A cluster of thunderstorms developed over northwest to west central Iowa late in the evening of June 16th, strengthening on the nose of warm air advection and the low level jet. The initial discrete cell was able to produce up to ping pong balled sized hail. As the cluster developed further into a small bowing segment, damaging wind gusts became more prevalent.

Thunderstorm Wind in SAC, IOWA
From 16-JUN-21 20:09:00 to 16-JUN-21 20:19:00 (CST-6)
Location: SCHALLER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of 60 mph winds accompanied by 10 minutes of hail from pea to dime sized.

Thunderstorm Wind in SAC, IOWA
From 16-JUN-21 20:15:00 to 16-JUN-21 20:15:00 (CST-6)
Location: SCHALLER
Magnitude: 54.00 EG
Crop damage: 0.00K
Reported by: NWS Employee

Numerous three to six inch tree limbs were downed across Schaller with one twelve inch diameter branch snapped off. Power was out for some time. Time estimated via radar.

Hail in SAC, IOWA
From 16-JUN-21 20:16:00 to 16-JUN-21 20:16:00 (CST-6)
Location: SCHALLER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Dim to quarter sized hail laying on the ground behind the storm at US Highway 20 and Highway 110. Time estimated via radar.

Hail in SAC, IOWA
From 16-JUN-21 20:18:00 to 16-JUN-21 20:18:00 (CST-6)
Location: SCHALLER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported ping pong ball sized hail.

Hail in SAC, IOWA
From 16-JUN-21 20:24:00 to 16-JUN-21 20:24:00 (CST-6)
Location: SCHALLER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report via mPING of penny sized hail.

Thunderstorm Wind in SAC, IOWA
From 16-JUN-21 20:30:00 to 16-JUN-21 20:30:00 (CST-6)
Location: ODEBOLT
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a healthy thirteen inch diameter tree limb down. Time estimated via radar.

Thunderstorm Wind in SAC, IOWA
From 16-JUN-21 20:34:00 to 16-JUN-21 20:34:00 (CST-6)
Location: ODEBOLT
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The fire department reported numerous twelve to sixteen inch diameter tree limbs down throughout Odeboldt, blocking roads and knocking out power. A few of the limbs were reported to have rotten centers.

Thunderstorm Wind in CARROLL, IOWA
From 16-JUN-21 21:17:00 to 16-JUN-21 21:17:00 (CST-6)
Location: TEMPLETON
Magnitude: 54.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a large tree down on a house and garage while also pulling down power lines. Other two to six inch diameter branches down and a flag pole blown over.

Thunderstorm Wind in CARROLL, IOWA
From 16-JUN-21 21:19:00 to 16-JUN-21 21:19:00 (CST-6)
Location: WILEY
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Personal weather station KIACARRO16 reported a 62 mph gust.

Thunderstorm Wind in AUDUBON, IOWA
From 16-JUN-21 21:19:00 to 16-JUN-21 21:19:00 (CST-6)
Location: FISCUS
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Personal weather station KIAMANNI6 reported a 60 mph wind gust.

Thunderstorm Wind in CRAWFORD, IOWA
From 16-JUN-21 21:32:00 to 16-JUN-21 21:32:00 (CST-6)
Location: ASTOR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed, blocking Iowa Highway 141 west of US Highway 59.

High Wind in EMMET, IOWA
From 16-JUN-21 22:52:00 to 16-JUN-21 22:52:00 (CST-6)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Strong wind gust occurred behind thunderstorms, in what was likely a wake low scenario.

Thunderstorm Wind in CARROLL, IOWA
From 16-JUN-21 21:02:00 to 16-JUN-21 21:02:00 (CST-6)
Location: CARROLL
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A personal weather station KIACARRO21 recorded a 59 mph gust.