Storm Events Database
- Data Access
- Search
- FTP Access
- Database Download
- Storm Data Publication
- Documentation
- Storm Data FAQ
- Storm Data Preparation
- Tornado EF Scale
- External Resources
- NOAA's SPC Reports
- NOAA's SPC WCM Page
- SHELDUS
Storm Events Database
Event Details
| Event | Thunderstorm Wind |
| Magnitude | 52 kts. |
| State | IOWA |
| County/Area | SAC |
| WFO | DMX |
| Begin Date | 07/01/2011 18:20:00 CST-6 |
| Begin Range | 1 |
| Begin Azimuth | SE |
| Begin Location | LAKE VIEW |
| Begin Lat/Lon | 42.31/-95.03 |
| End Date | 07/01/2011 18:20:00 CST-6 |
| Deaths Direct/Indirect | 0/0 (fatality details below, when available...) |
| Injuries Direct/Indirect | 0/0 |
| Property Damage | 10.00K |
| Crop Damage | 0.00K |
| Episode Narrative | Very warm and humid air was in place over Iowa during the 30th and the 1st with high temperatures in the 90s and dew points in the mid 70s to low 80s. The airmass was capped on the 30th, and remained fairly capped on the evening of the 1st as a cold front moves southeast into the state. The cap weakened first over northern Iowa and then gradually farther to the south as the night progressed. The freezing level was quite high, in the 14,500 to 15,000 foot range. In spite of CAPE values in the -10 to -30 C layer of the atmosphere in the 400 to 700 J/kg range, hail production was limited with only spot reports of golf ball to ping pong ball size hail. Precipitable water increased to around 1.5 inches during the evening. CAPE was around 4000 J/kg, with the lifted index around -10 C. A narrow line of thunderstorms formed along the cold front with the main mode of severe weather being high winds. Downdraft CAPE was high, around 1500 J/kg. This resulted in wind of 60 to 70 MPH at several locations. The factor against the stronger storm development was the lack of shear, with only 20 kts available. There were numerous reports of trees and power lines being downed by the high winds. A boat was blown from a dock into a house in the Clear Lake area. Windows were also blown out of a house there as well. Power was knocked out to about 1000 customers in the Mason City, Clear Lake Area. |
| Event Narrative | A large branch fell onto a car causing significant damage. |
All events for this episode:
| Location | County/Zone | St. | Date | Time | T.Z. | Type | Mag | Dth | Inj | PrD | CrD |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Totals: | 0 | 0 | 358.00K | 75.00K | |||||||
| DELOIT | CRAWFORD CO. | IA | 07/01/2011 | 17:55 | CST-6 | Hail | 1.75 in. | 0 | 0 | 20.00K | 10.00K |
| MAPLE HILL | EMMET CO. | IA | 07/01/2011 | 18:20 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 5.00K | 0.00K |
| LAKE VIEW | SAC CO. | IA | 07/01/2011 | 18:20 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 10.00K | 0.00K |
| YETTER | CALHOUN CO. | IA | 07/01/2011 | 18:45 | CST-6 | Hail | 0.88 in. | 0 | 0 | 0.00K | 10.00K |
| SWEA CITY | KOSSUTH CO. | IA | 07/01/2011 | 19:10 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 15.00K | 0.00K |
| ROLFE | POCAHONTAS CO. | IA | 07/01/2011 | 19:20 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 10.00K | 0.00K |
| THOMPSON | WINNEBAGO CO. | IA | 07/01/2011 | 20:00 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 25.00K | 5.00K |
| LAKE MILLS | WINNEBAGO CO. | IA | 07/01/2011 | 20:00 | CST-6 | Hail | 1.50 in. | 0 | 0 | 15.00K | 10.00K |
| LOHRVILLE | CALHOUN CO. | IA | 07/01/2011 | 20:03 | CST-6 | Hail | 0.88 in. | 0 | 0 | 3.00K | 10.00K |
| NORTHWOOD | WORTH CO. | IA | 07/01/2011 | 20:16 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 25.00K | 0.00K |
| OTHO | WEBSTER CO. | IA | 07/01/2011 | 20:26 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 10.00K | 0.00K |
| CLEAR LAKE | CERRO GORDO CO. | IA | 07/01/2011 | 20:40 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 10.00K | 0.00K |
| CLEAR LAKE | CERRO GORDO CO. | IA | 07/01/2011 | 20:40 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 125.00K | 0.00K |
| CLEAR LAKE | CERRO GORDO CO. | IA | 07/01/2011 | 20:40 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 15.00K | 0.00K |
| WEBSTER CITY | HAMILTON CO. | IA | 07/01/2011 | 20:50 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 10.00K | 0.00K |
| MASON CITY | CERRO GORDO CO. | IA | 07/01/2011 | 21:08 | CST-6 | Hail | 1.00 in. | 0 | 0 | 5.00K | 10.00K |
| LATIMER | FRANKLIN CO. | IA | 07/01/2011 | 21:15 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 5.00K | 0.00K |
| HAMPTON | FRANKLIN CO. | IA | 07/01/2011 | 21:20 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 15.00K | 0.00K |
| MONTEITH | GUTHRIE CO. | IA | 07/01/2011 | 21:40 | CST-6 | Hail | 1.00 in. | 0 | 0 | 2.00K | 10.00K |
| JEWELL | HAMILTON CO. | IA | 07/01/2011 | 21:43 | CST-6 | Hail | 1.00 in. | 0 | 0 | 3.00K | 10.00K |
| HERNDON | GUTHRIE CO. | IA | 07/01/2011 | 21:50 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 15.00K | 0.00K |
| PERRY | DALLAS CO. | IA | 07/01/2011 | 22:19 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 10.00K | 0.00K |
| WELLSBURG | GRUNDY CO. | IA | 07/01/2011 | 22:29 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 5.00K | 0.00K |
| Totals: | 0 | 0 | 358.00K | 75.00K |
