<p>Storm chasers photograph a spring supercell thunderstorm near Texline, Texas. Supercells are severe, potentially dangerous storms that have a vortex of rotating air known as a mesocyclone. They produce hail, strong rain, and occasionally tornadoes.</p>

Texas Supercell

Storm chasers photograph a spring supercell thunderstorm near Texline, Texas. Supercells are severe, potentially dangerous storms that have a vortex of rotating air known as a mesocyclone. They produce hail, strong rain, and occasionally tornadoes.

Photograph by Christopher Evans

Travel 365: Best of July 2015

See the ten most popular Travel 365 pictures from July 2015 National Geographic Travel.

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