The hail was caused by a slow-moving, cold-core low-pressure system that allowed storms to strengthen and pelt the Valley with ice. This fall has been uncharacteristically wet for much of Arizona, ...

It’s hard to get an entirely clear satellite image at this time of year because of lake-effect clouds. The ice amount can be measured with the satellite imagery even if the ice isn’t visible under the ...

Scientists have uncovered a new threat hiding under the floating edges of Antarctica: fast moving, stormlike swirls of water ...