Storm Events Database

Event Details:

Event Tornado
-- Scale EF0
-- Length 1.66 Miles
-- Width 75 Yards
State IOWA
County/Area GRUNDY
WFO DMX
Report Source Other Federal Agency
NCEI Data Source CSV
Begin Date 2014-08-31 20:35 CST-6
Begin Location 7NW WELLSBURG
Begin Lat/Lon 42.5134/-93.0049
End Date 2014-08-31 20:37 CST-6
End Location 8NNW WELLSBURG
End Lat/Lon 42.5349/-92.9904
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 0.00K
Crop Damage 2.00K
Episode Narrative An unstable airmass was in place across Iowa with afternoon highs reaching well into the 80s, and dewpoint readings in the low to mid 70s. CAPE rose to 2000 to 3000 J/kg. Downdraft CAPE was around 900 to 1000 J/kg, with CAPE in the -10 to -30 C layer of the atmosphere in the 600 to 900 J/kg range. Precipitable water increased to around 1.75 inches. The freezing level was quite high at around 15,000 feet. Fairly strong shear was present with 40 to 50 kts of effective shear by late afternoon. A line of thunderstorms formed ahead of the cold front by late afternoon and moved east across the state through the evening hours. Hail with the storms was generally quite small. One inch diameter hail fell in Crawford County in Dow City. The primary severe events from this system were high winds that occurred as the MCS progressed across the state. Several locations reported gusts of 60 MPH or higher. An 80 MPH gust was reported in Guthrie County at Yale and Bayard. A 71 MPH wind gust occurred in Marion County. Heavy rainfall was also of significance with flash flooding in Crawford County. This was caused by a dam failure which flooded Highway 39. Three inches of rain fell in 50 minutes in Dallas County. There were numerous reports of around 2 inches of rain falling in Boone and Polk Counties. Water ponding and low-land flooding was common. One person was struck by lightning at the Denison Airport. The person received minor injuries. Funnel clouds were sighted in both Crawford and Boone Counties. Additional heavy rainfall events are included on 01 September 2014 entry.
Event Narrative Produced only crop damage along its path. Tornado was found and rated using high resolution satellite imagery.


    

Event Map:

Note: The tornado track is approximate based on the beginning (B) and ending (E) locations. The actual tornado path may differ from a straight line.
Measure
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All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 1 1.575M 575.00K
KENWOOD CRAWFORD CO. IA 08/31/2014 17:00 CST-6 Heavy Rain 0 0 0.00K 0.00K
DOW CITY CRAWFORD CO. IA 08/31/2014 17:24 CST-6 Tornado EF0 0 0 0.00K 5.00K
ODEBOLT SAC CO. IA 08/31/2014 17:44 CST-6 Tornado EF0 0 0 90.00K 7.00K
DOW CITY CRAWFORD CO. IA 08/31/2014 17:45 CST-6 Hail 1.00 in. 0 0 0.00K 10.00K
DENISON CRAWFORD CO. IA 08/31/2014 18:06 CST-6 Thunderstorm Wind 53 kts. EG 0 0 5.00K 0.00K
DENISON CRAWFORD CO. IA 08/31/2014 18:15 CST-6 Thunderstorm Wind 55 kts. EG 0 0 5.00K 0.00K
