Tuesday, March20, 2018 L-36.com

Marine Weather and Tides
Emmonak, AK

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 7:54AMSunset 8:18PM Tuesday March 20, 2018 5:24 AM AKDT (13:24 UTC) Moonrise 8:22AMMoonset 11:55PM Illumination 14% Phase: Waxing Crescent; Moon at 4 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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PKZ200 Norton Sound- 437 Am Akdt Tue Mar 20 2018
Today..W winds 15 kt.
Tonight..NW winds 15 kt.
Wed..E winds 25 kt. Blowing snow. Vsby 1 nm or less.
Wed night..SE winds 20 kt. Freezing fog and blowing snow.
Thu..SE winds 20 kt. Blowing snow.
Thu night..SE winds 20 kt.
Fri..SE winds 15 kt.
Sat..SE winds 10 kt.
PKZ200 Norton Sound- 437 Am Akdt Tue Mar 20 2018
Today..W winds 15 kt.
Tonight..NW winds 15 kt.
Wed..E winds 25 kt. Blowing snow. Vsby 1 nm or less.
Wed night..SE winds 20 kt. Freezing fog and blowing snow.
Thu..SE winds 20 kt. Blowing snow.
Thu night..SE winds 20 kt.
Fri..SE winds 15 kt.
Sat..SE winds 10 kt.

7 Day Forecast for Marine Location Near Emmonak, AK
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location: 63.03, -164.47     debug

Area Discussion for -
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Fxak69 pafg 201313
northern alaska forecast discussion
national weather service fairbanks ak
513 am akdt Tue mar 20 2018

Models... Pretty disappointed with the models overdoing everything
with the system that moved through Monday. They are also changing
significantly from run to run on what will happen with the next
system that moves to the west coast Wednesday and Thursday.

Solutions do seem to have a handle on the high amplitude ridge
building over the bering sea today and moving east over mainland
alaska the remainder of the week. The most notable change from
yesterdays solutions is the lack of precipitation they are now
bringing to the seward peninsula and the western brooks range.

Will use mainly the NAM solution for precipitation probability
since the blend the last couple days was lacking with the last

Aloft... At 500 hpa... A low developing over the copper river basin
will dig southeast with a 522 dam closed center developing over
yakutat. Trough continue to lie east to west over the arctic with
a 515 dam low in the northern chukchi sea, and a 514 dam low 150
nm north of kuparuk. Ridge is rotating northeast over the central
bering sea this morning and will move to have the axis lie over
170w tonight as the ridge continues to build north and a high
over the siberian arctic merges with it near the dateline and 80n.

The ridge continues to build as the axis moves over 160w by
Wednesday evening. The low over yakutat moves south with the
trough axis sliding east over the yukon territory. A ridge axis
will develop on the western flank of the ridge extending from
norton sound west over the gulf of anadyr Thursday morning, and
will move to lie from point lay west over 70n by Thursday
afternoon. As the ridge rotates the lows over the arctic will
merge as a 516 dam low 150 nm north of demarcation point this
afternoon and will move northeast and dissipate as it moves over
banks island. A ridge axis will develop over the arctic behind the
low and rotate around the ridge over the coast Wednesday
afternoon, and move to lie over the upper yukon flats and extend
southeast across the yukon territory Thursday morning. A closed
551 dam high will develop over the upper kuskokwim river valley
Thursday afternoon and move over the middle koyukuk valley by
Friday morning as the ridge axis continues to rotate east. By
Friday afternoon the closed high will be just north of point
barrow at 546 dam. Several shortwaves will move up the western
flank of the ridge spreading precipitation north over st lawrence
island and the western capes Thursday and Friday. A strong
shortwave will develop over the western aleutians and move to lie
from a 495 dam low near the gulf of anadyr to st lawrence island
to the pribilof islands by Thursday evening. The shortwave will
stretch out as it moves into the ridge and will lie from the
western chukchi sea to bristol bay by Friday morning. At 850
hpa... -10c isotherm lies south of the forecast area, but as the
ridge aloft moves over the state it will move north of the lower
yukon delta, and the eastern bering sea, then work inland to lie
from point hope to kaltag to kodiak city by Wednesday afternoon.

As the ridge pushes warm air north on the western flank, it will
also pull some cooler air south over the central and eastern
interior and eastern arctic coast Wednesday. As the ridge
continueseast the cooler air will be pushed east and warmer air
will move over the remainder of the state with the zero isotherm
making a cameo appearance over the central part of the state
Thursday night and Friday.

