Following the morning convection, there was little break before the cold front mentioned in the previous narrative moved into the state.  The cold front advanced across the state accompanied by a strong upper level short wave.  Severe parameters were not all that impressive, however it was a case of low top convection close to the upper low.  The zero to 1 km helicity was quite high, in the 350 to 400 J/kg range and there was significant shear with effective shear in the 50 to 60 kt range.  Other parameters were not all that impressive with most unstable CAPE in the 500 to 1000 J/kg range and lifted indices between zero and -3 C.  The downdraft CAPE was around 500 J/kg with only about 100 J/kg of CAPE available in the -10 to -30 C. layer of the atmosphere.  The LCL was quite low given the saturation caused from the previous convection.  It was between 750 and 1000 meters.  As the line of convection from the morning shifted to the east, a narrow line of strong thunderstorms developed along the cold front and the approach of the upper low.  Initially, downburst winds occurred with the line with winds estimated around 65 MPH south of New Market in Taylor County.  A short distance to the west of the CWA, a 75 MPH wind gust occurred at an RWIS site.  As the storms raced east they produced gusty winds and very heavy rainfall.  The storms produced a small, but intense, tornado in downtown Des Moines.  Two power poles snapped and power lines down at 13th and Mulberry. At 6th and Mulberry, two vehicles were flipped including one SUV that was likely flipped nose down due to engine weight. The SUV slid about 30 feet.  Eyewitness saw a small 10 foot tree lifted into the circulation and rotating around briefly.  Media reported some roof debris on the SW 9th overpass at Martin Luther King Parkway, but no building damage is evident at this time.  Some buildings were damaged in the area.  Multi story and roof damage would be difficult To see from the street.  The tornado was rated an EF1 with 110 MPH winds.  This was the first tornado to touchdown in the Des Moines city limits since 30 May, 2000.  High winds hit just east of the Des Moines Airport, blowing out the windows of 6 cars in a parking lot.  As the storms moved east, another tornado touched down near the town of Seymour, in Wayne County.  A farmer reported seeing a tornado touch down just southwest of Seymour. The tornado tore metal roofing off his shed. The tornado curved through town, blowing open doors at a school but causing little damage to the school. Windows were blown out of a church and a large tree feel to the west, knocking out power. A fabric roof was partially torn off a hoop storage shed at the elevator in town. A few trees were also topped. Path was very narrow and intermittent No other damage in the county.  The tornado was rated an EF1 with 95 MPH winds.  Two other small tornadoes touched down in Mahaska County.  One was east-northeast of Bussy and was on the ground for about 4 minutes.  The tornado tracked through open fields and only did agricultural damage.  The second was an anti-cyclonic tornado that touched down briefly in an open field southeast of Bussy.

Tornado in POLK, IOWA
From 02-OCT-07 15:40:00 to 02-OCT-07 15:41:00 (CST-6)
Location: DES MOINES
Tornado F-scale: EF1
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Utility Company

A tornado took down power lines and power poles were snapped at 13th Street and Mulberry.  The public reported a flipped car at SW 6th Street and Mulberry.

Tornado in WAYNE, IOWA
From 02-OCT-07 16:35:00 to 02-OCT-07 16:37:00 (CST-6)
Location: SEYMOUR
Tornado F-scale: EF1
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Wayne County EM reported a roof blown off of a building, windows blown out of homes, and power lines down in the town of Seymour.

Thunderstorm Wind in POLK, IOWA
From 02-OCT-07 15:47:00 to 02-OCT-07 15:47:00 (CST-6)
Location: (DSM)DES MOINES INTL
Magnitude: 70.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High winds at the Des Moines Airport damaged a parking area.  A toll  booth was damaged and 6 different cars with windows blown out.

Tornado in MAHASKA, IOWA
From 02-OCT-07 16:53:00 to 02-OCT-07 16:57:00 (CST-6)
Location: LAKONTA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Public

The public reported a tornado touchdown in open fields and pastures. It was on the ground for 4 minutes. The KCCI TV Twin Cedars web cam verifies the tornado.

Tornado in MAHASKA, IOWA
From 02-OCT-07 16:55:00 to 02-OCT-07 16:56:00 (CST-6)
Location: LAKONTA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Trained Spotter

A brief tornado touchdown occurred in an open field. The rotation of this tornado was anti-cyclonic.

Thunderstorm Wind in TAYLOR, IOWA
From 02-OCT-07 14:15:00 to 02-OCT-07 14:15:00 (CST-6)
Location: NEW MARKET
Magnitude: 57.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement