Blue Cloud on radar baffles weather service…

http://www.washingtonpost.com/blogs/capital-weather-gang/wp/2014/09/24/mystery-solved-suspicious-radar-echoes-were-probably-migrating-monarch-butterflies/

• ← Khan Academy is a great resource! Clink on the link to view the flyer
• The Lake Taal Volcano in the Philipines →