Discrete supercell thunderstorms developed during the late afternoon hours across North Central Texas.  These storms moved eastward into Northeast Texas during the late evening and overnight hours of the 18th.  By the time the storms moved into Northeast Texas, the storms had evolved into a broken line of storms...producing damaging wind gusts and large hail.  Despite relatively weak instability, the storms propagated eastward along a cold pool the developed out ahead of the storms.

Hail in SMITH, TEXAS
From 18-APR-15 20:33:00 to 18-APR-15 20:33:00 (CST-6)
Location: NOONDAY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Nickel size hail reported in Noonday, Texas.

Thunderstorm Wind in SMITH, TEXAS
From 18-APR-15 20:34:00 to 18-APR-15 20:34:00 (CST-6)
Location: KIRKPATRICK ADDITION
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were downed along Greenbriar Road west of Tyler, Texas.

Hail in SMITH, TEXAS
From 18-APR-15 20:36:00 to 18-APR-15 20:36:00 (CST-6)
Location: TYLER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Golf ball sized hail reported west of Tyler Pounds Field Airport.

Hail in SMITH, TEXAS
From 18-APR-15 21:02:00 to 18-APR-15 21:02:00 (CST-6)
Location: BULLARD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Golf ball sized hail reported in Bullard, Texas.

Thunderstorm Wind in SMITH, TEXAS
From 18-APR-15 21:39:00 to 18-APR-15 21:39:00 (CST-6)
Location: TYLER
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were downed on the west side of Tyler, Texas.

Thunderstorm Wind in RUSK, TEXAS
From 18-APR-15 22:20:00 to 18-APR-15 22:20:00 (CST-6)
Location: SEXTON CITY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Numerous trees downed in the New London, Texas area.

Thunderstorm Wind in RUSK, TEXAS
From 18-APR-15 22:20:00 to 18-APR-15 22:20:00 (CST-6)
Location: LANEVILLE
Magnitude: 53.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large tree was downed across FM. 225 in the Laneville area west northwest of Mount Enterprise, Texas.

Hail in RUSK, TEXAS
From 18-APR-15 22:33:00 to 18-APR-15 22:33:00 (CST-6)
Location: HENDERSON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime size hail reported at the intersection of Hwy. 259 and Hwy. 79.

Flash Flood in RUSK, TEXAS
From 18-APR-15 22:45:00 to 18-APR-15 23:45:00 (CST-6)
Location: OLD LONDON
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

County Road 111 was washed out in the New London community.  A vehicle fell into the washout area of the roadway but they were evacuated from their vehicle.

Thunderstorm Wind in RUSK, TEXAS
From 18-APR-15 22:50:00 to 18-APR-15 22:50:00 (CST-6)
Location: PINEHILL
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were downed across the road at the intersection of FM. 1798 and FM. 348 in the Pinehill community.

Flash Flood in SMITH, TEXAS
From 18-APR-15 23:05:00 to 18-APR-15 23:30:00 (CST-6)
Location: GALILEE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous county roads were flooded in and around the Flint community.  Greenbriar Road was flooded and closed as well.