Storm Events Database
- Data Access
- Search
- Bulk Data Download (CSV)
- Storm Data Publication
- Documentation
- Database Details
- Version History
- Storm Data FAQ
- NOAA's NWS Documentation
- Tornado EF Scale
- External Resources
- NOAA's SPC Reports
- NOAA's SPC WCM Page
- NOAA's NWS Damage Assessment Toolkit
- NOAA's Tsunami Database
- ESRI/FEMA Civil Air Patrol Images
- SHELDUS
- USDA Cause of Loss Data
Storm Events Database
Event Details:
| Event | Tornado |
| -- Scale | EF1 |
| -- Length | 4.38 Miles |
| -- Width | 100 Yards |
| State | IOWA |
| County/Area | MARION |
| WFO | DMX |
| Report Source | NWS Storm Survey |
| NCEI Data Source | CSV |
| Begin Date | 2015-11-11 15:42 CST-6 |
| Begin Location | 1SW KNOXVILLE ARPT |
| Begin Lat/Lon | 41.29/-93.1315 |
| End Date | 2015-11-11 15:47 CST-6 |
| End Location | 2ENE KNOXVILLE |
| End Lat/Lon | 41.3292/-93.0651 |
| Deaths Direct/Indirect | 0/0 (fatality details below, when available...) |
| Injuries Direct/Indirect | 1/0 |
| Property Damage | 350.00K |
| Crop Damage | 0.00K |
| Episode Narrative | Widespread wind and tornado damage occurred in central Iowa as a result of a low pressure system that raced across the state. Originally, the low pressure center developed in eastern/southeastern Colorado late Tuesday/early Wednesday and proceeded to quickly move east-northeast across Kansas before taking a more northeasterly turn as it approached southwest Iowa. Throughout the event, MUCAPE values were generally in the neighborhood of 500 J/kg. Shear values were supportive with 0-1km values and 0-6km values around 35kts and 85-90kts respectively. SRH values were also very supportive with 0-1km and 0-3km values around 350 m2/s2 and 500 m2/s2 respectively. With the speed of the system and the ample support, resulting storms were fast moving, in excess of 40mph, and of the low topped supercell variety before transitioning into a linear system as the event progressed. |
| Event Narrative | A high-end EF-1 tornado touched down southwest of Knoxville and traveled through the southeast side of town. Damage occurred along its path through town. One injury was reported. |
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.
All events for this episode:
| Location | County/Zone | St. | Date | Time | T.Z. | Type | Mag | Dth | Inj | PrD | CrD |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Totals: | 0 | 1 | 2.011M | 1.00K | |||||||
| CONWAY | TAYLOR CO. | IA | 11/11/2015 | 14:00 | CST-6 | Tornado | EF0 | 0 | 0 | 80.00K | 0.00K |
| MT ETNA | ADAMS CO. | IA | 11/11/2015 | 14:05 | CST-6 | Funnel Cloud | 0 | 0 | 0.00K | 0.00K | |
| DELPHOS | RINGGOLD CO. | IA | 11/11/2015 | 14:09 | CST-6 | Tornado | EF1 | 0 | 0 | 125.00K | 0.00K |
| CLEARFIELD | RINGGOLD CO. | IA | 11/11/2015 | 14:10 | CST-6 | Tornado | EF1 | 0 | 0 | 200.00K | 0.00K |
| STRINGTOWN | ADAMS CO. | IA | 11/11/2015 | 14:15 | CST-6 | Thunderstorm Wind | 50 kts. EG | 0 | 0 | 25.00K | 0.00K |
| KENT | UNION CO. | IA | 11/11/2015 | 14:17 | CST-6 | Tornado | EF1 | 0 | 0 | 125.00K | 0.00K |
