Thursday, April22, 2021
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Marine Weather and Tides
Port Graham, AK

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:12AMSunset 9:43PM Thursday April 22, 2021 7:19 AM AKDT (15:19 UTC) Moonrise 1:00PMMoonset 4:15AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 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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PKZ141 Kachemak Bay- 318 Am Akdt Thu Apr 22 2021
Today..Variable wind less than 10 kt. Seas 2 ft. Rain.
Tonight..Variable wind less than 10 kt. Seas 2 ft.
Fri..SW wind 10 kt. Seas 2 ft.
Fri night..Variable wind less than 10 kt. Seas 2 ft.
Sat through Sun..Variable wind 10 kt. Seas 2 ft.
Mon..SW wind 10 kt. Seas 2 ft.


7 Day Forecast for Marine Location Near Port Graham, AK
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location: 59.22, -151.73     debug


Area Discussion for -
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FXAK68 PAFC 221239 AFDAFC

Southcentral and Southwest Alaska Forecast Discussion National Weather Service Anchorage AK 439 AM AKDT Thu Apr 22 2021

ANALYSIS AND UPPER LEVELS.

Strong high pressure remains over the Interior, with upper level ridging extending across the Gulf and into the North Pacific. Meanwhile, multiple lows, troughs, and fronts move across the Bering over the next couple days. The AKPen, Aleutians, and Kodiak Island will see the most active weather as the strong high pressure blocking pattern keeps any frontal systems from pushing across the Mainland.

MODEL DISCUSSION.

Models are in good overall synoptic agreement. There are a few discrepancies regarding the low center(s) within the system just south of the Aleutians today. The models are handling a second North Pacific low approaching the Aleutians this weekend quite well. Overall strength, track, and timing seem to be in alignment across the models, with the fairly significant differences in center location. The NAM is much further north and west than the remaining models, even crossing into the Bering while the rest stay south of the Chain. The GFS enters the Bering shortly after, still tracking south of the NAM however, while the Canadian/EC solutions stay south of the Chain through the weekend.

AVIATION.

PANC . VFR conditions and light winds will persist.

SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2).

It is a very similar pattern today as was the case yesterday over Southcentral. The front is over Kodiak Islands and extends southeast from there through the Gulf of Alaska. This front is having a difficult time moving any farther north due to the strong ridge over the Interior of the state. The rain is stalling out over Kachemak Bay early this morning and may just nudge a little farther northward today before the ridge builds back over Southcentral tomorrow and brings sunshine to all of Southcentral.

Kodiak will see continued heavy rain at times today with the front stalled over them. Kodiak Airport set a record yesterday for daily rainfall at 1.49 inches. The rain should lessen in intensity this evening and then finally move completely out of the area Friday night.

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 through 3: Today through Saturday) .

A relatively quiet, drier weather will persist as a result of a persistent high pressure over the State. Subsidence dry air and warm mid-level temperatures over Southwest Alaska will reduce the potential for rain activity across Y-K Delta and the lower Kuskokwim Valley. Meanwhile, tropical moisture combined with east- northeast flow over Bristol Bay and AKPEN will increase the potential for rain showers there today and tonight before conditions begin improving Friday morning.

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 through 3: Today through Saturday) .

A fixed North Pacific low remains to be the driving weather mechanism for the Aleutians and part of the Bering Sea until it tapers off early Friday morning. Elevated seas and winds along the central Aleutians will gradually diminish tonight reflecting the weakening low until the next North Pacific low reaches the central Aleutians Friday afternoon. The next system will bring gale conditions and elevated seas and swells through the weekend, with more widespread rain passing through central and eastern Aleutians and Pribilof Islands in the next couple days.

MARINE (Days 3 through 5/Saturday through Monday).

A North Pacific low tracks over the Southern Bering through Sun before crossing back into the North Pacific by Mon. How far north it will track and its development of this storm are uncertain. Small craft winds are likely to wrap the low through Mon, with local gale force winds over the Eastern Aleutians, particularly near channeled terrain on Sat.

