A very unstable situation set up during the afternoon and evening of the 20th as a frontal boundary and remnants of the outflow boundary was established across southern Iowa.  Temperatures warmed into the low to mid 90s across southern Iowa along and just south of the boundary.  Dewpoint readings soared into the mid 70s to low 80s by evening.  This resulted in very unstable CAPE values in the 5000 to 5500 J/kg range, and lifted indices of -10 to -13 C. during the evening.  A low level jet of 40 kts set up while the atmosphere showed fairly strong shear, in the 40 to 55 kt range.  There wasn't as much deep moisture as had been present in previous days with 1.3 to 1.6 inches of precipitable water.  The freezing level remained quite high at around 14,600 feet and CAPE in the -10 to -30 C. layer of the atmosphere was only 300 to 500 J/kg.  Downdraft CAPE was considerable however with 1000 to 1500 J/kg available.  The LCL was also higher than it had been the previous day and was between 1500 and 2000 meters.  During the evening, thunderstorms formed rapidly over northern Nebraska and far southern South Dakota to the north of the boundary.  By late evening, additional development took place across Iowa.  For the most part, these storms remained just below severe levels.  One of them produced one and one quarter inch diameter hail over central Iowa however.  The main event was the MCC from Nebraska.  The MCC moved into Iowa after midnight and produced high winds and hail as it moved through.  A portion of the system became a Derecho over west central Iowa and advanced across the state during the early morning hours.  Winds of 60 to 75 MPH were common, with a few gusts estimated as high as 100 MPH in central Iowa.  A radio tower was blown over by the winds in the Dawson area of Dallas County.  Tree damage was very extensive from the winds with local utilities reporting as many as 200,000 homes were without power following the passage of the system.  In Jamaica, in Guthrie County, 50 percent of the trees in town were damaged with 30 trees completely down.  The roof was damaged at the race track there.  The Guthrie County mobile EOC was tossed 150 feet into a field and roads were impassible.  In Polk County, in Ankeny, 20 tO 30 Black Locust trees of 1 to 2 feet in diameter were snapped or uprooted near the intersection of 35th street and Highway 415.  Winds estimated at 100 MPH in Dawson, in Dallas County, caused considerable damage.  Roads were blocked by trees, with heavy equipment required to clear them.  LP tanks were leaking in town as they were thrown about and damaged by trees.  The grain elevator in town was also damaged.  Bulldozers were also required to clear streets of tree damage in Boone County at Madrid.  In Polk County, at Mitchellville, the roof was taken off of a modular building at the Mitchellville Correctional Facility.  Lightning struck a house west of Nevada in Story County, setting it on fire.  A second house was struck by lightning in Poweshiek County in Montezuma.  Minor damage was reported to the building.

Thunderstorm Wind in BOONE, IOWA
From 21-JUL-08 02:20:00 to 21-JUL-08 02:20:00 (CST-6)
Location: MADRID
Magnitude: 75.00 EG
Property damage: 25.00K
Crop damage: 50.00K
Reported by: Law Enforcement

Extensive large tree limbs blown off trees.  Bulldozer will be needed to clear streets.

Thunderstorm Wind in CARROLL, IOWA
From 21-JUL-08 01:20:00 to 21-JUL-08 01:20:00 (CST-6)
Location: DEDHAM
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Thunderstorm Wind in JASPER, IOWA
From 21-JUL-08 02:48:00 to 21-JUL-08 02:48:00 (CST-6)
Location: PRAIRIE CITY
Magnitude: 56.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in JASPER, IOWA
From 21-JUL-08 02:51:00 to 21-JUL-08 02:51:00 (CST-6)
Location: BAXTER
Magnitude: 51.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Report from a KCCI schoolnet site.

Thunderstorm Wind in JASPER, IOWA
From 21-JUL-08 02:58:00 to 21-JUL-08 02:58:00 (CST-6)
Location: NEWTON
Magnitude: 50.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Report received from a KCCI schoolnet site.

Thunderstorm Wind in JASPER, IOWA
From 21-JUL-08 02:45:00 to 21-JUL-08 02:45:00 (CST-6)
Location: PRAIRIE CITY
Magnitude: 56.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees and tree limbs down with power out.

