Thunderstorms developed along a surface boundary across Nebraska and into western Iowa in the pre-dawn early morning hours of July 11th. The storms had well established cold pools as they moved into Iowa and an area of favorable MUCAPE which helped to sustain the convection. Storms produced over 70 mph in western Iowa, weakening some into central Iowa with sub-severe wind gusts by the time the storms reached eastern Iowa.

Thunderstorm Wind in CRAWFORD, IOWA
From 11-JUL-22 02:37:00 to 11-JUL-22 02:37:00 (CST-6)
Location: DENISON MUNI ARPT
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in CRAWFORD, IOWA
From 11-JUL-22 02:40:00 to 11-JUL-22 02:40:00 (CST-6)
Location: DENISON
Magnitude: 57.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Scanner traffic indicated lots of trees down in Denison. Time estimated.

Thunderstorm Wind in CARROLL, IOWA
From 11-JUL-22 03:05:00 to 11-JUL-22 03:05:00 (CST-6)
Location: CARROLL NEU ARPT
Magnitude: 69.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in GREENE, IOWA
From 11-JUL-22 03:18:00 to 11-JUL-22 03:18:00 (CST-6)
Location: FARLIN
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Personal weather station recorded 64 mph gust.

Thunderstorm Wind in CARROLL, IOWA
From 11-JUL-22 02:59:00 to 11-JUL-22 02:59:00 (CST-6)
Location: CARROLL
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Personal weather station recorded 66 mph gust.

Thunderstorm Wind in GREENE, IOWA
From 11-JUL-22 03:20:00 to 11-JUL-22 03:20:00 (CST-6)
Location: JEFFERSON
Magnitude: 55.00 EG
Crop damage: 0.00K
Reported by: Broadcast Media

Damage to gas station canopy with partial collapse of structure. Report from KCCI TV.

Thunderstorm Wind in GREENE, IOWA
From 11-JUL-22 03:20:00 to 11-JUL-22 03:20:00 (CST-6)
Location: DANA
Magnitude: 55.00 EG
Crop damage: 0.00K
Reported by: Broadcast Media

Tree damage at Spring Lake Park with some vehicles and campers stuck under trees. Delayed report, time estimated via radar.

Thunderstorm Wind in GREENE, IOWA
From 11-JUL-22 03:24:00 to 11-JUL-22 03:24:00 (CST-6)
Location: JEFFERSON MUNI ARPT
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A personal weather station recorded a 66 mph gust.

Thunderstorm Wind in GREENE, IOWA
From 11-JUL-22 03:34:00 to 11-JUL-22 03:34:00 (CST-6)
Location: JEFFERSON
Magnitude: 55.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Trees down and power out in Jefferson.

Thunderstorm Wind in GREENE, IOWA
From 11-JUL-22 03:46:00 to 11-JUL-22 03:46:00 (CST-6)
Location: JEFFERSON
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in BOONE, IOWA
From 11-JUL-22 03:47:00 to 11-JUL-22 03:47:00 (CST-6)
Location: BOONE MUNI ARPT
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in BOONE, IOWA
From 11-JUL-22 03:49:00 to 11-JUL-22 03:49:00 (CST-6)
Location: BERKLEY
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A personal weather station recorded a 59 mph gust.

Thunderstorm Wind in STORY, IOWA
From 11-JUL-22 04:03:00 to 11-JUL-22 04:03:00 (CST-6)
Location: ZEARING
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An 18 inch diameter tree snapped. Image posted on social media, time estimated via radar.

Thunderstorm Wind in STORY, IOWA
From 11-JUL-22 04:05:00 to 11-JUL-22 04:05:00 (CST-6)
Location: AMES ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in STORY, IOWA
From 11-JUL-22 04:08:00 to 11-JUL-22 04:08:00 (CST-6)
Location: ONTARIO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Large tree limbs down in west Ames. Relayed by Broadcast media.