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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 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 5.00K | 0.00K |
| 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 | Hail | 1.75 in. | 0 | 0 | 10.00K | 10.00K |
| 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 |
| POLK CITY | POLK CO. | IA | 06/18/2009 | 00:53 | CST-6 | Thunderstorm Wind | 50 kts. MG | 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 |
| 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 |
| 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 |
| CAMBRIDGE | 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 |
| HUXLEY | STORY CO. | IA | 06/18/2009 | 01:00 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 10.00K | 0.00K |
| CAMBRIDGE | STORY CO. | IA | 06/18/2009 | 01:00 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 10.00K | 0.00K |
| ANKENY | POLK CO. | IA | 06/18/2009 | 01:00 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 20.00K | 0.00K |
| CLIVE | POLK CO. | IA | 06/18/2009 | 01:02 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 3.00K | 0.00K |
| ANKENY | POLK CO. | IA | 06/18/2009 | 01:02 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 2.00K | 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 |