| BRIDGEWATER | ADAIR CO. | IA | 11/11/2015 | 14:20 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 25.00K | 0.00K |
| MANNING | CARROLL CO. | IA | 11/11/2015 | 14:30 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 0.00K | 0.00K |
| MANNING | CARROLL CO. | IA | 11/11/2015 | 14:31 | CST-6 | Tornado | EF0 | 0 | 0 | 0.00K | 1.00K |
| KELLERTON | RINGGOLD CO. | IA | 11/11/2015 | 14:33 | CST-6 | Thunderstorm Wind | 65 kts. EG | 0 | 0 | 75.00K | 0.00K |
| BEACONSFIELD | RINGGOLD CO. | IA | 11/11/2015 | 14:35 | CST-6 | Tornado | EF0 | 0 | 0 | 0.00K | 0.00K |
| GRAND RIVER | DECATUR CO. | IA | 11/11/2015 | 14:39 | CST-6 | Tornado | EF1 | 0 | 0 | 5.00K | 0.00K |
| MENLO | GUTHRIE CO. | IA | 11/11/2015 | 14:44 | CST-6 | Hail | 0.88 in. | 0 | 0 | 0.00K | 0.00K |
| BARNEY | MADISON CO. | IA | 11/11/2015 | 14:49 | CST-6 | Tornado | EF0 | 0 | 0 | 3.00K | 0.00K |
| PITZER | MADISON CO. | IA | 11/11/2015 | 14:51 | CST-6 | Tornado | EF1 | 0 | 0 | 25.00K | 0.00K |
| WINTERSET | MADISON CO. | IA | 11/11/2015 | 14:56 | CST-6 | Tornado | EF0 | 0 | 0 | 5.00K | 0.00K |
| FANSLERS | GUTHRIE CO. | IA | 11/11/2015 | 14:57 | CST-6 | Tornado | EF0 | 0 | 0 | 5.00K | 0.00K |
| LAKE CITY | CALHOUN CO. | IA | 11/11/2015 | 14:57 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 0.00K | 0.00K |
| SEWAL | WAYNE CO. | IA | 11/11/2015 | 14:57 | CST-6 | Tornado | EF0 | 0 | 0 | 0.00K | 0.00K |
| KENNEDY | DALLAS CO. | IA | 11/11/2015 | 14:59 | CST-6 | Tornado | EF1 | 0 | 0 | 10.00K | 0.00K |
| CORYDON | WAYNE CO. | IA | 11/11/2015 | 15:05 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 5.00K | 0.00K |
| ADEL | DALLAS CO. | IA | 11/11/2015 | 15:15 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 10.00K | 0.00K |
| BEVINGTON | MADISON CO. | IA | 11/11/2015 | 15:15 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 50.00K | 0.00K |
| CONFIDENCE | WAYNE CO. | IA | 11/11/2015 | 15:19 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 30.00K | 0.00K |
| CUMMING | WARREN CO. | IA | 11/11/2015 | 15:19 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 10.00K | 0.00K |
| INDIANOLA | WARREN CO. | IA | 11/11/2015 | 15:20 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 0.00K | 0.00K |
| GRIFFINSVILLE | APPANOOSE CO. | IA | 11/11/2015 | 15:22 | CST-6 | Tornado | EF2 | 0 | 0 | 200.00K | 0.00K |
| ROCKWELL CITY | CALHOUN CO. | IA | 11/11/2015 | 15:23 | CST-6 | Thunderstorm Wind | 51 kts. MG | 0 | 0 | 0.00K | 0.00K |
| CUMMING | WARREN CO. | IA | 11/11/2015 | 15:26 | CST-6 | Thunderstorm Wind | 48 kts. EG | 0 | 0 | 10.00K | 0.00K |
| (DSM)DES MOINES INTL | POLK CO. | IA | 11/11/2015 | 15:27 | CST-6 | Tornado | EF0 | 0 | 0 | 25.00K | 0.00K |
| MELROSE | MONROE CO. | IA | 11/11/2015 | 15:28 | CST-6 | Tornado | EF2 | 0 | 0 | 150.00K | 0.00K |
| LOVINGTON | POLK CO. | IA | 11/11/2015 | 15:31 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 10.00K | 0.00K |
| SAYDELL | POLK CO. | IA | 11/11/2015 | 15:32 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 25.00K | 0.00K |
