Squall lines rank among the most common and destructive forms of organized severe weather in the United States, yet they remain poorly understood by the general public compared to tornadoes or ...

Some squall lines can produce tornadoes, too. They’re often wrapped in rain and move erratically.

Severe storms — thunderstorms that produce tornadoes, hail at least one inch in diameter, or damaging winds (58 mph or higher) — are destructive and deadly. They cause an average of 200 deaths ...