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:25:00 to 21-JUL-08 02:25:00 (CST-6)
Location: DES MOINES
Magnitude: 55.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Mesonet

Report received from KCCI schoolnet site.

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:35:00 to 21-JUL-08 02:35:00 (CST-6)
Location: ANKENY
Magnitude: 53.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:28:00 to 21-JUL-08 02:28:00 (CST-6)
Location: DALLAS CENTER
Magnitude: 65.00 EG
Property damage: 15.00K
Crop damage: 25.00K
Reported by: Amateur Radio

Large trees down at Highway 44 and 15th Street.  Other tree damage throughout town.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:09:00 to 21-JUL-08 02:09:00 (CST-6)
Location: PERRY
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

One foot diameter tree down with other widespread tree damage.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:10:00 to 21-JUL-08 02:10:00 (CST-6)
Location: DALLAS CENTER
Magnitude: 70.00 EG
Property damage: 100.00K
Crop damage: 50.00K
Reported by: Law Enforcement

Highway 44 in Dallas Center was blocked due to tree limbs down across the road.  Several homes were damaged by falling limbs.

Thunderstorm Wind in GREENE, IOWA
From 21-JUL-08 02:00:00 to 21-JUL-08 02:00:00 (CST-6)
Location: GRAND JCT
Magnitude: 75.00 EG
Property damage: 50.00K
Crop damage: 50.00K
Reported by: Amateur Radio

Numerous trees were down, some up to 2 feet in diameter.  Power was out, especially widespread in rural areas.

Lightning in STORY, IOWA
From 21-JUL-08 02:49:00 to 21-JUL-08 02:49:00 (CST-6)
Location: NEVADA
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

House was set on fire due to lightning strike.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:11:00 to 21-JUL-08 02:11:00 (CST-6)
Location: DALLAS CENTER
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:12:00 to 21-JUL-08 02:12:00 (CST-6)
Location: DAWSON
Magnitude: 87.00 EG
Property damage: 50.00K
Crop damage: 50.00K
Reported by: Law Enforcement

Numerous trees uprooted.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:15:00 to 21-JUL-08 02:15:00 (CST-6)
Location: DALLAS CENTER
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Dallas County Law Enforcement reported winds of 70 MPH in Dallas Center.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:27:00 to 21-JUL-08 02:27:00 (CST-6)
Location: HADDEN HILL
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GUTHRIE, IOWA
From 21-JUL-08 01:52:00 to 21-JUL-08 01:52:00 (CST-6)
Location: MONTEITH
Magnitude: 52.00 MG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured gust from KCCI schoolnet site.

Thunderstorm Wind in JASPER, IOWA
From 21-JUL-08 02:45:00 to 21-JUL-08 02:45:00 (CST-6)
Location: PRAIRIE CITY
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in POWESHIEK, IOWA
From 21-JUL-08 03:19:00 to 21-JUL-08 03:19:00 (CST-6)
Location: MONTEZUMA
Magnitude: 57.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured gust by KCCI schoolnet site.

Thunderstorm Wind in JASPER, IOWA
From 21-JUL-08 02:48:00 to 21-JUL-08 02:48:00 (CST-6)
Location: COLFAX
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:26:00 to 21-JUL-08 02:26:00 (CST-6)
Location: WINDSOR HGTS
Magnitude: 63.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in CARROLL, IOWA
From 21-JUL-08 01:26:00 to 21-JUL-08 01:26:00 (CST-6)
Location: BREDA
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CARROLL, IOWA
From 21-JUL-08 01:28:00 to 21-JUL-08 01:28:00 (CST-6)
Location: ARCADIA
Magnitude: 56.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CARROLL, IOWA
From 21-JUL-08 01:05:00 to 21-JUL-08 01:05:00 (CST-6)
Location: ARCADIA
Magnitude: 56.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CARROLL, IOWA
From 21-JUL-08 01:05:00 to 21-JUL-08 01:05:00 (CST-6)
Location: BREDA
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 01:59:00 to 21-JUL-08 02:09:00 (CST-6)
Location: PERRY
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Damaging wind lasted 10 minutes and was still in progress.

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:16:00 to 21-JUL-08 02:21:00 (CST-6)
Location: POLK CITY
Magnitude: 61.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Employee

Winds at the NWS office were measured at 70 MPH with small hail.  Winds lasted 5 minutes and were still going on.

