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Flood Warning

Flood Statement
National Weather Service Juneau AK
306 PM AKDT Thu Aug 13 2026

.Mendenhall Lake gauge levels, along with USGS imagery from Suicide
Basin and water levels within the basin, indicate that the release is
ending. The river has crested around 14.7` and will continue to drop
through the afternoon and evening. The crest will take time to work
down the river but places should start to see water recede in the
next hour. Flooding will continue through this evening until the
river falls out of flood stage late tonight.

AKZ325-140715-
/O.CON.PAJK.FA.W.0001.000000T0000Z-260814T1230Z/
/00000.0.GO.000000T0000Z.000000T0000Z.000000T0000Z.OO/
City and Borough of Juneau AK-
306 PM AKDT Thu Aug 13 2026

...FLOOD WARNING FOR A GLACIER-DAMMED LAKE OUTBURST REMAINS IN EFFECT
UNTIL 430 AM AKDT FRIDAY...

* WHAT...Flooding caused by a glacier-dammed lake outburst continues.

* WHERE...The Mendenhall Lake And River near the Mendenhall Glacier
  Recreation area, View Drive and below Back Loop bridge.

* WHEN...Until 430 AM AKDT Friday.

* IMPACTS...Flooding of the area around Mendenhall Lake and along the
  Mendenhall River is ongoing. Water levels will start to drop
  through this afternoon and evening while water temperatures in the
  lake and river will stay cold.

* ADDITIONAL DETAILS...
  - At 255 PM AKDT, gauge data reported a glacier-dammed lake
    outburst is ongoing. Flooding is ongoing near the Mendenhall Lake
    And River.
  - The outburst flood forecast is based on an estimated volume of
    water in the glacier dammed lake and an estimated release rate
    based on previous events. The extent of water drainage within the
    basin (partial or full) can vary widely between outburst flood
    events and is a major source of uncertainty in the forecast,
    particularly with regard to the peak flood stage.
  - For Mendenhall Lake :
    At 2:15 pm the stage was 14.6 feet, in Major Flood Stage. Water
    levels will go below major flood stage around 5:00pm Thursday.
    Water levels will go below minor flood stage around 9:00pm
    Thursday.

Impacts:
At 13.0 feet: The low section of road past 9374 View Dr will be
flooded with 2 ft of water. Water begins to flow through some
backyards of homes on the northside of View Dr and flood low lying
areas. A few locations on View Dr will see depths of 1 to 2 feet of
water in homes.

At 14.0 feet: The low section of road past 9374 View Dr will be
significantly flooded and impassable. Water will begin to flow over
the road from water flowing behind homes on the north side of View
Dr. More homes along View Dr will begin to see moderate to major
flooding. Locations on River Rd with low river banks will begin to
see water approach driveways.

At 15.0 feet: Major flooding of multiple homes along View Dr. Water
will begin to approach a few homes along River Rd with low river
banks with possible flooding of driveways and 1 to 2 feet of water in
backyards. Up to 1 foot of water covering Riverside Dr at Tournure St
and Mendenhall River School.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Stay tuned to further developments by listening to your local radio,
television, or NOAA Weather Radio for further information.

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

The cold water temperatures can increase the threat of hypothermia
and lower the time required to cause hypothermia.

&&

LAT...LON 5836 13462 5841 13460 5845 13460 5847 13456
      5846 13452 5844 13447 5843 13447 5840 13454
      5836 13459 5835 13460


$$

spencer.fielding

Heat Advisory

URGENT - WEATHER MESSAGE
National Weather Service Juneau AK
124 PM AKDT Thu Aug 13 2026

AKZ318-319-140530-
/O.CON.PAJK.HT.Y.0007.000000T0000Z-260815T0300Z/
Municipality of Skagway-Haines Borough and Klukwan-
Including the cities of White Pass, Haines, and Skagway
124 PM AKDT Thu Aug 13 2026

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM AKDT FRIDAY...

* WHAT...Temperatures in the lower 80s.

* WHERE...Haines Borough and Klukwan and Municipality of Skagway.

* WHEN...Until 7 PM AKDT Friday.

* IMPACTS...Individuals not accustomed to these unusually hot
  temperatures for this region may experience heat related illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, and check up on elderly and vulnerable
relatives and neighbors.

Close curtains during the daytime to reduce sun insulation into the
home and open windows at night to allow the home to cool off. Utilize
fans or community buildings with air conditioning.

Locations next to the ocean or glaciers will be cooler with a
stronger breeze in the afternoon.

&&

$$
URGENT - WEATHER MESSAGE
National Weather Service Juneau AK
124 PM AKDT Thu Aug 13 2026

AKZ321-325-140530-
/O.CON.PAJK.HT.Y.0007.000000T0000Z-260815T0300Z/
Eastern Chichagof Island-City and Borough of Juneau-
Including the cities of Tenakee Springs, Juneau, and Hoonah
124 PM AKDT Thu Aug 13 2026

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM AKDT FRIDAY...

* WHAT...Temperatures in the lower 80s expected.

* WHERE...City and Borough of Juneau and Eastern Chichagof Island.

* WHEN...Until 7 PM AKDT Friday.

* IMPACTS...Individuals not accustomed to these unusually hot
  temperatures for this region may experience heat related illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, and check up on elderly and vulnerable
relatives and neighbors.

Close curtains during the daytime to reduce sun insulation into the
home and open windows at night to allow the home to cool off. Utilize
fans or community buildings with air conditioning.

Locations next to the ocean or glaciers will be cooler with a
stronger breeze in the afternoon.

&&

$$
URGENT - WEATHER MESSAGE
National Weather Service Juneau AK
124 PM AKDT Thu Aug 13 2026

AKZ328-330>332-140530-
/O.CON.PAJK.HT.Y.0007.000000T0000Z-260815T0300Z/
Prince of Wales Island-Ketchikan Gateway Borough-City of Hyder-
Annette Island-
Including the cities of Craig, Thorne Bay, Coffman Cove, Hyder,
Klawock, Hydaburg, Metlakatla, and Ketchikan
124 PM AKDT Thu Aug 13 2026

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM AKDT FRIDAY...

* WHAT...Temperatures in the lower 80s expected.

* WHERE...Annette Island, City of Hyder, Ketchikan Gateway Borough,
  and Prince of Wales Island.

* WHEN...Until 7 PM AKDT Friday.

* IMPACTS...Individuals not accustomed to these unusually hot
  temperatures for this region may experience heat related illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, and check up on elderly and vulnerable
relatives and neighbors.

Close curtains during the daytime to reduce sun insulation into the
home and open windows at night to allow the home to cool off. Utilize
fans or community buildings with air conditioning.

Locations next to the ocean or glaciers will be cooler with a
stronger breeze in the afternoon.

&&

$$

daniel.slagle

Marine Weather Statement

Marine Weather Statement
National Weather Service Juneau AK
312 PM AKDT Thu Aug 13 2026

PKZ031-140800-
Stephens Passage-
312 PM AKDT Thu Aug 13 2026

...TREES AND OTHER DEBRIS LIKELY IN WATER...

The Mendenhall River continues to experience a glacier lake
outburst flood. As a result of the release, trees and other
debris have been observed on the Mendenhall River, and will
likely extend down into Stephens Passage, Fritz Cove, and Favorite
Channel through Friday morning. Caution is advised for mariners
and all recreational users on the water for hazards to their
vessels.

$$
U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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