A cluster of thunderstorms developed and moved eastward across Delaware County during the early morning hours of August 13.  One storm was severe downing a tree in Manchester, IA.
During the afternoon and evening, an area of showers and thunderstorms ahead of a cold front over central Iowa moved eastward into eastern Iowa and northern Missouri.  Damaging winds, flooding rains, and lightning accompanied the stronger storms.  High temperatures August 13 were mainly in the upper 80s to middle 90s.  Heat index readings ranged from 100 to 110 degrees.

Thunderstorm Wind in BENTON, IOWA
From 13-AUG-10 12:25:00 to 13-AUG-10 12:25:00 (CST-6)
Location: GARRISON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 60 mph were observed about 5 miles southwest of Vinton, IA at 125 pm CDT August 13.

Thunderstorm Wind in BENTON, IOWA
From 13-AUG-10 12:45:00 to 13-AUG-10 12:45:00 (CST-6)
Location: SHELLSBURG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 mph were observed about 2 miles north of Shellsburg, IA at 145 pm CDT August 13.

Thunderstorm Wind in BUCHANAN, IOWA
From 13-AUG-10 13:15:00 to 13-AUG-10 13:15:00 (CST-6)
Location: MONTI
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind gusts estimated to be 70 mph blew a tree down onto a house about 5 miles southwest of Masonville, IA at 215 pm CDT August 13.

Flash Flood in JEFFERSON, IOWA
From 13-AUG-10 21:00:00 to 14-AUG-10 01:00:00 (CST-6)
Location: FAIRFIELD
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rains resulted in some flash flooding of parts of Fairfield, IA during the late evening of August 13 and early morning of August 14.  The flood water was 1 foot deep across 22nd Street and on W Grimes Avenue.

Flash Flood in JACKSON, IOWA
From 13-AUG-10 22:19:00 to 14-AUG-10 03:00:00 (CST-6)
Location: SPRAGUEVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rains resulted in flash flooding of Deep Creek just west of Preston, IA during the late night of August 13 and early morning of August 14.  The creek flowed across 17th Street at the bridge crossing.  The water was 6 inches deep.

Flash Flood in HENRY, IOWA
From 13-AUG-10 22:21:00 to 14-AUG-10 01:00:00 (CST-6)
Location: WAYLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rains resulted in the flash flooding of some streets in Coppock, IA during the late evening of August 13 and early morning of August 14.

Lightning in WASHINGTON, IOWA
From 13-AUG-10 21:00:00 to 13-AUG-10 21:00:00 (CST-6)
Location: WASHINGTON
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck an apartment building at 311 E Main Street in Washington, IA during the evening of August 13 resulting in a fire.  Fire-fighting crews were dispatched at 1004 pm CDT.

Flash Flood in BUCHANAN, IOWA
From 13-AUG-10 13:10:00 to 13-AUG-10 16:00:00 (CST-6)
Location: WINTHROP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rains resulted in some flash flooding of several intersections along County Road W45 along Buffalo Creek from Wintrop, IA to Monti, IA during the afternoon of August 13.

Thunderstorm Wind in JONES, IOWA
From 13-AUG-10 13:50:00 to 13-AUG-10 13:50:00 (CST-6)
Location: CENTER JCT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 70 mph blew down a large tree near Highway 38 about a half a mile south of County Road E29 near Center Junction, IA around 250 pm CDT August 13.

Flash Flood in LEE, IOWA
From 13-AUG-10 16:00:00 to 13-AUG-10 18:00:00 (CST-6)
Location: KEOKUK
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rains resulted in flash flooding of the intersection of 10th Street and Main Street in Keokuk, IA during the late afternoon and evening of August 13.  The intersection was closed due to the flooding.

Flash Flood in DELAWARE, IOWA
From 13-AUG-10 13:30:00 to 13-AUG-10 17:00:00 (CST-6)
Location: MANCHESTER
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rains resulted in flash flooding of a gravel road near Manchester, IA during the afternoon and evening of August 13.

Thunderstorm Wind in DELAWARE, IOWA
From 13-AUG-10 04:00:00 to 13-AUG-10 04:00:00 (CST-6)
Location: MANCHESTER
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Wind gusts estimated to be 60 mph blew down a large tree in front of the West Delaware Lambert School building in Manchester, IA during the early morning of August 13.

Thunderstorm Wind in BENTON, IOWA
From 13-AUG-10 12:06:00 to 13-AUG-10 12:06:00 (CST-6)
Location: KEYSTONE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gusts estimated to be 70 mph blew a large tree down across a road about 2 miles northeast of Keystone, IA around 106 pm CDT August 13.

Lightning in JOHNSON, IOWA
From 13-AUG-10 13:30:00 to 13-AUG-10 13:30:00 (CST-6)
Location: NORTH LIBERTY
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck a civil defense siren in North Liberty, IA during the afternoon of August 13.  The strike caused the siren to malfunction and activate.