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:28:00 to 21-JUL-08 02:28:00 (CST-6)
Location: ANKENY
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in POWESHIEK, IOWA
From 21-JUL-08 03:19:00 to 21-JUL-08 03:19:00 (CST-6)
Location: MONTEZUMA
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WARREN, IOWA
From 21-JUL-08 02:29:00 to 21-JUL-08 02:29:00 (CST-6)
Location: NORWALK
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Lawn furniture was blown away.

Thunderstorm Wind in CARROLL, IOWA
From 21-JUL-08 01:23:00 to 21-JUL-08 01:23:00 (CST-6)
Location: GLIDDEN
Magnitude: 66.00 MG
Property damage: 25.00K
Crop damage: 50.00K
Reported by: Mesonet

From a KCCI schoolnet site.

Thunderstorm Wind in CARROLL, IOWA
From 21-JUL-08 01:28:00 to 21-JUL-08 01:28:00 (CST-6)
Location: GLIDDEN
Magnitude: 68.00 MG
Property damage: 25.00K
Crop damage: 50.00K
Reported by: Mesonet

Measured wind by KCCI schoolnet site.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 01:49:00 to 21-JUL-08 01:49:00 (CST-6)
Location: DAWSON
Magnitude: 58.00 MG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

From a KCCI television viewer.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:14:00 to 21-JUL-08 02:14:00 (CST-6)
Location: WOODWARD
Magnitude: 52.00 MG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured wind from a KCCI schoolnet site.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:13:00 to 21-JUL-08 02:13:00 (CST-6)
Location: DAWSON
Magnitude: 87.00 EG
Property damage: 75.00K
Crop damage: 50.00K
Reported by: Law Enforcement

Trained spotters reported winds estimated at 100 MPH with numerous trees uprooted in Dawson.

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:28:00 to 21-JUL-08 02:28:00 (CST-6)
Location: FT DES MOINES
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds from 60 to 70 MPH near the intersection of 18th and McKinley Ave.

Thunderstorm Wind in GUTHRIE, IOWA
From 21-JUL-08 01:50:00 to 21-JUL-08 01:50:00 (CST-6)
Location: PANORA
Magnitude: 55.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree damage also reported.

Thunderstorm Wind in GUTHRIE, IOWA
From 21-JUL-08 01:40:00 to 21-JUL-08 01:40:00 (CST-6)
Location: PANORA
Magnitude: 55.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree damage also reported.

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:28:00 to 21-JUL-08 02:28:00 (CST-6)
Location: URBANDALE
Magnitude: 64.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree damage reported as well.

Thunderstorm Wind in CARROLL, IOWA
From 21-JUL-08 01:25:00 to 21-JUL-08 01:25:00 (CST-6)
Location: DEDHAM
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Trained spotter reported widespread power line damage in the Carroll area.

Thunderstorm Wind in GREENE, IOWA
From 21-JUL-08 01:44:00 to 21-JUL-08 01:44:00 (CST-6)
Location: SCRANTON
Magnitude: 65.00 EG
Property damage: 20.00K
Crop damage: 5.00K
Reported by: Newspaper

Thunderstorm Wind in BOONE, IOWA
From 21-JUL-08 02:08:00 to 21-JUL-08 02:08:00 (CST-6)
Location: OGDEN
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 5.00K
Reported by: Newspaper

Hail in STORY, IOWA
From 21-JUL-08 01:57:00 to 21-JUL-08 01:57:00 (CST-6)
Location: AMES
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 5.00K
Reported by: Trained Spotter

An ISU Meteorology professor reported mainly one half inch to nickel size hail with a few up to golf ball size.

Thunderstorm Wind in GUTHRIE, IOWA
From 21-JUL-08 01:30:00 to 21-JUL-08 01:30:00 (CST-6)
Location: BAYARD
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 10.00K
Reported by: Emergency Manager

Power was out in town with fires caused by limbs on power lines.

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:18:00 to 21-JUL-08 02:18:00 (CST-6)
Location: POLK CITY
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:22:00 to 21-JUL-08 02:22:00 (CST-6)
Location: ANKENY
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 25.00K
Reported by: Amateur Radio

Numerous 4 to 6 inch branches down.  One 14 inch branch down. Fifty percent of the town without power.

