Sunday, July5, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Attu Station, 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 5:57AMSunset 6:53PM Monday July 6, 2020 12:23 PM ChST (02:23 UTC) Moonrise 8:54PMMoonset 3:37AM Illumination 100% Phase: Full Moon; Moon at 15 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
    EDIT      (on/off)   Help
PKZ176 SEguam Island To Adak Pacific Side- 343 Pm Akdt Sun Jul 5 2020
Tonight..Variable wind 10 kt. Seas 6 ft. Patchy fog.
Mon..SE wind 15 kt. Seas 5 ft. Patchy fog.
Mon night..SE wind 15 kt. Seas 5 ft. Patchy fog.
Tue..E wind 20 kt. Seas 5 ft.
Tue night..SE wind 15 kt. Seas 5 ft.
Wed through Fri..NE wind 15 kt. Seas 8 ft.


7 Day Forecast for Marine Location Near Attu Station, AK
   Hourly   EDIT   Help
location: 52.84, 173.2     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXAK68 PAFC 060039 AFDAFC

Southcentral and Southwest Alaska Forecast Discussion National Weather Service Anchorage AK 439 PM AKDT Sun Jul 5 2020

ANALYSIS AND UPPER LEVELS. In the upper levels, a high amplitude short-wave ridge is centered from south of Kodiak Island northwestward across Southwest Alaska and up to the Chukchi Sea. A warm front oriented northwest to southeast along the leading edge of the ridge is tracking northeastward across Southwest Alaska and the western Gulf and toward Cook Inlet and the Kenai Peninsula. This is producing areas of light rain, low clouds, and fog.

East of the upper ridge, a potent short-wave which tracked southward into the Copper River Basin overnight (and produced widespread thunderstorms along the Denali Highway corridor) is quickly exiting to the southeast. However, additional weaker short-waves moving down from the north continue to trigger isolated to scattered convection. Meanwhile, low clouds and patchy fog have settled in along the Gulf coast. Clouds are also on the increase across the remainder of Southcentral ahead of the approaching warm front. All of this cloud cover will limit heating today, leading to cooler high temperatures area-wide compared to the last several days.

To the west of the upper ridge, a short-wave trough is tracking eastward across the eastern Bering Sea, eastern Aleutians, and southern Alaska Peninsula. There appears to be very little rain with this trough, however do expect it to interact with the aforementioned warm front later tonight. There is ridging behind the short-wave along the Aleutian chain. Satellite imagery shows a typical summer day across the Bering Sea and Aleutians, with a near continuous blanket of overcast skies.

MODEL DISCUSSION. Models are in fair agreement with handling of large scale features through around Monday night, then solutions begin to diverge. The root of these differences seems to be how fast the upper level ridge breaks down over Alaska as troughs push into it from multiple directions.

One key feature is a deep cut-off low which tracks from the Northwest Territory in Canada southwestward toward Alaska. The NAM and Canadian are most aggressive in backing this low into the Copper River Basin on Tuesday, which would aid in convective initiation. The ECMWF has trended this direction while the GFS has been consistent in keeping this low farther east over the Yukon with little or no impact on Southcentral. Will keep a close eye on this as it could affect weather across much of Southcentral Tuesday through Wednesday.

AVIATION. PANC . Persistent low level southerly flow up Cook Inlet will advect lower clouds into the Anchorage area overnight. While there is some question in timing, feel confident ceilings will drop to MVFR. Some guidance indicates potential for IFR ceilings. There are some lower clouds sitting on the west side of Cook Inlet today, so can't rule it out completely. Once lower ceilings are in place, expect these conditions to hold in place until sometime Monday afternoon when low level flow then shifts around to the north.

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 through 3:Tonight through Wednesday) .

A few thunderstorms have developed just east of the Talkeetna mountains this afternoon. This is likely the result of differential heating and perhaps some locally enhanced surface convergence along a remnant outflow boundary, left over from the complex of early morning thunderstorms that tracked from the Denali Highway (near the Maclaren River to the Eureka/Glennallen) area this morning. This has helped compensate for subsidence behind the departing wave that helped foster the early morning storms. With 0-6km bulk shear values still hovering in the 25 to 30 knot range, any showers or thunderstorms will move southeast at a fairly good clip. Thus, we increased the mention of this down to the Glenn Hwy through this evening.

Otherwise, look for increased cloud cover with cooler conditions to develop for Monday, especially for the Kenai Peninsula and the Anchorage Bowl. This is due to a warm front that'll gradually nudge northward tonight, perhaps reaching the Sterling Hwy, before frontolysis (the weakening of a front) commences as the parent trough slides southeastward into the Gulf. This places most of Southcentral between the building Bering Sea ridge, and a fairly stout upper low that'll move into the Yukon for Monday evening through Wednesday.

