Heavy Rain in Douglas County, Nevada
Heavy Rain August 4, 2022 · Douglas County, Nevada
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Trained weather spotter located 1.0 miles W of Johnson Lane reported a total rainfall amount of 2.5 inches that fell during the period from 12:00 PM to 18:33 PM.
The wider storm
A deep layer of monsoonal moisture pushed northwest and north into California, Sierra, and western Nevada in a southerly upper flow that marked the western margins of an area of strong high-pressure ridging into the Great Basin region. Thickening mid-level moisture coupled with steep afternoon lapse rates and warmer surface heating initiated deep columns of slow-moving moisture-laden showers and thunderstorms with torrential rains over the 2021 Tamarack burn scar. This resulted in widespread flash flooding and debris flows in Alpine County CA that created a number of impacts. Rainfall rates of 2.22 inches per hour were observed during the peak of the storm in Markleeville, CA which corresponds to at least a 500 year recurrence interval and possibly 1000 year, per NOAA 14 atlas.
Began near Douglas Co Arpt (39.0500, -119.7300).
Source: NOAA Storm Events Database, event 1051023. Narratives are written by the National Weather Service forecast office that issued the report.
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