UPDATE: the National Weather Service in La Crosse says another tornado has been documented from the storms on Thursday, September 12th. This tornado took place in rural Clayton County, 2 miles southwest of Monona. It was an EF-0 with estimated winds of 85 mph. The tornado was on the ground for about 4.3 miles and caused damaged mainly to crops and trees. Some outbuilding were damaged and a house had branches impaled through the side. No injuries were reported
...NWS DAMAGE SURVEY FOR 9/12/19 TORNADO EVENT - UPDATE 2... ...RURAL CLAYTON COUNTY IOWA TORNADO... .OVERVIEW...ADDITIONAL DAMAGE SURVEY CONDUCTED IN RURAL CLAYTON COUNTY IOWA TODAY FROM THURSDAY STORMS. .GUNDER/MONONA TORNADO... RATING: EF-0 ESTIMATED PEAK WIND: 85 MPH PATH LENGTH /STATUTE/: 4.3 MILES PATH WIDTH /MAXIMUM/: 40 YARDS FATALITIES: 0 INJURIES: 0 START DATE: SEP 12 2019 START TIME: 534 PM CDT START LOCATION: 5 W FARMERSBURG START LAT/LON: 42.9688 / -91.4648 END DATE: SEP 12 2019 END TIME: 541 PM CDT END LOCATION: 2 SW MONONA END_LAT/LON: 43.0183 / -91.4159 SURVEY SUMMARY: DAMAGE MAINLY TO CROPS AND TREES. NARROW PATH TRACKED THROUGH CORN FIELDS. SOME OUTBUILDINGS DAMAGED AND ONE HOUSE HAD BRANCHES IMPALED THROUGH SIDE WALLS. METAL FENCING POSTS BENT JUST BEFORE TORNADO DISSIPATED. EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO THE FOLLOWING CATEGORIES. EF0...WEAK......65 TO 85 MPH EF1...WEAK......86 TO 110 MPH EF2...STRONG....111 TO 135 MPH EF3...STRONG....136 TO 165 MPH EF4...VIOLENT...166 TO 200 MPH EF5...VIOLENT...>200 MPH
National Weather Service in La Crosse, Wisconsin has released a preliminary report on the Ossian tornado Thursday evening. Click here for more pictures and videos sent in by KWWL viewers.
The tornado was an EF-0 with winds of at least 65 mph and was on the ground for 1 mile. There was mainly tree damage, although a few buildings were damaged.
The image below was what we were showing on TV during our tornado coverage. The circled area on the radar is where we were showing the tornado. It matches up very well with the image above showing where the tornado started.
BRIEF TORNADO TOUCHED DOWN IN RURAL PARTS OF SOUTHERN WINNESHIEK COUNTY IOWA THURSDAY AFTERNOON. .RURAL OSSIAN TORNADO... RATING: EF-0 ESTIMATED PEAK WIND: 80 MPH PATH LENGTH /STATUTE/: 2.83 MILES PATH WIDTH /MAXIMUM/: 150 YARDS FATALITIES: 0 INJURIES: 0 START DATE: SEP 12 2019 START TIME: 4:49 PM CDT START LOCATION: 4 SSW OSSIAN IA START LAT/LON: 43.0915 / -91.7879 END DATE: SEP 12 2019 END TIME: 4:56 PM CDT END LOCATION: 3 SE OSSIAN IA END_LAT/LON: 43.1059 / -91.7357 SURVEY SUMMARY: NUMEROUS TREES AND FARM BUILDINGS DAMAGED. INTERMITTENT DAMAGE PATH WITH SOME TRACKS IN NEARBY CORN FIELDS. WITNESSES SAID THEY OBSERVED SEVERAL FUNNEL CLOUDS AND OCCASIONAL TOUCHDOWNS. EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO THE FOLLOWING CATEGORIES. EF0...WEAK......65 TO 85 MPH EF1...WEAK......86 TO 110 MPH EF2...STRONG....111 TO 135 MPH EF3...STRONG....136 TO 165 MPH EF4...VIOLENT...166 TO 200 MPH EF5...VIOLENT...>200 MPH