Wednesday, November25, 2020
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Marine Weather and Tides
Scotia, 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 7:14AMSunset 4:53PM Wednesday November 25, 2020 2:28 AM PST (10:28 UTC) Moonrise 2:56PMMoonset 2:38AM Illumination 76% Phase: Waxing Gibbous; Moon at 10 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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PZZ410 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 831 Pm Pst Tue Nov 24 2020
Synopsis for northern california waters..Northwesterly winds and short-period seas will rapidly increase for brief time later this evening and overnight with the passage of a cold front. A large long-period northwest swell will build tonight through tomorrow, and peak to around 18 to 20 feet by tomorrow evening. Large northwest seas are expected to persist through the day on Thursday as northerly winds increase.


7 Day Forecast for Marine Location Near Scotia, CA
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location: 40.25, -124.37     debug


Area Discussion for - Eureka, CA
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FXUS66 KEKA 242223 AFDEKA

AREA FORECAST DISCUSSION National Weather Service Eureka CA 223 PM PST Tue Nov 24 2020

SYNOPSIS. A weak frontal boundary will move across the region tonight. Light rain will occur with the frontal passage followed by post frontal showers during Wednesday. Otherwise, seasonably cool temperatures are expected during the second half of the week, with valley fog and frost occurring during the morning hours and dry conditions expected during the afternoon hours.

DISCUSSION. Satellite imagery showed a cold front approaching the Redwood Coast from the northwest during Tuesday afternoon. That front will aid in light rainfall entering Del Norte County early this evening, followed by Humboldt County between 7 and 10 PM, and then Trinity and Mendocino Counties early Wednesday morning. A modestly convective boundary layer is then forecast to gradually develop across northwest CA during Wednesday, which will promote post-frontal showers . particularly over Humboldt and Del Norte Counties. Thereafter, model guidance shows upper heights rising Wednesday night . skies will rapidly clear as a result and promote strong radiational cooling, with fog-free valleys and coastal areas likely experiencing frost. Otherwise, upper ridging is forecast to continue into the weekend. Dry weather will be probable as a result. After the weekend, model spread becomes very large early next week resulting in low forecast confidence.

Garner

AVIATION. A pesky patch of stratus and fog has been lingering near the Humboldt county shoreline and meandering about near KACV this afternoon. Intermittent IFR will be possible for the remainder of this afternoon before an incoming front disrupts and mixes out the shallow fog. Conditions will generally deteriorate across the entire area later this evening and overnight as a cold front generates a period of light to moderate rain and gusty NW winds. The rain will wind down for coastal terminals shortly after midnight, however shallow moisture will likely result in occasional IFR after the rain ends. Cooler air and onshore flow will be favorable for some showers and occasional MVFR conditions on Wednesday. Low level moisture will push over the coastal range into UKI later tonight. MVFR ceilings are expected at KUKI. Northwesterly winds of 20-30kt 1000 TO 2000 feet above ground level will increase the potential for low level wind shear for a brief period from 06Z-10Z at all terminals, perhaps til 14Z over KUKI.

MARINE. A long period WNW swell will build tonight. NOMAD buoys in the Gulf of AK have been reporting seas near 35 ft at 17 seconds. This was in good agreement with the ENP forecast which may be a couple of feet too low. The swell is expected to peak to around 18 to 20 feet by Wednesday afternoon and evening, though significant swell heights and periods will be sufficient to warrant advisories for surf well before then. Large long period waves will pose a risk to mariners and beachgoers, with an increased threat for shoaling and large breaking waves at the beaches and in harbor entrances.

Also, a brief surge of NW wind is expected tonight with the passage of a fast moving cold front. Winds may gust to 30 kt briefly, mainly in the outer waters and south of Cape Mendo. Northwesterly winds will predominate on Wednesday as another trough approaches from the NW. Northerly winds and steep waves are expected to build on Thu. The combination of the large NW swell and steep northerly waves may be sufficient to warrant a warning for hazardous seas, mainly south of Cape Mendo outside 10nm.

