A mesoscale convective system moved east-southeast from southern Illinois into southwest Indiana. The complex transitioned from a continuous line of storms to a more discrete storm mode, with two distinct supercells. The supercell over southwest Indiana produced three tornadoes along its track across Vanderburgh, Warrick, and Spencer Counties. The storms encountered a moderately unstable air mass and sufficient deep-layer wind shear for storm organization. Mixed-layer capes around 1000 to 1500 j/kg were supported by temperatures in the upper 70's and dew points in the lower 60's. This instability, coupled with effective wind shear near 40 knots, supported supercell activity with tornadoes.

Hail in WARRICK, INDIANA
From 07-APR-15 14:00:00 to 07-APR-15 14:00:00 (CST-6)
Location: TENNYSON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WARRICK, INDIANA
From 07-APR-15 13:44:00 to 07-APR-15 13:55:00 (CST-6)
Location: BOONVILLE
Magnitude: 74.00 EG
Property damage: 105.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A microburst containing winds estimated near 85 mph tracked north and northeast of Boonville. More than a dozen homes and other structures lost shingles or pieces of siding. Dozens of trees were uprooted. Many tree limbs were blown down. The microburst was about one mile wide on average.

Heavy Rain in SPENCER, INDIANA
From 07-APR-15 14:10:00 to 07-APR-15 14:10:00 (CST-6)
Location: CHRISNEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Rainfall of 1.40 inches was measured in 30 minutes.

Tornado in VANDERBURGH, INDIANA
From 07-APR-15 13:20:00 to 07-APR-15 13:28:00 (CST-6)
Location: DARMSTADT
Tornado F-scale: EF1
Property damage: 400.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado touched down just west of U.S. Highway 41 and then moved south of due east. Power poles were broken along U.S. Highway 41. At least three farm machinery sheds and garages were destroyed. Three grain bins were destroyed. Numerous other small structures were overturned or destroyed. One home had major structural damage, including an exterior wall pushed outward. The exterior wall was on the end of the house with an attached garage. Dozens of homes lost shingles or gutters. Many dozens of trees were uprooted or snapped. A semi was overturned at the Interstate 164 junction with State Route 57. Peak winds were estimated near 110 mph. The average path width was 325 yards. The majority of damage occurred in Vanderburgh County. This tornado continued into Warrick County.

Thunderstorm Wind in SPENCER, INDIANA
From 07-APR-15 14:05:00 to 07-APR-15 14:05:00 (CST-6)
Location: CHRISNEY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated a wind gust to 70 mph in Lamar. In Chrisney, tree branches were broken by winds estimated near 60 mph.

Tornado in WARRICK, INDIANA
From 07-APR-15 13:28:00 to 07-APR-15 13:33:00 (CST-6)
Location: ELBERFELD
Tornado F-scale: EF1
Property damage: 30.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado continued from Vanderburgh County. The majority of the damage with this tornado occurred in Vanderburgh County. Most of the damage path in Warrick County was through rural areas. A few homes lost shingles and gutters.  Dozens of trees were uprooted or snapped. The average path width was 325 yards. Peak winds were estimated near 110 mph.

Tornado in WARRICK, INDIANA
From 07-APR-15 13:47:00 to 07-APR-15 13:50:00 (CST-6)
Location: TENNYSON
Tornado F-scale: EF1
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Maximum winds were estimated near 95 mph. One barn was destroyed, and several other barns sustained major roof damage. A garage lost its roof. Several trees were blown down. The funnel was sighted from Tennyson by a trained spotter.

Thunderstorm Wind in SPENCER, INDIANA
From 07-APR-15 14:12:00 to 07-APR-15 14:12:00 (CST-6)
Location: NEW BOSTON
Magnitude: 52.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Public

Trees were down on a house.

Tornado in WARRICK, INDIANA
From 07-APR-15 13:54:00 to 07-APR-15 13:56:00 (CST-6)
Location: TENNYSON
Tornado F-scale: EF1
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado began along the eastern edge of Warrick County. Peak winds were estimated near 95 mph. Some trees were damaged. Most of the damage occurred during the Spencer County portion of the track. This tornado continued into Spencer County.

Tornado in SPENCER, INDIANA
From 07-APR-15 13:56:00 to 07-APR-15 14:00:00 (CST-6)
Location: PIGEON
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado continued from Warrick County. Numerous trees and limbs were blown down, including some large trees that were snapped or uprooted. Peak winds were estimated near 95 mph.

Hail in VANDERBURGH, INDIANA
From 07-APR-15 13:28:00 to 07-APR-15 13:28:00 (CST-6)
Location: DARMSTADT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in SPENCER, INDIANA
From 07-APR-15 14:13:00 to 07-APR-15 14:13:00 (CST-6)
Location: ROCKPORT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WARRICK, INDIANA
From 07-APR-15 14:00:00 to 07-APR-15 14:00:00 (CST-6)
Location: TENNYSON
Magnitude: 58.00 MG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous large tree limbs were down. A trained spotter measured a wind gust to 67 mph before the wind equipment was ripped off its pole.