Flood — Wrn Tanana Vly Wrn Yukon Vly, Alaska

2012-09-21 to 2012-09-24 · near Nenana, Wrn Tanana Vly Wrn Yukon Vly, Alaska

Wider weather episode

After a few days of heavy rainfall along the south slopes of the Alaska Range that amounted to several inches of rain, the Nenana River flooded at Nenana and Healy. Minor flooding began around 1000AKST on the 21st at Healy. The boat launch was flooded and water was over the bank and rising up the shoulder of the coal hauling road. The Nenana River rose to the highest stage on record when the river crested at 14.9 ft at Healy on the 22nd and a surge of water continued downstream. The crest was protracted as the water levels remained at the crest for nearly 24 hours. This resulted in the flooding of several structures at Denali National Park, and erosion of the southbound lane at MP240 of the Parks Highway. At Nenana, flooding was observed on the 23rd. Up to one foot of water was reported over 10th Avenue west of the railroad tracks. The road to the cemetery was also reported to be flooded. Water filled the drainage ditches and low lying areas on the east side of the city of Nenana. Water levels dropped and the flooding was over by the morning hours of the 24th.

View location on OpenStreetMap → (64.5500, -149.0800)

Source: NOAA Storm Events Database, event_id 407777. Narrative written by the NWS forecast office that issued the report.