Warm and muggy conditions were found across the region May 20 as a cold front tracked east across Iowa.  A strong line of showers and thunderstorms developed ahead of the front and impacted areas mainly between Highway 20 and Highway 30 in Iowa as well as Carroll and Jo Daviess Counties in Illinois.  Very large hail fell with the stronger storms with hail sizes as large as golf balls over Dubuque, Jackson, and Jones Counties in Iowa.  Torrential rains were also common with these storms.  Elsewhere, dry and warm conditions were found. High temperatures were in the mid to upper 80s.

Hail in JONES, IOWA
From 20-MAY-14 17:33:00 to 20-MAY-14 17:33:00 (CST-6)
Location: MONTICELLO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JONES, IOWA
From 20-MAY-14 17:32:00 to 20-MAY-14 17:32:00 (CST-6)
Location: MONTICELLO
Magnitude: 1.75 
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Golf ball sized hail fell in Monticello, IA at 532 pm CDT May 20.  The hail broke the windshield of a squad car.

Hail in JONES, IOWA
From 20-MAY-14 17:33:00 to 20-MAY-14 17:33:00 (CST-6)
Location: MONTICELLO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell about 2 miles west of Monticello, IA around 633 pm CDT May 20.

Hail in JONES, IOWA
From 20-MAY-14 17:35:00 to 20-MAY-14 17:35:00 (CST-6)
Location: MONTICELLO
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ping pong ball sized hail fell about 1 mile north northwest of Monticello, IA around 635 pm CDT May 20.

Hail in DUBUQUE, IOWA
From 20-MAY-14 16:44:00 to 20-MAY-14 16:44:00 (CST-6)
Location: CASCADE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Golf ball sized hail fell in Cascade, IA at 544 pm CDT May 20.

Hail in JACKSON, IOWA
From 20-MAY-14 16:30:00 to 20-MAY-14 16:30:00 (CST-6)
Location: ST DONATUS
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Two inch diameter hail fell in St. Donatus, IA around 530 pm CDT May 20.

Hail in DUBUQUE, IOWA
From 20-MAY-14 16:46:00 to 20-MAY-14 16:46:00 (CST-6)
Location: FILLMORE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Golf ball sized hail fell at the Fillmore Fairways Golf Course in Fillmore, IA at 546 pm CDT May 20.

Hail in JONES, IOWA
From 20-MAY-14 17:30:00 to 20-MAY-14 17:30:00 (CST-6)
Location: MONTICELLO MUNI ARPT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Half dollar sized hail fell about 3 miles northeast of Monticello, IA around 630 pm CDT May 20.

Hail in BENTON, IOWA
From 20-MAY-14 15:30:00 to 20-MAY-14 15:30:00 (CST-6)
Location: GARRISON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BENTON, IOWA
From 20-MAY-14 15:36:00 to 20-MAY-14 15:36:00 (CST-6)
Location: URBANA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail fell in Urbana, IA around 436 pm CDT May 20.

Hail in BENTON, IOWA
From 20-MAY-14 15:45:00 to 20-MAY-14 15:45:00 (CST-6)
Location: URBANA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DUBUQUE, IOWA
From 20-MAY-14 15:50:00 to 20-MAY-14 15:50:00 (CST-6)
Location: (DBQ)DUBUQUE MUNI AR
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Ping pong ball sized hail fell 1 mile east of the Dubuque, IA Airport around 450 pm CDT May 20.

Hail in DUBUQUE, IOWA
From 20-MAY-14 15:55:00 to 20-MAY-14 15:55:00 (CST-6)
Location: (DBQ)DUBUQUE MUNI AR
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Golf ball sized hail fell about 1 mile east of the Dubuque, IA Airport along Olde Davenport Road around 455 pm CDT May 20.

Hail in LINN, IOWA
From 20-MAY-14 16:00:00 to 20-MAY-14 16:00:00 (CST-6)
Location: ALBURNETT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell about 6 miles west of Central City, IA around 500 pm CDT May 20.

Hail in LINN, IOWA
From 20-MAY-14 16:06:00 to 20-MAY-14 16:06:00 (CST-6)
Location: PARIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell about 4 miles west of Central City, IA at 506 pm CDT May 20.

Hail in DUBUQUE, IOWA
From 20-MAY-14 16:28:00 to 20-MAY-14 16:28:00 (CST-6)
Location: CASCADE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Ping pong ball sized hail fell about 1 mile north of Cascade, IA near Macomber Road at 528 pm CDT May 20.

Hail in LINN, IOWA
From 20-MAY-14 18:32:00 to 20-MAY-14 18:32:00 (CST-6)
Location: ALBURNETT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Quarter sized hail fell about 3 miles north of Alburnett, IA around 732 pm CDT May 20.

Hail in LINN, IOWA
From 20-MAY-14 18:34:00 to 20-MAY-14 18:34:00 (CST-6)
Location: LAFAYETTE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINN, IOWA
From 20-MAY-14 18:39:00 to 20-MAY-14 18:39:00 (CST-6)
Location: CENTER PT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JACKSON, IOWA
From 20-MAY-14 19:00:00 to 20-MAY-14 19:00:00 (CST-6)
Location: SPRINGBROOK
Magnitude: 1.75 
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Golf ball hail fell in Springbrook, IA around 800 pm CDT May 20.  The hail damaged a squad car.

Hail in JONES, IOWA
From 20-MAY-14 19:20:00 to 20-MAY-14 19:20:00 (CST-6)
Location: MARTELLE
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Half dollar sized hail fell in Martelle, IA around 820 pm CDT May 20 damaging some vehicles.

Hail in JACKSON, IOWA
From 20-MAY-14 19:23:00 to 20-MAY-14 19:23:00 (CST-6)
Location: SABULA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball sized hail fell in Sabula, IA at 823 pm CDT May 20.

Hail in JONES, IOWA
From 20-MAY-14 19:20:00 to 20-MAY-14 19:20:00 (CST-6)
Location: MARTELLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell about 1 mile north of Martelle, IA around 820 pm CDT May 20.

Hail in JONES, IOWA
From 20-MAY-14 19:35:00 to 20-MAY-14 19:35:00 (CST-6)
Location: OLIN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ping pong ball sized hail fell about 1 mile west of Olin, IA at 835 pm CDT May 20.

Thunderstorm Wind in LINN, IOWA
From 20-MAY-14 23:07:00 to 20-MAY-14 23:07:00 (CST-6)
Location: (CID)CEDAR RAPIDS AR
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A 59 mph wind gust was recorded by the Cedar Rapids ASOS at the Cedar Rapids, IA Airport at 1207 am CDT May 21.

Hail in SCOTT, IOWA
From 21-MAY-14 01:00:00 to 21-MAY-14 01:00:00 (CST-6)
Location: CREDIT ISLAND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MUSCATINE, IOWA
From 21-MAY-14 00:40:00 to 21-MAY-14 00:40:00 (CST-6)
Location: STOCKTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated to be 60 mph were observed about 2 miles west of Walcott, IA at 140 am CDT May 21.

Hail in SCOTT, IOWA
From 21-MAY-14 01:00:00 to 21-MAY-14 01:00:00 (CST-6)
Location: DAVENPORT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in LINN, IOWA
From 20-MAY-14 18:30:00 to 20-MAY-14 18:30:00 (CST-6)
Location: LAFAYETTE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DUBUQUE, IOWA
From 20-MAY-14 15:40:00 to 20-MAY-14 15:40:00 (CST-6)
Location: (DBQ)DUBUQUE MUNI AR
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager