What's the difference between a shelf cloud and a roll cloud?

A shelf cloud stays attached to the base of the storm cloud along its entire length, while a roll cloud is completely detached and appears as a separate horizontal tube. Both look similar, but the attachment to the storm base is the key distinguishing feature.

How much warning time do you get when you see a shelf cloud approaching?

It depends on how fast the storm is moving and your distance from it, but shelf clouds give you visible advance notice—potentially enough time to get your waterproofs on, secure loose items, and start heading toward proper shelter before conditions deteriorate.

Where should I shelter if a shelf cloud approaches and I hear thunder?

Get to a substantial enclosed building or a fully enclosed hard-topped vehicle immediately. Not a picnic shelter, not a stone bothy, and absolutely not under a tree—these don't provide adequate protection from lightning.

Weather The Elements

Shelf Clouds: Reading the Sky Before a Storm Hits

Learn to spot the horizontal cloud that marks a gust front—your visual cue that cooler air, wind shifts, and rain are heading your way.

6 October 20269 min read