Las Vegas Sets Humidity Record - It's A Dry Heat

The National Weather Service in Las Vegas, Nevada issued a statement yesterday saying they had reached a record "dew point depression" of 129 degrees (or: low humidity of 1%) when their temperature was 107 with a dew point of -22 F.

They explain on their Facebook Page:

You can't see the maximum depression on the official data graph above, where data only updates once an hour, but they posted a picture of the 1-minute data on their Facebook Page:

Relative humidity readings below 10% were widespread over the Southwest yesterday, though the KLAS airport was the driest I could find on the Mesonet map.