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Storm Events Database
Event Details:
| Event | Tornado |
| -- Scale | EF0 |
| -- Length | 1.46 Miles |
| -- Width | 50 Yards |
| State | IOWA |
| County/Area | HOWARD |
| WFO | ARX |
| Report Source | NWS Storm Survey |
| NCEI Data Source | CSV |
| Begin Date | 2021-12-15 19:21 CST-6 |
| Begin Location | 3S ELMA |
| Begin Lat/Lon | 43.2128/-92.4493 |
| End Date | 2021-12-15 19:22 CST-6 |
| End Location | 2SSE ELMA |
| End Lat/Lon | 43.2302/-92.4327 |
| Deaths Direct/Indirect | 0/0 (fatality details below, when available...) |
| Injuries Direct/Indirect | 0/0 |
| Property Damage | 90.00K |
| Crop Damage | 0.00K |
| Episode Narrative | An intense storm system moved across the Upper Midwest on December 15th and produced a rare severe weather outbreak across northeast Iowa. Eight tornadoes occurred across parts of Floyd, Chickasaw and Howard Counties. Four of these tornadoes were rated EF1 with one moving through Rudd (Floyd County) where the roof was removed from the library and several homes and a church were heavily damaged. The other tornadoes largely moved through rural areas damaging trees, power lines and farm buildings. In addition to the tornadoes, damaging winds occurred that blew over a semi in Floyd (Floyd County) and damaged numerous homes across the region. The Governor of Iowa declared a state of disaster emergency for Allamakee, Chickasaw, Fayette, Floyd, Howard, Mitchell and Winneshiek Counties. A federal disaster was declared for Floyd, Howard and Mitchell Counties. |
| Event Narrative | This tornado formed in Chickasaw County and moved into Howard County south of Elma along County Line Road just east of the Little Wapsipinicon River. The tornado moved rapidly northeast before dissipating south of Elma. Damage from this EF0 tornado was limited to trees and one farm. |
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 | 0 | 3.990M | 0.00K | |||||||
| AUREOLA | FLOYD CO. | IA | 12/15/2021 | 18:54 | CST-6 | Tornado | EF1 | 0 | 0 | 5.00K | 0.00K |
| MARBLE ROCK | FLOYD CO. | IA | 12/15/2021 | 18:55 | CST-6 | Thunderstorm Wind | 69 kts. EG | 0 | 0 | 15.00K | 0.00K |
| MARBLE ROCK | FLOYD CO. | IA | 12/15/2021 | 18:57 | CST-6 | Thunderstorm Wind | 71 kts. EG | 0 | 0 | 2.00K | 0.00K |
| ROSEVILLE | FLOYD CO. | IA | 12/15/2021 | 18:58 | CST-6 | Thunderstorm Wind | 64 kts. EG | 0 | 0 | 2.00K | 0.00K |
| ROSEVILLE | FLOYD CO. | IA | 12/15/2021 | 18:58 | CST-6 | Thunderstorm Wind | 68 kts. EG | 0 | 0 | 10.00K | 0.00K |
| MARBLE ROCK | FLOYD CO. | IA | 12/15/2021 | 18:59 | CST-6 | Tornado | EF1 | 0 | 0 | 490.00K | 0.00K |
| FOLKERTS FLD ARPT | FLOYD CO. | IA | 12/15/2021 | 19:00 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 30.00K | 0.00K |
| FLOYD | FLOYD CO. | IA | 12/15/2021 | 19:03 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 50.00K | 0.00K |
| RUDD | FLOYD CO. | IA | 12/15/2021 | 19:03 | CST-6 | Thunderstorm Wind | 71 kts. EG | 0 | 0 | 2.00K | 0.00K |
