A downpour usually starts unexpectedly and quickly, leaving little time to seek shelter. The forecast didn't mention a downpour, but we were drenched in seconds.
Pro Tip 2/3
Intensity
The term implies more than just rain—it's a large amount of water pouring down rapidly. The downpour was so intense that the streets quickly flooded.
Pro Tip 3/3
Brief Duration
Downpours are often short-lived, though they're very heavy. They may not last more than a few minutes. After a ten-minute downpour, the sun was shining again.