The synoptic situation was very similar to what it was the previous day.  A complex weather situation was in place due to the convection from the previous night.  An outflow boundary extended east to west across northern Missouri.  The synoptic frontal boundary extended from central Nebraska across northern Iowa.  The air was clear over Iowa during the day, allowing for temperatures to recover.  Dew point values also recovered quite rapidly with readings in the upper 60s to low 70s by the late afternoon hours.  Lifted indices dropped into the -5 to -10 C. range by evening with CAPE values approaching 5000 J/kg.  By the evening hours, the frontal boundary and outflow boundary had converged and were located along Interstate 80.  Explosive thunderstorm development took place during the very late afternoon and evening hours in spite of the weak shear profile.  Discrete supercells formed in a narrow line along Interstate 80 from near Des Moines on west.  The storms became tornadic quickly.  To add insult to injury, a strong thunderstorm complex formed over Nebraska and moved east along the line of convection over Iowa.  As the event took shape, all modes of severe weather occurred.  The storms developed so rapidly that there was little more than a half hour from the first hail and wind report to the first tornado touchdown.  Hail and high wind reports were too numerous to mention individually here.  Numerous reports of golf ball size hail were received.  Boone and Story Counties reported some of the largest hail with the event as baseball size hail pelted the are.  There was one report of very large hail northwest of Slater in Story County.  Hail five and one half inches in diameter punched 8 holes through a steel roof.  There was severe house siding and roof damage in the area.  There were numerous tornadoes, especially in the central Iowa Iowa.  At one point there were several supercells around the metropolitan Des Moines area.  Two of the stronger tornadoes touched down west and south of Des Moines.  Fortunately, most of the tornado tracks were over open areas and resulted in little damage.  High winds became a problem, especially after sunset, as the complex from Nebraska moved in.  The system became more of a derecho during the late night hours.  Eighty plus MPH winds pelted southwest Iowa and downed barns and several buildings in Adams and Cass Counties.  A beta bow element formed in central Iowa shortly before midnight.  The bow echo produced a measured wind gust of 106 MPH in northern Warren County.  The high winds continued to push east along Interstate 80 for the next hour or so before it started to weaken.  The other major problem was with heavy rain.  The convection from the previous night set the stage by saturating soils.  The echos trained for several hours across central Iowa with very heavy rainfall.  Rainfall rates of 4 to 5 inches per hour were common under the heavier cells.  Several locations received 2 to 5 inch rainfalls in under  two hours, resulting in widespread flash flooding.  Reports of major highways being inundated by water were common.  By the end of the night, a swath of 4 to 9 inch rainfall was evident north of Interstate 80.  Longer term river flooding became a major problem by the morning of the 23rd.  There were two lightning related injuries.  Two people were injured when they were struck by lightning out of doors in Nevada.  The lightning struck close by as they were carrying groceries into their home.  The jolt caused them to fall, resulting in laceration to the head.

Tornado in DALLAS, IOWA
From 22-MAY-04 18:55:00 to 22-MAY-04 19:01:00 (CST)
Location: ADEL
Tornado F-scale: F1
Property damage: 2K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Tornado tracked through open fields for the most part.  It also lifted from time to time.

Flash Flood in STORY, IOWA
From 22-MAY-04 18:58:00 to 22-MAY-04 23:15:00 (CST)
Location: COUNTYWIDE
Property damage: 250K
Crop damage: 50K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in MADISON, IOWA
From 22-MAY-04 22:30:00 to 22-MAY-04 22:30:00 (CST)
Location: WINTERSET
Magnitude: 87 EG
Property damage: 75K
Crop damage: 10K
Reported by: LAW ENFORCEMENT

Tornado in ADAIR, IOWA
From 22-MAY-04 22:33:00 to 22-MAY-04 22:33:00 (CST)
Location: ADAIR
Tornado F-scale: F0
Reported by: LAW ENFORCEMENT

Brief touchdown in open area near Adair.

