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Severe Thunderstorm Warning for Black Hawk, IA; Bremer, IA; Butler, IA +1 more

This alert has ended.Kept for recent context. Do not use it as a current warning.

Official alert fields

What you need to know

Effective
Ended
Official severity
Severe
Official urgency
Immediate
Official certainty
Observed

What is happening

At 407 PM CDT, a severe thunderstorm was located near New Hartford, or 6 miles northwest of Cedar Falls, moving southeast at 40 mph. HAZARD...70 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect considerable tree damage. Wind damage is also likely...

What the bulletin says to do

A Tornado Watch remains in effect until 1000 PM CDT for central, north central and northeastern Iowa. For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning.

Read official NWS bulletin

Full official description

Bulletin details

At 407 PM CDT, a severe thunderstorm was located near New Hartford, or 6 miles northwest of Cedar Falls, moving southeast at 40 mph. HAZARD...70 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. Locations impacted include... Waterloo, Cedar Falls, Waverly, Allison, Parkersburg, Denver, Clarksville, Tripoli, Shell Rock, Dike, Waterloo Municipal Airport, Uni-Dome And McLeod Center, Janesville, Readlyn, New Hartford, Plainfield, Stout, George Wyth State Park, Allison Municipal Airport, and Waverly Municipal Airport.

Lifecycle record

Official revisions

2 captured
  1. Update

    Severe Thunderstorm Warning issued July 20 at 4:08PM CDT until July 20 at 4:30PM CDT by NWS Des Moines IA

    Official revision
  2. Alert

    Severe Thunderstorm Warning issued July 20 at 3:24PM CDT until July 20 at 4:30PM CDT by NWS Des Moines IA

    Official revision

Source and limitations

Publisher: Weather Alert Watch. Primary source: NWS Des Moines IA. This page reorganizes official fields and does not add a forecast or expand the affected area.

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Actual
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