Canyon Closure

The good news is that the triple digit streak ended yesterday.  The bad news is that Little Cottonwood Canyon is closed this morning.  Yup, no first tracks today.

Wait a minute.  It's July!  In this instance, the culprits for the canyon closure are rockslides produced by extremely heavy precipitation overnight.  Apparently Mother Nature wanted to put on her own fireworks show.  KSL reports that snowplows are out removing the debris.

Source: ksl.com

Observations from the Alta-Base observing site suggest an accumulation of 1.15 inches in the one-hour period ending at 0900 UTC (0300 MDT).  Rocks were reported on the road at about 0230 MDT.

Hydrographs along Little Cottonwood Creek show a dramatic spike in streamflow during this period, with a volume exceeding that during the spring runoff.

Source: NWS

Impressive stuff.

Thanks to Trevor Alcott for his input on this post.