Possible Landspouts Sunday Afternoon?

Due to cloud cover and showers across western Iowa Sunday morning, the severe weather potential has almost been removed from Iowa. A marginal risk of severe weather still exists across a portion of the state, but this threat appears to be very low. However, what we will be keeping an eye on will be the the potential for redevelopment across northern Iowa by 3pm Sunday.

As of noon Sunday, there was a front stalled out across northern Iowa. This will be the focal point for redevelopment, as decent amount of CAPE (Convective Available Potential Energy) build into the area. The CAPE will be sufficient for rapid development of strong updrafts capable of producing large hail early in the life of the storm. What will also need to be monitored, is the landspout potential.

Landspouts form during the growth stage of thunderstorms by stretching boundary layer vorticity upward and into the thunderstorm tower’s updraft. Due to the good amount of surface vorticity near the boundary, this could be a possibility.  Landspouts are considered tornadoes since a rotating column of air is in contact with both the surface and the base of the cloud. Not all landspouts are visible, and many are first sighted as debris swirling at the surface before eventually filling in with condensation and dust.

Make sure to download our new Storm Hunter WX app so you can track any storms that do redevelop later this afternoon.

Zach Sharpe

My name is Zach Sharpe. I am the president and forecaster for the Iowa Storm Chasing Network. You can find me on Twitter @Stormchaserzach and on Facebook at: https://www.facebook.com/stormchaserzach/

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