FIRE WEATHER. An elevated fire weather threat will exist across portions of Lake County Thursday and Thursday night as north to northeast winds gust from 20 to 40 mph and humidity values fall into the 20 to 40 percent range.

BEACH HAZARDS. Wave guidance continues to show a large long- period northwesterly swell moving through the waters from late tonight into Thursday morning. Hazardous surf conditions with breaking waves from 20 to 25 feet are expected along northwest facing beaches. Reference the High Surf Advisory for additional information. /SEC&ZVS

EKA WATCHES/WARNINGS/ADVISORIES. CA . High Surf Advisory from 10 PM this evening to 8 AM PST Thursday for CAZ101-103-104-109.

NORTHWEST CALIFORNIA COASTAL WATERS . Small Craft Advisory from 10 PM this evening to 10 AM PST Wednesday for PZZ450-455.

Hazardous Seas Warning from 10 AM Wednesday to 2 AM PST Thursday for PZZ450-455.

Small Craft Advisory until 6 AM PST Wednesday for PZZ470-475.

Hazardous Seas Warning from 6 AM Wednesday to 2 AM PST Thursday for PZZ470-475.



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
46213 - Cape Mendocino, CA (094) 19 mi32 min 52°F9 ft
HBYC1 - 9418767 - North Spit, CA 37 mi52 min 51°F1022.9 hPa
NJLC1 37 mi64 min SE 3.9 G 5.8 48°F
46244 - Humboldt Bay, North Spit, CA 45 mi32 min 52°F9 ft

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KFOT

Wind History from FOT (wind in knots)
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Last 24hrS4W7NW7W9W12NW8W6W5W6CalmCalmNW5CalmCalmCalmNW6W4CalmE5CalmCalmSE6E6SE5
1 day agoCalmS6CalmCalmCalmS4SE5CalmCalmCalmS5SE4CalmCalmCalmCalmCalmCalmCalmSE5SE6SE6----
2 days agoSE8S5CalmNW6NW7NW9NW7W5SE4SE7SE9SE10SE11SE7CalmSE6SE7SE7SE5SE6SE6SE7S7SE7

Tide / Current Tables for Cape Mendocino, California
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Cape Mendocino
Click for Map
Wed -- 01:32 AM PST     1.23 feet Low Tide
Wed -- 02:39 AM PST     Moonset
Wed -- 07:15 AM PST     Sunrise
Wed -- 07:56 AM PST     5.52 feet High Tide
Wed -- 02:45 PM PST     1.11 feet Low Tide
Wed -- 02:55 PM PST     Moonrise
Wed -- 04:53 PM PST     Sunset
Wed -- 08:26 PM PST     4.22 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.31.31.72.63.64.55.35.55.34.63.62.61.71.21.11.52.233.74.24.23.83.1

Tide / Current Tables for Punta Gorda, California Current
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Punta Gorda
Click for Map
Wed -- 02:17 AM PST     0.00 knots Slack
Wed -- 02:38 AM PST     Moonset
Wed -- 05:26 AM PST     0.88 knots Max Flood
Wed -- 07:15 AM PST     Sunrise
Wed -- 08:18 AM PST     -0.00 knots Slack
Wed -- 11:25 AM PST     -0.95 knots Max Ebb
Wed -- 02:55 PM PST     Moonrise
Wed -- 03:07 PM PST     0.00 knots Slack
Wed -- 04:53 PM PST     Sunset
Wed -- 06:05 PM PST     0.78 knots Max Flood
Wed -- 08:48 PM PST     -0.00 knots Slack
Wed -- 11:30 PM PST     -0.76 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.5-0.10.30.70.90.80.60.2-0.4-0.8-0.9-0.9-0.8-0.5-0.10.40.70.80.70.4-0.1-0.5-0.7

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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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.