| CARRVILLE | FLOYD CO. | IA | 12/15/2021 | 19:04 | CST-6 | Thunderstorm Wind | 65 kts. EG | 0 | 0 | 30.00K | 0.00K |
| MEROA | MITCHELL CO. | IA | 12/15/2021 | 19:05 | CST-6 | Thunderstorm Wind | 67 kts. EG | 0 | 0 | 2.00K | 0.00K |
| CHARLES CITY | FLOYD CO. | IA | 12/15/2021 | 19:06 | CST-6 | Hail | 1.00 in. | 0 | 0 | 0.00K | 0.00K |
| MEROA | MITCHELL CO. | IA | 12/15/2021 | 19:06 | CST-6 | Thunderstorm Wind | 67 kts. EG | 0 | 0 | 15.00K | 0.00K |
| RUDD | FLOYD CO. | IA | 12/15/2021 | 19:06 | CST-6 | Tornado | EF1 | 0 | 0 | 1.150M | 0.00K |
| MITCHELL | MITCHELL CO. | IA | 12/15/2021 | 19:09 | CST-6 | Thunderstorm Wind | 67 kts. EG | 0 | 0 | 75.00K | 0.00K |
| MITCHELL | MITCHELL CO. | IA | 12/15/2021 | 19:09 | CST-6 | Thunderstorm Wind | 60 kts. EG | 0 | 0 | 175.00K | 0.00K |
| OSAGE | MITCHELL CO. | IA | 12/15/2021 | 19:11 | CST-6 | Thunderstorm Wind | 55 kts. EG | 0 | 0 | 40.00K | 0.00K |
| BASSETT | CHICKASAW CO. | IA | 12/15/2021 | 19:15 | CST-6 | Tornado | EF1 | 0 | 0 | 255.00K | 0.00K |
| IONIA | CHICKASAW CO. | IA | 12/15/2021 | 19:15 | CST-6 | Thunderstorm Wind | 55 kts. MG | 0 | 0 | 0.00K | 0.00K |
| DEERFIELD | CHICKASAW CO. | IA | 12/15/2021 | 19:16 | CST-6 | Thunderstorm Wind | 50 kts. EG | 0 | 0 | 2.00K | 0.00K |
| DEERFIELD | CHICKASAW CO. | IA | 12/15/2021 | 19:17 | CST-6 | Tornado | EF0 | 0 | 0 | 330.00K | 0.00K |
| ELMA | HOWARD CO. | IA | 12/15/2021 | 19:20 | CST-6 | Thunderstorm Wind | 51 kts. EG | 0 | 0 | 2.00K | 0.00K |
| ELMA | HOWARD CO. | IA | 12/15/2021 | 19:21 | CST-6 | Tornado | EF0 | 0 | 0 | 90.00K | 0.00K |
| ELMA | HOWARD CO. | IA | 12/15/2021 | 19:22 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 25.00K | 0.00K |
| ELMA | HOWARD CO. | IA | 12/15/2021 | 19:23 | CST-6 | Tornado | EF0 | 0 | 0 | 90.00K | 0.00K |
| DAVIS CORNERS | HOWARD CO. | IA | 12/15/2021 | 19:28 | CST-6 | Thunderstorm Wind | 56 kts. EG | 0 | 0 | 30.00K | 0.00K |
| SCHLEY | HOWARD CO. | IA | 12/15/2021 | 19:29 | CST-6 | Tornado | EF0 | 0 | 0 | 600.00K | 0.00K |
| SCHLEY | HOWARD CO. | IA | 12/15/2021 | 19:30 | CST-6 | Thunderstorm Wind | 54 kts. EG | 0 | 0 | 30.00K | 0.00K |
| SCHLEY | HOWARD CO. | IA | 12/15/2021 | 19:31 | CST-6 | Tornado | EF0 | 0 | 0 | 250.00K | 0.00K |
| VERNON SPGS | HOWARD CO. | IA | 12/15/2021 | 19:34 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 75.00K | 0.00K |
| CRESCO MUNI ARPT | HOWARD CO. | IA | 12/15/2021 | 19:35 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 50.00K | 0.00K |
| LIME SPGS | HOWARD CO. | IA | 12/15/2021 | 19:35 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 25.00K | 0.00K |
| CRESCO MUNI ARPT | HOWARD CO. | IA | 12/15/2021 | 19:37 | CST-6 | Thunderstorm Wind | 51 kts. EG | 0 | 0 | 10.00K | 0.00K |
| BURR OAK | WINNESHIEK CO. | IA | 12/15/2021 | 19:50 | CST-6 | Thunderstorm Wind | 50 kts. EG | 0 | 0 | 3.00K | 0.00K |
| WAUKON | ALLAMAKEE CO. | IA | 12/15/2021 | 20:20 | CST-6 | Thunderstorm Wind | 50 kts. EG | 0 | 0 | 30.00K | 0.00K |
| Totals: | 0 | 0 | 3.990M | 0.00K |
