Tuesday, February18, 2020
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Marine Weather and Tides
Chevak, AK

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 8:31AMSunset 5:55PM Tuesday February 18, 2020 9:16 AM AKST (18:16 UTC) Moonrise 5:53AMMoonset 11:05AM Illumination 25% Phase: Waning Crescent; Moon at 25 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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7 Day Forecast for Marine Location Near Chevak, AK
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location: 61.53, -165.6     debug


Area Discussion for -
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FXAK69 PAFG 181557 AFDAFG

Northern Alaska Forecast Discussion National Weather Service Fairbanks AK 657 AM AKST Tue Feb 18 2020

SYNOPSIS. Highlights include: A strong storm over Southwest Alaska will move north and weaken over Northwest Alaska on Wed. This storm is bringing snow to most of the area north and west of Tanana, with storm totals of 4 to 10 inches by Wed. This storm is also bringing strong winds and blowing snow to most of the West Coast and Western Arctic Coast today and tonight, with Blizzard conditions in the Bering Strait. This storm is also causing moderate chinook conditions across the Alaska Range with south winds 50 mph gusting to 70 mph today, and strong east winds in easterly drainage wind areas such as at Eagle and near Delta Junction. All of the above mentioned conditions will diminish on Wed as the storm weakens.

Aloft . A long wave trough over Western Alaska and the Bering Sea with a ridge over NW Canada and Eastern Alaska will progress slowly east so that the trough is over mainland AK by Fri. Strong southerly flow now over Northern Alaska will become weaker and SW on Wed and Thu. This is now causing moderate to heavy snow over Western Alaska with chinook conditions over the SE INterior. As flow turn SW the snow will taper off over Western Alaska, but spread light snow to the Eastern Interior.

Surface . A 968 mb low near Nunivak Island will move to the Yukon Delta as a 983 mb low by 3pm Tue, to near Kotzebue as a 990 mb low by 3pm Wed, then weaken slowly. An occluded front from this low to the Bering Strait to Kodiak will move to the Bering Strait to POint Hope to Umiat to Denali by 3pm Thu, to the Bering Strait to Deadhorse to Denali by 3am Wed, and then to Utqiagvik to Delta Junction by 3pm Wed. Strong winds and snow and blowing snow along the West Coast will taper off tonight and Wed. Heavy snow in the Western and Northern Interior will taper off on Wed. Snow will spread to the eastern Interior on Wed and Wed night. Snow and blowing snow will spread tot he Western Arctic Coast today and the Eastern Arctic Coast tonight and Wed.

A low south of Shemya will move to the southeast Bering Sea as a strong low on Wed, and to Bristol Bay by Wed night, then continue east. This will bring more snow to southwest Alaska on Wed night and Thu, and another round of weak to moderate chinook conditions to the SE Interior on Thu.

DISCUSSION. Models initialize well aloft at 00Z, and show similar solutions aloft through 3pm Thu. Precipitation fields show similar solutions through 3pm Wed on areal coverage and precip amounts, After that time, differ on location and amounts. We will use a blend of the NAM and GFS for Wed night and Thu.

At the surface at 06Z, models all verify 3-4 mb too weak on the low near Nunivak Island, and also verify a few mb too weak on the surface trough over the North Slope. Models verify well on other features. Expect the Nunivak Island low to remain a bit deeper than models indicate today. We will adjust winds up 2-3kt along the West Coast today to account for this, and also bump up winds 3-5 kt over channeled areas of the Southern Interior and Alaska Range. Models all indicate trough over North Slope deepening rapidly this morning, so expect this to be close to reality and winds there to be handled well.

Coastal Hazard Potential Days 3 and 4 . None.

AFG WATCHES/WARNINGS/ADVISORIES. Wind Chill Advisory for AKZ203-AKZ204.

High Wind Warning for AKZ226.

Winter Storm Warning for AKZ215-AKZ216-AKZ217.

Blizzard Warning for AKZ213.

Winter Weather Advisory for AKZ201-AKZ202-AKZ207-AKZ208-AKZ209- AKZ210-AKZ211-AKZ212-AKZ214-AKZ218-AKZ219.

Gale Warning for PKZ210-PKZ220-PKZ225.

Brisk Wind Advisory for PKZ200-PKZ215-PKZ230-PKZ235-PKZ240- PKZ245.

JB FEB 20


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Scammon Bay, AK22 mi21 minWSW 91.25 miLight Snow Fog/Mist25°F25°F100%981.6 hPa

Link to 5 minute data for PAVA

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Tide / Current Tables for Kokechik Bay, Cape Romanzof, Alaska
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Kokechik Bay
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Tue -- 03:23 AM AKST     -1.17 feet Low Tide
Tue -- 07:56 AM AKST     Moonrise
Tue -- 09:40 AM AKST     Sunrise
Tue -- 10:17 AM AKST     6.91 feet High Tide
Tue -- 01:04 PM AKST     Moonset
Tue -- 04:11 PM AKST     2.09 feet Low Tide
Tue -- 06:56 PM AKST     Sunset
Tue -- 09:48 PM AKST     5.72 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.91.2-0.2-1.1-1-01.63.456.36.96.764.93.72.62.12.3344.95.55.75.2

Tide / Current Tables for Cape Romanzof, Bering Sea, Alaska
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
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GEOS Local Image of Alaska    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 Bethel, AK
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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.