A truly remarkable rain event has unfolded in Southwest Alaska over the last several days. Both McGrath and Aniak have received 2-day rainfalls with recurrence intervals of greater than 10-years. Aniak's total of 2.41" is their 8th largest 2-day precipitation value and McGrath's 2.12" is their 4th largest 2-day value. At Togiak, 3.35" was recorded during the same 2-day period – including an amazing 1.50" in three hours. Unfortunately there is no GHCN database for Togiak to determine where this falls in the historical record.
** Update: With 1.01" on 9/3, the 3-day total at Aniak is now the third greatest on record and the second greatest non-repeating event (see below).
Below is the storm total precipitation radar image for 8/31/13 through 9/2/2013.