Thunderstorm Wind in RINGGOLD, IOWA
From 22-MAY-04 22:37:00 to 22-MAY-04 22:37:00 (CST)
Location: MT AYR
Magnitude: 65 EG
Property damage: 10K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in TAYLOR, IOWA
From 22-MAY-04 22:39:00 to 22-MAY-04 22:39:00 (CST)
Location: LENOX
Magnitude: 61 EG
Property damage: 25K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in MADISON, IOWA
From 22-MAY-04 22:45:00 to 22-MAY-04 22:45:00 (CST)
Location: ST CHARLES
Magnitude: 92 MG
Property damage: 40K
Crop damage: 10K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in DALLAS, IOWA
From 22-MAY-04 22:47:00 to 22-MAY-04 22:47:00 (CST)
Location: ADEL
Magnitude: 52 EG
Property damage: 5K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in ADAMS, IOWA
From 22-MAY-04 22:00:00 to 22-MAY-04 22:00:00 (CST)
Location: CORNING
Magnitude: 65 EG
Property damage: 25K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in TAYLOR, IOWA
From 22-MAY-04 22:00:00 to 22-MAY-04 22:00:00 (CST)
Location: SHARPSBURG
Magnitude: 65 EG
Property damage: 50K
Reported by: EMERGENCY MANAGER

Lightning in STORY, IOWA
From 22-MAY-04 20:00:00 to 22-MAY-04 20:00:00 (CST)
Location: NEVADA
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in GUTHRIE, IOWA
From 22-MAY-04 22:20:00 to 22-MAY-04 22:20:00 (CST)
Location: GUTHRIE CENTER
Magnitude: 61 EG
Property damage: 15K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in JASPER, IOWA
From 22-MAY-04 23:20:00 to 22-MAY-04 23:20:00 (CST)
Location: MONROE
Magnitude: 61 EG
Property damage: 25K
Crop damage: 1K
Reported by: FIRE DEPT/RESCUE SQUAD

Hail in STORY, IOWA
From 22-MAY-04 18:20:00 to 22-MAY-04 18:20:00 (CST)
Location: SLATER
Magnitude: 5.50 
Property damage: 100K
Crop damage: 10K
Reported by: FIRE DEPT/RESCUE SQUAD

Hail in CASS, IOWA
From 22-MAY-04 21:57:00 to 22-MAY-04 21:57:00 (CST)
Location: ANITA
Magnitude: 1.00 
Property damage: 2K
Crop damage: 5K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in CASS, IOWA
From 22-MAY-04 22:00:00 to 22-MAY-04 22:00:00 (CST)
Location: CUMBERLAND
Magnitude: 57 EG
Property damage: 10K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CASS, IOWA
From 22-MAY-04 22:01:00 to 22-MAY-04 22:01:00 (CST)
Location: ANITA
Magnitude: 69 EG
Property damage: 50K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in ADAIR, IOWA
From 22-MAY-04 22:05:00 to 22-MAY-04 22:05:00 (CST)
Location: GREENFIELD
Magnitude: 57 EG
Property damage: 10K
Reported by: EMERGENCY MANAGER

Flash Flood in BLACK HAWK, IOWA
From 22-MAY-04 22:05:00 to 23-MAY-04 01:15:00 (CST)
Location: WATERLOO
Property damage: 75K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in ADAIR, IOWA
From 22-MAY-04 22:12:00 to 22-MAY-04 22:12:00 (CST)
Location: GREENFIELD
Magnitude: 52 EG
Property damage: 5K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in ADAMS, IOWA
From 22-MAY-04 22:13:00 to 22-MAY-04 22:13:00 (CST)
Location: PRESCOTT
Magnitude: 61 EG
Property damage: 25K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in ADAIR, IOWA
From 22-MAY-04 22:27:00 to 22-MAY-04 22:27:00 (CST)
Location: GREENFIELD
Magnitude: 53 EG
Property damage: 5K
Reported by: AMATEUR RADIO

Tornado in JASPER, IOWA
From 22-MAY-04 19:23:00 to 22-MAY-04 19:23:00 (CST)
Location: NEWTON
Tornado F-scale: F0
Reported by: LAW ENFORCEMENT

Brief touchdown in open fields.

