9N5N7CalmCalmCalmCalmSE3CalmCalmCalmCalmCalmCalmCalmCalm
2 days agoN4NW3CalmCalmW7NW8NE3N4N4W3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm3

Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
Click for Map
Wed -- 05:27 AM PDT     4.41 feet High Tide
Wed -- 07:04 AM PDT     Sunrise
Wed -- 10:25 AM PDT     2.88 feet Low Tide
Wed -- 02:23 PM PDT     Moonrise
Wed -- 04:22 PM PDT     5.82 feet High Tide
Wed -- 06:56 PM PDT     First Quarter
Wed -- 07:09 PM PDT     Sunset
Wed -- 11:41 PM PDT     0.06 feet Low Tide
Wed -- 11:52 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.61.42.33.244.44.44.13.63.22.92.93.33.94.75.45.85.75.24.22.91.70.70.2

Tide / Current Tables for Point Cabrillo, California Current
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Point Cabrillo
Click for Map
Wed -- 02:31 AM PDT     0.99 knots Max Flood
Wed -- 05:57 AM PDT     -0.00 knots Slack
Wed -- 07:04 AM PDT     Sunrise
Wed -- 08:06 AM PDT     -0.59 knots Max Ebb
Wed -- 11:27 AM PDT     0.00 knots Slack
Wed -- 02:14 PM PDT     0.64 knots Max Flood
Wed -- 02:23 PM PDT     Moonrise
Wed -- 05:03 PM PDT     -0.00 knots Slack
Wed -- 06:56 PM PDT     First Quarter
Wed -- 07:09 PM PDT     Sunset
Wed -- 08:24 PM PDT     -1.25 knots Max Ebb
Wed -- 11:52 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.7110.80.5-0-0.4-0.6-0.5-0.3-0.10.20.50.60.60.40-0.5-0.9-1.2-1.2-1-0.7

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
Ground Weather Radar Station Eureka, CA
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weather_mapweather_map weather_map


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