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:26:00 to 21-JUL-08 02:26:00 (CST-6)
Location: POLK CITY
Magnitude: 62.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Employee

Lightning in POWESHIEK, IOWA
From 21-JUL-08 03:19:00 to 21-JUL-08 03:19:00 (CST-6)
Location: MONTEZUMA
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in POWESHIEK, IOWA
From 21-JUL-08 03:29:00 to 21-JUL-08 03:29:00 (CST-6)
Location: DEEP RIVER
Magnitude: 57.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power lines down.

Thunderstorm Wind in GREENE, IOWA
From 21-JUL-08 01:43:00 to 21-JUL-08 01:43:00 (CST-6)
Location: SCRANTON
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Hail in DALLAS, IOWA
From 21-JUL-08 00:14:00 to 21-JUL-08 00:14:00 (CST-6)
Location: MINBURN
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Hail in JASPER, IOWA
From 21-JUL-08 02:48:00 to 21-JUL-08 02:48:00 (CST-6)
Location: COLFAX
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Amateur Radio

Winds of 60 MPH as well.

Thunderstorm Wind in GUTHRIE, IOWA
From 21-JUL-08 01:50:00 to 21-JUL-08 01:50:00 (CST-6)
Location: JAMAICA
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A 4 inch flag pole was bent by the wind. Power was reported out as well.

Thunderstorm Wind in GUTHRIE, IOWA
From 21-JUL-08 01:45:00 to 21-JUL-08 01:45:00 (CST-6)
Location: JAMAICA
Magnitude: 80.00 EG
Property damage: 75.00K
Crop damage: 50.00K
Reported by: Emergency Manager

Three to four foot diameter trees were down with roads impassable.  A travel trailer was blown approximately 150 feet.

Thunderstorm Wind in GUTHRIE, IOWA
From 21-JUL-08 01:45:00 to 21-JUL-08 01:45:00 (CST-6)
Location: GUTHRIE CENTER
Magnitude: 70.00 EG
Property damage: 25.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Power was out with numerous tree limbs down, one was 18 inches in diameter.  A swing set was picked up and rolled across the yard.

Thunderstorm Wind in GUTHRIE, IOWA
From 21-JUL-08 01:35:00 to 21-JUL-08 01:35:00 (CST-6)
Location: BAGLEY
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees down and power was out in town.

Thunderstorm Wind in STORY, IOWA
From 21-JUL-08 02:23:00 to 21-JUL-08 02:23:00 (CST-6)
Location: SLATER
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree uprooted and fell on an LP tank at a farmstead between Slater and Alleman.

Thunderstorm Wind in GUTHRIE, IOWA
From 21-JUL-08 01:50:00 to 21-JUL-08 01:50:00 (CST-6)
Location: JAMAICA
Magnitude: 75.00 EG
Property damage: 150.00K
Crop damage: 75.00K
Reported by: Emergency Manager

Significant tree damage in town with 50 percent of the trees damaged.   Thirty trees were down, two sheds had roof damage and the county mobile EOC was tossed 150 feet into the field.

Thunderstorm Wind in JASPER, IOWA
From 21-JUL-08 02:44:00 to 21-JUL-08 02:44:00 (CST-6)
Location: COLFAX
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 25.00K
Reported by: Amateur Radio

Numerous trees and limbs down. Power was out all the way north to Interstate 80.

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:45:00 to 21-JUL-08 02:45:00 (CST-6)
Location: SANTIAGO
Magnitude: 70.00 EG
Property damage: 25.00K
Crop damage: 10.00K
Reported by: Law Enforcement

Roof blown off of a modular building at the Mitchellville Correctional Facility.

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:21:00 to 21-JUL-08 02:21:00 (CST-6)
Location: JOHNSTON
Magnitude: 57.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Storm Chaser

One foot diameter tree branch was blocking the road.

