Watch, Warning, and Advisory Definitions
Fire Weather Definitions
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Fire Weather Watch
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Fire Weather Watches are issued anytime the area has been dry for a week or two
(or for a shorter period during spring green-up or after fall color), the
National
Fire Danger Rating System (NFDRS) is high to extreme, and critical
weather conditions are expected within the next 48 hours. These critical
elements are:
- sustained winds averaging 15 mph or greater
- relative humidity 25 percent or less
- temperature 75°F or greater
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Red Flag Warning
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Red Flag Warnings are issued anytime there is an ongoing wildfire, or critical
weather conditions will occur within the next 24 hours. These conditions are:
- sustained winds averaging 15 mph or greater
- relative humidity 25 percent or less
- temperature 75°F or greater
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