Thunderstorms began to develop across portions of southern Minnesota the night of August 7th before midnight. A strong low level jet and deep moisture advection caused several waves of thunderstorms to develop along a line from near Hutchinson Minnesota, to the southern Twin Cities metro area, and into portions of west central Wisconsin. Two to four inches of rainfall was common in a six hour period, with the heaviest rain being four to six inches in the southwest metro, especially near Chaska. Several reports of flooding were received, with stalled cars and significant street flooding in low lying areas. In addition to the flooding, several large hail reports were also received from the strongest storms.

Flash Flood in ANOKA, MINNESOTA
From 08-AUG-09 09:43:00 to 08-AUG-09 11:30:00 (CST-6)
Location: JOHNSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The local law enforcement officials reported significant street flooding near County Road 10 and Jefferson Street in Blaine, Minnesota.

Heavy Rain in MCLEOD, MINNESOTA
From 08-AUG-09 00:00:00 to 08-AUG-09 06:00:00 (CST-6)
Location: LESTER PRAIRIE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A local COOP Observer recorded 5.96 inches of rainfall in a six hour period.

Hail in RENVILLE, MINNESOTA
From 08-AUG-09 07:20:00 to 08-AUG-09 07:20:00 (CST-6)
Location: RENVILLE ARPT
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy Rain in MCLEOD, MINNESOTA
From 08-AUG-09 00:00:00 to 08-AUG-09 06:00:00 (CST-6)
Location: HUTCHINSON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A COOP Observer measured 4.01 inches of rainfall overnight.

Heavy Rain in STEARNS, MINNESOTA
From 08-AUG-09 00:00:00 to 08-AUG-09 05:00:00 (CST-6)
Location: KIMBALL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured 4.16 inches of rainfall overnight.

Heavy Rain in HENNEPIN, MINNESOTA
From 08-AUG-09 00:30:00 to 08-AUG-09 06:30:00 (CST-6)
Location: ST LOUIS PARK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured 1.95 inches of rainfall overnight.

Heavy Rain in SCOTT, MINNESOTA
From 08-AUG-09 00:30:00 to 08-AUG-09 06:30:00 (CST-6)
Location: SHAKOPEE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured 4.62 inches of rainfall overnight.

Heavy Rain in SCOTT, MINNESOTA
From 08-AUG-09 01:00:00 to 08-AUG-09 07:00:00 (CST-6)
Location: JORDAN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured 4.00 inches of rainfall overnight.

Flash Flood in SCOTT, MINNESOTA
From 08-AUG-09 01:30:00 to 08-AUG-09 04:30:00 (CST-6)
Location: SHAKOPEE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The local law enforcement officials in Shakopee, Minnesota reported several stalled cars due to high water and significant street flooding.

Hail in STEARNS, MINNESOTA
From 08-AUG-09 04:40:00 to 08-AUG-09 04:40:00 (CST-6)
Location: ST CLOUD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in STEARNS, MINNESOTA
From 08-AUG-09 03:25:00 to 08-AUG-09 03:25:00 (CST-6)
Location: KIMBALL PRAIRIE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy Rain in CARVER, MINNESOTA
From 08-AUG-09 00:00:00 to 08-AUG-09 06:00:00 (CST-6)
Location: WATERTOWN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An off duty NWS employee measured 2.44 inches of rainfall overnight.

Heavy Rain in DAKOTA, MINNESOTA
From 08-AUG-09 01:00:00 to 08-AUG-09 07:00:00 (CST-6)
Location: ORCHARD GARDENS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter in Burnsville, Minnesota measured 3.70 inches of rainfall overnight.

Heavy Rain in SCOTT, MINNESOTA
From 08-AUG-09 01:00:00 to 08-AUG-09 07:00:00 (CST-6)
Location: PRIOR LAKE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Two off duty National Weather Service employees in Prior Lake, Minnesota reported nearly four inches of rainfall in a six hour period.

Flash Flood in DAKOTA, MINNESOTA
From 08-AUG-09 02:00:00 to 08-AUG-09 04:30:00 (CST-6)
Location: EAGAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported significant street flooding south of Eagan, Minnesota, near the Minnesota Zoo.

Flash Flood in HENNEPIN, MINNESOTA
From 08-AUG-09 09:45:00 to 08-AUG-09 11:30:00 (CST-6)
Location: FLETCHER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A local law enforcement official reported several areas of significant street flooding in the Rogers, Minnesota area with reports of water half way up vehicles.

Heavy Rain in CARVER, MINNESOTA
From 08-AUG-09 00:00:00 to 08-AUG-09 06:00:00 (CST-6)
Location: VICTORIA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The local COOP Observer in Chaska recorded 6.20 inches of rainfall in a six hour period.

Heavy Rain in CARVER, MINNESOTA
From 08-AUG-09 00:00:00 to 08-AUG-09 06:00:00 (CST-6)
Location: WACONIA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A NWS employee recorded 5.49 inches of rainfall in a six hour period.

Heavy Rain in CARVER, MINNESOTA
From 08-AUG-09 00:00:00 to 08-AUG-09 06:00:00 (CST-6)
Location: HAMBURG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A local COOP Observer recorded 5.43 inches of rainfall in a six hour period.

Heavy Rain in MCLEOD, MINNESOTA
From 08-AUG-09 00:00:00 to 08-AUG-09 06:00:00 (CST-6)
Location: BROWNTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The local COOP Observer recorded 4.70 inches of rainfall in a six hour period.

Heavy Rain in CARVER, MINNESOTA
From 08-AUG-09 00:00:00 to 08-AUG-09 06:00:00 (CST-6)
Location: CHANHASSEN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The NWS in Chanhassen recorded 4.87 inches of rainfall in a six hour period.

Heavy Rain in HENNEPIN, MINNESOTA
From 08-AUG-09 00:30:00 to 08-AUG-09 06:30:00 (CST-6)
Location: EDEN PRAIRIE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Flying Cloud Airport in Eden Prairie, Minnesota reported over four inches of rain in a six hour period.