Kupreanof, AK Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Kupreanof, AK

June 19, 2024 10:51 PM AKDT (06:51 UTC) Change Location
Sunrise 3:47 AM   Sunset 10:10 PM
Moonrise 8:17 PM   Moonset 1:54 AM 
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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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PKZ035 Sumner Strait- 248 Pm Akdt Wed Jun 19 2024

Tonight - SW wind 15 kt diminishing to 10 kt late. Seas 3 ft.

Thu - SE wind 10 kt in the morning becoming light. Seas 2 ft or less.

Thu night - S wind 10 kt. Seas 2 ft or less.

Fri - SE wind 20 kt. Seas 4 ft.

Fri night - SE wind 20 kt. Gusts to 35 kt. Seas 4 ft. Rain.

Sat - NE wind 15 kt. Seas 3 ft.

Sun - SE wind 10 kt. Seas 2 ft or less.

Mon - S wind 10 kt. Seas 2 ft or less.

PKZ005
No data


7 Day Forecast for Marine Location Near Kupreanof, AK
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Area Discussion for - Juneau, AK
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FXAK67 PAJK 200630 CCA AFDAJK

Southeast Alaska Forecast Discussion...CORRECTED National Weather Service Juneau AK 1030 PM AKDT Wed Jun 19 2024

SHORT TERM
/Through Thursday night/...A weak weather front is making its way northeast this afternoon and will displace the surface ridge located just offshore the outer coast. As the ridge shifts east, cloud cover will increase and a chance of precipitation re-enters the forecast for Southeast Alaska by Thursday morning. Have only a slight chance of rain is the forecast for tomorrow, but PoPs increase to 30-50% by late Thursday night for locations north and west of Clarence Strait.
The coming cloud cover will not be the marine layer that we have seen these past few days, so any significant clearing of the skies tomorrow afternoon in maximum daytime heating is not likely. Not a very auspicious start to summer with the solstice occurring Thursday afternoon at 12:50pm.

Afternoon thunderstorms are once again prevalent over the interior, The Yukon, and British Columbia but are not threatening Southeast Alaska as of this afternoon. With a shift in the surface ridge to the east, more stable air over SEAK tomorrow will aide in inhibiting thunderstorm activity tomorrow, so the Tongass should remain safe from any wildfire starts. With that in mind, have been looking at red flag parameters for Skagway. There, it is windy enough and dry enough for a red flag warning, but at 68 degrees not warm enough yet.

With such a weak pressure gradient, forecast winds are once again quite light. The only meaningful wind action will be northern Lynn Canal and Skagway, as it was today. Biggest change to winds was to decrease wind speeds over the canal and Skagway by a full 10 kts when forecast small craft conditions did not materialize. No impactful winds or seas on the outside either.


LONG TERM
/Friday into next week/...The next round of rain and wind approach the panhandle Friday with the rain chances lasting into the weekend.

We'll be watching a low tracking east through the gulf towards Haida Gwaii. The associated front will swing north into the panhandle. This front will likely (greater than 80% chance) bring rain to the area, especially in the southern half. Farther north, confidence is a little lower, so stuck with PoPS around 50 to 70%.
This is due to low confidence in how far north the front, and organized precip, will go.

In addition to the incoming rain, wind speeds will be elevated along the front as well. For now, went with marine wind speeds up to 25 knots along the front in the gulf. Euro ENS and GFS ENS give greater than 60% chance for wind speeds greater than 20 knots along the front during this time.

As the front tracks through the inner channels, went with wind speeds around 15 to 20 knots. This was supported by the latest NBM, EURO ENS, GFS ENS, and EURO AIFS. Increased winds in Clarence Strait to up to 20 to 25 knots due to EFI tables highlighting the wind speeds in the southern inner channels.

After the frontal passage, 500mb ridge looks to build back up but surface features generally keep light, leftover rain in the area so for now, low PoPS and light winds linger.

AVIATION
The marine layer and associated cloud deck has pushed out of the inner channels but it is still along the out coast and impacting PASI CIGS. The rest of the forecast area is pretty clear with some cue developing along some of the islands. The marine layer will move back into the inner channel to be in the Icy Strait area down Chatham Strait, Fredrick Sound and then into Clarance Strait. The marine layer may reduce some CIGS and VSBY to be near IFR conditions, mainly along the coastal locations. Some high clouds from the approaching front will begin to move other area from the west and the marine layer will begin to break up/lift through Thursday.

AJK WATCHES/WARNINGS/ADVISORIES
PUBLIC...None.
MARINE...None.




Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
WGXA2 43 mi39 minENE 1.9G5.1 59°F 30.0151°F
LCNA2 - Lincoln Rock, AK 48 mi42 minNW 11G13 55°F 45°F


Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
PAPG PETERSBURG JAMES A JOHNSON,AK 15 sm55 minESE 0410 smClear55°F54°F94%30.07
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Wind History graph: APG
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Tide / Current for Castle Islands, Duncan Canal, Alaska
   
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Castle Islands
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Wed -- 01:53 AM AKDT     Moonset
Wed -- 04:00 AM AKDT     Sunrise
Wed -- 06:00 AM AKDT     0.09 feet Low Tide
Wed -- 12:47 PM AKDT     12.12 feet High Tide
Wed -- 05:51 PM AKDT     4.36 feet Low Tide
Wed -- 08:17 PM AKDT     Moonrise
Wed -- 09:48 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Castle Islands, Duncan Canal, Alaska, Tide feet
12
am
14.4
1
am
12.9
2
am
10.1
3
am
6.6
4
am
3.3
5
am
0.9
6
am
0.1
7
am
0.8
8
am
2.6
9
am
5.2
10
am
7.9
11
am
10.3
12
pm
11.7
1
pm
12.1
2
pm
11.1
3
pm
9
4
pm
6.7
5
pm
4.9
6
pm
4.4
7
pm
5.2
8
pm
7.1
9
pm
9.7
10
pm
12.3
11
pm
14.3


Tide / Current for Wrangell Narrows (off Petersburg), Alaska Current
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Wrangell Narrows (off Petersburg)
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Wed -- 01:51 AM AKDT     Moonset
Wed -- 03:36 AM AKDT     -3.52 knots Max Ebb
Wed -- 03:58 AM AKDT     Sunrise
Wed -- 06:41 AM AKDT     0.00 knots Slack
Wed -- 10:06 AM AKDT     3.19 knots Max Flood
Wed -- 01:09 PM AKDT     -0.00 knots Slack
Wed -- 04:12 PM AKDT     -2.30 knots Max Ebb
Wed -- 06:37 PM AKDT     0.01 knots Slack
Wed -- 08:18 PM AKDT     Moonrise
Wed -- 09:48 PM AKDT     Sunset
Wed -- 09:53 PM AKDT     2.96 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Wrangell Narrows (off Petersburg), Alaska Current, knots
12
am
-0.2
1
am
-1.7
2
am
-2.8
3
am
-3.4
4
am
-3.5
5
am
-2.8
6
am
-1.3
7
am
0.6
8
am
1.9
9
am
2.8
10
am
3.2
11
am
2.8
12
pm
1.6
1
pm
0.2
2
pm
-1
3
pm
-1.9
4
pm
-2.3
5
pm
-2.1
6
pm
-1
7
pm
0.7
8
pm
2
9
pm
2.7
10
pm
3
11
pm
2.5


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GEOS Local Image of Pacific Northwest   
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Sitka/Juneau,AK




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