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ADDS - G-AIRMETs Help Page (2 of 5) Back to AIRMETs Page or AIRMETs help page 3 |
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An AIRMET (AIRman's METeorological Information) advises of weather
that may be hazardous (other than convective activity) to aircraft, but are less severe than SIGMETs.
This information is used by end-users that are directly related to aviation flight planning and safety of
flight, including pilots and personnel who provide weather information to pilots. AIRMETs are regularly scheduled text messages containing a 6 hour forecast with a 6 to 12 hour outlook period. This results in a "time-smear" over which the condition(s) may exist. |
AIRMETs are issued by the National Weather Service's Aviation Weather Center (for the lower 48 states and adjacent
coastal waters) for the following weather-impacted reasons:
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These AIRMET items are considered to be widespread because they must be affecting or be forecast
to affect an area of at least 3000 square miles at any one time. However, if the total area to be
affected during the forecast period is very large, it could be that only a small portion of this
total area would be affected at any one time. AIRMETs are routinely issued for 6 hour periods beginning at 0245 UTC. AIRMETS are also amended as necessary due to changing weather conditions or issuance/cancellation of a SIGMET. |
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METARs TAFs PIREPs AIR/SIGMETs Satellite Radar
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