An upper level trough pushed through the northern plains with an associated cold front extending southward into the central plains. Storms fired along the front to the west of Iowa in the evening and developed into a large MCS as it moved into Iowa. An MCV and a large squall line moved through northern and central Iowa during the overnight hours producing strong, damaging winds and heavy rain. Four brief tornadoes also occurred in central Iowa along the leading edge of the squall line in an area of stronger shear and higher moisture. The tornadoes mainly damaged trees and crops, however one did strike a barn and silo in rural Boone County. Another damaged traffic signals and an Iowa DNR nursery in the Ames area of Story County.

Thunderstorm Wind in POCAHONTAS, IOWA
From 06-JUN-15 23:42:00 to 06-JUN-15 23:42:00 (CST-6)
Location: ROLFE
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Measured on a personal weather station.

Tornado in BOONE, IOWA
From 07-JUN-15 00:15:00 to 07-JUN-15 00:18:00 (CST-6)
Location: WOLF
Tornado F-scale: EF0
Property damage: 15.00K
Crop damage: 4.00K
Reported by: NWS Employee

This small and weak tornado formed on the leading edge of a squall line and tracked quickly across fields before striking a farm, causing light to moderate tree damage and damaging a storage silo and barn.

Tornado in STORY, IOWA
From 07-JUN-15 00:41:00 to 07-JUN-15 00:43:00 (CST-6)
Location: AMES ARPT
Tornado F-scale: EF1
Property damage: 90.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed in southern Ames just south of the Highway 30 and 69 interchange damaging traffic signals at Airport Road and Duff Avenue. It tracked through an Iowa DNR nursery and heavily damaged 1/4 of a mile of pine trees along a road. The tornado weakened and moved across a soccer field complex, damaging more trees before dissipating as it reached the South Skunk River.

Thunderstorm Wind in POCAHONTAS, IOWA
From 06-JUN-15 23:41:00 to 06-JUN-15 23:41:00 (CST-6)
Location: ROLFE
Magnitude: 65.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Social Media

Four houses with tree damage and some outbuilding damage.

Heavy Rain in JASPER, IOWA
From 06-JUN-15 06:00:00 to 07-JUN-15 06:00:00 (CST-6)
Location: CLYDE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rainfall over the previous 24 hours of 2.00 inches was reported.

Heavy Rain in MARSHALL, IOWA
From 06-JUN-15 06:00:00 to 07-JUN-15 06:00:00 (CST-6)
Location: MARSHALLTOWN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Twenty-four hour rainfall of 2.03 inches was reported.

Heavy Rain in WEBSTER, IOWA
From 06-JUN-15 06:00:00 to 07-JUN-15 06:00:00 (CST-6)
Location: HARCOURT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Twenty-four hour rainfall of 2.26 inches was reported.

Heavy Rain in JASPER, IOWA
From 06-JUN-15 06:40:00 to 07-JUN-15 06:40:00 (CST-6)
Location: NEWTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Twenty-four hour rainfall of 2.01 inches was reported.

Thunderstorm Wind in CRAWFORD, IOWA
From 06-JUN-15 22:46:00 to 06-JUN-15 22:46:00 (CST-6)
Location: RICKETTS
Magnitude: 54.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

A report of large tree limbs down was relayed by the Crawford County Dispatch.

Tornado in WEBSTER, IOWA
From 07-JUN-15 00:11:00 to 07-JUN-15 00:12:00 (CST-6)
Location: BOXHOLM
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 1.00K
Reported by: NWS Storm Survey

This brief and weak tornado caused light tree damage at a farmstead before moving out into a field and dissipating. Track located in satellite imagery and verified using dual-pol radar data.

Tornado in BOONE, IOWA
From 07-JUN-15 00:18:00 to 07-JUN-15 00:20:00 (CST-6)
Location: RIDGEPORT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: NWS Storm Survey

This was a short-lived tornado that formed on the leading edge of a QLCS. It stayed in rural areas and caused some minor crop and tree damage, but did not cause any known damage to structures.

Lightning in POLK, IOWA
From 07-JUN-15 01:30:00 to 07-JUN-15 01:30:00 (CST-6)
Location: BONDURANT
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning struck a house in the early morning hours starting a fire in the garage and was soon fully engulfed in flames. The house was in a rural area of Polk County. The development also had no fire hydrants.

Thunderstorm Wind in SAC, IOWA
From 06-JUN-15 23:15:00 to 06-JUN-15 23:15:00 (CST-6)
Location: WALL LAKE
Magnitude: 65.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind damage including numerous branches down and a few trees down across southern and southwestern Sac County.

Thunderstorm Wind in CARROLL, IOWA
From 06-JUN-15 23:30:00 to 06-JUN-15 23:30:00 (CST-6)
Location: MT CARMEL
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power poles down north of Carroll along Highway 71 at 120th street.

Thunderstorm Wind in CALHOUN, IOWA
From 06-JUN-15 23:37:00 to 06-JUN-15 23:37:00 (CST-6)
Location: ROCKWELL CITY
Magnitude: 60.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Social Media

Multiple large tree branches down in and around Rockwell City.

Thunderstorm Wind in STORY, IOWA
From 07-JUN-15 00:39:00 to 07-JUN-15 00:39:00 (CST-6)
Location: AMES ARPT
Magnitude: 75.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Numerous trees up to 8 inches in diameter snapped off with larger trees uprooted. Most of the damage concentrated SW of the airport and University Ave. A stop sign was snapped off at that intersection as well.

Thunderstorm Wind in STORY, IOWA
From 07-JUN-15 00:41:00 to 07-JUN-15 00:41:00 (CST-6)
Location: AMES ARPT
Magnitude: 75.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Small sheds at the Lowes store were destroyed with numerous trees damaged. The trees were snapped off at the base.