A cold core low moved over the area, dragging along a weak and slow moving surface low. Although weak, sufficient low level and upper forcing aided in developing strong to severe storms. Instability and shear were strong enough for a few supercell thunderstorms to develop and bring hail, strong winds, and heavy rain to the area. The storms were slow moving. which allowed some storms to anchor over locations for an extended period of time, resulting in flash flooding. Some repeated storms over the same area also led to similar results. Severe weather reports were mostly in the form of hail, as these storms produced hail very efficiently. The largest hail reported was 1.5, and there were some isolated reports of damaging winds.

Flash Flood in MUSCATINE, IOWA
From 19-AUG-22 20:05:00 to 19-AUG-22 23:59:00 (CST-6)
Location: CONESVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported that several yards and alleyways on the south side of Conesville had water up to a foot deep in them.

Hail in BENTON, IOWA
From 19-AUG-22 16:03:00 to 19-AUG-22 16:03:00 (CST-6)
Location: URBANA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MUSCATINE, IOWA
From 19-AUG-22 18:03:00 to 19-AUG-22 18:03:00 (CST-6)
Location: CONESVILLE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Amateur radio operator relayed the report from the fire chief.

Hail in MUSCATINE, IOWA
From 19-AUG-22 18:07:00 to 19-AUG-22 18:07:00 (CST-6)
Location: MUSCATINE MUNI ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MUSCATINE, IOWA
From 19-AUG-22 18:24:00 to 19-AUG-22 18:24:00 (CST-6)
Location: CONESVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in KEOKUK, IOWA
From 19-AUG-22 18:33:00 to 19-AUG-22 18:33:00 (CST-6)
Location: PEKIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported that hail has been falling for the past 10 minutes and that most of the stones were pea to nickel size.

Thunderstorm Wind in MUSCATINE, IOWA
From 19-AUG-22 18:00:00 to 19-AUG-22 18:00:00 (CST-6)
Location: CONESVILLE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Amateur radio relayed a report from law enforcement that trees were down on the north side of Conesville.

Thunderstorm Wind in JONES, IOWA
From 19-AUG-22 19:45:00 to 19-AUG-22 19:45:00 (CST-6)
Location: MORLEY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The Morely Fire Chief estimated a peak wind speed of 65 MPH. .

Thunderstorm Wind in MUSCATINE, IOWA
From 19-AUG-22 19:46:00 to 19-AUG-22 19:46:00 (CST-6)
Location: MUSCATINE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported a tree down on Fletcher Avenue. The time of the event was estimated using radar.

Thunderstorm Wind in JONES, IOWA
From 19-AUG-22 19:35:00 to 19-AUG-22 19:35:00 (CST-6)
Location: STONE CITY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported trees down and large tree branches down. The time of the event was estimated using radar. This report was received via social media.