DENISON MUNI ARPT CRAWFORD CO. IA 08/31/2014 18:15 CST-6 Lightning 0 1 0.00K 0.00K
ASPINWALL CRAWFORD CO. IA 08/31/2014 18:19 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 2.00K
DENISON CRAWFORD CO. IA 08/31/2014 18:19 CST-6 Thunderstorm Wind 52 kts. EG 0 0 10.00K 0.00K
DENISON CRAWFORD CO. IA 08/31/2014 18:21 CST-6 Thunderstorm Wind 61 kts. EG 0 0 10.00K 0.00K
VAIL CRAWFORD CO. IA 08/31/2014 18:23 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 3.00K
CARNARVON SAC CO. IA 08/31/2014 18:25 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 2.00K
VAIL CRAWFORD CO. IA 08/31/2014 18:26 CST-6 Tornado EF0 0 0 0.00K 10.00K
MANNING CARROLL CO. IA 08/31/2014 18:30 CST-6 Thunderstorm Wind 56 kts. EG 0 0 25.00K 0.00K
HALBUR CARROLL CO. IA 08/31/2014 18:34 CST-6 Tornado EF0 0 0 0.00K 7.00K
HALBUR CARROLL CO. IA 08/31/2014 18:38 CST-6 Tornado EF0 0 0 0.00K 10.00K
TEMPLETON CARROLL CO. IA 08/31/2014 18:40 CST-6 Thunderstorm Wind 56 kts. EG 0 0 15.00K 0.00K
DENISON CRAWFORD CO. IA 08/31/2014 18:42 CST-6 Flash Flood 0 0 250.00K 50.00K
CARROLL CARROLL CO. IA 08/31/2014 18:45 CST-6 Tornado EF0 0 0 0.00K 10.00K
MANNING CARROLL CO. IA 08/31/2014 18:45 CST-6 Thunderstorm Wind 52 kts. EG 0 0 3.00K 0.00K
MT CARMEL CARROLL CO. IA 08/31/2014 18:51 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
WIGHTMAN CALHOUN CO. IA 08/31/2014 18:51 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
POCAHONTAS POCAHONTAS CO. IA 08/31/2014 18:53 CST-6 Thunderstorm Wind 59 kts. MG 0 0 0.00K 0.00K
GLIDDEN CARROLL CO. IA 08/31/2014 18:57 CST-6 Tornado EF0 0 0 2.00K 7.00K
WIGHTMAN CALHOUN CO. IA 08/31/2014 18:58 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
WIGHTMAN CALHOUN CO. IA 08/31/2014 19:00 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 2.00K
ADAZA GREENE CO. IA 08/31/2014 19:02 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 2.00K
LOHRVILLE CALHOUN CO. IA 08/31/2014 19:02 CST-6 Thunderstorm Wind 56 kts. EG 0 0 0.00K 2.00K
RALSTON GREENE CO. IA 08/31/2014 19:02 CST-6 Tornado EF0 0 0 0.00K 5.00K
BAYARD GUTHRIE CO. IA 08/31/2014 19:04 CST-6 Thunderstorm Wind 56 kts. EG 0 0 15.00K 0.00K
ADAIR CALHOUN CO. IA 08/31/2014 19:05 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
ADAZA GREENE CO. IA 08/31/2014 19:05 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
LOHRVILLE CALHOUN CO. IA 08/31/2014 19:08 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
ADAZA GREENE CO. IA 08/31/2014 19:09 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
ADAZA GREENE CO. IA 08/31/2014 19:10 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
LOHRVILLE CALHOUN CO. IA 08/31/2014 19:10 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 1.00K
SOMERS CALHOUN CO. IA 08/31/2014 19:10 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
CHURDAN GREENE CO. IA 08/31/2014 19:11 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 3.00K
FARLIN GREENE CO. IA 08/31/2014 19:11 CST-6 Tornado EF0 0 0 1.00K 5.00K
