Thursday, April22, 2021
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Marine Weather and Tides
Kasaan, 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 8:53PM Thursday April 22, 2021 4:56 AM PDT (11:56 UTC) Moonrise 1:53PMMoonset 4:39AM Illumination 80% 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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PKZ036 Clarence Strait- 331 Am Akdt Thu Apr 22 2021
Today..NW wind 10 kt. Seas 2 ft or less.
Tonight..NW wind 10 kt. Seas 2 ft or less.
Fri..NW wind 10 kt. Seas 2 ft or less.
Fri night..NW wind 10 kt. Seas 2 ft or less.
Sat..NW wind 10 kt. Seas 2 ft or less.
Sun..E wind 10 kt becoming nw. Seas 2 ft or less.
Mon..S wind 10 kt. Seas building to 3 ft.


7 Day Forecast for Marine Location Near Kasaan, AK
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location: 55.25, -132.3     debug


Area Discussion for -
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FXAK67 PAJK 212241 AFDAJK

Southeast Alaska Forecast Discussion National Weather Service Juneau AK 241 PM AKDT Wed Apr 21 2021

SHORT TERM. Clear skies and no precipitation will continue for this short term forecast period. Daytime highs will trend a few degrees above normal for this time of the year, but still feel cool compared to last weekend and earlier this week. The clear skies will also allow for overnight lows to fall below freezing for most locations tonight, which is a few degrees below normal. Highs and lows will both trend gradually warmer through the short term period. High pressure over the Yukon will act in conjunction with an inverted trough oriented along the long axis of the Panhandle to maintain a moderate strength northerly pressure gradient. Small craft winds over Lynn Canal this afternoon will diminish overnight and remain in the 15 to 20 kt range through Thursday as the gradient relaxes slightly, but jump back up to 25 kts late Thursday night and much of Friday. Daytime sea breezes are not expected to fully develop in Haines or Skagway, but merely act to diminish the northwesterly/northeasterly wind speeds.

A significant marine layer is not expected to reform tonight. However, fog was included for Yakutat owing to the fact that the dewpoint did not fall there all day today and the forecast low will get well below the current dewpoint value. Elsewhere, afternoon dewpoint spreads are considered sufficient to preclude fog tonight. If anything, some frost may form.

Minimal changes were made to the previous forecast apart from cooling the overnight lows tonight under clear skies. Forecast confidence is above average.

LONG TERM. /Fri through Wed as of 10 pm Tue/ Much of the extended range period is dominated by a strong blocking upper ridge over interior Alaska that does not move all that much through the period. It is not until early next week that any signs of significant change shows up and that comes in the form of the ridge weakening and getting pushed W. The cause of this change is two strong upper lows (one moving W from the Canadian Arctic, and one moving E from the Southern Bering Sea) that will result in a general upper trough over the state by the middle of next week. Some uncertainty on timing and how the pattern change exactly plays out so confidence for early next week is low.

So what does that mean for the panhandle? For the most part it means dry and mostly clear weather continues through the weekend at least as offshore flow dominates. The main change to the forecast was for Fri through Sun with an increase in offshore winds across the northern inner channels. Surface pressure will be decreasing in the Gulf and southern panhandle starting on Fri while high pressure remains nearly steady in the Yukon. Pressure gradients along the coast mountains will increase (up to 2.5 to 3.5 mb forecast between Juneau and Skagway by Fri night and into Sat), and northerly winds should respond (winds increased to 15 to 25 kt for Lynn Canal, parts of Stephens Passage, and even Cross Sound at that time). Winds should start to diminish Sun as the Yukon high weakens, but timing on the diminishing trend is a little uncertain due to the uncertainty with the start of the upper level pattern change early next week.

Precip is expected to start to return to the forecast next week, but the timing of that is rather low confidence. This mainly stems from the uncertainty in the upper level pattern shift for early next week. Precip onset ranges from as early as Sun night to as late as Tue with ensemble means trending toward the later timing currently. They also differ on which direction it will be coming from (some suggest an easterly wave while others are trending toward a front from the S). We will continue to watch this develop.

AJK WATCHES/WARNINGS/ADVISORIES. PUBLIC . None. MARINE . Small Craft Advisory for PKZ012-013-031-033-043-051-052.



FCF/BFL/EAL

Visit us at http://www.weather.gov/Juneau


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SPXA2 26 mi28 min N 5.1 G 9.9 1020.5 hPa
GIXA2 26 mi22 min NE 1.9 G 7 46°F 1019.9 hPa35°F
KEXA2 33 mi32 min S 1.9 G 5.1 1020.3 hPa
SLXA2 35 mi29 min ENE 4.1 G 8 39°F 1019.4 hPa30°F
KECA2 - 9450460 - Ketchikan, AK 36 mi56 min Calm G 4.1 40°F 46°F1023 hPa (-0.3)
SXXA2 38 mi28 min ENE 1.9 G 6 40°F 1020.5 hPa32°F
CRGA2 47 mi32 min ENE 1 G 4.1 41°F 1023.4 hPa32°F
LCNA2 - Lincoln Rock, AK 60 mi46 min WSW 13 G 17 44°F 1022.5 hPa44°F

Wind History for Ketchikan, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hydaburg - Hydaburg Seaplane Base, AK27 mi60 minN 010.00 miFair36°F33°F89%1023.2 hPa

Link to 5 minute data for PAHY

Wind History from AHY (wind in knots)
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Last 24hrNW4--CalmNW8W8W9NW13--NW12NW10NW12--NW14NW16NW13NW11NW10NW5CalmN3Calm--CalmCalm
1 day agoW8NW5NW7NW7NW6NW6NW5NW7SW4NW10SW7NW10NW12SW6NW10NW13NW9NW6NW9NW8NW9NW8--W6
2 days agoCalmCalmCalmCalmCalmCalm--W3SW6--SW6SW3--SW6SW7--CalmCalmNW9NW5NW4NW3NW3Calm

Tide / Current Tables for Divide Head, Cholmondeley Sound, Alaska
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Divide Head
Click for Map
Thu -- 03:24 AM AKDT     5.26 feet Low Tide
Thu -- 04:39 AM AKDT     Moonset
Thu -- 05:27 AM AKDT     Sunrise
Thu -- 09:24 AM AKDT     12.25 feet High Tide
Thu -- 01:53 PM AKDT     Moonrise
Thu -- 03:56 PM AKDT     1.34 feet Low Tide
Thu -- 08:08 PM AKDT     Sunset
Thu -- 10:26 PM AKDT     12.93 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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9.37.66.15.35.46.489.711.312.212.110.98.86.23.71.91.32.14.16.79.411.612.812.7

Tide / Current Tables for Saltery Cove, Skowl Arm, Kasaan Bay, Alaska
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Saltery Cove
Click for Map
Thu -- 03:34 AM AKDT     5.26 feet Low Tide
Thu -- 04:40 AM AKDT     Moonset
Thu -- 05:27 AM AKDT     Sunrise
Thu -- 09:37 AM AKDT     12.45 feet High Tide
Thu -- 01:52 PM AKDT     Moonrise
Thu -- 04:06 PM AKDT     1.34 feet Low Tide
Thu -- 08:09 PM AKDT     Sunset
Thu -- 10:39 PM AKDT     13.13 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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9.786.45.45.36.27.79.511.212.212.411.49.46.84.22.21.31.93.76.3911.412.913.1

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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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