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This Date in Weather History

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EPISODE
1990: The Plainfield Tornado
August 28, 2021
•
4 min
Ashburn
Virginia
The 1990 Plainfield tornado was a devastating tornado that occurred on the afternoon of Tuesday, August 28, 1990. The violent tornado killed 29 people and injured 353. It is the only F5 tornado ever recorded in August and the only F5 tornado to strike the Chicago area. Between 3:15 p.m. and 3:45 p.m. CDT on August 28th, 1990, a violent F5 tornado ripped through Kendall and Will counties. The tornado left a 16.4 miles-long damage which ranged from 600 yards to a half a mile in width. An estimated total of $160 million dollars in damages was added up with a total of 470 homes destroyed and 1000 damaged. Before the Enhanced Fujita Scale was put in use in 2007, the tornado damage was assessed by using the Fujita Scale. On the Fujita Scale, an F5 tornado has estimated wind speeds of 261-318 mph and is defined as having incredible damage in which strong frame houses can be leveled and swept off of foundations, automobile-sized objects can be lifted up into the air, and trees are usually debarked. The Plainfield tornado was the first ever tornado greater than an F3 rating, since records began in 1950, to occur during the month of August in the state of Illinois. It was the second killer tornado since 1950 to occur during the month of August in Illinois. 31 years later this tornado remains the only F5/EF5 rated tornado documented in the United States during the month of August. The tornado had low clouds and rain surrounding it, making it difficult to see. Because of this, no known photographs or videos of this tornado exist. The tornado approached from the northwest; most tornadoes approach from the southwest. Because of these factors and others there was little or no warning. Wikipedia reports that: “In the months following the tornado, the National Weather Service was heavily criticized for providing no warning of the approaching tornado. The NOAA Disaster Survey Report was highly critical of the forecast process within the Chicago office as well as coordination with local spotter networks and the preparedness of these groups. Prior to 1990, the National Weather Service in Chicago was responsible for providing forecasts for the entire state of Illinois. As the Chicago office was overwhelmed with its workload, no warnings were issued by the office until 2:32 p.m. – nearly an hour after the first tornado was sighted southeast of Rockford. A second severe thunderstorm warning was issued almost an hour later at 3:23 p.m., but this provided no indication that a tornado was on the ground and did not mention the area where the tornado had tracked. No tornado warning was issued until after the tornado lifted.”
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