Photos from central Phoenix showed graupel, also known as "soft hail", lining the streets and blanketing cars.
An ABC15 viewer photo from 7th Street and Maryland showed the graupel falling as thick clouds covered the sky. Another image showed cars in a lot at 16th Street and Northern covered with the rarely-seen "snow".
See the photos in the slideshow above.
The chilly conditions have been helped by a nearly-20-degree drop in temperatures.
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