AUDUBON AUDUBON CO. IA 08/31/2014 19:12 CST-6 Thunderstorm Wind 50 kts. MG 0 0 0.00K 0.00K
BAYARD GUTHRIE CO. IA 08/31/2014 19:15 CST-6 Thunderstorm Wind 70 kts. EG 0 0 25.00K 50.00K
CHURDAN GREENE CO. IA 08/31/2014 19:15 CST-6 Tornado EF0 0 0 1.00K 5.00K
FANSLERS GUTHRIE CO. IA 08/31/2014 19:15 CST-6 Thunderstorm Wind 69 kts. EG 0 0 15.00K 100.00K
HERNDON GUTHRIE CO. IA 08/31/2014 19:15 CST-6 Thunderstorm Wind 70 kts. EG 0 0 50.00K 50.00K
JEFFERSON GREENE CO. IA 08/31/2014 19:15 CST-6 Thunderstorm Wind 52 kts. EG 0 0 15.00K 0.00K
FARNHAMVILLE CALHOUN CO. IA 08/31/2014 19:16 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
JEFFERSON GREENE CO. IA 08/31/2014 19:16 CST-6 Thunderstorm Wind 56 kts. EG 0 0 30.00K 0.00K
FARNHAMVILLE CALHOUN CO. IA 08/31/2014 19:17 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
JAMAICA GUTHRIE CO. IA 08/31/2014 19:17 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
FARNHAMVILLE CALHOUN CO. IA 08/31/2014 19:18 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
FARNHAMVILLE WEBSTER CO. IA 08/31/2014 19:18 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
FARNHAMVILLE WEBSTER CO. IA 08/31/2014 19:18 CST-6 Thunderstorm Wind 43 kts. EG 0 0 0.00K 1.00K
FARNHAMVILLE WEBSTER CO. IA 08/31/2014 19:19 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
FARNHAMVILLE WEBSTER CO. IA 08/31/2014 19:19 CST-6 Tornado EF0 0 0 0.00K 6.00K
FARNHAMVILLE CALHOUN CO. IA 08/31/2014 19:19 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
FARNHAMVILLE WEBSTER CO. IA 08/31/2014 19:19 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
LENA WEBSTER CO. IA 08/31/2014 19:19 CST-6 Tornado EF0 0 0 1.00K 5.00K
BAGLEY GUTHRIE CO. IA 08/31/2014 19:20 CST-6 Thunderstorm Wind 56 kts. EG 0 0 5.00K 0.00K
FARNHAMVILLE WEBSTER CO. IA 08/31/2014 19:20 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
FARNHAMVILLE WEBSTER CO. IA 08/31/2014 19:22 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
FARNHAMVILLE WEBSTER CO. IA 08/31/2014 19:22 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
ROBERTS WEBSTER CO. IA 08/31/2014 19:22 CST-6 Tornado EF0 0 0 0.00K 3.00K
FARNHAMVILLE WEBSTER CO. IA 08/31/2014 19:23 CST-6 Thunderstorm Wind 60 kts. EG 0 0 10.00K 0.00K
LENA WEBSTER CO. IA 08/31/2014 19:23 CST-6 Thunderstorm Wind 43 kts. EG 0 0 0.00K 1.00K
LANYON WEBSTER CO. IA 08/31/2014 19:24 CST-6 Tornado EF0 0 0 2.00K 8.00K
GOWRIE WEBSTER CO. IA 08/31/2014 19:26 CST-6 Tornado EF0 0 0 0.00K 5.00K
HARCOURT WEBSTER CO. IA 08/31/2014 19:30 CST-6 Thunderstorm Wind 70 kts. EG 0 0 50.00K 50.00K
PANTHER DALLAS CO. IA 08/31/2014 19:31 CST-6 Tornado EF0 0 0 0.00K 4.00K
BERKLEY BOONE CO. IA 08/31/2014 19:33 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 0.00K
DAYTON WEBSTER CO. IA 08/31/2014 19:35 CST-6 Tornado EF1 0 0 200.00K 7.00K
LUTHER BOONE CO. IA 08/31/2014 19:38 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
MOINGONA BOONE CO. IA 08/31/2014 19:38 CST-6 Funnel Cloud 0 0 0.00K 0.00K
