A small complex of thunderstorms traveled northeast through Kansas and Nebraska overnight the 22nd into the 23rd, finally arriving early in the afternoon.  With instability building with daytime heating, the storms were able to strengthen and grow in spatial coverage as they traversed northwest/northern Iowa.  While no severe reports were made with the initial storms, heavy rainfall was reported.  Later in the day, as a cold front approached, more storms were able to initiate and provide additional heavy rainfall as well as a couple of damaging wind reports.  Most reports resided across northern Iowa, while the damaging winds occurred during the evening more towards southern Iowa.

Flash Flood in WORTH, IOWA
From 24-AUG-16 00:30:00 to 24-AUG-16 05:00:00 (CST-6)
Location: HANLONTOWN
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported a 1 mile stretch along 390th street near the intersection of Grouse Ave and 390th St closed and blocked off due to water over the road.  Time estimated by radar.  Delayed report.

Thunderstorm Wind in MAHASKA, IOWA
From 24-AUG-16 18:14:00 to 24-AUG-16 18:14:00 (CST-6)
Location: BARNES CITY
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported several tree limbs upwards of 8 inches in diameter downed. Additionally, a hollowed out 15 to 20 inch diameter tree downed. Over 1 inch of rainfall reported in half an hour as well.

Heavy Rain in POCAHONTAS, IOWA
From 23-AUG-16 14:37:00 to 23-AUG-16 15:37:00 (CST-6)
Location: PLOVER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported storm total heavy rainfall of 3.10 inches. Times radar estimated, with duration around 1 hour.

Heavy Rain in PALO ALTO, IOWA
From 23-AUG-16 14:45:00 to 23-AUG-16 16:00:00 (CST-6)
Location: EMMETSBURG ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 1.44 inches between 3:45 and 5:00 pm.

Heavy Rain in FRANKLIN, IOWA
From 23-AUG-16 16:30:00 to 23-AUG-16 21:05:00 (CST-6)
Location: ALEXANDER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported heavy rainfall of 3.80 inches storm total so far.

Heavy Rain in FRANKLIN, IOWA
From 23-AUG-16 16:30:00 to 23-AUG-16 17:45:00 (CST-6)
Location: ALEXANDER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported storm total heavy rainfall of 3.2 inches. Ending time radar estimated.

Heavy Rain in CERRO GORDO, IOWA
From 23-AUG-16 16:30:00 to 23-AUG-16 21:40:00 (CST-6)
Location: MASON CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

KIMT TV recorded heavy rainfall of 1.71 inches storm total.

Heavy Rain in WORTH, IOWA
From 23-AUG-16 16:30:00 to 24-AUG-16 01:00:00 (CST-6)
Location: GRAFTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported heavy rainfall of 3.88 inches since early Tue evening.

Heavy Rain in WORTH, IOWA
From 23-AUG-16 16:15:00 to 24-AUG-16 00:30:00 (CST-6)
Location: NORTHWOOD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported storm total heavy rainfall of 4.55 inches. End time radar estimated.

Heavy Rain in WINNEBAGO, IOWA
From 23-AUG-16 15:30:00 to 24-AUG-16 00:00:00 (CST-6)
Location: LAKE MILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Coop observer reported storm total heavy rainfall of 3.53 inches.

Heavy Rain in ADAMS, IOWA
From 23-AUG-16 23:00:00 to 24-AUG-16 02:00:00 (CST-6)
Location: CORNING
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported storm total heavy rainfall of 2.35 inches.

Thunderstorm Wind in MAHASKA, IOWA
From 24-AUG-16 18:08:00 to 24-AUG-16 18:08:00 (CST-6)
Location: OSKALOOSA ROTH ARPT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported wind gusts of 50-60 mph.