These forecasts are continually updated and refined 24 hours a day, seven days a week as new information is received by our highly trained staff of Meteorologists and Hydro-Meteorological Technicians. Public Zone Forecasts are generated and issued at least twice a day with updates as needed. The Flagstaff office provides specific forecasts for 19 zones in Northern Arizona. Zone Forecasts include detailed weather information for the first 48 hours and an extended period for 3 to 7 days. For a map of Arizona zones click here .
Weather can change rapidly at times, especially during the summer monsoon season.
During rapidly changing weather events, we issue Short Term Forecasts which serve to keep you informed of detailed weather conditions in your area within the next 1 to 3 hours. Short Term Forecasts are issued to provide additional details such as timing and location of weather phenomena, and to complement the Public Zone Forecast. Pilots can use radio signals to obtain data directly from the observing system at the end of the runway. Sky cloud cover Observation remarks For a map of ASOS locations click here . For additional information on the Aviation Program, please link to our Aviation Web page as well as our TAF Decoder Page .