Monday, July6, 2020
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Marine Weather and Tides
Sitka and, 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 4:00AMSunset 10:04PM Monday July 6, 2020 4:18 PM AKDT (00:18 UTC) Moonrise 10:23PMMoonset 4:41AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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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PKZ032 Northern Chatham Strait- 252 Pm Akdt Mon Jul 6 2020
Tonight..S wind 10 kt in the evening becoming light. Seas 2 ft or less.
Tue..Light winds becoming S 10 kt in the afternoon. Seas 2 ft or less.
Tue night..S wind 10 kt in the evening becoming light. Seas 2 ft or less.
Wed..W wind 10 kt. Seas 2 ft or less.
Wed night..Light winds. Seas 2 ft or less.
Thu..Light winds. Seas 2 ft or less.
Fri..Light winds. Seas 2 ft or less.
Sat..Light winds becoming S 10 kt. Seas 2 ft or less.


7 Day Forecast for Marine Location Near Sitka and , AK
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location: 57.04, -135.39     debug


Area Discussion for -
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FXAK67 PAJK 062259 AFDAJK

Southeast Alaska Forecast Discussion National Weather Service Juneau AK 259 PM AKDT Mon Jul 6 2020

SHORT TERM. /Monday evening through Wednesday evening./ One would think a quiet weather pattern is easy to forecast. Light winds, no major weather systems, and little forcing usually lead to a relatively nice summer day. However due to Southeast Alaska's steep terrain and proximity to the ocean, the forecast becomes quite complex in these types of scenarios. While the weather will remain quiet through Wednesday, small details within the forecast will be very hard to point out. Like trying to herd cats with the wind, trying to pin point where isolated showers will develop with little forcing is nearly impossible.

The short term begins with a weak area of low pressure near Kodiak Island slowly moving southeast through the Gulf. The low will makes its way towards Haida Gwaii by Wednesday afternoon. Ahead of the low, weak high pressure will reside over the Panhandle and then attempt to build back in Wednesday as the low departs. With the low being so far offshore and very weak, the pressure gradient and winds are expected to remain light. Not much change is expected to occur over the next few days. Soundings show abundant low and mid level moisture around due to the light onshore flow. Clouds are expected to stick around as features will not move around in such a stagnant weather pattern. Normally in onshore flow regimes, showers (sometimes widespread) develop along the steep terrain and south/west facing slopes. With flow being so weak, isolated showers are possible around SE AK; however even the best guidance does a poor job trying to pin point where showers may develop with such weak forcing. Have decided to keep 20-30% POPs for much of the region through Wednesday. Overall, not expecting a complete washout for the first half of the week, in fact most areas will be dry a good portion of the daytime hours. Brief showers are not expected to put down significant rainfall totals. With clouds sticking around, expecting temperatures to remain in the low to mid 60s.

A more substantial system comes into the picture late Wednesday night into Thursday. A system dropping SE into the NW Gulf will try to phase with a weak system over SW Yukon. This phased system will continue to drop southward into the central Gulf on Thursday. Model runs today have all come into pretty good agreement regarding the development of this mid week system. Decided to increase POPs late Wednesday night through early Thursday morning as southerly flow ahead of this system will pump in abundant gulf moisture into the Panhandle. Expect winds in the gulf to increase Wednesday night ahead of the low. Increased coastal water winds to 15 kt; however these will likely need to be raised in future forecast packages.

Overall forecast confidence is only marginal through Wednesday and around average towards Thursday.

LONG TERM. /Wednesday through Sunday as of 9 pm Sunday/ A general upper level trough persists over of the eastern half of the Gulf of Alaska and the panhandle through the end of the week, and an upper level ridge should continue over the Eastern Aleutians. A short wave will move across the gulf to be southwest of Haida Gwaii by Wednesday morning. An another upper trough will move over the western part of the state and then south through the central gulf to form a closed cut off low over the southeast gulf Friday night. That features seems to want to move to the northern British Columbia coast late Sunday.