Hail in POLK, IOWA
From 21-JUL-08 00:39:00 to 21-JUL-08 00:39:00 (CST-6)
Location: RIDER
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 10.00K
Reported by: Law Enforcement

Hail in POLK, IOWA
From 21-JUL-08 02:18:00 to 21-JUL-08 02:18:00 (CST-6)
Location: POLK CITY
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 5.00K
Reported by: Amateur Radio

Hail in POLK, IOWA
From 21-JUL-08 02:25:00 to 21-JUL-08 02:25:00 (CST-6)
Location: ANKENY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Hail in STORY, IOWA
From 21-JUL-08 02:04:00 to 21-JUL-08 02:04:00 (CST-6)
Location: AMES
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Hail in STORY, IOWA
From 21-JUL-08 02:07:00 to 21-JUL-08 02:07:00 (CST-6)
Location: AMES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Hail in STORY, IOWA
From 21-JUL-08 02:06:00 to 21-JUL-08 02:06:00 (CST-6)
Location: AMES
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Law Enforcement

Hail in STORY, IOWA
From 21-JUL-08 02:10:00 to 21-JUL-08 02:10:00 (CST-6)
Location: AMES
Magnitude: 0.88 
Property damage: 2.00K
Crop damage: 5.00K
Reported by: Amateur Radio

Thunderstorm Wind in POLK, IOWA
From 21-JUL-08 02:25:00 to 21-JUL-08 02:25:00 (CST-6)
Location: ORALABOR
Magnitude: 70.00 EG
Property damage: 100.00K
Crop damage: 50.00K
Reported by: Public

Twenty to 30 Black Locust trees 1 to 2 feet in diameter and 50 to 60 feet tall were downed or snapped off.  A few were uprooted at the intersection of 35th St. and Highway 415.  Trees were on top of a house as well.

Thunderstorm Wind in POWESHIEK, IOWA
From 21-JUL-08 03:24:00 to 21-JUL-08 03:24:00 (CST-6)
Location: GRINNELL
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tree damage on the Grinnell College campus.

Thunderstorm Wind in POWESHIEK, IOWA
From 21-JUL-08 03:10:00 to 21-JUL-08 03:10:00 (CST-6)
Location: GRINNELL
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous tree limbs down across town and the power was out.

Hail in DALLAS, IOWA
From 21-JUL-08 02:00:00 to 21-JUL-08 02:00:00 (CST-6)
Location: WOODWARD
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:14:00 to 21-JUL-08 02:14:00 (CST-6)
Location: PERRY
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees down in town.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:27:00 to 21-JUL-08 02:27:00 (CST-6)
Location: WOODWARD
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 30.00K
Reported by: Trained Spotter

A trained spotter reported whole trees down in Woodward with wind gusts to around 75 MPH.  Also, dime to nickel size hail fell at approximately 0200 CDT.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 01:52:00 to 21-JUL-08 01:52:00 (CST-6)
Location: DAWSON
Magnitude: 87.00 EG
Property damage: 100.00K
Crop damage: 75.00K
Reported by: Trained Spotter

Numerous trees were uprooted with only one road remaining open in town.  Three homes had trees down on them.  A few LP tanks were leaking due to tree damage and a grain elevator sustained damage in town.

Thunderstorm Wind in GREENE, IOWA
From 21-JUL-08 01:44:00 to 21-JUL-08 01:44:00 (CST-6)
Location: SCRANTON
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 10.00K
Reported by: Law Enforcement

Numerous trees down due to very high winds.

Thunderstorm Wind in CRAWFORD, IOWA
From 21-JUL-08 00:50:00 to 21-JUL-08 00:50:00 (CST-6)
Location: DENISON
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 10.00K
Reported by: Law Enforcement

Numerous trees down across Denison and across Crawford County.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:02:00 to 21-JUL-08 02:02:00 (CST-6)
Location: PERRY
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Numerous large trees down.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:05:00 to 21-JUL-08 02:05:00 (CST-6)
Location: DAWSON
Magnitude: 70.00 EG
Property damage: 25.00K
Crop damage: 75.00K
Reported by: Trained Spotter

Numerous trees were downed and power lines along Highway 141 from Jamaica to Perry.  Tree damage also in Dawson.

Thunderstorm Wind in DALLAS, IOWA
From 21-JUL-08 02:28:00 to 21-JUL-08 02:28:00 (CST-6)
Location: MINBURN
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Significant tree and power pole damage. Several trees blocked.