448
WGAK87 PAJK 122048
FLSAJK
FLOOD STATEMENT
NATIONAL WEATHER SERVICE JUNEAU AK
1248 PM AKDT TUE AUG 12 2025
.USGS LASER GAUGE DATA FROM SUICIDE BASIN INDICATES A RELEASE FROM
THE BASIN HAS STARTED. MENDENHALL LAKE LEVELS ARE ALSO SHOWING A
RELEASE HAS STARTED. A CREST IS EXPECTED AROUND WEDNESDAY AFTERNOON
NEAR RECORD LEVELS OF SOMEWHERE BETWEEN 16.3 AND 16.8FT.
AKZ325-130500-
/O.CON.PAJK.FA.W.0002.000000T0000Z-250814T1600Z/
/00000.0.GO.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CITY AND BOROUGH OF JUNEAU AK-
1248 PM AKDT TUE AUG 12 2025
...FLOOD WARNING FOR A GLACIER-DAMMED LAKE OUTBURST REMAINS IN
EFFECT UNTIL 8 AM AKDT THURSDAY...
* WHAT...FLOODING CAUSED BY A GLACIER-DAMMED LAKE OUTBURST CONTINUES.
* WHERE...THE MENDENHALL LAKE AND RIVER NEAR AREAS AROUND THE
GLACIER VISITOR CENTER, THE MENDENHALL CAMPGROUND, SKATERS CABIN
ROAD, VIEW DRIVE AND POSSIBLY BELOW BACK LOOP BRIDGE.
* WHEN...UNTIL 800 AM AKDT THURSDAY.
* IMPACTS...FLOODING OF RIVERS, CREEKS, STREAMS, OTHER LOW-LYING
AREAS AND FLOOD-PRONE LOCATIONS IS IMMINENT OR OCCURRING.
* ADDITIONAL DETAILS...
- AT 1246 PM AKDT, GAUGE REPORTS INDICATED A GLACIER-DAMMED
LAKE OUTBURST ACROSS THE WARNED AREA. FLOODING IS ONGOING OR
EXPECTED TO BEGIN SHORTLY, ESPECIALLY 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 12:30PM THE STAGE WAS 10.0 FEET.
FLOOD STAGE IS 9.0 FEET.
FORECAST: A CREST AROUND 16.6 FEET IS EXPECTED AROUND
WEDNESDAY AFTERNOON.
WATER LEVELS WILL GO ABOVE 12 FEET AROUND EARLY WEDNESDAY.
WATER LEVELS WILL GO ABOVE MAJOR FLOOD STAGE AROUND WEDNESDAY
MORNING.
IMPACTS:
AT 9.5 FEET: WATER LEVELS UP TO 0.5 FEET WILL COVER SKATERS
CABIN ROAD BETWEEN SKATERS CABIN AND WEST GLACIER TRAILHEAD.
CAMPSITE 7 WILL BE FLOODED WITH WATER STARTING TO FLOW OVER
THE ROAD BETWEEN CAMPSITES 8 AND 9 IN THE MENDENHALL
CAMPGROUND.
AT 10.0 FEET: WATER LEVELS WILL INUNDATE MENDENHALL
CAMPGROUND WITH UP TO 3 FEET OF WATER COVERING LOW AREAS AS
WELL AS UP TO 1.5 FEET OF WATER COVERING SKATERS CABIN ROAD.
PORTIONS OF WEST GLACIER TRAIL WILL BE IMPASSABLE. AREAS
ALONG VIEW DR WILL START TO FLOOD AND CAUSE MINOR FLOODING OF
YARDS. CLOSURE OF PEDESTRIAN PATHWAYS BENEATH BROTHERHOOD
BRIDGE AND THE TRAIL SYSTEM ON THE WEST SIDE OF MENDENHALL
RIVER DURING OUTBURST EVENTS.
AT 10.5 FEET: SIGNIFICANT FLOODING ALONG THE MENDENHALL LAKE
AREA WITH MORE THAN 3 FEET OF WATER IN PLACES NEAR MT.
MCGINNIS TRAILHEAD AND THE MENDENHALL CAMPGROUND WILL BE
EVACUATED.
