Scattered showers and thunderstorms moved across portions of eastern Iowa the evening of April 15, as a cold front pushed east across Iowa. Large hail, heavy downpours, and frequent lightning were common as the storms moved across the area. A tornado was also confirmed from a strong storm that moved across Jones County, which produced damage to trees and farm outbuildings.  Rainfall amounts ranged from 1 to 3 inches across the area with the heaviest falling in Benton, Linn, Johnson, and Clinton Counties.  The heavy rain lead to flash flooding in parts of Linn County.

Hail in CLINTON, IOWA
From 15-APR-17 17:20:00 to 15-APR-17 17:20:00 (CST-6)
Location: GRAND MOUND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

This report was relayed by local broadcast media (KWQC). The time of the event was estimated using radar.

Hail in CLINTON, IOWA
From 15-APR-17 17:33:00 to 15-APR-17 17:33:00 (CST-6)
Location: DEWITT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in WASHINGTON, IOWA
From 15-APR-17 16:23:00 to 15-APR-17 16:23:00 (CST-6)
Location: RIVERSIDE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLINTON, IOWA
From 15-APR-17 17:11:00 to 15-APR-17 17:11:00 (CST-6)
Location: CALAMUS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

This report was relayed via broadcast media (KWQC). The time of the event was estimated using radar.

Hail in BENTON, IOWA
From 15-APR-17 18:38:00 to 15-APR-17 18:38:00 (CST-6)
Location: SHELLSBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The time of the event was estimated using radar.

Hail in BENTON, IOWA
From 15-APR-17 19:53:00 to 15-APR-17 19:53:00 (CST-6)
Location: BELLE PLAINE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in KEOKUK, IOWA
From 15-APR-17 15:58:00 to 15-APR-17 15:58:00 (CST-6)
Location: WEBSTER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The local fire department reported lots of pea to dime size hail.

Hail in BENTON, IOWA
From 15-APR-17 19:13:00 to 15-APR-17 19:13:00 (CST-6)
Location: SHELLSBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A public report and photo was sent in via twitter.  The time of the event was estimated using radar.

Funnel Cloud in LINN, IOWA
From 15-APR-17 19:24:00 to 15-APR-17 19:24:00 (CST-6)
Location: COGGON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The fire department reported a possible funnel cloud seen during a lightning strike.

Flash Flood in LINN, IOWA
From 15-APR-17 21:33:00 to 15-APR-17 23:59:00 (CST-6)
Location: CEDAR RAPIDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported that several vehicles were stalled on area streets int he city with water over the street. The water was unable to drain properly due to the the intense downpours. Trained spotters in the area reported 3 to 4 inches of rain.

Hail in BENTON, IOWA
From 15-APR-17 19:29:00 to 15-APR-17 19:29:00 (CST-6)
Location: BELLE PLAINE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in JONES, IOWA
From 15-APR-17 19:50:00 to 15-APR-17 19:55:00 (CST-6)
Location: AMBER
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 10.00K
Reported by: NWS Storm Survey

An EF-1 tornado began around 850 PM CDT on Saturday evening, approximately 4 miles northeast of Anamosa. The tornado tracked 3.22 miles to the east before lifting.  The tornado was 25 yards wide with estimated peak winds of 100 MPH. Damage was to trees and outbuilding along the path.

Hail in CLINTON, IOWA
From 15-APR-17 17:30:00 to 15-APR-17 17:30:00 (CST-6)
Location: DEWITT
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An off duty NWS employee reported 1.50 inch hail.  Time of the event was estimated using radar.

Hail in KEOKUK, IOWA
From 15-APR-17 18:05:00 to 15-APR-17 18:05:00 (CST-6)
Location: KESWICK
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

This report was relayed by local broadcast media (KCRG).  Time of the event was estimated using radar.

Hail in CLINTON, IOWA
From 15-APR-17 17:35:00 to 15-APR-17 17:35:00 (CST-6)
Location: DEWITT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in WASHINGTON, IOWA
From 15-APR-17 17:03:00 to 15-APR-17 17:03:00 (CST-6)
Location: KALONA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported many hailstones the size of nickles with a few stones the size of quarters that were intermixed.

Hail in WASHINGTON, IOWA
From 15-APR-17 17:05:00 to 15-APR-17 17:05:00 (CST-6)
Location: KALONA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter