Image (click to enlarge): 24-hour precipitation ending at 7 am CDT, June 10, 2012 in the Mobile-Pensacola region, from National Weather Service5 PM CDT Update: Rainfall has gradually tapered off this afternoon at Pensacola, but the daily total is up to 1.92".
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Excessive rainfall from a nearly stationary non-tropical storm crushed the daily precipitation record at Pensacola, Florida on June 9 (Saturday). The 13.13" of rain drowned the old record of 1.95" set in 1913 by a factor of 6.7 to 1. It was also the second highest all-time daily rainfall amount, exceeded only by the 15.29" from a tropical storm on October 5, 1934. The previous all-time June daily record was 10.10" on the 29th in 1887.
Over 1" fell in each of 5 consecutive hours and in 7 out of 8 consecutive hours. The largest amount was 3.17" (over 1" more than the previous daily record) in the hour ending at noon. An additional 1.51" of rain had already been recorded by 1 pm CDT today. The record for June 10 is 2.81" in 1968. Pensacola climate records began in 1879.
The 5.79" at Mobile, Alabama also smashed the June 9 record, which was 1.39" in 1968.
This schematic map from the National Weather Service shows a slow-moving upper-level low pressure area and a stationary front along the Gulf Coast (click to enlarge):
Contrast the current situation with the track of the October 1-6, 1934 tropical storm, from NOAA (click to enlarge):
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