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Storm Events Database
Event Details
| Event | Thunderstorm Wind |
| Magnitude | 52 kts. |
| State | IOWA |
| County/Area | EMMET |
| WFO | DMX |
| Begin Date | 07/16/2007 16:35:00 CST-6 |
| Begin Range | 0 |
| Begin Azimuth | N |
| Begin Location | RINGSTED |
| Begin Lat/Lon | 43.3/-94.52 |
| End Date | 07/16/2007 16:35:00 CST-6 |
| Deaths Direct/Indirect | 0/0 (fatality details below, when available...) |
| Injuries Direct/Indirect | 0/0 |
| Property Damage | 20.00K |
| Crop Damage | 2.00K |
| Episode Narrative | A very unstable airmass, typical of July, was in place over Iowa. Afternoon temperatures warmed into the upper 80s to low 90s, with dew point temperatures in the upper 60s to low 70s. By the mid and late afternoon hours, lifted indices were in the -8 to -10 C. range and CAPE was between 4000 and 5000 J/kg. The airmass was quite warm with freezing levels in the 13,000 to 15,000 foot range. The best shear was over the east third of the state, where values were close to 40 kts of effective shear. The values tapered off to around 25 kts over the west third. There was plenty of CAPE available in the -10 to -30 C. level of the atmosphere with values in the 400 to 500 J/kg range. LCL levels ranged from around 1000 meters over eastern Iowa, to around 1500 meters over the west. A weak surface low pressure was located over central South Dakota during the afternoon. A stationary front extended from the low, east-southeast into the northeast corner of Iowa. Initial development took place over eastern South Dakota, with secondary development over eastern Iowa. The area over South Dakota tracked southeast into northwest and north central Iowa, while the development over eastern Iowa tracked slowly south. Initially, the thunderstorms over the northwest produced winds of 60 to 70 MPH, with one report of 80 MPH winds. In the Armstrong area, 70 to 80 MPH winds rendered roadways impassible and tore gutters off of houses. The area over the east produced mainly hail and heavy rain. Hail up to softball size occurred in the Cedar Falls area, with baseball size hail in Black Hawk County near Waterloo. As the evening progressed, the convection to the northwest became more organized as it reached the convection to the east. A large supercell formed over Grundy County. It has a pronounced anti-cyclonic circulation with it as it tracked southeast into northern Tama County. There were several reports of funnel clouds all the way from Worth County southeast to Tama County. It turned out that many of the reports were of gustnadoes, forming on the east edge of the line along the outflow boundary. They lacked depth and no reports of damage were received. |
| Event Narrative |
All events for this episode:
| Location | County/Zone | St. | Date | Time | T.Z. | Type | Mag | Dth | Inj | PrD | CrD |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Totals: | 0 | 0 | 1.372M | 375.00K | |||||||
| ESTHERVILLE | EMMET CO. | IA | 07/16/2007 | 16:20 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 25.00K | 0.00K |
| ESTHERVILLE | EMMET CO. | IA | 07/16/2007 | 16:20 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 10.00K | 2.00K |
| ESTHERVILLE | EMMET CO. | IA | 07/16/2007 | 16:20 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 25.00K | 0.00K |
| ESTHERVILLE | EMMET CO. | IA | 07/16/2007 | 16:22 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 10.00K | 2.00K |
| ESTHERVILLE ARPT | EMMET CO. | IA | 07/16/2007 | 16:25 | CST-6 | Thunderstorm Wind | 53 kts. MG | 0 | 0 | 3.00K | 0.00K |
| ESTHERVILLE | EMMET CO. | IA | 07/16/2007 | 16:28 | CST-6 | Thunderstorm Wind | 65 kts. EG | 0 | 0 | 50.00K | 5.00K |
| ESTHERVILLE ARPT | EMMET CO. | IA | 07/16/2007 | 16:32 | CST-6 | Thunderstorm Wind | 54 kts. MG | 0 | 0 | 3.00K | 0.00K |
| RINGSTED | EMMET CO. | IA | 07/16/2007 | 16:35 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 20.00K | 2.00K |
| ESTHERVILLE ARPT | EMMET CO. | IA | 07/16/2007 | 16:38 | CST-6 | Thunderstorm Wind | 56 kts. MG | 0 | 0 | 3.00K | 0.00K |
| ARMSTRONG | EMMET CO. | IA | 07/16/2007 | 16:40 | CST-6 | Thunderstorm Wind | 65 kts. EG | 0 | 0 | 75.00K | 20.00K |
