Severe Weather Guidelines

"Severe Weather Criteria"

Severe Weather Criteria as defined by the NWS

HAIL 0.75 inches or larger
TORNADO any size, any strength
WIND gusts greater than 58mph (50kts)
FLASH FLOODING a rapid rise of any river, creek, etc.

In addition to any of the above official severe weather
criteria, the NWS in Denver would appreciate reports
on any of the following weather events.

Hail stones 0.5 inches or larger.
Wind gusts greater than 50 miles per hour.
Any damage caused by wind, tornadoes, hail, or flooding.
Excessive rainfall that may lead to flooding or flash flooding.
(1" an hour for urban areas or 1.5" an hour for rural areas)

Back to All-Season Spotter Page

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