Debris Flow in Elko County, Nevada
Debris Flow August 12, 2022 – August 13, 2022 · Elko County, Nevada
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
On the evening of August 12th, Lamoille Canyon received some brief periods of heavy rainfall. The BURN2 site located at the Thomas Canyon Campground in Lamoille Canyon recorded 0.34 inches that fell over a 15-minute span from 2100 to 2115LT. The area continued to get some more rain and ended up with 0.49 inches in 1 hour from 2100 to 2200 LT. Shortly thereafter a debris flow was reported in the area by a hydrologist from the USGS. Some water, mud, silt, and small rocks washed over the road depositing the silt and mud on the roadway. The hydrologist reiterated that 0.25 inches for 15 minutes or 1 inch/hr seem to be a good threshold for debris flows to occur.
The wider storm
Abundant Thunderstorms with storm motions opposite of cell synoptic flow allowed for slow-moving, training storms. This led to areas of flooding and debris flows.
Began near Lamoille (40.6521, -115.4099).
Source: NOAA Storm Events Database, event 1040044. Narratives are written by the National Weather Service forecast office that issued the report.
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