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Iowa storm reports for August 21, 2017

NOAA recorded 2 hail reports, 2 wind reports and 2 tornado reports in Iowa on August 21, 2017.

in Iowa
6
Storm reports
About 29 miles from Sioux Falls, SD
1.0 in
Largest hail
About 59 miles from Sioux Falls, SD
64 mph
Highest gust
Highest rating EF0, about 27 miles from Des Moines, IA
2
Tornado reports
Sources: NOAA/NWS Storm Prediction Center reports; damage surveys from the NWS Damage Assessment Toolkit

Hail, inches

  • 0.75
  • 1
  • 1.5
  • 2
  • 2.5
  • 3+

Dots: reports.

  • Wind report
  • Tornado and its path
  • Surveyed tornado path

Source: NOAA/NWS Storm Prediction Center, final severe weather database (from NOAA's Storm Data). Report day: 12:00 UTC on August 21, 2017 to 12:00 UTC the next day. Times are Central.

Select a dot or a path for the report. NWS survey teams walked the shaded paths after the storm; each is drawn at the widest width they found, so it can look wider than the damage at any one spot.

Reports by hour

Hail2, most at 11 AM

Wind2, most at 2 PM

Tornado2, most at 5 PM

Reports per hour, Central time. Each row has its own scale.

Every report

Source: NOAA/NWS Storm Prediction Center.

TimeRatingWherePath
5:52 PMEF0About 27 miles from Des Moines, IA3.28 mi long, 80 yd wide
5:58 PMEF0About 26 miles from Des Moines, IA1.08 mi long, 10 yd wide

Reports are what observers recorded near a location, not a complete record of every storm. They don’t describe conditions at any building.