August 21st, 1883 Rochester Tornado
"During the late afternoon and evening of August 21, 1883, three significant tornadoes (two F3s and one F5) occurred in southeast Minnesota. These tornadoes affected parts of Dodge, Olmsted, and Winona counties, and they accounted for 40 fatalities and over 200 injuries. Prior to these tornadoes, there were only three hospitals in the state of Minnesota outside of the Twin Cities. None of these hospitals were located near Rochester. After the F5 tornado struck Rochester, a dance hall (Rommel Hall) was transformed into a temporary emergency room. Doctors William Mayo and his two sons (William and Charles) took charge of caring for patients. Mother Mary Alfred Moes of the Sisters of St. Francis helped care for patients as well. After this disaster the Mayo family and the Sisters of St. Francis realized the need of a hospital in Rochester. They banded together to form St. Mary's Hospital, which ultimately led to the creation of the Mayo Clinic."
Rainfall Since Wednesday
A slow moving storm system was responsible for some widespread and much needed rainfall across the region. A few locations picked up several inches of rain indicated by the reds and purples below. One of those locations was Cambridge, MN on Wednesday who saw nearly 5" of rain, which lead to flooding around town. There were also some heavy amounts around the Twin Cities metro, but the MSP Airport seemed to get missed by the heaviest.
Rainfall at the MSP Airport Since Monday
Here's how much rain has fallen at the MSP Airport since Monday. Again, we had some much needed rain, but only 0.67" fell at this particular climate site. Interestingly, there were some 2" to 3" + tallies reported just north and east of the MSP metro, including St. Paul.
August Weather Summary For The Twin Cities
The first half of the month was hot and dry, but things have been a little cooler and wetter as of late. Through the first 19 days of August, temps have been running pretty close to average and after nearly 2/3rds of an inch of rain, we're now running a surplus in the precipitation department, which is great news!
August Precipitation
Here's how much rain has fallen across the region through the first 3 weeks of August. Note that a few locations are running more than 1" above average, including Brainerd and St. Cloud. Sioux Falls has seen nearly 7" of rain so far this month (nearly 4.70" above average) and currently at the 3rd wettest August on record.
Summer Precipitation
Taking a look at precipitation so far this summer (since June 1st), it's a mixed story. A few locations are running above average, but other locations are running well below average, including the Twin Cities, which is still nearly -6" below average.
12th Driest Summer at MSP
Here are the 15 driest summer's on record at MSP. Note that this summer (since June 1st) has been the 12th driest, last year was the 11th driest. If MSP doesn't see any additional rainfall through the rest of August, this would be the 6th driest summer on record.