Storm Events Database
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Storm Events Database
Event Details:
| Event | Tornado |
| -- Scale | EF1 |
| -- Length | 7.44 Miles |
| -- Width | 50 Yards |
| State | ILLINOIS |
| County/Area | LEE |
| WFO | LOT |
| Report Source | NWS Storm Survey |
| NCEI Data Source | CSV |
| Begin Date | 2015-06-22 18:28 CST-6 |
| Begin Location | 3NW HARMON |
| Begin Lat/Lon | 41.7436/-89.5917 |
| End Date | 2015-06-22 18:40 CST-6 |
| End Location | 2SW WALTON |
| End Lat/Lon | 41.6971/-89.4615 |
| Deaths Direct/Indirect | 0/0 (fatality details below, when available...) |
| Injuries Direct/Indirect | 0/0 |
| Property Damage | 0.00K |
| Crop Damage | 0.00K |
| Episode Narrative | During the evening of June 22, twelve tornadoes occurred across northern Illinois, including ten in the WFO Chicago forecast area. Ten of the twelve were spawned from a single long-lived cyclic supercell, which tracked across Whiteside, Lee, LaSalle, Grundy, Will, and Kankakee Counties. The heaviest damage was in Coal City (Grundy County) and Braidwood (Will County) which was caused by an EF-3 tornado with maximum winds of 160 mph, and the Woodhaven Campground in Sublette (Lee County) caused by an EF-2 tornado with maximum winds of 130 mph. There were 14 injuries reported. There were no fatalities. The EF-3 Coal City to Braidwood tornado was the strongest tornado in Grundy County since an F3 tornado struck on July 17, 1972. The atmosphere was primed for severe weather, with very warm, humid conditions, low pressure moving north of the region, and a strong jet stream aloft. An outflow boundary from earlier storms during the late morning and early afternoon may have been key to where the long-lived tornado-producing storm tracked. In addition to tornado and wind damage, slow moving storms brought torrential rainfall of locally up to 3 to 5 inches to portions of Lee, Grundy, Will, and Kankakee counties, resulting in widespread flash flooding. This rain fell on top of soil already saturated from repeated heavy rains over the past few weeks. |
| Event Narrative | The tornado touched down near Howland Road where hardwood trees were snapped. The tornado moved southeast just north of Harmon where additional trees were snapped. The tornado snapped trees as it cross Hoyle Road. The tornado lifted before reaching IL-26. Peak winds were estimated to be 105 mph. (Tornado 2 of 10). |
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 | 14 | 26.567M | 0.00K | |||||||
| SUBLETTE | LEE CO. | IL | 06/22/2015 | 10:30 | CST-6 | Hail | 1.00 in. | 0 | 0 | 0.00K | 0.00K |
| MENDOTA | LA SALLE CO. | IL | 06/22/2015 | 10:54 | CST-6 | Hail | 0.75 in. | 0 | 0 | 0.00K | 0.00K |
| WILL (ZONE) | WILL (ZONE) | IL | 06/22/2015 | 15:05 | CST-6 | Strong Wind | 43 kts. MG | 0 | 0 | 0.50K | 0.00K |
| VAN PETTEN | LEE CO. | IL | 06/22/2015 | 18:20 | CST-6 | Tornado | EF0 | 0 | 0 | 0.00K | 0.00K |
| HARMON | LEE CO. | IL | 06/22/2015 | 18:28 | CST-6 | Tornado | EF1 | 0 | 0 | 0.00K | 0.00K |
| MAYTOWN | LEE CO. | IL | 06/22/2015 | 18:53 | CST-6 | Tornado | EF2 | 0 | 7 | 1.000M | 0.00K |
| MENDOTA | LA SALLE CO. | IL | 06/22/2015 | 19:19 | CST-6 | Tornado | EF1 | 0 | 0 | 100.00K | 0.00K |
| SUBLETTE ARPT | LEE CO. | IL | 06/22/2015 | 19:19 | CST-6 | Thunderstorm Wind | 52 kts. EG | 0 | 0 | 0.00K | 0.00K |
| MENDOTA | LA SALLE CO. | IL | 06/22/2015 | 19:23 | CST-6 | Thunderstorm Wind | 70 kts. EG | 0 | 0 | 10.00K | 0.00K |
| LEE CENTER | LEE CO. | IL | 06/22/2015 | 19:30 | CST-6 | Flash Flood | 0 | 0 | 0.00K | 0.00K | |
| PRAIRIE CENTER | LA SALLE CO. | IL | 06/22/2015 | 19:50 | CST-6 | Tornado | EF1 | 0 | 0 | 100.00K | 0.00K |
| STAVANGER | LA SALLE CO. | IL | 06/22/2015 | 20:17 | CST-6 | Tornado | EF1 | 0 | 0 | 0.00K | 0.00K |
| NETTLECREEK | GRUNDY CO. | IL | 06/22/2015 | 20:19 | CST-6 | Tornado | EF1 | 0 | 0 | 50.00K | 0.00K |
| LANGHAM | GRUNDY CO. | IL | 06/22/2015 | 20:30 | CST-6 | Thunderstorm Wind | 50 kts. EG | 0 | 0 | 5.00K | 0.00K |
| GORMAN | GRUNDY CO. | IL | 06/22/2015 | 20:43 | CST-6 | Tornado | EF0 | 0 | 0 | 50.00K | 0.00K |
| PAYTONVILLE | GRUNDY CO. | IL | 06/22/2015 | 20:45 | CST-6 | Tornado | EF3 | 0 | 7 | 25.000M | 0.00K |
| BRAIDWOOD | WILL CO. | IL | 06/22/2015 | 20:58 | CST-6 | Tornado | EF2 | 0 | 0 | 250.00K | 0.00K |
| ALTORF | KANKAKEE CO. | IL | 06/22/2015 | 21:08 | CST-6 | Tornado | EF1 | 0 | 0 | 0.00K | 0.00K |
| BOURBONNAIS | KANKAKEE CO. | IL | 06/22/2015 | 21:13 | CST-6 | Thunderstorm Wind | 70 kts. EG | 0 | 0 | 0.00K | 0.00K |
| UNION HILL | KANKAKEE CO. | IL | 06/22/2015 | 21:20 | CST-6 | Thunderstorm Wind | 50 kts. EG | 0 | 0 | 1.00K | 0.00K |
| KANKAKEE | KANKAKEE CO. | IL | 06/22/2015 | 21:36 | CST-6 | Thunderstorm Wind | 50 kts. EG | 0 | 0 | 1.00K | 0.00K |
| RITCHIE | WILL CO. | IL | 06/22/2015 | 21:50 | CST-6 | Flash Flood | 0 | 0 | 0.00K | 0.00K | |
| DICKEYS | KANKAKEE CO. | IL | 06/22/2015 | 22:46 | CST-6 | Tornado | EF0 | 0 | 0 | 0.00K | 0.00K |
| Totals: | 0 | 14 | 26.567M | 0.00K |
