On January 7, 2008 in southwestern New Mexico, the rainstorm was weirdly white.

“I don’t know what it was, but it left a milky, white residue on all the vehicles in town,” said Lt. Eddie Ortiz, 48, of the Grant County Sheriff’s Department, talking about the unusual Jan. 7 rainstorm.

“It was like someone spilled milk on your windshield and it dried up,” Ortiz said. [link]

The State of New Mexico Environment Department later found no health threat, and theorized that strong winds may have suspended sediment from upwind playa basins and mixed it with the precipitation.