As a frontal system moved northeastward from Middle Tennessee into the Ohio River Valley, the atmosphere became increasingly unstable, and with the influences of daytime heating and passages of upper level disturbances, thunderstorms developed from the early afternoon and lasted well into the evening hours. Several thunderstorms produced damaging thunderstorm winds while two reports of lightning damage occurred also.

Thunderstorm Wind in MONTGOMERY, TENNESSEE
From 12-JUL-09 17:35:00 to 12-JUL-09 17:35:00 (CST-6)
Location: CLARKSVILLE
Magnitude: 55.00 EG
Property damage: 50.00K
Reported by: Law Enforcement

Trees were reported down across the entire county.

Thunderstorm Wind in MARSHALL, TENNESSEE
From 12-JUL-09 14:15:00 to 12-JUL-09 14:15:00 (CST-6)
Location: HICKORY HGTS
Magnitude: 55.00 EG
Property damage: 1.50K
Reported by: Law Enforcement

A tree fell on a house on Holly Grove Road. Extent of damage to house was unknown.

Lightning in MONTGOMERY, TENNESSEE
From 12-JUL-09 13:30:00 to 12-JUL-09 13:30:00 (CST-6)
Location: CLARKSVILLE
Property damage: 75.00K
Reported by: Newspaper

About 200 households lost power in northern portions of Clarksville when the Edgeton substation was struck by lightning.  Power lines and transformers associated with the substation were damaged also.

Lightning in COFFEE, TENNESSEE
From 12-JUL-09 15:00:00 to 12-JUL-09 15:00:00 (CST-6)
Location: TULLAHOMA
Property damage: 10.00K
Reported by: Newspaper

Lightning struck the chimney caps at Tullahoma High School. This resulted in two capstones, estimated to weigh between 250 and 300 pounds, located on the chimney's top brick layer, to topple to the roof below, crashing through it, and causing structural damage. The hole made by the capstone also allowed rainwater to cause further damage inside the school. Total affected area was less than 30 square feet.

Thunderstorm Wind in COFFEE, TENNESSEE
From 12-JUL-09 20:05:00 to 12-JUL-09 20:05:00 (CST-6)
Location: GNAT HILL
Magnitude: 60.00 EG
Property damage: 5.00K
Reported by: Newspaper

A large tree was uprooted at 94 Hoodoo Road in Beechgrove. A canopy rented by the nearby Tater Box restaurant for a car show also received minor damage.

Thunderstorm Wind in WILLIAMSON, TENNESSEE
From 12-JUL-09 15:25:00 to 12-JUL-09 15:25:00 (CST-6)
Location: MUDSINK
Magnitude: 55.00 EG
Property damage: 25.00K
Reported by: Law Enforcement

Numerous trees were downed across central portions of the county.

Thunderstorm Wind in MAURY, TENNESSEE
From 12-JUL-09 19:13:00 to 12-JUL-09 19:13:00 (CST-6)
Location: DARKS MILL
Magnitude: 55.00 EG
Property damage: 50.00K
Reported by: Law Enforcement

Numerous trees were downed. One tree fell on a barn. Several trees blocked area roadways. Power lines were downed.

Thunderstorm Wind in WAYNE, TENNESSEE
From 12-JUL-09 21:33:00 to 12-JUL-09 21:33:00 (CST-6)
Location: WAYNESBORO
Magnitude: 55.00 EG
Property damage: 1.50K
Reported by: Emergency Manager

Tree was blown down on house trailer. Extent of any damage to house trailer was unknown.

Thunderstorm Wind in WAYNE, TENNESSEE
From 12-JUL-09 22:10:00 to 12-JUL-09 22:10:00 (CST-6)
Location: WOODLAWN
Magnitude: 55.00 EG
Property damage: 10.00K
Reported by: Emergency Manager

Trees were downed in Collinwood.

Thunderstorm Wind in WILLIAMSON, TENNESSEE
From 12-JUL-09 15:30:00 to 12-JUL-09 15:30:00 (CST-6)
Location: LITTLE TEXAS
Magnitude: 60.00 EG
Property damage: 25.00K
Reported by: Broadcast Media

Broadcast Media relayed this report through email to our office from the public. Three hundred yard wide path of tree damage along Saddle Springs Road and the surrounding
area. Several trees were reported downed. Additional details included tree debris covering almost all the surfaces of the back of a resident's home, including the back porch and pool area. Portions of Saddle Springs Road were covered with downed trees also and made the road impassible.

Thunderstorm Wind in CHEATHAM, TENNESSEE
From 12-JUL-09 17:10:00 to 12-JUL-09 17:10:00 (CST-6)
Location: PLEASANT VIEW
Magnitude: 55.00 EG
Property damage: 10.00K
Reported by: Newspaper

Several trees were reported down in the Pleasant View area. This included trees being down on Triangle Road, Highway 41-A, and in the Harris Farm subdivision.

Thunderstorm Wind in RUTHERFORD, TENNESSEE
From 12-JUL-09 19:25:00 to 12-JUL-09 19:25:00 (CST-6)
Location: BARFIELD
Magnitude: 55.00 EG
Property damage: 10.00K
Reported by: Newspaper

Several trees downed along Southridge Blvd.

Thunderstorm Wind in DICKSON, TENNESSEE
From 12-JUL-09 18:10:00 to 12-JUL-09 18:10:00 (CST-6)
Location: CHARLOTTE
Magnitude: 55.00 EG
Property damage: 10.00K
Reported by: Law Enforcement

Several trees were downed in Charlotte.

Thunderstorm Wind in ROBERTSON, TENNESSEE
From 12-JUL-09 18:10:00 to 12-JUL-09 18:10:00 (CST-6)
Location: SPRINGFIELD
Magnitude: 55.00 EG
Property damage: 50.00K
Reported by: Law Enforcement

Trees were downed county wide.

Thunderstorm Wind in SUMNER, TENNESSEE
From 12-JUL-09 18:30:00 to 12-JUL-09 18:30:00 (CST-6)
Location: GRABALL
Magnitude: 55.00 EG
Property damage: 50.00K
Reported by: Emergency Manager

Trees and power lines were downed across the northern portion of the county.

Thunderstorm Wind in MARSHALL, TENNESSEE
From 12-JUL-09 19:30:00 to 12-JUL-09 19:30:00 (CST-6)
Location: LEWISBURG
Magnitude: 55.00 EG
Property damage: 50.00K
Reported by: Law Enforcement

Trees were downed county wide.

Thunderstorm Wind in COFFEE, TENNESSEE
From 12-JUL-09 20:05:00 to 12-JUL-09 20:05:00 (CST-6)
Location: FAIRVIEW
Magnitude: 55.00 EG
Property damage: 1.50K
Reported by: Law Enforcement

Tree downed and on fire along U.S Highway ALT. 41 near the Bedford County Line.

Thunderstorm Wind in WAYNE, TENNESSEE
From 12-JUL-09 21:30:00 to 12-JUL-09 21:30:00 (CST-6)
Location: TOPSY
Magnitude: 55.00 EG
Property damage: 25.00K
Reported by: Emergency Manager

Trees were downed across State Highway 48 and State Highway 13.

Thunderstorm Wind in CHEATHAM, TENNESSEE
From 12-JUL-09 18:05:00 to 12-JUL-09 18:05:00 (CST-6)
Location: OAKPLAIN
Magnitude: 55.00 EG
Property damage: 10.00K
Reported by: Law Enforcement

Several trees were downed in Pleasant View along Old Clarksville Pike and Oaklawn Road.