Surface... A trough of low pressure over the arctic with a low near
point lay, and another near barter island will move east and
combine into a single 1033 mb low that will move east and
dissipate of banks island Thursday. High pressure is building east
over the arctic plains today and the pressure gradient will
tighten up over the eastern arctic coast this afternoon. An area
of low pressure will persist over the southeastern half of the
state as a 1019 mb low near huslia will move east across the
middle tanana valley this morning and merge with a 1005 mb low
near yakutat this evening. High pressure associated with a 1045 mb
center near cold bay will push north over southwest alaska and
the bering strait this afternoon and merge with high pressure that
is pushing south from a 1042 mb center in the siberian arctic. As
the high pressure merges, a 1041 mb center will develop over
selawik, and a 1040 mb center will develop over the arctic
plains, tonight. By Thursday morning high pressure will extend
southeast to the eastern arctic coast, then southwest to bristol
bay with a 1042 mb high over the upper yukon flats. Leeside
troughing starts developing Wednesday night north of the brooks
range. By Thursday night the riding over the arctic moves over the
beaufort sea extending south over the eastern interior, then
southwest to a 1019 mb high over kodiak island with a 1032 mb high
near old crow yt. A weather front will move north to the gulf of
anadyr and the bering strait tonight, then north across the
chukchi sea Wednesday. Strong south flow develops over the west
coast and adjacent marine areas and will persist through Friday. A
second weather front will move up the west coast Thursday night
and Friday.

Arctic coast and brooks range... Cloudy with light snow or flurries
today. Winds generally will be swinging around to west and
northwest today as the trough pulls out to the east and high
pressure builds over the arctic plains. Pressure gradient tightens
up around barter island, so expect some blowing snow to develop
and visibility to be reduced during the afternoon. Some clearing
overnight as the high pressure builds over the area. Sport npp-
viirs 24 hour microphysics shows quite a bit of stratus over the
area, and the low circulation is well defined north of kaktovik.

West coast and western interior... Things settling down this
morning as decaying low over norton sound moves inland. Still
expect some snow showers into the interior, mainly south of huslia
today. Snow showers tapering off late this evening with clearing.

Temperatures falling tonight, but as high pressure moves inland
and the ridge aloft moves over the interior warm air will surge
north Wednesday over the coastal areas gradually working inland as
the ridge moves east. Tight pressure gradient develops over the
coastal areas with strong south flow. Winds increasing during the
day Wednesday with potential gusts to 50 mph on st lawrence island
and the southern capes, gusts to 60 mph on the bering strait
coast, and the northern capes, and gusts to 70 mph at cape
lisburne Thursday morning. Winds start dimishing by late Thursday

Central and eastern interior... Mostly cloudy with snow showers
today into tonight before they taper off. Local accumulations up
to 2 inches. West winds 5 to 15 mph today becoming northwest
tonight. Clearing overnight tonight with temperatures falling and
much cooler Wednesday and Wednesday night. Expect lows Thursday
morning zero to 10 below for most of the area.

Coastal hazard potential days 3 and 4... None.

Extended forecast for days 4 to 7... Not much faith in the models
at this point in time, and there doesn't seem to be much reason to
trust them at this time. That being said, will be leaning heavily
on the wpc extended guidance which is based on the ensembles.

Expect high pressure over the northeastern corner of the state
with warming over the southwest and periods of precipitation that
may be mixed at times.

Afg watches warnings advisories
Brisk wind advisory for pkz210.

Sdb mar 18

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Emmonak, Emmonak Airport, AK18 mi28 minWNW 1710.00 miFair10°F7°F87%1037.7 hPa

Wind History from AEM (wind in knots)
Last 24hrS10S12S12S14S17S16SW18SW20SW19SW22
1 day agoS10S8S9S8S9S12S14S15S15S16S17S19S15S11S12S10S13SW14SW12SW13--S10S13S11
2 days agoNE18

Tide / Current Tables for Kawanak Pass entrance, Yukon River, Bering Sea, Alaska
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Kawanak Pass entrance
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Tue -- 12:25 AM AKDT     Moonset
Tue -- 05:45 AM AKDT     0.23 feet Low Tide
Tue -- 08:57 AM AKDT     Sunrise
Tue -- 10:22 AM AKDT     Moonrise
Tue -- 11:28 AM AKDT     1.70 feet High Tide
Tue -- 06:10 PM AKDT     0.34 feet Low Tide
Tue -- 09:14 PM AKDT     Sunset
Tue -- 11:33 PM AKDT     1.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Kwikluak Pass, Yukon River, Bering Sea, Alaska
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Kwikluak Pass
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Tue -- 12:25 AM AKDT     Moonset
Tue -- 05:56 AM AKDT     0.12 feet Low Tide
Tue -- 08:59 AM AKDT     Sunrise
Tue -- 10:25 AM AKDT     Moonrise
Tue -- 10:49 AM AKDT     1.36 feet High Tide
Tue -- 06:21 PM AKDT     0.17 feet Low Tide
Tue -- 09:15 PM AKDT     Sunset
Tue -- 10:54 PM AKDT     1.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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GOES 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.
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Ground Weather Radar Station Nome, 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 numerious 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.