Notes from Dr. Jeff Masters,
Severe Weather Expert

Meteorology of Saturday's Colombian Flood Disaster That Killed 254

At least 254 people were killed in the in the city of Mocoa (population 40,000) in southwest Colombia near the border of Ecuador early Saturday, when torrential rains triggered a debris flow on a nearby mountain that surged into the town as a huge wall of water carrying tons of mud and debris. The disaster is the fourth deadliest weather-related disaster in Colombia’s recorded history.

Updated: 4:07 PM UTC on April 03, 2017