Storm Events Database

Event Details

Event Thunderstorm Wind
Magnitude 52 kts.
State IOWA
County/Area SAC
WFO DMX
Begin Date 06/17/2009 23:15:00 CST-6
Begin Range 1
Begin Azimuth S
Begin Location LAKE VIEW
Begin Lat/Lon 42.31/-95.05
End Date 06/17/2009 23:15:00 CST-6
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 2.00K
Crop Damage 0.00K
Episode Narrative A semi-stationary frontal boundary remained in place across southern Iowa while a secondary boundary was stretched from eastern South Dakota into northeast Iowa. The airmass became very unstable with lifted indices falling to -10 to -15 C and most unstable CAPE rising to 5000 to 6000 J/kg. Zero to 3 km CAPE rose to over 200 J/kg in northern Iowa by the late afternoon. Surface temperatures rose to the 80s to low 90s, as dew point values reached the upper 60s to mid 70s. Wind fields were somewhat weak, however effective shear was in the 35 to 50 kt range by late afternoon. The amount of CAPE in the -10 to -30 layer of the atmosphere rose to over 400 J/kg by late afternoon. Thunderstorms erupted in two places initially. The first was along the northern boundary. However the severe storms with this round remained to the north of Iowa. A second round formed north of the southern boundary along the edge of the mid level cap. The storms became severe and produced high winds and hail. Thunderstorms from farther west moved into Iowa later in the evening and became severe. The storms produced a weak Derecho. Widespread winds of 60 to 70 MPH occurred with these storms, along with numerous reports of hail of 1 to 2 inches in diameter. The initial round of storms produced large hail and gusty winds from southwest into central Iowa. The second round resulted in winds of 60 to 70 MPH and large hail from central into southeast Iowa. The highest wind gust was 74 MPH, measured at an RWIS site near Ankeny in Polk County. The wind damage was largely to trees and power lines, with spotty reports of small shed and minor building damage. A semi-tractor trailer was blown off of Interstate 35 near Highway 210 in Story County. The high winds ripped siding off of a house in Ankeny in Polk county, and windows were blown out of a house in Colfax in Jasper County. Thunderstorms rekindled on the back side of the main thunderstorm area after sunrise. A few storms became severe and produced 60 MPH winds and golf ball size hail as they moved from The Fort Dodge area into Story County.
Event Narrative A medium sized tree was down.