Tornado in DALLAS, IOWA
From 22-MAY-04 19:27:00 to 22-MAY-04 19:27:00 (CST)
Location: DALLAS CENTER
Tornado F-scale: F0
Reported by: LAW ENFORCEMENT

Brief tornado touchdown in open fileds.

Tornado in JASPER, IOWA
From 22-MAY-04 19:35:00 to 22-MAY-04 19:35:00 (CST)
Location: NEWBURG
Tornado F-scale: F0
Reported by: LAW ENFORCEMENT

Brief tornado touchdown in open fields.

Flash Flood in DALLAS, IOWA
From 22-MAY-04 19:36:00 to 23-MAY-04 02:00:00 (CST)
Location: COUNTYWIDE
Property damage: 250K
Crop damage: 50K
Reported by: LAW ENFORCEMENT

Tornado in JASPER, IOWA
From 22-MAY-04 19:36:00 to 22-MAY-04 19:38:00 (CST)
Location: BAXTER
Tornado F-scale: F0
Property damage: 5K
Crop damage: 2K
Reported by: AMATEUR RADIO

Intermitttent track across open country.

Flash Flood in POLK, IOWA
From 22-MAY-04 19:39:00 to 22-MAY-04 23:15:00 (CST)
Location: NORTH PORTION
Property damage: 100K
Crop damage: 50K
Reported by: EMERGENCY MANAGER

Tornado in MARSHALL, IOWA
From 22-MAY-04 19:40:00 to 22-MAY-04 19:58:00 (CST)
Location: MELBOURNE
Tornado F-scale: F1
Property damage: 10K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Most of track of tornado was in open countryside.  No real significant damage occurred.

Hail in GUTHRIE, IOWA
From 22-MAY-04 19:41:00 to 22-MAY-04 19:41:00 (CST)
Location: YALE
Magnitude: 1.00 
Property damage: 3K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Tornado in POLK, IOWA
From 22-MAY-04 20:06:00 to 22-MAY-04 20:12:00 (CST)
Location: ALLEMAN
Tornado F-scale: F0
Reported by: BROADCAST MEDIA

Intermittent touchdown in fields west of Alleman.

Thunderstorm Wind in ADAMS, IOWA
From 22-MAY-04 22:00:00 to 22-MAY-04 22:00:00 (CST)
Location: CORNING
Magnitude: 69 EG
Property damage: 50K
Reported by: EMERGENCY MANAGER

Hail in BOONE, IOWA
From 22-MAY-04 17:32:00 to 22-MAY-04 17:32:00 (CST)
Location: BOONE
Magnitude: 0.88 
Property damage: 1K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in CARROLL, IOWA
From 22-MAY-04 17:35:00 to 22-MAY-04 17:35:00 (CST)
Location: MANNING
Magnitude: 69 EG
Property damage: 10K
Reported by: TRAINED SPOTTER

Hail in CARROLL, IOWA
From 22-MAY-04 17:42:00 to 22-MAY-04 17:42:00 (CST)
Location: TEMPLETON
Magnitude: 0.88 
Property damage: 1K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CASS, IOWA
From 22-MAY-04 21:08:00 to 22-MAY-04 21:08:00 (CST)
Location: ATLANTIC
Magnitude: 54 EG
Property damage: 5K
Reported by: EMERGENCY MANAGER

Hail in TAMA, IOWA
From 22-MAY-04 21:12:00 to 22-MAY-04 21:12:00 (CST)
Location: TRAER
Magnitude: 1.00 
Property damage: 3K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in POLK, IOWA
From 22-MAY-04 21:15:00 to 22-MAY-04 21:15:00 (CST)
Location: ALLEMAN
Magnitude: 0.88 
Property damage: 2K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CASS, IOWA
From 22-MAY-04 21:30:00 to 22-MAY-04 21:30:00 (CST)
Location: LEWIS
Magnitude: 74 EG
Property damage: 100K
Crop damage: 2K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in CASS, IOWA
From 22-MAY-04 21:30:00 to 22-MAY-04 21:30:00 (CST)
Location: ATLANTIC
Magnitude: 69 EG
Property damage: 15K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CASS, IOWA
From 22-MAY-04 21:39:00 to 22-MAY-04 21:39:00 (CST)
Location: CUMBERLAND
Magnitude: 52 EG
Property damage: 2K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in CASS, IOWA
From 22-MAY-04 21:45:00 to 22-MAY-04 21:45:00 (CST)
Location: LEWIS
Magnitude: 52 EG
Property damage: 1K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in CASS, IOWA
From 22-MAY-04 21:50:00 to 22-MAY-04 21:50:00 (CST)
Location: ATLANTIC
Magnitude: 61 EG
Property damage: 10K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in CASS, IOWA
From 22-MAY-04 22:00:00 to 22-MAY-04 22:00:00 (CST)
Location: ANITA
Magnitude: 69 EG
Property damage: 50K
Reported by: BROADCAST MEDIA

Tornado in JASPER, IOWA
From 22-MAY-04 19:06:00 to 22-MAY-04 19:06:00 (CST)
Location: NEWTON
Tornado F-scale: F0
Reported by: LAW ENFORCEMENT

Bief tornado touchdown in fields northeast of Newton.

Tornado in JASPER, IOWA
From 22-MAY-04 19:20:00 to 22-MAY-04 19:20:00 (CST)
Location: NEWTON
Tornado F-scale: F0
Reported by: TRAINED SPOTTER

Brief touchdown in open fields.

Thunderstorm Wind in DALLAS, IOWA
From 22-MAY-04 19:22:00 to 22-MAY-04 19:22:00 (CST)
Location: REDFIELD
Magnitude: 61 EG
Property damage: 5K
Reported by: LAW ENFORCEMENT

Tornado in ADAIR, IOWA
From 22-MAY-04 18:07:00 to 22-MAY-04 18:24:00 (CST)
Location: GREENFIELD
Tornado F-scale: F1
Property damage: 50K
Crop damage: 10K
Reported by: STORM CHASER

Tornado touched down southwest of the town of Stuart and tracked northeast through mostly open countryside.  The tornado did lift occasionally.

Hail in CARROLL, IOWA
From 22-MAY-04 18:10:00 to 22-MAY-04 18:10:00 (CST)
Location: COON RAPIDS
Magnitude: 1.75 
Property damage: 5K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Tornado in MADISON, IOWA
From 22-MAY-04 18:11:00 to 22-MAY-04 18:11:00 (CST)
Location: EARLHAM
Tornado F-scale: F0
Reported by: LAW ENFORCEMENT

Brief touchdown in open field.

Hail in STORY, IOWA
From 22-MAY-04 18:11:00 to 22-MAY-04 18:11:00 (CST)
Location: AMES
Magnitude: 1.00 
Property damage: 3K
Crop damage: 3K
Reported by: TRAINED SPOTTER

Hail in STORY, IOWA
From 22-MAY-04 18:15:00 to 22-MAY-04 18:15:00 (CST)
Location: AMES
Magnitude: 0.88 
Property damage: 1K
Crop damage: 3K
Reported by: GENERAL PUBLIC

Hail in CARROLL, IOWA
From 22-MAY-04 18:17:00 to 22-MAY-04 18:17:00 (CST)
Location: COON RAPIDS
Magnitude: 1.75 
Property damage: 15K
Crop damage: 5K
Reported by: FIRE DEPT/RESCUE SQUAD

Hail in STORY, IOWA
From 22-MAY-04 18:18:00 to 22-MAY-04 18:18:00 (CST)
Location: SLATER
Magnitude: 2.75 
Property damage: 10K
Crop damage: 5K
Reported by: AMATEUR RADIO

