Storm Events Database

Event Details

Event Thunderstorm Wind
Magnitude 56 kts.
State IOWA
County/Area SAC
WFO DMX
Begin Date 08/08/2010 19:05:00 CST-6
Begin Range 0
Begin Azimuth N
Begin Location SCHALLER
Begin Lat/Lon 42.5/-95.3
End Date 08/08/2010 19:05:00 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 very unstable airmass was in place over Iowa. Afternoon temperatures warmed into the upper 80s to mid 90s, with dewpoint readings in the upper 70s to low 80s. A weak boundary extended out of eastern Nebraska across northern Iowa. This boundary helped to focus moisture. At the same time, a negatively tilted shortwave lifted northeast out of the Rockies into Nebraska during the afternoon and early evening. The lifted index fell to -10 to -14 C by evening with CAPE rising to 5000-7000 J/kg in the very moist airmass. The freezing level was very high, between 16,000 and 17,000 feet. As a result, there was little in the way of hail. The downdraft CAPE was quite high, 800 to 1400 J/kg. Thunderstorms formed in northeast Nebraska. They rapidly formed into an upscale MCS, and eventually a full-fledged MCC. Precipitable water values were extremely high, in the 2.5 to 2.75 inch range. The primary mode of severe weather with the system was in the form of high wind. Wind gusts of 60 to 70 MPH caused sporadic damage across western into central Iowa with tree damage, as well as damage to outbuildings. The storms produced one funnel cloud in Carroll County. The high precipitable water values led to very heavy rainfall with widespread flash flooding. A swath of 2 to 5 inch rainfall extended from west central, through central, into parts of southeast Iowa. There were numerous reports of a foot or more of flowing water over streets. Following the flash flooding, water remained standing on many roads due to the soils across the state being nearly saturated. This resulted in some road closures. The Des Moines metropolitan area was hard hit as 3 to 5 inches of rain fell in 4 hours or less. This caused extensive flooding in the city. Some evacuations took place. One was at a trailer court along Four Mile Creek on the east side of Des Moines. Numerous roads were closed on the west side as well as Walnut Creek jumped its banks. In fact, the creek set an all-time record high stage. Fast rising waters of North Walnut Creek flooded four basement apartment units in Clive with water rescues taking place. Lightning struck a house in Adel, setting it on fire. The family was asleep at the time and were rescued by the fire department after the house had been on fire for 45 minutes. Damage to the house was around $1,000,000 as it was a total loss, burned to the ground. In Black Hawk County, lightning struck the water treatment plant in Cedar Falls. Power was knocked out, resulting in the discharge of 750,000 gallons of sewage into the Cedar River. Lightning struck the historical depot in Carroll, now the Chamber of Commerce, and caused minor damage to the roof. It also knocked out telephone service to 3 adjacent buildings.
