Thunderstorms developed along a stationary boundary near the Red River and moved south in the prevailing north flow aloft. The strongest storms produced wind gusts in excess of 70 mph in Grayson County.

Thunderstorm Wind in GRAYSON, TEXAS
From 05-AUG-09 15:00:00 to 05-AUG-09 15:00:00 (CST-6)
Location: FINK
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An amateur radio operator estimated a 60 mph wind gust near the Denison Dam.

Thunderstorm Wind in GRAYSON, TEXAS
From 05-AUG-09 15:15:00 to 05-AUG-09 15:15:00 (CST-6)
Location: DENISON
Magnitude: 61.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees fell onto many homes in Denison, a parked truck and boat, and onto two carports.

Thunderstorm Wind in GRAYSON, TEXAS
From 05-AUG-09 15:30:00 to 05-AUG-09 15:30:00 (CST-6)
Location: (F39)SHERMAN-DENISON
Magnitude: 65.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Newspaper

An air traffic controller at Grayson County Airport stated the airport had measured a wind gust of 75 mph.

Thunderstorm Wind in GRAYSON, TEXAS
From 05-AUG-09 15:50:00 to 05-AUG-09 15:50:00 (CST-6)
Location: SHERMAN MUNI ARPT
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An amatuer radio operator estimated a 70 mph wind gust and vehicles being blown off the roadways.

Thunderstorm Wind in GRAYSON, TEXAS
From 05-AUG-09 15:57:00 to 05-AUG-09 15:57:00 (CST-6)
Location: SHERMAN MUNI ARPT
Magnitude: 60.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An amateur radio operator reported several power poles were leaning and multiple power flashes in the city of Sherman.

Thunderstorm Wind in COLLIN, TEXAS
From 05-AUG-09 16:16:00 to 05-AUG-09 16:16:00 (CST-6)
Location: MELISSA
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An amateur radio operator estimated a wind gust of 70 mph and reported large tree limbs were down.

Thunderstorm Wind in COOKE, TEXAS
From 05-AUG-09 15:18:00 to 05-AUG-09 15:18:00 (CST-6)
Location: CALLISBURG
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A storm spotter reported a wind gust of 60 mph 2 miles east-southeast of Callisburg.

Thunderstorm Wind in GRAYSON, TEXAS
From 05-AUG-09 15:30:00 to 05-AUG-09 15:30:00 (CST-6)
Location: DENISON MCKEON ARPT
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

A tower at Grayson Community College was blown down onto the Grounds Maintenance Building and the Criminal Justice Building lost most of its roof due to high winds.

Thunderstorm Wind in GRAYSON, TEXAS
From 05-AUG-09 15:39:00 to 05-AUG-09 15:39:00 (CST-6)
Location: SHERMAN MUNI ARPT
Magnitude: 62.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A storm spotter measured a 71 mph wind gust at the intersection of Farm-to-Market Road 1417 and Lamberth Rd.

Thunderstorm Wind in GRAYSON, TEXAS
From 05-AUG-09 15:05:00 to 05-AUG-09 15:05:00 (CST-6)
Location: (F39)SHERMAN-DENISON
Magnitude: 62.00 MG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A storm spotter measured a 71 mph wind gust northwest of Sherman on Plainview Rd.

Thunderstorm Wind in COOKE, TEXAS
From 05-AUG-09 15:23:00 to 05-AUG-09 15:23:00 (CST-6)
Location: GAINESVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported a wind gust of 58 mph and powerlines down in the city of Gainesville.

Thunderstorm Wind in COOKE, TEXAS
From 05-AUG-09 15:43:00 to 05-AUG-09 15:43:00 (CST-6)
Location: GAINESVILLE MUNI ARP
Magnitude: 54.00 MG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: AWOS

The automated weather station in Gainesville measured a 64 mph wind gust.

Thunderstorm Wind in GRAYSON, TEXAS
From 05-AUG-09 15:15:00 to 05-AUG-09 15:15:00 (CST-6)
Location: DENISON
Magnitude: 61.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Newspaper

A man was injured on the 1600 block of West Bond when a large tree fell through his home. He suffered minor cuts and bruises.