Hail in STORY, IOWA
From 22-MAY-04 18:20:00 to 22-MAY-04 18:20:00 (CST)
Location: AMES
Magnitude: 0.88 
Property damage: 3K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in STORY, IOWA
From 22-MAY-04 18:25:00 to 22-MAY-04 18:25:00 (CST)
Location: AMES
Magnitude: 1.00 
Property damage: 5K
Crop damage: 3K
Reported by: GENERAL PUBLIC

Hail in STORY, IOWA
From 22-MAY-04 18:26:00 to 22-MAY-04 18:26:00 (CST)
Location: AMES
Magnitude: 1.00 
Property damage: 5K
Crop damage: 3K
Reported by: TRAINED SPOTTER

Hail in STORY, IOWA
From 22-MAY-04 18:28:00 to 22-MAY-04 18:28:00 (CST)
Location: AMES
Magnitude: 1.75 
Property damage: 25K
Crop damage: 3K
Reported by: GENERAL PUBLIC

Hail in CARROLL, IOWA
From 22-MAY-04 18:41:00 to 22-MAY-04 18:41:00 (CST)
Location: DEDHAM
Magnitude: 1.75 
Property damage: 5K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Hail in CARROLL, IOWA
From 22-MAY-04 18:41:00 to 22-MAY-04 18:41:00 (CST)
Location: COON RAPIDS
Magnitude: 1.75 
Property damage: 25K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Tornado in STORY, IOWA
From 22-MAY-04 18:45:00 to 22-MAY-04 18:45:00 (CST)
Location: MAXWELL
Tornado F-scale: F0
Property damage: 2K
Crop damage: 2K
Reported by: AMATEUR RADIO

Intermittent tornado track in open fields.

Tornado in DALLAS, IOWA
From 22-MAY-04 18:45:00 to 22-MAY-04 18:45:00 (CST)
Location: DEXTER
Tornado F-scale: F0
Reported by: AMATEUR RADIO

Brief touchdown in open field.

Tornado in TAMA, IOWA
From 22-MAY-04 20:15:00 to 22-MAY-04 20:15:00 (CST)
Location: GARWIN
Tornado F-scale: F0
Crop damage: 1K
Reported by: LAW ENFORCEMENT

Touchdown in open fields south of Garwin.

Flash Flood in MARSHALL, IOWA
From 22-MAY-04 20:30:00 to 22-MAY-04 23:15:00 (CST)
Location: COUNTYWIDE
Property damage: 250K
Crop damage: 50K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in MARSHALL, IOWA
From 22-MAY-04 20:35:00 to 22-MAY-04 20:35:00 (CST)
Location: LE GRAND
Magnitude: 61 EG
Property damage: 10K
Reported by: TRAINED SPOTTER

Flash Flood in BOONE, IOWA
From 22-MAY-04 20:36:00 to 22-MAY-04 23:15:00 (CST)
Location: COUNTYWIDE
Property damage: 200K
Crop damage: 50K
Reported by: LAW ENFORCEMENT

Flash Flood in AUDUBON, IOWA
From 22-MAY-04 20:50:00 to 22-MAY-04 23:15:00 (CST)
Location: COUNTYWIDE
Property damage: 150K
Crop damage: 50K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in CASS, IOWA
From 22-MAY-04 20:56:00 to 22-MAY-04 20:56:00 (CST)
Location: LEWIS
Magnitude: 50 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

Hail in TAMA, IOWA
From 22-MAY-04 21:06:00 to 22-MAY-04 21:06:00 (CST)
Location: TRAER
Magnitude: 1.75 
Property damage: 15K
Crop damage: 5K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in ADAMS, IOWA
From 22-MAY-04 22:00:00 to 23-MAY-04 22:00:00 (CST)
Location: CORNING
Magnitude: 65 EG
Property damage: 50K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in CLARKE, IOWA
From 22-MAY-04 22:30:00 to 22-MAY-04 22:30:00 (CST)
Location: OSCEOLA
Magnitude: 67 MG
Property damage: 10K
Reported by: NEWSPAPER