Event Narrative Small branches were down as well as other damage to power lines.


All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 3.299M 65.00K
SCHALLER SAC CO. IA 08/08/2010 19:05 CST-6 Thunderstorm Wind 56 kts. EG 0 0 2.00K 0.00K
SCHALLER SAC CO. IA 08/08/2010 19:10 CST-6 Thunderstorm Wind 61 kts. EG 0 0 300.00K 15.00K
LYTTON CALHOUN CO. IA 08/08/2010 19:25 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
JOLLEY CALHOUN CO. IA 08/08/2010 19:37 CST-6 Thunderstorm Wind 62 kts. MG 0 0 5.00K 50.00K
ROCKWELL CITY CALHOUN CO. IA 08/08/2010 19:41 CST-6 Thunderstorm Wind 54 kts. MG 0 0 3.00K 0.00K
FONDA POCAHONTAS CO. IA 08/08/2010 19:45 CST-6 Thunderstorm Wind 61 kts. EG 0 0 2.00K 0.00K
LAURENS POCAHONTAS CO. IA 08/08/2010 19:45 CST-6 Thunderstorm Wind 57 kts. EG 0 0 15.00K 0.00K
FONDA POCAHONTAS CO. IA 08/08/2010 19:45 CST-6 Thunderstorm Wind 61 kts. EG 0 0 25.00K 0.00K
TEMPLETON CARROLL CO. IA 08/08/2010 19:50 CST-6 Funnel Cloud 0 0 0.00K 0.00K
POMEROY CALHOUN CO. IA 08/08/2010 19:50 CST-6 Thunderstorm Wind 61 kts. EG 0 0 15.00K 0.00K
WELLINGFORD EMMET CO. IA 08/08/2010 19:53 CST-6 Thunderstorm Wind 61 kts. EG 0 0 25.00K 0.00K
GRAETTINGER PALO ALTO CO. IA 08/08/2010 19:58 CST-6 Thunderstorm Wind 57 kts. EG 0 0 25.00K 0.00K
JEFFERSON GREENE CO. IA 08/08/2010 20:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
LYTTON SAC CO. IA 08/08/2010 20:00 CST-6 Flash Flood 0 0 25.00K 0.00K
JEFFERSON GREENE CO. IA 08/08/2010 20:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
CARROLL CARROLL CO. IA 08/08/2010 20:00 CST-6 Lightning 0 0 2.00K 0.00K
ROELYN WEBSTER CO. IA 08/08/2010 20:13 CST-6 Thunderstorm Wind 52 kts. EG 0 0 1.00K 0.00K
ALGONA KOSSUTH CO. IA 08/08/2010 20:22 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
(FOD)FT DODGE MUNI A WEBSTER CO. IA 08/08/2010 20:22 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 0.00K
WELLINGFORD EMMET CO. IA 08/08/2010 20:23 CST-6 Thunderstorm Wind 57 kts. EG 0 0 5.00K 0.00K
DAKOTA CITY HUMBOLDT CO. IA 08/08/2010 20:24 CST-6 Thunderstorm Wind 50 kts. MG 0 0 0.00K 0.00K
EAGLE GROVE WRIGHT CO. IA 08/08/2010 20:41 CST-6 Thunderstorm Wind 50 kts. MG 0 0 0.00K 0.00K
BOONE MUNI ARPT BOONE CO. IA 08/08/2010 20:58 CST-6 Thunderstorm Wind 54 kts. MG 0 0 5.00K 0.00K
EMMETSBURG PALO ALTO CO. IA 08/08/2010 21:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
AMES STORY CO. IA 08/08/2010 21:04 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
WAUKEE DALLAS CO. IA 08/08/2010 21:09 CST-6 Thunderstorm Wind 52 kts. EG 0 0 30.00K 0.00K
COMMERCE POLK CO. IA 08/08/2010 21:15 CST-6 Heavy Rain 0 0 0.00K 0.00K
CARROLL CARROLL CO. IA 08/08/2010 21:15 CST-6 Flash Flood 0 0 100.00K 0.00K
GLIDDEN CARROLL CO. IA 08/08/2010 21:20 CST-6 Flash Flood 0 0 50.00K 0.00K
HAMPTON FRANKLIN CO. IA 08/08/2010 21:25 CST-6 Thunderstorm Wind 57 kts. EG 0 0 20.00K 0.00K
RIPPEY GREENE CO. IA 08/08/2010 21:32 CST-6 Flash Flood 0 0 50.00K 0.00K
MARSHALLTOWN MARSHALL CO. IA 08/08/2010 21:38 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
RIPPEY GREENE CO. IA 08/08/2010 21:45 CST-6 Flash Flood 0 0 50.00K 0.00K
