Ongoing Hail Threat Prompts New Warning

1210pm radarThe National Weather Service in Sioux Falls have issued a new Severe Thunderstorm Warning for Plymouth and Sioux Counties in northwest Iowa.  This new warning will remain in effect until 12:45pm.  A severe thunderstorm moving into Iowa has a long history of producing extremely large hail up to 3.00” in diameter.  That’s bigger than tennis balls. The storm is accelerating a bit, moving to the northeast at 40mph.

One other thing to watch our for with this storm.  Trained spotters in South Dakota spotted a wall cloud within this storm a short while ago, prompting a tornado warning.  We’ll monitor that threat, but for now the primary threat is dangerously large hail and some strong wind gusts.

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