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Rocky Mountain Red Flag Criteria
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Rocky Mountain Red Flag Criteria
One or more of the following conditions, in conjunction with fuel characteristics
(as determined by fire management) for any 3 hours or more in a 12 hour period.
- Frequent wind gusts of 25 mph or greater - AND - relative humidity of 15% or lower.
- Dry Thunderstorms - 15% coverage or more, constituting a Lightning Activity Level of 6.
In addition to the basic criteria
above, a combination of other elements may result in Red Flag Conditions. These elements include
- a Haines Index of 5 or 6, wind shifts associated with cold frontal passages or other significant
wind shifts, microburst winds, the first significant lightning event (wet or dry, with 15% thunderstorm
coverage or greater) after an extended hot and dry period, and poor RH recovery.
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