Saturday, April4, 2020
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Marine Weather and Tides
Caspar, 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 6:49AMSunset 7:41PM Saturday April 4, 2020 8:20 PM PDT (03:20 UTC) Moonrise 2:48PMMoonset 4:12AM Illumination 91% Phase: Waxing Gibbous; Moon at 12 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- 207 Pm Pdt Sat Apr 4 2020
Tonight..S winds 10 to 20 kt. Waves W 7 ft at 11 seconds... And S 2 ft at 14 seconds. Showers.
Sun..W winds 5 to 10 kt. Waves W 6 ft at 9 seconds...and S 2 ft at 13 seconds. Showers likely and slight chance of tstms.
Sun night..NE winds 5 kt. Waves W 7 ft at 9 seconds. Chance of showers and slight chance of tstms.
Mon..N winds 5 to 10 kt. Waves nw 6 ft at 9 seconds.
Mon night..N winds 5 to 15 kt. Waves nw 6 ft at 9 seconds.
Tue..N winds 10 to 20 kt. Waves N 8 ft at 7 seconds...and nw 5 ft at 19 seconds.
Wed..N winds 5 to 15 kt. Waves N 8 ft at 7 seconds...and nw 5 ft at 15 seconds.
Thu..NW winds 5 to 15 kt. Waves N 6 ft at 7 seconds...and nw 5 ft at 13 seconds.
PZZ400 207 Pm Pdt Sat Apr 4 2020
Synopsis for northern california waters..Breezy south to southwest winds will continue through Sunday morning. Otherwise, a mid-period westerly swell will move through the waters tonight. Stronger northerly winds are expected by the middle of next week.


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 042138 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 238 PM PDT Sat Apr 4 2020

SYNOPSIS. Numerous showers will occur across the region through Monday. Heavy snow will be likely across portions of the interior mountains, while small hail and an isolated thunderstorm will be possible elsewhere. Drier and warmer weather is then expected during middle to later portions of next week.

DISCUSSION. An upper disturbance was progressing east across NWRN CA this afternoon. A shield of stratiform precipitation spreading across a cold antecedent airmass located over Trinity County led to a period of snow at elevations as low as 2000 feet. Model guidance indicates snow levels will rise to the 3000-4000 foot level this evening, which will confine snowfall to the higher peaks and ridges located across the interior. Impactful snowfall accumulations are expected at Scott Mountain Summit on HWY 3, portions of HWY 36 in southern Trinity County, and possibly Oregon Mountain on HWY 299. Thus, the inherited winter storm warning has been expanded to include portions of southern Trinity, and is now valid for elevations above 3000 feet through 11 PM Sunday.

Current water vapor imagery shows a second upper trough digging southward across the NERN PAC. That trough will evolve into a closed upper low during the next 24 hours as it approaches coastal NW CA. Cooling midlevel temperatures will aid in steepening lapse rates and increase CAPE values modestly. In addition, forecast soundings indicate EL temperatures will fall below -20C during part of Sunday morning and afternoon. Thus, isolated thunderstorms will be possible along with hail showers over the coast and interior areas.

Otherwise, the upper low is forecast to move south and east of the region during the first half of next week. Wrap around showers may initially impact NRN CA during Monday, but a drier more subsident synoptic regime will set in by mid week resulting in near zero precipitation chances and highs in the 60s and 70s during the second half of the week.

JMG

AVIATION. Widespread MVFR occurred at coastal terminals, with periods of IFR at KUKI for much of the day as an upper level low moves overhead. Modest instability and forcing associated with this feature will continue the slight chance of thundertorms in the vicinity of each of the main terminals through the course of the afternoon. A second round of steadier rain will move into the area overnight with the next frontal boundary, bringing low-end MVFR and perhaps IFR conditions to KCEC and KACV around 09z and KUKI around 12z. The potential for wind shear is present at KACV and more so at KCEC early Sunday morning with the next frontal system, however at this time the near surface southerly winds are forecast to be strong enough to leave WS out of the TAFS. The wind forecast should be monitored. There is also remaining uncertainty on the timing of the wind shift from a westerly direction in the 15Z-18Z period. CB/JW

MARINE. Winds have relaxed somewhat in the wake of a surface frontal boundary. However, slight strengthening will occur tonight into Sunday morning as a second surface wave approaches the Redwood Coast. Winds will then weaken out of the west- northwest during Sunday afternoon. The most notable wave group during the short term period will be a modest westerly swell moving through the waters tonight through Monday at around 6 feet at 9 seconds. A stronger northerly wind regime then appears likely over the coastal waters from mid to late next week as high pressure builds offshore.

CB/JMG

EKA WATCHES/WARNINGS/ADVISORIES. CA . Winter Storm Warning until 11 PM PDT Sunday for CAZ107-108.

NORTHWEST CALIFORNIA COASTAL WATERS . None.

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 mi30 min S 14 G 16 52°F 52°F5 ft1005.4 hPa51°F
ANVC1 - 9416841 - Arena Cove, CA 31 mi50 min S 1.9 G 7 52°F 50°F1006.7 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA36 mi24 minSSE 410.00 miOvercast51°F46°F83%1006.1 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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Last 24hrN6N8N7CalmCalmCalmCalmCalmCalmCalmCalmCalmSE3CalmSE5S10S6S7SE6SW4S7SE7S4SE4
1 day agoN6NE3SW3CalmCalmN4E3CalmCalmN3CalmNE5NE95NW9
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2 days agoN63NE3CalmCalmCalmCalmCalmCalmCalmNW3CalmCalmN3CalmCalm5----------N8
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Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
Click for Map
Sat -- 02:42 AM PDT     2.34 feet Low Tide
Sat -- 05:12 AM PDT     Moonset
Sat -- 06:53 AM PDT     Sunrise
Sat -- 08:20 AM PDT     5.44 feet High Tide
Sat -- 03:12 PM PDT     -0.40 feet Low Tide
Sat -- 03:48 PM PDT     Moonrise
Sat -- 07:42 PM PDT     Sunset
Sat -- 10:01 PM PDT     5.04 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.52.92.42.42.73.44.255.45.34.73.62.310-0.4-0.20.51.52.73.94.754.8

Tide / Current Tables for Point Cabrillo, California Current
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Point Cabrillo
Click for Map
Sat -- 12:18 AM PDT     -0.77 knots Max Ebb
Sat -- 03:43 AM PDT     0.00 knots Slack
Sat -- 05:12 AM PDT     Moonset
Sat -- 06:29 AM PDT     0.81 knots Max Flood
Sat -- 06:54 AM PDT     Sunrise
Sat -- 09:17 AM PDT     -0.00 knots Slack
Sat -- 12:27 PM PDT     -1.37 knots Max Ebb
Sat -- 03:48 PM PDT     Moonrise
Sat -- 04:17 PM PDT     0.00 knots Slack
Sat -- 07:20 PM PDT     1.19 knots Max Flood
Sat -- 07:42 PM PDT     Sunset
Sat -- 10:33 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.8-0.7-0.6-0.30.10.50.80.80.60.2-0.4-1-1.3-1.3-1.1-0.7-0.20.40.91.21.10.90.4-0.3

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 (23,6,7,8)
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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.