| ARMSTRONG | EMMET CO. | IA | 07/16/2007 | 16:45 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 25.00K | 10.00K |
| BANCROFT | KOSSUTH CO. | IA | 07/16/2007 | 16:45 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 15.00K | 100.00K |
| PACKARD | BUTLER CO. | IA | 07/16/2007 | 16:45 | CST-6 | Hail | 1.75 in. | 0 | 0 | 25.00K | 10.00K |
| SWEA CITY | KOSSUTH CO. | IA | 07/16/2007 | 16:50 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 15.00K | 5.00K |
| PACKARD | BUTLER CO. | IA | 07/16/2007 | 16:52 | CST-6 | Hail | 0.75 in. | 0 | 0 | 0.00K | 10.00K |
| SENECA | KOSSUTH CO. | IA | 07/16/2007 | 16:55 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 5.00K | 0.00K |
| SWEA CITY | KOSSUTH CO. | IA | 07/16/2007 | 16:55 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 5.00K | 0.00K |
| SWEA CITY | KOSSUTH CO. | IA | 07/16/2007 | 16:55 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 5.00K | 0.00K |
| SEXTON | KOSSUTH CO. | IA | 07/16/2007 | 17:15 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 10.00K | 25.00K |
| CLARKSVILLE | BUTLER CO. | IA | 07/16/2007 | 17:24 | CST-6 | Hail | 1.00 in. | 0 | 0 | 10.00K | 5.00K |
| CLARKSVILLE | BUTLER CO. | IA | 07/16/2007 | 17:30 | CST-6 | Hail | 1.00 in. | 0 | 0 | 10.00K | 5.00K |
| SHELL ROCK | BUTLER CO. | IA | 07/16/2007 | 17:42 | CST-6 | Hail | 1.75 in. | 0 | 0 | 25.00K | 5.00K |
| GARNER | HANCOCK CO. | IA | 07/16/2007 | 17:45 | CST-6 | Thunderstorm Wind | 57 kts. EG | 0 | 0 | 25.00K | 0.00K |
| GARNER | HANCOCK CO. | IA | 07/16/2007 | 17:47 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 5.00K | 0.00K |
| BRITT | HANCOCK CO. | IA | 07/16/2007 | 17:52 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 5.00K | 0.00K |
| FINCHFORD | BLACK HAWK CO. | IA | 07/16/2007 | 17:54 | CST-6 | Hail | 2.00 in. | 0 | 0 | 35.00K | 10.00K |
| FINCHFORD | BLACK HAWK CO. | IA | 07/16/2007 | 18:00 | CST-6 | Hail | 2.75 in. | 0 | 0 | 50.00K | 20.00K |
| NEW HARTFORD | BUTLER CO. | IA | 07/16/2007 | 18:06 | CST-6 | Hail | 1.75 in. | 0 | 0 | 25.00K | 10.00K |
| CEDAR FALLS | BLACK HAWK CO. | IA | 07/16/2007 | 18:09 | CST-6 | Hail | 1.00 in. | 0 | 0 | 10.00K | 2.00K |
| CEDAR FALLS | BLACK HAWK CO. | IA | 07/16/2007 | 18:10 | CST-6 | Hail | 1.00 in. | 0 | 0 | 10.00K | 2.00K |
| FARMER | BUTLER CO. | IA | 07/16/2007 | 18:10 | CST-6 | Hail | 2.75 in. | 0 | 0 | 35.00K | 10.00K |
| FARMER | BLACK HAWK CO. | IA | 07/16/2007 | 18:11 | CST-6 | Hail | 4.50 in. | 0 | 0 | 75.00K | 10.00K |
| CEDAR FALLS | BLACK HAWK CO. | IA | 07/16/2007 | 18:12 | CST-6 | Hail | 1.00 in. | 0 | 0 | 20.00K | 5.00K |
| CEDAR FALLS | BLACK HAWK CO. | IA | 07/16/2007 | 18:12 | CST-6 | Hail | 1.00 in. | 0 | 0 | 20.00K | 5.00K |
| CEDAR FALLS | BLACK HAWK CO. | IA | 07/16/2007 | 18:13 | CST-6 | Hail | 2.50 in. | 0 | 0 | 35.00K | 20.00K |
| CEDAR FALLS | BLACK HAWK CO. | IA | 07/16/2007 | 18:15 | CST-6 | Hail | 2.75 in. | 0 | 0 | 200.00K | 5.00K |
| CEDAR FALLS | BLACK HAWK CO. | IA | 07/16/2007 | 18:17 | CST-6 | Hail | 4.00 in. | 0 | 0 | 300.00K | 5.00K |
| CEDAR FALLS | BLACK HAWK CO. | IA | 07/16/2007 | 18:17 | CST-6 | Hail | 1.50 in. | 0 | 0 | 25.00K | 5.00K |
| MASON CITY | CERRO GORDO CO. | IA | 07/16/2007 | 18:19 | CST-6 | Thunderstorm Wind | 51 kts. MG | 0 | 0 | 10.00K | 0.00K |
| MASON CITY | CERRO GORDO CO. | IA | 07/16/2007 | 18:20 | CST-6 | Thunderstorm Wind | 50 kts. EG | 0 | 0 | 5.00K | 0.00K |
| CEDAR FALLS | BLACK HAWK CO. | IA | 07/16/2007 | 18:27 | CST-6 | Hail | 1.00 in. | 0 | 0 | 5.00K | 5.00K |
| HUDSON | BLACK HAWK CO. | IA | 07/16/2007 | 18:30 | CST-6 | Hail | 4.25 in. | 0 | 0 | 50.00K | 25.00K |
| CEDAR FALLS | BLACK HAWK CO. | IA | 07/16/2007 | 18:30 | CST-6 | Hail | 1.75 in. | 0 | 0 | 20.00K | 10.00K |
| CEDAR FALLS ARPT | BLACK HAWK CO. | IA | 07/16/2007 | 18:30 | CST-6 | Hail | 1.75 in. | 0 | 0 | 10.00K | 10.00K |
| HAMPTON | FRANKLIN CO. | IA | 07/16/2007 | 18:35 | CST-6 | Thunderstorm Wind | 61 kts. EG | 0 | 0 | 15.00K | 0.00K |
| LA PORTE CITY | BLACK HAWK CO. | IA | 07/16/2007 | 19:20 | CST-6 | Hail | 0.88 in. | 0 | 0 | 3.00K | 10.00K |
| LA PORTE CITY | BLACK HAWK CO. | IA | 07/16/2007 | 19:43 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 5.00K | 0.00K |
| Totals: | 0 | 0 | 1.372M | 375.00K |