Thunderstorm Wind in TAMA, IOWA
From 22-MAY-04 20:50:00 to 22-MAY-04 20:50:00 (CST)
Location: GARWIN
Magnitude: 57 EG
Property damage: 10K
Reported by: NEWSPAPER

Hail in GUTHRIE, IOWA
From 22-MAY-04 18:30:00 to 22-MAY-04 18:30:00 (CST)
Location: PANORA
Magnitude: 3.50 
Property damage: 15K
Crop damage: 5K
Reported by: NEWSPAPER

Hail in CARROLL, IOWA
From 22-MAY-04 17:51:00 to 22-MAY-04 17:51:00 (CST)
Location: CARROLL
Magnitude: 1.75 
Property damage: 5K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in BOONE, IOWA
From 22-MAY-04 17:58:00 to 22-MAY-04 17:58:00 (CST)
Location: MADRID
Magnitude: 2.75 
Property damage: 15K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Hail in BOONE, IOWA
From 22-MAY-04 17:59:00 to 22-MAY-04 17:59:00 (CST)
Location: MADRID
Magnitude: 0.88 
Property damage: 1K
Crop damage: 5K
Reported by: NWS EMPLOYEE(OFF DUTY)

Hail in BOONE, IOWA
From 22-MAY-04 17:59:00 to 22-MAY-04 17:59:00 (CST)
Location: MADRID
Magnitude: 1.75 
Property damage: 10K
Crop damage: 3K
Reported by: AMATEUR RADIO

Hail in STORY, IOWA
From 22-MAY-04 18:01:00 to 22-MAY-04 18:01:00 (CST)
Location: AMES
Magnitude: 0.88 
Property damage: 5K
Crop damage: 3K
Reported by: AMATEUR RADIO

Hail in BOONE, IOWA
From 22-MAY-04 18:02:00 to 22-MAY-04 18:02:00 (CST)
Location: MADRID
Magnitude: 2.75 
Property damage: 25K
Crop damage: 3K
Reported by: BROADCAST MEDIA

Hail in STORY, IOWA
From 22-MAY-04 18:03:00 to 22-MAY-04 18:03:00 (CST)
Location: AMES
Magnitude: 1.00 
Property damage: 5K
Crop damage: 3K
Reported by: AMATEUR RADIO

Hail in STORY, IOWA
From 22-MAY-04 18:05:00 to 22-MAY-04 18:05:00 (CST)
Location: KELLEY
Magnitude: 1.75 
Property damage: 5K
Crop damage: 5K
Reported by: EMERGENCY MANAGER

Tornado in DALLAS, IOWA
From 22-MAY-04 19:13:00 to 22-MAY-04 19:13:00 (CST)
Location: WAUKEE
Tornado F-scale: F0
Property damage: 1K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Tornado touched down in fields west of Waukee.

Thunderstorm Wind in MARSHALL, IOWA
From 22-MAY-04 19:15:00 to 22-MAY-04 19:15:00 (CST)
Location: MELBOURNE
Magnitude: 80 EG
Property damage: 25K
Reported by: AMATEUR RADIO

Thunderstorm Wind in MARSHALL, IOWA
From 22-MAY-04 19:19:00 to 22-MAY-04 19:19:00 (CST)
Location: RHODES
Magnitude: 69 EG
Property damage: 10K
Reported by: LAW ENFORCEMENT

Tornado in MARSHALL, IOWA
From 22-MAY-04 19:19:00 to 22-MAY-04 19:20:00 (CST)
Location: FERGUSON
Tornado F-scale: F0
Crop damage: 1K
Reported by: AMATEUR RADIO

Tornado touched down in fields between Ferguson and Collins.