ADEL DALLAS CO. IA 08/08/2010 21:45 CST-6 Lightning 0 0 1.000M 0.00K
BRISTOW BUTLER CO. IA 08/08/2010 21:45 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
MARSHALLTOWN MARSHALL CO. IA 08/08/2010 21:49 CST-6 Thunderstorm Wind 56 kts. EG 0 0 25.00K 0.00K
DES MOINES POLK CO. IA 08/08/2010 22:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
NEWTON JASPER CO. IA 08/08/2010 22:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
BOONE MUNI ARPT BOONE CO. IA 08/08/2010 22:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
DES MOINES POLK CO. IA 08/08/2010 22:10 CST-6 Heavy Rain 0 0 0.00K 0.00K
PLAINFIELD BREMER CO. IA 08/08/2010 22:12 CST-6 Thunderstorm Wind 56 kts. MG 0 0 0.00K 0.00K
BAYARD GUTHRIE CO. IA 08/08/2010 22:20 CST-6 Thunderstorm Wind 52 kts. EG 0 0 1.00K 0.00K
TRIPOLI BREMER CO. IA 08/08/2010 22:30 CST-6 Thunderstorm Wind 52 kts. EG 0 0 2.00K 0.00K
WINDSOR HGTS POLK CO. IA 08/08/2010 22:30 CST-6 Heavy Rain 0 0 0.00K 0.00K
WAUKEE DALLAS CO. IA 08/08/2010 22:33 CST-6 Flash Flood 0 0 25.00K 0.00K
CLOVER HILLS POLK CO. IA 08/08/2010 22:42 CST-6 Heavy Rain 0 0 0.00K 0.00K
CEDAR FALLS BLACK HAWK CO. IA 08/08/2010 22:45 CST-6 Lightning 0 0 50.00K 0.00K
NEVADA STORY CO. IA 08/08/2010 23:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
RIDER POLK CO. IA 08/08/2010 23:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
ALTOONA POLK CO. IA 08/08/2010 23:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
AMES STORY CO. IA 08/08/2010 23:39 CST-6 Heavy Rain 0 0 0.00K 0.00K
ALBIA MONROE CO. IA 08/09/2010 00:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
ERICSON BOONE CO. IA 08/09/2010 00:17 CST-6 Flash Flood 0 0 25.00K 0.00K
WINDSOR HGTS POLK CO. IA 08/09/2010 01:15 CST-6 Flash Flood 0 0 300.00K 0.00K
RIDER POLK CO. IA 08/09/2010 01:25 CST-6 Flash Flood 0 0 25.00K 0.00K
NEWTON JASPER CO. IA 08/09/2010 01:30 CST-6 Heavy Rain 0 0 0.00K 0.00K
WEST DES MOINES POLK CO. IA 08/09/2010 01:59 CST-6 Flash Flood 0 0 75.00K 0.00K
DALLAS CENTER DALLAS CO. IA 08/09/2010 03:00 CST-6 Flash Flood 0 0 25.00K 0.00K
LIDDERDALE CARROLL CO. IA 08/09/2010 03:20 CST-6 Heavy Rain 0 0 0.00K 0.00K
RANDALL HAMILTON CO. IA 08/09/2010 03:32 CST-6 Heavy Rain 0 0 0.00K 0.00K
AMES ARPT STORY CO. IA 08/09/2010 03:41 CST-6 Flash Flood 0 0 5.00K 0.00K
AMES STORY CO. IA 08/09/2010 03:42 CST-6 Flash Flood 0 0 25.00K 0.00K
YOUNGSTOWN POLK CO. IA 08/09/2010 03:42 CST-6 Flash Flood 0 0 500.00K 0.00K
IOWA CENTER STORY CO. IA 08/09/2010 03:42 CST-6 Flash Flood 0 0 25.00K 0.00K
BOONE BOONE CO. IA 08/09/2010 04:03 CST-6 Flash Flood 0 0 50.00K 0.00K
CAMBRIDGE STORY CO. IA 08/09/2010 04:30 CST-6 Flash Flood 0 0 75.00K 0.00K
KELLEY STORY CO. IA 08/09/2010 05:30 CST-6 Flash Flood 0 0 25.00K 0.00K
LAKONTA MAHASKA CO. IA 08/09/2010 05:30 CST-6 Flash Flood 0 0 10.00K 0.00K
GOWRIE WEBSTER CO. IA 08/09/2010 07:02 CST-6 Heavy Rain 0 0 0.00K 0.00K
CAMBRIDGE STORY CO. IA 08/09/2010 07:49 CST-6 Flood 0 0 250.00K 0.00K
AGENCY WAPELLO CO. IA 08/09/2010 09:00 CST-6 Flash Flood 0 0 10.00K 0.00K
Totals: 0 0 3.299M 65.00K