Severe Flooding in Alaska’s Denali National Park

http://www.wunderground.com/blog/weatherhistorian/comment.html?entrynum=285

By: Christopher C. Burt , 6:43 PM GMT on June 27, 2014

Severe flooding has affected portions of Denali National Park and Preserve in interior Alaska. A large area of rain impacted most of mainland and southeast Alaska on Wednesday and Thursday June 25-26 with some historical accumulations. This is a guest blog courtesy of Brian Brettschneider of Borealis Scientific, LLC in Anchorage, Alaska.

The three most prominent NWS stations in Alaska (Anchorage, Juneau, and Fairbanks) all received greater than 3/4” precipitation for the first time on record for a same single day of the year.

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While the precipitation totals in the table above would not be all that impressive for most places in the U.S., they are highly anomalous for interior Alaska. Many of the 24-hour rainfall totals are greater than the 10-year recurrence interval and in some case approach the 25-year recurrence interval according to the NOAA Precipitation Frequency Atlas for Alaska (e.g., the 24-hour total at Wonder Lake is slightly less than the 25-year recurrence interval).

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