| CENTERVILLE | APPANOOSE CO. | IA | 11/11/2015 | 15:35 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 15.00K | 0.00K |
| COLUMBIA | MARION CO. | IA | 11/11/2015 | 15:37 | CST-6 | Thunderstorm Wind | 50 kts. EG | 0 | 0 | 20.00K | 0.00K |
| NORWOODVILLE | POLK CO. | IA | 11/11/2015 | 15:37 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 25.00K | 0.00K |
| PRAIRIE CITY | JASPER CO. | IA | 11/11/2015 | 15:38 | CST-6 | Thunderstorm Wind | 52 kts. MG | 0 | 0 | 0.00K | 0.00K |
| ALLEMAN | POLK CO. | IA | 11/11/2015 | 15:41 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 10.00K | 0.00K |
| ALTOONA | POLK CO. | IA | 11/11/2015 | 15:42 | CST-6 | Heavy Rain | 0 | 0 | 0.00K | 0.00K | |
| KNOXVILLE ARPT | MARION CO. | IA | 11/11/2015 | 15:42 | CST-6 | Tornado | EF1 | 0 | 1 | 350.00K | 0.00K |
| NAPIER | BOONE CO. | IA | 11/11/2015 | 15:42 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 75.00K | 0.00K |
| PRAIRIE CITY | JASPER CO. | IA | 11/11/2015 | 15:43 | CST-6 | Thunderstorm Wind | 70 kts. EG | 0 | 0 | 60.00K | 0.00K |
| ALBIA | MONROE CO. | IA | 11/11/2015 | 15:44 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 0.00K | 0.00K |
| HOCKING | MONROE CO. | IA | 11/11/2015 | 15:44 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 0.00K | 0.00K |
| AMES | STORY CO. | IA | 11/11/2015 | 15:49 | CST-6 | Thunderstorm Wind | 59 kts. MG | 0 | 0 | 0.00K | 0.00K |
| AVERY | MONROE CO. | IA | 11/11/2015 | 15:50 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 25.00K | 0.00K |
| NEWTON | JASPER CO. | IA | 11/11/2015 | 15:50 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 5.00K | 0.00K |
| SHARON | APPANOOSE CO. | IA | 11/11/2015 | 15:55 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 5.00K | 0.00K |
| FLORIS | DAVIS CO. | IA | 11/11/2015 | 16:13 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 10.00K | 0.00K |
| (OTM)OTTUMWA INDSTRL | WAPELLO CO. | IA | 11/11/2015 | 16:14 | CST-6 | Thunderstorm Wind | 51 kts. MG | 0 | 0 | 0.00K | 0.00K |
| OTTUMWA | WAPELLO CO. | IA | 11/11/2015 | 16:15 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 15.00K | 0.00K |
| PICKERING | MARSHALL CO. | IA | 11/11/2015 | 16:15 | CST-6 | Tornado | EF0 | 0 | 0 | 1.00K | 0.00K |
| ROSE HILL | MAHASKA CO. | IA | 11/11/2015 | 16:16 | CST-6 | Tornado | EF0 | 0 | 0 | 1.00K | 0.00K |
| (OTM)OTTUMWA INDSTRL | WAPELLO CO. | IA | 11/11/2015 | 16:18 | CST-6 | Thunderstorm Wind | 51 kts. MG | 0 | 0 | 0.00K | 0.00K |
| INDIANAPOLIS | MAHASKA CO. | IA | 11/11/2015 | 16:20 | CST-6 | Tornado | EF2 | 0 | 0 | 75.00K | 0.00K |
| MONTEZUMA SIG ARPT | POWESHIEK CO. | IA | 11/11/2015 | 16:28 | CST-6 | Tornado | EF0 | 0 | 0 | 1.00K | 0.00K |
| CEDAR FALLS ISLEY AR | BLACK HAWK CO. | IA | 11/11/2015 | 17:04 | CST-6 | Thunderstorm Wind | 65 kts. EG | 0 | 0 | 75.00K | 0.00K |
| GILBERTVILLE | BLACK HAWK CO. | IA | 11/11/2015 | 17:11 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 10.00K | 0.00K |
| ALGONA MUNI ARPT | KOSSUTH CO. | IA | 11/11/2015 | 18:45 | CST-6 | Heavy Rain | 0 | 0 | 0.00K | 0.00K | |
| Totals: | 0 | 1 | 2.011M | 1.00K |
