A low pressure center located along the Kansas-Nebraska border during the morning of the 19th moved ENE toward and through Iowa that evening and overnight. Generally, two areas of storms initiated, one along the cold front through west-central and central Iowa and another further north along and ahead of the warm front.  MUCAPE values within the warm sector were modest in the 1000-2000 J/kg range.  Effective bulk shear was also supportive of sustaining updrafts, with values in the 40 to 60kt neighborhood.  The resulting storms primarily produced a tornado report back in west central Iowa and heavy rainfall and severe wind reports through parts of central and northern Iowa.  Damage reports were not associated with the warm front storms in the morning and early afternoon, instead they were associated with the cold front initiated storms during the evening hours.

Thunderstorm Wind in BUTLER, IOWA
From 19-APR-17 21:13:00 to 19-APR-17 21:13:00 (CST-6)
Location: SHELL ROCK
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Public reported 8 trees downed by strong winds.  Report relayed by NWS employee.  Time radar estimated.

Thunderstorm Wind in BREMER, IOWA
From 19-APR-17 21:19:00 to 19-APR-17 21:19:00 (CST-6)
Location: WAVERLY MUNI ARPT
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Public reported a large tree and flag pole downed.

Thunderstorm Wind in BREMER, IOWA
From 19-APR-17 21:24:00 to 19-APR-17 21:24:00 (CST-6)
Location: BREMER
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported storage shed damaged.  This is a delayed report.

Thunderstorm Wind in GREENE, IOWA
From 19-APR-17 19:33:00 to 19-APR-17 19:33:00 (CST-6)
Location: SCRANTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported estimated 60 mph winds along with pea size hail and water ponding in the streets.

Thunderstorm Wind in BOONE, IOWA
From 19-APR-17 20:25:00 to 19-APR-17 20:25:00 (CST-6)
Location: BOONE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Public reported estimated 60 mph winds along with tree limbs down.

Thunderstorm Wind in BUTLER, IOWA
From 19-APR-17 21:05:00 to 19-APR-17 21:05:00 (CST-6)
Location: CLARKSVILLE
Magnitude: 53.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Public reported estimated 60 plus mph winds and trees down. Report relayed by NWS employee.  Time radar estimated.

Hail in POCAHONTAS, IOWA
From 19-APR-17 18:35:00 to 19-APR-17 18:35:00 (CST-6)
Location: PALMER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported pea to nickel size hail in Palmer.

Heavy Rain in BOONE, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: OGDEN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Official NWS rain gage report of 1.00 inches over the last 24 hours.

Heavy Rain in CARROLL, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: HALBUR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported heavy rainfall of 1.80 inches.

Hail in BOONE, IOWA
From 19-APR-17 20:25:00 to 19-APR-17 20:25:00 (CST-6)
Location: BOONE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported up to nickel sized hail.

Heavy Rain in CARROLL, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: MANNING
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported heavy rainfall of 1.24 inches.

Heavy Rain in CARROLL, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: CARROLL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Carroll AWOS reported heavy rainfall of 1.08 inches.

Heavy Rain in CERRO GORDO, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: CLEAR LAKE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

KAAL TV relayed public report of heavy rainfall of 1.50 inches.

Heavy Rain in CERRO GORDO, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: MASON CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

KIMT reported heavy rainfall of 1.36 inches over the last 24 hours.

Heavy Rain in CERRO GORDO, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: (MCW)MASON CITY MUNI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Mason City ASOS reported heavy rainfall of 1.17 inches over the last 24 hours.

Heavy Rain in CERRO GORDO, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: MASON CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Mason City Coop observer reported heavy rainfall of 1.48 inches over the last 24 hours.

Heavy Rain in CRAWFORD, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: DENISON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 1.11 inches over the last 24 hours.

Heavy Rain in HANCOCK, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: BRITT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 1.10 inches over the last 24 hours.

Heavy Rain in SAC, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: SAC CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 1.35 inches over the last 24 hours.

Heavy Rain in STORY, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: STORY CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

NWS rain gage recorded heavy rainfall of 1.10 inches over the last 24 hours.

Heavy Rain in WINNEBAGO, IOWA
From 19-APR-17 06:00:00 to 20-APR-17 06:00:00 (CST-6)
Location: LAKE MILLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop observer reported heavy rainfall of 1.14 inches over the last 24 hours.

Thunderstorm Wind in HAMILTON, IOWA
From 19-APR-17 20:24:00 to 19-APR-17 20:24:00 (CST-6)
Location: RANDALL
Magnitude: 56.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: County Official

Iowa DOT and Hamilton County dispatch reported downed power lines and power poles over Highway 69 south of Jewell.

Thunderstorm Wind in BUTLER, IOWA
From 19-APR-17 20:59:00 to 19-APR-17 20:59:00 (CST-6)
Location: ALLISON
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Public reported tree damage, with extent unknown at the time.  Relayed by an NWS employee.  Time radar estimated.

Thunderstorm Wind in BUTLER, IOWA
From 19-APR-17 21:08:00 to 19-APR-17 21:08:00 (CST-6)
Location: CLARKSVILLE
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Public reported large tree down along with partial roof removed from a Morton building. Relayed by NWS employee.  Time radar estimated.

Thunderstorm Wind in BREMER, IOWA
From 19-APR-17 21:13:00 to 19-APR-17 21:13:00 (CST-6)
Location: WAVERLY MUNI ARPT
Magnitude: 52.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported a 30 foot camper tipped over by strong winds.  This is a delayed report.