Thunderstorm Wind in MARION, IOWA
From 22-MAY-04 23:50:00 to 22-MAY-04 23:50:00 (CST)
Location: PELLA
Magnitude: 61 EG
Property damage: 25K
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in POLK, IOWA
From 22-MAY-04 22:50:00 to 22-MAY-04 22:50:00 (CST)
Location: CLIVE
Magnitude: 57 EG
Property damage: 5K
Reported by: BROADCAST MEDIA

Thunderstorm Wind in WARREN, IOWA
From 22-MAY-04 23:01:00 to 22-MAY-04 23:01:00 (CST)
Location: SPRING HILL
Magnitude: 61 EG
Property damage: 5K
Reported by: AMATEUR RADIO

Tornado in WARREN, IOWA
From 22-MAY-04 23:02:00 to 22-MAY-04 23:11:00 (CST)
Location: BEVINGTON
Tornado F-scale: F1
Property damage: 100K
Crop damage: 5K
Reported by: FIRE DEPT/RESCUE SQUAD

Tornado spun up in a well organized bow echo and tracked across northern Warren County.

Thunderstorm Wind in CASS, IOWA
From 22-MAY-04 23:15:00 to 22-MAY-04 23:15:00 (CST)
Location: MASSENA
Magnitude: 61 EG
Property damage: 10K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in JASPER, IOWA
From 22-MAY-04 23:25:00 to 22-MAY-04 23:25:00 (CST)
Location: MONROE
Magnitude: 61 EG
Property damage: 10K
Reported by: BROADCAST MEDIA

Flash Flood in WEBSTER, IOWA
From 23-MAY-04 02:00:00 to 23-MAY-04 05:00:00 (CST)
Location: FT DODGE
Magnitude: 50 
Property damage: 5K
Reported by: TRAINED SPOTTER

Hail in GREENE, IOWA
From 22-MAY-04 18:15:00 to 22-MAY-04 18:20:00 (CST)
Location: SCRANTON
Magnitude: 2.00 
Property damage: 10K
Crop damage: 5K
Reported by: GENERAL PUBLIC

Hail in CARROLL, IOWA
From 22-MAY-04 18:17:00 to 22-MAY-04 18:17:00 (CST)
Location: COON RAPIDS
Magnitude: 2.75 
Property damage: 15K
Crop damage: 5K
Reported by: GENERAL PUBLIC

Hail in GREENE, IOWA
From 22-MAY-04 18:20:00 to 22-MAY-04 18:20:00 (CST)
Location: SCRANTON
Magnitude: 2.50 
Property damage: 15K
Crop damage: 5K
Reported by: GENERAL PUBLIC

Hail in AUDUBON, IOWA
From 22-MAY-04 18:30:00 to 22-MAY-04 18:30:00 (CST)
Location: AUDUBON
Magnitude: 1.00 
Property damage: 5K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in GUTHRIE, IOWA
From 22-MAY-04 18:30:00 to 22-MAY-04 18:30:00 (CST)
Location: GUTHRIE CENTER
Magnitude: 0.88 
Property damage: 1K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in AUDUBON, IOWA
From 22-MAY-04 18:35:00 to 22-MAY-04 18:35:00 (CST)
Location: AUDUBON
Magnitude: 1.75 
Property damage: 10K
Crop damage: 25K
Reported by: TRAINED SPOTTER

Hail in GUTHRIE, IOWA
From 22-MAY-04 18:41:00 to 22-MAY-04 18:41:00 (CST)
Location: GUTHRIE CENTER
Magnitude: 3.00 
Property damage: 15K
Crop damage: 10K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in JASPER, IOWA
From 22-MAY-04 23:30:00 to 22-MAY-04 23:30:00 (CST)
Location: REASNOR
Magnitude: 65 EG
Property damage: 10K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in JASPER, IOWA
From 22-MAY-04 23:30:00 to 22-MAY-04 23:30:00 (CST)
Location: REASNOR
Magnitude: 61 EG
Property damage: 5K
Reported by: TRAINED SPOTTER