BOUTON DALLAS CO. IA 08/31/2014 19:39 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
DAWSON DALLAS CO. IA 08/31/2014 19:40 CST-6 Heavy Rain 0 0 0.00K 0.00K
LEHIGH WEBSTER CO. IA 08/31/2014 19:40 CST-6 Tornado EF1 0 0 0.00K 1.00K
PERRY DALLAS CO. IA 08/31/2014 19:40 CST-6 Thunderstorm Wind 50 kts. MG 0 0 0.00K 0.00K
STRATFORD HAMILTON CO. IA 08/31/2014 19:40 CST-6 Tornado EF0 0 0 0.00K 4.00K
WOODWARD DALLAS CO. IA 08/31/2014 19:41 CST-6 Thunderstorm Wind 43 kts. EG 0 0 0.00K 1.00K
HOMER HAMILTON CO. IA 08/31/2014 19:42 CST-6 Tornado EF0 0 0 0.00K 2.00K
STANHOPE HAMILTON CO. IA 08/31/2014 19:42 CST-6 Tornado EF0 0 0 1.00K 6.00K
MACKEY BOONE CO. IA 08/31/2014 19:43 CST-6 Tornado EF1 0 0 0.00K 4.00K
MADRID BOONE CO. IA 08/31/2014 19:45 CST-6 Heavy Rain 0 0 0.00K 0.00K
STANHOPE HAMILTON CO. IA 08/31/2014 19:46 CST-6 Tornado EF0 0 0 0.00K 4.00K
ROSEDALE HAMILTON CO. IA 08/31/2014 19:47 CST-6 Tornado EF0 0 0 1.00K 2.00K
ADEL DALLAS CO. IA 08/31/2014 19:50 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
KAMRAR HAMILTON CO. IA 08/31/2014 19:50 CST-6 Tornado EF0 0 0 95.00K 5.00K
KAMRAR HAMILTON CO. IA 08/31/2014 19:52 CST-6 Tornado EF0 0 0 75.00K 4.00K
DALLAS CENTER DALLAS CO. IA 08/31/2014 19:55 CST-6 Thunderstorm Wind 52 kts. EG 0 0 10.00K 0.00K
DALLAS CENTER DALLAS CO. IA 08/31/2014 19:56 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 0.00K
CLEAR LAKE LAKE CERRO GORDO CO. IA 08/31/2014 19:57 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
ELLSWORTH HAMILTON CO. IA 08/31/2014 19:57 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
DALLAS CENTER DALLAS CO. IA 08/31/2014 19:58 CST-6 Thunderstorm Wind 71 kts. EG 0 0 25.00K 0.00K
DALLAS CENTER ARPT DALLAS CO. IA 08/31/2014 19:58 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 0.00K
KAMRAR HAMILTON CO. IA 08/31/2014 19:58 CST-6 Tornado EF0 0 0 0.00K 2.00K
BLAIRSBURG HAMILTON CO. IA 08/31/2014 19:59 CST-6 Tornado EF0 0 0 0.00K 1.00K
ELLSWORTH HAMILTON CO. IA 08/31/2014 19:59 CST-6 Thunderstorm Wind 56 kts. EG 0 0 10.00K 0.00K
ELLSWORTH HAMILTON CO. IA 08/31/2014 20:00 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 0.00K
BABCOCK BREMER CO. IA 08/31/2014 20:01 CST-6 Tornado EF0 0 0 0.00K 2.00K
GALT WRIGHT CO. IA 08/31/2014 20:01 CST-6 Tornado EF0 0 0 25.00K 7.00K
MADRID BOONE CO. IA 08/31/2014 20:03 CST-6 Heavy Rain 0 0 0.00K 0.00K
ROLAND STORY CO. IA 08/31/2014 20:05 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 0.00K
WILLIAMS HAMILTON CO. IA 08/31/2014 20:06 CST-6 Tornado EF0 0 0 0.00K 2.00K
OAKLAND FRANKLIN CO. IA 08/31/2014 20:07 CST-6 Tornado EF0 0 0 0.00K 2.00K
WILLIAMS HAMILTON CO. IA 08/31/2014 20:08 CST-6 Tornado EF0 0 0 10.00K 4.00K
BUCKEYE HARDIN CO. IA 08/31/2014 20:09 CST-6 Tornado EF1 0 0 100.00K 5.00K
BUCKEYE HARDIN CO. IA 08/31/2014 20:11 CST-6 Tornado EF0 0 0 0.00K 1.00K
BUCKEYE HARDIN CO. IA 08/31/2014 20:15 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
IOWA FALLS MUNI ARPT HARDIN CO. IA 08/31/2014 20:18 CST-6 Tornado EF0 0 0 0.00K 2.00K
