Minnesota's Wet Summer - 2010


stream flow Map
USGS real-time streamflow

The summer of 2010 was exceptionally wet over large portions of Minnesota. Frequent, and often heavy, rainfall events, along with associated severe weather episodes, dominated the Minnesota summer weather story.

The large seasonal rainfall totals were primarily the result of a wet June and heavy downpours in August. Summer rainfalls totals in excess of 14 inches were reported in many locations, topping the historical average by four or more inches (see maps below). Total summer precipitation exceeded 18 inches in portions of west central, east central, south central, and southeastern Minnesota. When compared with historical rainfall totals, summer 2010 values ranked above the 90th percentile (one year in ten) in many Minnesota's counties. In some locations, summer rainfall totals were near, or above, all-time record high totals.

The heavy rains produced localized urban and rural flooding. High water levels in lakes and wetland complexes are a concern in portions of west central Minnesota. Stream discharge values at numerous Minnesota monitoring locations are above the 90th percentile for the date (see map at right). Nevertheless, the abundant summer rain had a positive impact in most areas. Sections of north central and east central were freed of the drought designations attributed to these counties earlier in the summer. Minnesota's major row crops are reported to be in good to excellent condition due to adequate soil moisture, an early planting season, and above-average heat units.

2010 seasonal precipitation maps:

seasonal precipitation: June 2, 2010 - August 30, 2010 seasonal precipitation departure: June 2, 2010 - August 30, 2010 seasonal precipitation rank: June 2, 2010 - August 30, 2010