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Storm Events Database
Event Details
| Event | Flash Flood |
| -- Flood Cause | Heavy Rain |
| State | WISCONSIN |
| County/Area | COLUMBIA |
| WFO | MKX |
| Begin Date | 07/22/2010 16:00:00 CST-6 |
| Begin Range | 4 |
| Begin Azimuth | WSW |
| Begin Location | PORTAGE ARPT |
| Begin Lat/Lon | 43.55/-89.54 |
| End Date | 07/22/2010 19:00:00 CST-6 |
| End Range | 3 |
| End Azimuth | ESE |
| End Location | FRIESLAND |
| End Lat/Lon | 43.56/-89.01 |
| Deaths Direct/Indirect | 0/0 (fatality details below, when available...) |
| Injuries Direct/Indirect | 0/0 |
| Property Damage | 100.00K |
| Crop Damage | 10.00K |
| Episode Narrative | Parts of south-central and southeast Wisconsin experienced several rounds of record-setting torrential heavy rains during the afternoon and evening hours of July 22, 2010 that led to flash flooding and damage. During the afternoon, a persistent band of strong to severe thunderstorms developed and moved very slowly over south central and southeast Wisconsin through the evening hours. The individual storms were moving quite fast, about 40 to 50 mph, but the slow southward movement of the boundary these storms were developing along, resulted in storms repeatedly training, or moving, over the same area. Widespread 3 to 4 inch amounts were reported along and either side of the I-94 corridor, with locally higher amounts of 5 to 8 inches. The greatest rain amounts fell in Milwaukee County. Mitchell Field recorded 5.61 inches for the day, breaking a record for the date. The previous record was 1.26 set in 1948. This also is the second highest daily rainfall total on record for Milwaukee. The greatest one-day precipitation record was the 6.81 inches which fell on August 6, 1986. Madison also set a record for precipitation for the date at 3.62 inches. This beat the previous mark of 2.21 inches set in 1885. The 3.62 inches of rainfall ranks 13th for the most precipitation received in one day. The record is the 4.96 inches which fell on August 8, 1906. About 32,000 We Energy utility customers lost electrical power throughout southeast Wisconsin due to the flooding and lightning. |
| Event Narrative | Law enforcement officials reported numerous road closures and culverts damaged due to deep and rushing water over roads from near Portage to Randolph, and south to the Dane County border. Included in these reports was damage to culvert supports in the Harmony Grove subdivision and damage to roads shoulders and driveways along Cactus Acres Road in Lodi; knee-high water covering Henry Drive in Portage. Storm total rainfall reports include 3.68 inches in Lodi; 3.58 inches in Arlington; and 2.58 inches near the Wisconsin Dells, with much of the rain falling within one to two hours of time. |
All events for this episode:
| Location | County/Zone | St. | Date | Time | T.Z. | Type | Mag | Dth | Inj | PrD | CrD |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Totals: | 1 | 0 | 27.600M | 111.00K | |||||||
| PORTAGE ARPT | COLUMBIA CO. | WI | 07/22/2010 | 16:00 | CST-6 | Flash Flood | 0 | 0 | 100.00K | 10.00K | |
| STONE | DANE CO. | WI | 07/22/2010 | 16:00 | CST-6 | Flash Flood | 0 | 0 | 100.00K | 10.00K | |
| RANDOLPH | DODGE CO. | WI | 07/22/2010 | 16:00 | CST-6 | Flash Flood | 0 | 0 | 20.00K | 5.00K | |
| ST KILIAN | WASHINGTON CO. | WI | 07/22/2010 | 16:30 | CST-6 | Flash Flood | 0 | 0 | 20.00K | 2.00K | |
| SHEBOYGAN | SHEBOYGAN CO. | WI | 07/22/2010 | 16:30 | CST-6 | Flash Flood | 0 | 0 | 20.00K | 2.00K | |
| DANE | DANE CO. | WI | 07/22/2010 | 17:00 | CST-6 | Flash Flood | 0 | 0 | 150.00K | 10.00K | |
| FIVE CORNERS | OZAUKEE CO. | WI | 07/22/2010 | 17:00 | CST-6 | Flash Flood | 0 | 0 | 20.00K | 1.00K | |
| GRANVILLE | MILWAUKEE CO. | WI | 07/22/2010 | 17:00 | CST-6 | Flash Flood | 1 | 0 | 24.100M | 10.00K | |
| WATERTOWN | JEFFERSON CO. | WI | 07/22/2010 | 18:00 | CST-6 | Flash Flood | 0 | 0 | 150.00K | 10.00K | |
| HONEY LAKE | RACINE CO. | WI | 07/22/2010 | 18:00 | CST-6 | Flash Flood | 0 | 0 | 20.00K | 1.00K | |
| MENOMONEE FALLS | WAUKESHA CO. | WI | 07/22/2010 | 18:00 | CST-6 | Flash Flood | 0 | 0 | 2.900M | 50.00K | |
| Totals: | 1 | 0 | 27.600M | 111.00K |