All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 3 372.00K 157.00K
ANITA MUNI ARPT CASS CO. IA 06/17/2009 20:33 CST-6 Hail 0.88 in. 0 0 0.00K 5.00K
GRAY AUDUBON CO. IA 06/17/2009 21:00 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
KENFIELD AUDUBON CO. IA 06/17/2009 21:06 CST-6 Hail 1.75 in. 0 0 5.00K 10.00K
ARBOR HILL ADAIR CO. IA 06/17/2009 21:10 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
ADAIR ADAIR CO. IA 06/17/2009 21:28 CST-6 Hail 1.25 in. 0 0 10.00K 25.00K
ADAIR ADAIR CO. IA 06/17/2009 21:30 CST-6 Hail 1.75 in. 0 0 10.00K 10.00K
ADAIR ADAIR CO. IA 06/17/2009 21:31 CST-6 Hail 1.75 in. 0 0 10.00K 10.00K
ADAIR ADAIR CO. IA 06/17/2009 21:37 CST-6 Hail 1.00 in. 0 0 2.00K 5.00K
LOVINGTON POLK CO. IA 06/17/2009 21:43 CST-6 Hail 1.00 in. 0 0 0.00K 3.00K
LOVINGTON POLK CO. IA 06/17/2009 21:45 CST-6 Hail 1.75 in. 0 0 10.00K 3.00K
LOVINGTON POLK CO. IA 06/17/2009 21:45 CST-6 Hail 1.00 in. 0 0 3.00K 5.00K
CARNEY POLK CO. IA 06/17/2009 21:50 CST-6 Hail 0.75 in. 0 0 0.00K 5.00K
CASEY GUTHRIE CO. IA 06/17/2009 21:53 CST-6 Hail 2.00 in. 0 0 10.00K 10.00K
WINTERSET ARPT MADISON CO. IA 06/17/2009 22:00 CST-6 Hail 1.00 in. 0 0 3.00K 10.00K
BONDURANT POLK CO. IA 06/17/2009 22:05 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
HOWE ADAIR CO. IA 06/17/2009 22:12 CST-6 Hail 1.00 in. 0 0 1.00K 5.00K
PERU MADISON CO. IA 06/17/2009 23:05 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
EAST PERU MADISON CO. IA 06/17/2009 23:10 CST-6 Hail 1.75 in. 0 0 10.00K 10.00K
PERU MADISON CO. IA 06/17/2009 23:10 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
EAST PERU MADISON CO. IA 06/17/2009 23:10 CST-6 Thunderstorm Wind 56 kts. EG 0 0 5.00K 0.00K
LAKE VIEW SAC CO. IA 06/17/2009 23:15 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
BARNEY MADISON CO. IA 06/17/2009 23:16 CST-6 Funnel Cloud 0 0 0.00K 0.00K
TRURO MADISON CO. IA 06/17/2009 23:25 CST-6 Hail 1.75 in. 0 0 10.00K 5.00K
JAMISON CLARKE CO. IA 06/17/2009 23:45 CST-6 Hail 1.00 in. 0 0 5.00K 5.00K
LISCOMB MARSHALL CO. IA 06/17/2009 23:45 CST-6 Thunderstorm Wind 57 kts. EG 0 0 15.00K 0.00K
LIDDERDALE CARROLL CO. IA 06/17/2009 23:58 CST-6 Hail 1.00 in. 0 0 2.00K 5.00K
CHARITON LUCAS CO. IA 06/18/2009 00:01 CST-6 Hail 1.00 in. 0 0 2.00K 5.00K
OSKALOOSA MAHASKA CO. IA 06/18/2009 00:38 CST-6 Thunderstorm Wind 61 kts. EG 0 0 10.00K 0.00K
BOONE MUNI ARPT BOONE CO. IA 06/18/2009 00:42 CST-6 Thunderstorm Wind 52 kts. EG 0 0 3.00K 0.00K
MADRID BOONE CO. IA 06/18/2009 00:53 CST-6 Thunderstorm Wind 61 kts. EG 0 0 5.00K 0.00K
POLK CITY POLK CO. IA 06/18/2009 00:53 CST-6 Thunderstorm Wind 50 kts. MG 0 0 3.00K 0.00K
HUXLEY STORY CO. IA 06/18/2009 00:55 CST-6 Thunderstorm Wind 57 kts. EG 0 0 25.00K 0.00K
MADRID BOONE CO. IA 06/18/2009 00:55 CST-6 Thunderstorm Wind 51 kts. EG 0 0 3.00K 0.00K
MADRID BOONE CO. IA 06/18/2009 00:58 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
ANKENY POLK CO. IA 06/18/2009 01:00 CST-6 Thunderstorm Wind 61 kts. EG 0 0 20.00K 0.00K
CAMBRIDGE STORY CO. IA 06/18/2009 01:00 CST-6 Thunderstorm Wind 57 kts. EG 0 0 10.00K 0.00K
HUXLEY STORY CO. IA 06/18/2009 01:00 CST-6 Thunderstorm Wind 57 kts. EG 0 0 10.00K 0.00K
CARNEY POLK CO. IA 06/18/2009 01:00 CST-6 Thunderstorm Wind 52 kts. MG 0 0 3.00K 0.00K
RED ROCK MARION CO. IA 06/18/2009 01:00 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
CAMBRIDGE STORY CO. IA 06/18/2009 01:00 CST-6 Thunderstorm Wind 57 kts. EG 0 0 10.00K 0.00K
POLK CITY POLK CO. IA 06/18/2009 01:00 CST-6 Thunderstorm Wind 52 kts. MG 0 0 1.00K 0.00K
ALLEMAN POLK CO. IA 06/18/2009 01:00 CST-6 Thunderstorm Wind 57 kts. EG 0 0 10.00K 0.00K
ANKENY POLK CO. IA 06/18/2009 01:02 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
CLIVE POLK CO. IA 06/18/2009 01:02 CST-6 Thunderstorm Wind 52 kts. EG 0 0 3.00K 0.00K
HUXLEY STORY CO. IA 06/18/2009 01:05 CST-6 Thunderstorm Wind 56 kts. EG 0 0 3.00K 0.00K
ANKENY POLK CO. IA 06/18/2009 01:06 CST-6 Thunderstorm Wind 52 kts. EG 0 3 0.00K 0.00K
ANKENY POLK CO. IA 06/18/2009 01:08 CST-6 Thunderstorm Wind 52 kts. EG 0 0 10.00K 0.00K
ANKENY POLK CO. IA 06/18/2009 01:08 CST-6 Thunderstorm Wind 52 kts. EG 0 0 3.00K 0.00K
BONDURANT POLK CO. IA 06/18/2009 01:10 CST-6 Thunderstorm Wind 61 kts. EG 0 0 25.00K 0.00K
URBANDALE POLK CO. IA 06/18/2009 01:10 CST-6 Hail 0.88 in. 0 0 0.00K 1.00K
DES MOINES POLK CO. IA 06/18/2009 01:13 CST-6 Thunderstorm Wind 51 kts. EG 0 0 3.00K 0.00K
ANKENY POLK CO. IA 06/18/2009 01:14 CST-6 Thunderstorm Wind 64 kts. MG 0 0 10.00K 0.00K
(DSM)DES MOINES INTL POLK CO. IA 06/18/2009 01:14 CST-6 Thunderstorm Wind 50 kts. MG 0 0 1.00K 0.00K
VALERIA JASPER CO. IA 06/18/2009 01:17 CST-6 Thunderstorm Wind 61 kts. EG 0 0 15.00K 0.00K
OTTUMWA WAPELLO CO. IA 06/18/2009 01:22 CST-6 Thunderstorm Wind 57 kts. EG 0 0 3.00K 0.00K
COLFAX JASPER CO. IA 06/18/2009 01:23 CST-6 Thunderstorm Wind 51 kts. MG 0 0 3.00K 0.00K
PRAIRIE CITY JASPER CO. IA 06/18/2009 01:25 CST-6 Thunderstorm Wind 61 kts. EG 0 0 10.00K 0.00K
GODDARD JASPER CO. IA 06/18/2009 01:25 CST-6 Thunderstorm Wind 52 kts. EG 0 0 3.00K 0.00K
RED ROCK MARION CO. IA 06/18/2009 01:30 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
ELDON WAPELLO CO. IA 06/18/2009 01:35 CST-6 Thunderstorm Wind 61 kts. EG 0 0 10.00K 0.00K
KNOXVILLE ARPT MARION CO. IA 06/18/2009 01:48 CST-6 Hail 1.00 in. 0 0 2.00K 5.00K
FT DODGE WEBSTER CO. IA 06/18/2009 07:05 CST-6 Thunderstorm Wind 52 kts. EG 0 0 3.00K 0.00K
MC CALLSBURG STORY CO. IA 06/18/2009 08:05 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
MC CALLSBURG STORY CO. IA 06/18/2009 08:11 CST-6 Hail 1.75 in. 0 0 5.00K 10.00K
Totals: 0 3 372.00K 157.00K