Storm Events Database
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Storm Events Database
Event Details:
| Event | Tornado |
| -- Scale | EFU |
| -- Length | 0.49 Miles |
| -- Width | 15 Yards |
| State | IOWA |
| County/Area | WEBSTER |
| WFO | DMX |
| Report Source | Other Federal Agency |
| NCEI Data Source | CSV |
| Begin Date | 2021-08-08 23:06 CST-6 |
| Begin Location | 2E HARCOURT |
| Begin Lat/Lon | 42.274/-94.1342 |
| End Date | 2021-08-08 23:07 CST-6 |
| End Location | 3E HARCOURT |
| End Lat/Lon | 42.268/-94.1288 |
| Deaths Direct/Indirect | 0/0 (fatality details below, when available...) |
| Injuries Direct/Indirect | 0/0 |
| Property Damage | 0.00K |
| Crop Damage | 0.20K |
| Episode Narrative | Five tornadoes occurred in Webster county during the late evening hours as a lone supercell moved southeast. They tornadoes remained in rural areas with damage confined to crops. The aforementioned supercell began hours earlier in eastern South Dakota/SW Minnesota and trekked to the SE along the SB/MUCAPE gradients within a supportive environment for continued maintenance and rotation. Vicinity MUCAPE values were 2000-3000 J/kg, effective bulk shear 35-40+ kts, LCL values under 1000m, effective helicity around 100-200 m2/s2. Additionally, SBCIN values increased to the S/W/SW of the storm, aiding in allowing it to exist largely by its lonesome. |
| Event Narrative | Weak tornado occurred east of Harcourt and remained in rural areas. Path was determined using high resolution satellite data. No damage indicators were impacted, hence the EFU rating. |
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 | 0.00K | 4.20K | |||||||
| FONDA | POCAHONTAS CO. | IA | 08/08/2021 | 19:41 | CST-6 | Funnel Cloud | 0 | 0 | 0.00K | 0.00K | |
| FONDA | POCAHONTAS CO. | IA | 08/08/2021 | 19:49 | CST-6 | Funnel Cloud | 0 | 0 | 0.00K | 0.00K | |
| FONDA | POCAHONTAS CO. | IA | 08/08/2021 | 19:56 | CST-6 | Funnel Cloud | 0 | 0 | 0.00K | 0.00K | |
| PALMER | POCAHONTAS CO. | IA | 08/08/2021 | 20:09 | CST-6 | Funnel Cloud | 0 | 0 | 0.00K | 0.00K | |
| MOORLAND NESLER ARPT | WEBSTER CO. | IA | 08/08/2021 | 22:00 | CST-6 | Tornado | EFU | 0 | 0 | 0.00K | 1.00K |
| LINDGREN | WEBSTER CO. | IA | 08/08/2021 | 22:19 | CST-6 | Tornado | EFU | 0 | 0 | 0.00K | 1.00K |
| PALM GROVE | WEBSTER CO. | IA | 08/08/2021 | 22:47 | CST-6 | Tornado | EFU | 0 | 0 | 0.00K | 1.00K |
| HARCOURT | WEBSTER CO. | IA | 08/08/2021 | 23:02 | CST-6 | Tornado | EFU | 0 | 0 | 0.00K | 1.00K |
| HARCOURT | WEBSTER CO. | IA | 08/08/2021 | 23:06 | CST-6 | Tornado | EFU | 0 | 0 | 0.00K | 0.20K |
| Totals: | 0 | 0 | 0.00K | 4.20K |
