Watch, Warning, and Advisory Definitions
Fire Weather Definitions
- Fire Weather Watch
- 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
- Red Flag Warning
- 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
