Severe Thunderstorms in Southern Minnesota August 2, 2009
After one of the warmer days in weeks for southern Minnesota, thunderstorms rapidly developed during the mid to late evening hours of Sunday August 2. Low pressure over eastern South Dakota and was the primary focus for thunderstorms as it moved across the southern third of Minnesota. A warm and moist air mass ahead of this low led to significant instability. As the low approached and thunderstorms developed Sunday night, they intensified, and dropped some large hail. Baseball size hail was reported one mile south of Bird Island in Renville County. These storms did provide some beneficial rain to southern Minnesota as they moved northeast across the southern half of the Twin Cities metro area and eventually into western Wisconsin.
Below is a Local Storm Report on the August 2 storms courtesy the National Weather Service.
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
216 AM CDT MON AUG 03 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0936 PM HAIL SEAFORTH 44.48N 95.33W
08/02/2009 M0.88 INCH REDWOOD MN TRAINED SPOTTER
0936 PM HAIL 3 SW LUCAN 44.38N 95.45W
08/02/2009 M1.00 INCH REDWOOD MN TRAINED SPOTTER
0943 PM HAIL 7 S OLIVIA 44.67N 95.00W
08/02/2009 M1.00 INCH RENVILLE MN TRAINED SPOTTER
0948 PM HAIL 5 SW OLIVIA 44.73N 95.06W
08/02/2009 M1.75 INCH RENVILLE MN TRAINED SPOTTER
0950 PM HAIL 1 S BIRD ISLAND 44.75N 94.89W
08/02/2009 M2.75 INCH RENVILLE MN STORM CHASER
GOLF BALL TO BASEBALL SIZED HAIL STILL COVERING GROUND AT
1010 CDT PM.
1000 PM HAIL 4 WSW CLEMENTS 44.35N 95.13W
08/02/2009 M1.00 INCH REDWOOD MN TRAINED SPOTTER
1002 PM HAIL 3 S CLEMENTS 44.34N 95.05W
08/02/2009 M0.88 INCH REDWOOD MN TRAINED SPOTTER
1005 PM HAIL 5 E OLIVIA 44.76N 94.90W
08/02/2009 M1.75 INCH RENVILLE MN TRAINED SPOTTER
1008 PM HAIL 2 NE HECTOR 44.76N 94.68W
08/02/2009 M2.00 INCH RENVILLE MN TRAINED SPOTTER
1015 PM HAIL 1 N SPRINGFIELD 44.25N 94.98W
08/02/2009 E1.00 INCH BROWN MN CO-OP OBSERVER
1023 PM HAIL HUTCHINSON 44.89N 94.37W
08/02/2009 M0.75 INCH MCLEOD MN TRAINED SPOTTER
1027 PM HAIL 5 S HUTCHINSON 44.82N 94.37W
08/02/2009 M1.00 INCH MCLEOD MN TRAINED SPOTTER
1036 PM HAIL E STEWART 44.72N 94.48W
08/02/2009 M1.00 INCH MCLEOD MN TRAINED SPOTTER
1054 PM HAIL 5 N BROWNTON 44.81N 94.35W
08/02/2009 M1.75 INCH MCLEOD MN LAW ENFORCEMENT
1055 PM FUNNEL CLOUD 2 SSE NORWOOD/YOUNG AME 44.75N 93.90W
08/02/2009 CARVER MN TRAINED SPOTTER
1114 PM HAIL 2 ENE NEW AUBURN 44.68N 94.19W
08/02/2009 M0.75 INCH SIBLEY MN TRAINED SPOTTER
1223 AM HAIL ROBERTS 44.99N 92.55W
08/03/2009 M1.00 INCH ST. CROIX WI TRAINED SPOTTER