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A Cloud of…Butterflies? It Happened in St. Louis

24 Sep 2014, 10:29 am

Butterfly 2 (1)

St. Louis can get some weird weather – tornadoes, heat waves, blizzards and everything in between. But what the city saw last week was truly bizarre.

Meteorologists at the National Weather Service in St. Louis picked up a big green target on its radar (see pictures). The radar returns, however, weren’t rain, snow or anything in between – they turned out to be of all things…a group of monarch butterflies swooping through the region, migrating south.

The weather service explains that they believe the radar is picking up butterflies simply because – in more layman’s terms – the radar picked up moving, symmetrical rotation on the radar, indicative of a ‘biological’ target, and coupled with the sighting of butterflies in the area, the Weather Service believes it was a group of monarch butterflies.

This is the time of season when monarchs usually head south for the warmth of Mexico and Central America. Pretty cool, if you ask me!

Meteorologist Chris Bianchi

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