IOWA FALLS MUNI ARPT HARDIN CO. IA 08/31/2014 20:18 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
OWASA HARDIN CO. IA 08/31/2014 20:18 CST-6 Tornado EF1 0 0 25.00K 4.00K
IOWA FALLS MUNI ARPT HARDIN CO. IA 08/31/2014 20:19 CST-6 Thunderstorm Wind 48 kts. EG 0 0 0.00K 1.00K
MORAN DALLAS CO. IA 08/31/2014 20:20 CST-6 Thunderstorm Wind 56 kts. MG 0 0 5.00K 0.00K
ARBOR HILL ADAIR CO. IA 08/31/2014 20:23 CST-6 Tornado EF0 0 0 0.00K 1.00K
IOWA FALLS MUNI ARPT HARDIN CO. IA 08/31/2014 20:25 CST-6 Thunderstorm Wind 57 kts. MG 0 0 5.00K 0.00K
URBANDALE POLK CO. IA 08/31/2014 20:25 CST-6 Thunderstorm Wind 52 kts. EG 0 0 3.00K 0.00K
SLATER STORY CO. IA 08/31/2014 20:26 CST-6 Thunderstorm Wind 52 kts. EG 0 0 5.00K 0.00K
CLEVES HARDIN CO. IA 08/31/2014 20:34 CST-6 Thunderstorm Wind 52 kts. MG 0 0 0.00K 0.00K
WELLSBURG GRUNDY CO. IA 08/31/2014 20:35 CST-6 Tornado EF0 0 0 0.00K 2.00K
STEAMBOAT ROCK HARDIN CO. IA 08/31/2014 20:36 CST-6 Thunderstorm Wind 52 kts. MG 0 0 0.00K 0.00K
APLINGTON BUTLER CO. IA 08/31/2014 20:39 CST-6 Tornado EF0 0 0 20.00K 2.00K
WELLSBURG GRUNDY CO. IA 08/31/2014 20:40 CST-6 Thunderstorm Wind 56 kts. EG 0 0 5.00K 0.00K
WELLSBURG GRUNDY CO. IA 08/31/2014 20:41 CST-6 Thunderstorm Wind 60 kts. EG 0 0 5.00K 0.00K
HOLLAND GRUNDY CO. IA 08/31/2014 20:45 CST-6 Thunderstorm Wind 61 kts. EG 0 0 100.00K 25.00K
ALTOONA POLK CO. IA 08/31/2014 20:49 CST-6 Thunderstorm Wind 56 kts. EG 0 0 3.00K 0.00K
PARKERSBURG BUTLER CO. IA 08/31/2014 20:49 CST-6 Tornado EF0 0 0 0.00K 3.00K
NEW ALBION BUTLER CO. IA 08/31/2014 20:51 CST-6 Tornado EF0 0 0 0.00K 2.00K
SWANTON BUTLER CO. IA 08/31/2014 20:53 CST-6 Thunderstorm Wind 52 kts. EG 0 0 0.00K 1.00K
SHELL ROCK BUTLER CO. IA 08/31/2014 21:00 CST-6 Tornado EF0 0 0 0.00K 1.00K
JANESVILLE BREMER CO. IA 08/31/2014 21:02 CST-6 Tornado EF0 0 0 1.00K 2.00K
FARMER BLACK HAWK CO. IA 08/31/2014 21:04 CST-6 Tornado EF0 0 0 1.00K 2.00K
PERRY DALLAS CO. IA 08/31/2014 21:06 CST-6 Flash Flood 0 0 50.00K 0.00K
MINBURN DALLAS CO. IA 08/31/2014 21:08 CST-6 Flash Flood 0 0 10.00K 0.00K
BOIES BLACK HAWK CO. IA 08/31/2014 21:12 CST-6 Tornado EF0 0 0 0.00K 2.00K
CARNEY POLK CO. IA 08/31/2014 21:14 CST-6 Heavy Rain 0 0 0.00K 0.00K
POLK CITY POLK CO. IA 08/31/2014 21:15 CST-6 Heavy Rain 0 0 0.00K 0.00K
KNITTEL BREMER CO. IA 08/31/2014 21:17 CST-6 Tornado EF0 0 0 0.00K 2.00K
MINBURN DALLAS CO. IA 08/31/2014 21:20 CST-6 Flash Flood 0 0 50.00K 0.00K
NORWALK WARREN CO. IA 08/31/2014 21:30 CST-6 Flash Flood 0 0 5.00K 0.00K
FT DES MOINES POLK CO. IA 08/31/2014 21:43 CST-6 Flash Flood 0 0 75.00K 0.00K
PRAIRIE CITY JASPER CO. IA 08/31/2014 21:48 CST-6 Thunderstorm Wind 51 kts. MG 0 0 0.00K 0.00K
GRIMES POLK CO. IA 08/31/2014 21:50 CST-6 Heavy Rain 0 0 0.00K 0.00K
SAYDELL POLK CO. IA 08/31/2014 21:50 CST-6 Flash Flood 0 0 5.00K 0.00K
KNOXVILLE ARPT MARION CO. IA 08/31/2014 22:05 CST-6 Thunderstorm Wind 62 kts. MG 0 0 10.00K 0.00K
WINDSOR HGTS POLK CO. IA 08/31/2014 23:59 CST-6 Heavy Rain 0 0 0.00K 0.00K
Totals: 0 1 1.575M 575.00K