Periodic disturbances rounding the top of the ridge or on the backside of the upper low, combined with daytime heating and resultant instability, will allow for additional shower and thunderstorm development across the northern Susitna Valley and Copper Basin for Monday. This will expand southward for Tuesday and Wednesday afternoon to include more of the Susitna Valley, and perhaps areas along or just west of the Chugach Mountains across the Anchorage Bowl and Kenai Peninsula.

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 through 3:Sunday through Tuesday) .

Expecting a pattern change back to cool and cloudy weather after a skinny ridge over western Alaska brought warmer temperatures over the holiday weekend. The last chance for thunderstorms will be this afternoon and evening with some mild instability building over the central Kuskokwim Valley and western Alaska Range throughout the day today. By Monday morning a series of shortwaves will begin to break down the ridge as a zonal jet stream expands eastward from Siberia throughout the week. This will push stable, maritime air over most of Southwest for the days to come with patchy fog expected along most of the coastline. By Monday night the chances of rainfall are highest over the inland, eastern areas and high terrain with the next shortwave expected to bring light rain to the Y-K Delta and coastal areas throughout the day on Tuesday. Low stratus and cool temperatures are likely over Southwest throughout the forecast period.

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

The pattern is expected to stay fairly stagnant through Tuesday with a trough over the northern Bering/western Russia and building north Pacific Ridge over the Aleutian Chain. At the surface, high pressure will persist with the center just to the south of Dutch Harbor. This pattern will bring low stratus and patchy fog to the forecast area through Tuesday. Light rain is expected over the northern and Central Bering through Tuesday, with an upper level shortwave bringing some moderate rain to the central Aleutians by the end of the forecast period. Winds are expected to remain light with the exception of small craft advisory winds in Bristol Bay and to the south of the Akpen through the terrain gaps on Monday.

MARINE (Days 3 through 5: Wednesday through Friday).

Models are in good agreement starting Wednesday afternoon with weak low pressure over the Gulf. However, there is less confidence in how strong the winds will be in the western Gulf to the Alaska Peninsula and whether this low pressure system will track back into the North Pacific or stay relatively stationary and weaken through Thursday evening. In any case, winds would remain low-end small craft advisory (GFS solution) or below over the Gulf during this time.

High pressure over the Bering will keep a relatively quiet pattern across this region. Some models are hinting at a weak low pressure system approaching the western and central Aleutians Friday from the North Pacific, but there is less certainty as to whether the associated front will move into the forecast area.

LONG TERM FORECAST (Days 3 through 7: Thursday through Sunday).

Cloudy conditions are expected over Southcentral later in the week as upper level waves continue to move into the region. As usually expected in this pattern, models are having a difficult time with placement and timing of these waves through early Saturday morning. To the west, cloud cover and chances for rain showers will stay in the forecast as a front tries to move into the area, which will move eastward through Sunday. By Saturday afternoon, models are struggling on the overall upper level pattern of whether the upper level trough will stay over northern Alaska or if it will drop down over Southwest Alaska.

AFC WATCHES/WARNINGS/ADVISORIES. PUBLIC . NONE. MARINE . NONE. FIRE WEATHER . NONE.

SYNOPSIS AND MODEL DISCUSSION . SEB SOUTHCENTRAL ALASKA . PD SOUTHWEST ALASKA/BERING SEA/ALEUTIANS . CJ MARINE/LONG TERM . AH


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
Click EDIT to select an airport
Tide / Current Tables for Massacre Bay, Attu Island, Alaska
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Massacre Bay
Click for Map
Sun -- 12:07 AM HDT     Moonrise
Sun -- 04:16 AM HDT     3.81 feet High Tide
Sun -- 07:11 AM HDT     Sunrise
Sun -- 07:36 AM HDT     Moonset
Sun -- 01:09 PM HDT     -1.23 feet Low Tide
Sun -- 10:11 PM HDT     3.33 feet High Tide
Sun -- 11:52 PM HDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
3.33.43.53.73.83.83.532.21.30.4-0.4-1-1.2-1.1-0.60.10.91.72.433.23.33.3

Tide / Current Tables for Chichagof Harbor, Attu Island, Alaska
   EDIT      (on/off)   Help   One Week of Data
Chichagof Harbor
Click for Map
Sun -- 12:07 AM HDT     Moonrise
Sun -- 04:28 AM HDT     4.16 feet High Tide
Sun -- 07:10 AM HDT     Sunrise
Sun -- 07:35 AM HDT     Moonset
Sun -- 01:25 PM HDT     -1.35 feet Low Tide
Sun -- 10:24 PM HDT     3.63 feet High Tide
Sun -- 11:53 PM HDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
3.63.63.844.14.13.93.42.61.70.7-0.3-0.9-1.3-1.3-0.9-0.10.81.72.53.13.53.63.6

Weather Map
       (on/off)   Help Weather Map
wmap_A
GEOS Local Image of Puerto Rico    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (22,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Anderson AFB, Guam
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
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.