RSS FeedsAugust 2, 2009: Up to Baseball Size Hail West of the Twin Cities
Event Synopsis | Storm Reports
After one of the warmer days in weeks for southern Minnesota, thunderstorms rapidly developed during the mid to late evening Sunday across southwest Minnesota. These evolved east northeast into the southern half of the Twin Cities metro area and eventually into western Wisconsin. Low pressure had developed during the afternoon in 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 which had built through the day. As the low approached and thunderstorms developed Sunday night, they fueled on this instability, developing large hail aloft which would eventually fall in several locations. Baseball size hail was the maximum reported in a storm that exhibited a top to around 60,000 ft. The storms would continue to be a hail threat and also at times a wind threat as they evolved towards and through the Twin Cities. They did provide some rainfall to the very dry eastern Minnesota and western Wisconsin. From earlier showers in the day and the evening thunderstorms, the Ladysmith, Wisconsin airport reported 3.43 inches. Other rainfall reports can be found here.
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August 2, 2009: 10 pm Surface Weather Map |
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Aug 2: 9:53 pm 0.5° Radar Image |
Aug 2: 9:53 pm 2.4° Radar Image |
Aug 2: 9:53 pm Radar Storm Top |
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NWS Chanhassen Doppler Radar lowest level reflectivity image of the storm which was producing golf ball to baseball size hail just south of Bird Island in Renville County at this time. |
NWS Chanhassen Doppler Radar reflectivity image of the storm at around 16,000 ft, or around only 22 degrees F°, which was prodcuing golf ball to baseball size hail just south of Bird Island in Renville County at this time. This indicated a great amount of ice within this storm. |
NWS Chanhassen Doppler Radar estimated top of the baseball hail producing storm. This was measured at approximately around an impressive 60,000 ft. |
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Aug 2, 2009: 10:53 pm Radar Image |
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NWS Chanhassen Doppler Radar reflectivity image of the storm which produced golf ball size hail five miles north of Brownton. This formed in the wake of the one to its northeast, which had produced the baseball size hail in Renville County. |
The map above and the below listing are of severe weather reports received during or soon after the event by the National Weather Service from local government officials or trained storm spotters. These reports should be considered preliminary and are open to further quality controlling by NWS officials. For reports from across the country on August 2, click here and for August 3 click here.
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
1030 PM HAIL 5 NW MADELIA 44.10N 94.49W
08/02/2009 M1.00 INCH WATONWAN MN EMERGENCY MNGR
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
1057 PM TORNADO 4 W NORWOOD/YOUNG AME 44.78N 94.000W
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
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