AT 11.0 FEET: SOME HOMES ALONG VIEW DR WILL HAVE UP TO 1.5
FEET OF WATER IN YARDS. LOCATIONS BELOW BACK LOOP BRIDGE WILL
SEE BANK EROSION ALONG UNREINFORCED RIVER BANKS ALONG WITH
HAZARDOUS NAVIGATION FROM DEBRIS IN THE RIVER. HOMES ALONG
THE RIVER ON MEANDER WAY WILL BEGIN TO SEE FLOODING OF SOME
BACKYARDS ON THE OUTSIDE OF THE HESCO LEVEE. PORTIONS OF THE
DREDGE LAKE TRAIL SYSTEM WILL BE IMPASSABLE. FLOOD WATERS
START TO REACH DREDGE LAKE.
AT 11.5 FEET: THE LOW SECTION OF ROAD PAST 9374 VIEW DR WILL
BEGIN TO FLOOD ALONG WITH WATER APPROACHING SOME HOMES
TOWARDS THE END OF ROAD.
AT 12.0 FEET: SIGNIFICANT BANK EROSION ALONG UNREINFORCED
RIVER BANKS. THE LOW SECTION OF ROAD PAST 9374 VIEW DR WILL
BE FLOODED WITH UP TO 0.5 FEET OF WATER. SOME HOUSES ON THE
SOUTH SIDE AND THE EAST END OF VIEW DR WILL START TO FLOOD.
WATER BEGINS TO FLOOD SOME BACKYARDS OF HOMES ON THE
NORTHSIDE OF VIEW DR AS WELL AS OTHER LOW LYING AREAS. BACK
LOOP RD BRIDGE WILL BE CLOSED DURING OUTBURST EVENTS.
AT 12.5 FEET: 2 TO 4 FEET OF WATER IN SOME BACKYARDS ALONG
MEANDER WAY ON THE THE RIVER SIDE OF THE HESCO LEVEE.
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 13.5 FEET: WATER STARTS TO BACK UP BEHIND HOMES BETWEEN
RIVERSIDE DR AT TOURNURE ST AND MENDENHALL RIVER SCHOOL.
LOCATIONS ON RIVER RD WITH LOW RIVER BANKS WILL BEGIN TO SEE
WATER INUNDATE YARDS. SEVERE BANK EROSION ALONG UNREINFORCED
RIVER BANKS.
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.
AT 16.0 FEET: WATER STARTS TO OVERTOP THE BANK AND FLOOD LOW
LYING AREAS NEAR WILDMEADOW LN. UP TO 0.5 FEET OF WATER WILL
BE IN THE INTERSECTION OF SKATERS CABIN RD AND ARCTIC CIR.
SOME BACKYARDS OF HOMES BETWEEN TAMARACK CT AND WHITEWATER CT
WILL START TO SEE FLOOD WATERS ALONG WITH WATER APPROACHING
RIVER RD NEAR HOMES WITH LOW RIVER BANKS AND POSSIBLY
FLOODING THOSE HOMES. WATER WILL START TO FLOOD BACKYARDS OF
HOMES ON MEADOW LN AND STIKINE ST.
AT 17.0 FEET: THIS IS AN ESTIMATE THAT WATER WILL BE
OVERTOPPING THE RIVER BANKS AND FLOODING INTO THE HOMES
AROUND WILDMEADOW LN. BUSINESSES IN THE VINTAGE PARK BLVD
AREA WILL BE SURROUNDED AND POTENTIALLY INUNDATED BY FLOOD
WATERS. HOMES ON MEADOW LN FROM STIKINE ST TO EAGLE ST WILL
BE INUNDATED WITH FLOOD WATER. WATER WILL BE COVERING
TOURNURE ST FROM RIVERSIDE DR TO COLUMBIA BLVD. BLACK WOLF
WAY AND POND VISTA DR WILL HAVE WATER ACROSS THE ROADS. ALL
PARTS OF VIEW DR WILL BE COVERED BY FLOOD WATER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
STAY TUNED TO FURTHER DEVELOPMENTS BY LISTENING TO YOUR LOCAL RADIO,
TELEVISION, OR NOAA WEATHER RADIO FOR FURTHER INFORMATION.
LAT...LON 5841 13460 5842 13460 5845 13460 5847 13456
5846 13452 5844 13447 5843 13447 5840 13454
5836 13459 5835 13460 5836 13462
SPENCER.FIELDING
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