Generally light winds over the Gulf through mid-day Sun when high pressure brings gusty westerly winds less than small craft over the Northern Gulf late Sun into Mon.

LONG TERM FORECAST (Days 4 through 7/Sunday through Wednesday).

A blocking ridge that is the dominant feature over most of the mainland will attempt to be pushed towards the Bering late this weekend and towards the early part of next week. The latest deterministic and ensemble guidance is indicating that a strong polar low will work south across Canada, shoving the high pressure bubble to the west as it weakens. The global forcing responsible for much of our abnormal weather (MJO) is weakening and that will start to trend the area back to normal weather for late April. The Anchorage Bowl should still see 'mild' afternoons in the mid 50s, while inland areas in the MatSu will soar into the 60s. Monday through Wednesday will see daytime highs slowly drop from the mid 50s to upper 40s. As for any rain chances? It's panning out to be dry through next week for all areas along the coast and inland.

AFC WATCHES/WARNINGS/ADVISORIES. PUBLIC . Flood Warning 121 (Anchor River) MARINE . Gale Warning 131 FIRE WEATHER . NONE.



SYNOPSIS AND MODEL DISCUSSION . KM SOUTHCENTRAL ALASKA . EZ SOUTHWEST ALASKA/BERING SEA/ALEUTIANS . CB MARINE/LONG TERM . MK/SS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OVIA2 - 9455500 - Seldovia, AK 15 mi79 min 41°F1020.2 hPa (-1.7)
FILA2 - Flat Island Light, AK 16 mi79 min NNE 1.9 G 1.9 40°F 1020.5 hPa (-1.4)39°F
AMAA2 - East Amatuli Light, AK 24 mi79 min NE 26 G 30 40°F 1019.6 hPa (-1.7)40°F
46108 - Central Cook Inlet - 175 27 mi79 min 41°F1 ft
HMRA2 - Kachemak Bay Reserve, AK 31 mi109 min NNW 1.9 1020 hPa
HMSA2 31 mi57 min E 1 G 2.9 44°F 37°F
APXA2 39 mi94 min ESE 4.1 37°F 1021 hPa31°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seldovia, Seldovia Airport, AK15 mi26 minN 010.00 miOvercast37°F37°F100%1020.1 hPa

Link to 5 minute data for PASO

Wind History from ASO (wind in knots)
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Last 24hrCalmS4CalmN54N4CalmCalmCalmNE4NE3S6S8S6S5CalmCalmS4CalmCalmCalmCalmCalmCalm
1 day ago54SW3CalmNE4553Calm4N4N5N5CalmCalmCalmCalmS3CalmCalmCalmCalmCalmCalm
2 days agoN7N7N12S36
G16
S7N553S8E7S7S8S6S4S5S6S5Calm3SE6S66S7

Tide / Current Tables for Port Chatham, Alaska
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Port Chatham
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Thu -- 05:00 AM AKDT     5.86 feet Low Tide
Thu -- 06:15 AM AKDT     Moonset
Thu -- 06:31 AM AKDT     Sunrise
Thu -- 10:57 AM AKDT     10.79 feet High Tide
Thu -- 02:59 PM AKDT     Moonrise
Thu -- 05:25 PM AKDT     1.95 feet Low Tide
Thu -- 09:40 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.59.88.67.36.25.96.278.29.510.410.810.397.153.12.12.13.25.17.39.611.2

Tide / Current Tables for Port Graham, Alaska
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Port Graham
Click for Map
Thu -- 05:19 AM AKDT     6.37 feet Low Tide
Thu -- 06:16 AM AKDT     Moonset
Thu -- 06:31 AM AKDT     Sunrise
Thu -- 11:17 AM AKDT     12.83 feet High Tide
Thu -- 02:59 PM AKDT     Moonrise
Thu -- 05:45 PM AKDT     2.12 feet Low Tide
Thu -- 09:41 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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12.611.910.58.87.26.46.67.58.910.61212.812.611.39.26.74.22.52.23.15.17.710.612.9

Weather Map
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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