Juneau Borough storm history

The level of Mendenhall Lake was already above the minor flood stage of 9 feet due to an atmospheric river and heavy rain in the days leading up to the event when the outburst flood started on the morning of Tuesday August 12th. By 1200 AKST the water levels had risen 1 foot to b…

The level of Mendenhall Lake was slightly below normal levels of 5.0 feet before this event started in the early morning hours of Sunday August 4th. Twenty four hours into the flooding event, by noon on Monday, water levels had risen 5 feet and were over the moderate flood stage …

The level of Mendenhall Lake was near normal levels of 5.5 feet before this event started, late Thursday August 3rd, and by Saturday morning water levels were over moderate flood stage of 10 feet. By this time areas near Skaters Cabin Rd, View Dr, and the Mendenhall Glacier Visit…

As the atmospheric river moved over the north central inner channels of Southeast Alaska it produced significant amount of precipitation from December 1-2. Heavy to moderate rainfall persisted over 36 hours with the highest amounts coming during the overnight hours going into Dec…

The City & Borough of Juneau Parks and Recreation teams closed the Auke Lake Trail on Saturday after two landslides were observed. The first landslide was reported via social media at approximately 130pm AKDT on the 20th between the two docks at Auke Lake. The second reported lan…

A sudden wind shift to the south from a strengthening squall line measured a peak gust of 73mph at the top of the Mt. Roberts Tram at 304pm and a peak gust of 60mph at the top of the Federal Building at 310pm AKDT. The NOS Juneau Tide Gauge at the USCG dock measured a peak gust o…

The Mendenhall Lake Gauge rose above the moderate flood stage of 10 feet at 715pm AKST on Sunday October 20th, crested at 10.8 feet at 1130pm, and fell below moderate flood stage at 1am AKDT on the 21st. There were reports of trees and debris floating down the river and water int…

Rain and rising freezing levels moved over the Juneau area through the evening hours of January 28th. The rain continued to increase in intensity and with the rising freezing level, a significant amount of runoff was going into local rivers and streams. Jordan Creek started to ri…

Heavy rain moved into the Juneau area in the late afternoon of September 20th and continued to increase through the overnight hours with 1.5 to 2 inches of rainfall by 0700AKDT. Jordan Creek near the Juneau airport start to respond to this heavy rain with a sharp rise upward and …

The USGS Mendenhall Lake gauge started to rise from moderate rainfall through the afternoon of October 25th. The lake continue to rise from heavy rain of 1 to 2 inches with more in the mountains. Mendenhall Lake water level rate of rise changed and it started to rise at a steeper…

Moderate precipitation fell over the the Jordan Creek area in Juneau from the afternoon of September 29th to day break on September 30th. This precipitation of 1 to 1.5 inches of rain in 12 to 18 hours rose Jordan Creek to be just below bankful. Heavy rain associated with a stron…

Around 1700AKST on September 26th there was a strong wind shift to the west after hours of strong southeast winds and heavy rain with 3 hour amounts of over 0.50 leading up to the event. The ground was saturated and the wind shift triggered a large tree to fall from steep terrain…

AKDOT respond to a small shallow landslide around mile marker 31 along Glacier Highway which closed the highway for a period of time. The slide was reported around 1700AKST which was was the front went through the area and there was very high rain rates of over 0.50 in 3 hours af…

Jordan Creek in Juneau started to rise in response to the heavy rain through September 26th with it going over minor flood stage of 9.7 feet in the late evening hours. Water levels continued to rise at a fast pace from 12 hour rain of amounts of over 1.50 inches. The runoff from …

Showers were moving across the Juneau area with most of them being light to moderate. A very strong shower moved over the Juneau airport around 1500AKST and persisted for the next 2 hours. This produced 1.03 of rainfall which is a 50 year return period rainfall intensity. Jordan …

The Mendenhall Lake rose sharply through early morning on August 13th and went above minor flood stage of 9.0 feet by 545AKDT. The precipitation intensity continued to increased through the late morning of August 13th and combined with the high magnitude of warm air associated wi…

The Taku River water levels were at record daily stream flows hovering just below minor flooding stage of 43 feet by the end on July from well above normal snowpack, delayed snowmelt from a cool spring and then rapid snowmelt from impacts of an atmospheric river and then record h…

July and the beginning of August was very wet and the soils were primed. As moderate to heavy rains moved over the area on the morning of August 9th Mendenhall Lake continued to rise from the previous rains but at a steeper rate. There was a short break in the rain amounts and th…

This event spanned the months of July and August. In the morning hours of July 30th the Mendenhall Lake and River began to slowly rise, the lake had been on a slow up tick as water from Suicide Basin was over topping the ice dam of the Mendenhall Glacier. Air reconnaissance durin…

This event spanned the months of July and August. In the morning hours of July 30th the Mendenhall Lake and River began to slowly rise, the lake had been on a slow up tick as water from Suicide Basin was over topping the ice dam of the Mendenhall Glacier. Air reconnaissance durin…

Most of the damage from the erosion when culverts were overwhelmed or blocked and debris flows that blocked roadways in Douglas were reported by trained weather spotters or emergency management right after midnight on October 6th. There was multiple calls from the public located …

After a very dry period for the northern inner channels of Southeast Alaska moderate to heavy rains moved over the area on August 7th. The high rain rates continued for the next forty-eight to seventy-two hours. Rainfall totals from this time frame ranged from two to three inches…

In the early morning hours of July 18th the Mendenhall Lake and River began to slowly rise as the glacier dammed lake in Suicide Basin about 2 miles from the terminus started to drain. Mendenhall Lake and River continue to rise for the next day and a half as the dammed lake empti…

As moderate rain fell through the day on the 26th, Jordan Creek began to slowly rise from about one inch of rainfall in 12 hours. The creek's rate of rise started to sharpen overnight on the 26th as the snow pack in the headwaters became primed to produce more runoff to go along …

In the afternoon of June 29th the Mendenhall Lake and River began to slowly rise as the glacier dammed lake in Suicide Basin about 2 miles from the terminus started to drain. Mendenhall Lake and River continue to rise for the next two days as the dammed lake emptied. The water le…

This event was very difficult to identify due to the heavy rain masking the the much bigger event going on, the second release of the glacier dammed lake in Suicide Basin. It was about one month to the date when the first outburst flood from Suicide Basin took place. There were t…

A weather front moved across the north central inner channels on July 14 and produced about one half to three quarters of an inch of rainfall. The Taku River began to rise from the rain runoff but instead of dropping off once the rain let up the river rose significantly. At the s…

The annual glacier lake outburst flood that takes place on the Mendenhall Lake and River was a record event this year. Once the twelve billion gallons, that accumulated throughout the spring and early summer, in the basin began to drain on Thursday July 9 the lake rose significan…

Lake and River levels on the Mendenhall system rose throughout the day on August 22 2011 from heavy rain fall that produced high rain rates from tropical moisture as an atmospheric river moved over the Juneau area. The river and lake stages reached moderate flood stage and produc…

The two river gauges (Mendenhall Lake, Mendenhall River) on the system both reach the second highest stage in history and went above moderate flood stage. The Mendenhall Lake and River stages continue to rise for a few days when it was clear and dry. The look of the hydrograph in…