This will lead to a broad area of low pressure over the gulf the later part of the week approaching the weekend. A more organized frontal feature will move towards the southern panhandle late Friday and Saturday. The track of the low is further west, so the rain near the developing feature should stay off shore until late Friday. For the later half of the week the panhandle will see isolated to scattered showers near the coast mountains just like earlier in the week. The position of the low when it is more developed and cut-off at the end of the week will have the flow suppressing any rain for the Northeast Gulf Coast and northern panhandle. A much better chance for rain will be found over the southern half of the panhandle for the weekend.

Only minor changes were needed in the mid and long range, one was to adjust a couple of the temperatures over the northern Lynn Canal area. PoP was also adjusted slightly in the Wednesday time frame using a blend of the SREF and GFS. WPC was used for the long range portion of the forecast.

AJK Watches/Warnings/Advisories. PUBLIC . None. MARINE . None.



CM/Bezenek

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SHXA2 2 mi27 min SSW 6 G 11 61°F 1017.3 hPa49°F
ITKA2 3 mi49 min 62°F 53°F1017.6 hPa
STXA2 5 mi27 min SSW 8 G 17 61°F 1017 hPa47°F
PGXA2 41 mi26 min ESE 4.1 G 8 58°F 52°F
46084 - Cape Edgecumbe Buoy AK 48 mi29 min W 3.9 G 3.9 55°F 55°F4 ft1018.4 hPa50°F
TKEA2 - Tenakee Springs, AK 52 mi27 min ESE 1.9 G 6 59°F 1014.6 hPa51°F
PLXA2 - 9451054 - Port Alexander, AK 67 mi49 min Calm G 4.1 67°F 1016.5 hPa
ELFA2 - 9452634 - Elfin Cove, AK 94 mi49 min 56°F 48°F1017.8 hPa

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sitka - Sitka Airport, AK3 mi26 minSW 69.00 miMostly Cloudy59°F51°F75%1017.1 hPa

Link to 5 minute data for PASI

Wind History from ASI (wind in knots)
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Last 24hrW3NW4NW3CalmCalmCalmNW3CalmCalmCalmN3CalmN3CalmNW3CalmNW4W5SW10SW7SW8SW8SW8SW6
1 day agoCalmNW7N3NW4SW7SW8S5N4NW5CalmNW3NW5CalmCalmNW4CalmNW5NW5NW6W6W6SW5CalmW3
2 days agoNW7NW5NW6NW8NW7W5NW5W6SW6SW5SW7SW5SW7SW7SW8SW10SW9SW7SW9SW6SW4SW7SW75

Tide / Current Tables for Dog Point, Lisianski Peninsula, Sitka Sound, Alaska
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Dog Point
Click for Map
Mon -- 01:36 AM AKDT     10.84 feet High Tide
Mon -- 04:16 AM AKDT     Sunrise
Mon -- 05:40 AM AKDT     Moonset
Mon -- 08:35 AM AKDT     -2.51 feet Low Tide
Mon -- 03:07 PM AKDT     8.81 feet High Tide
Mon -- 08:32 PM AKDT     2.85 feet Low Tide
Mon -- 09:55 PM AKDT     Sunset
Mon -- 11:23 PM AKDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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9.310.610.79.67.44.61.6-0.9-2.3-2.4-1.21.13.86.38.18.88.47.25.53.9333.95.7

Tide / Current Tables for Olga Point, Olga Strait, Sitka Sound, Alaska
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Olga Point
Click for Map
Mon -- 01:40 AM AKDT     10.74 feet High Tide
Mon -- 04:16 AM AKDT     Sunrise
Mon -- 05:40 AM AKDT     Moonset
Mon -- 08:49 AM AKDT     -2.51 feet Low Tide
Mon -- 03:11 PM AKDT     8.71 feet High Tide
Mon -- 08:46 PM AKDT     2.85 feet Low Tide
Mon -- 09:56 PM AKDT     Sunset
Mon -- 11:24 PM AKDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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910.410.79.77.74.92-0.5-2.1-2.5-1.50.63.35.97.98.78.47.35.74.23.12.93.65.3

Weather Map
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wmap_P
GEOS Local Image of PacificNorthwest    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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (20,4,5,8)
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Ground Weather Radar Station Biorka Is., AK
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Disclaimer:
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.