CONSIDER TAIL WIND COMPONENTS
When authorizing use of a runway and a tail wind component exists, always state wind direction
and velocity. (The wind may be described as calm when appropriate.)
Ask for PIREPs anytime they are requested. In addition, ask for PIREPs when forecast for your
area or when any of the following exists:
a. Wind shear.
b. Icing of light degree or greater.
c. Braking action advisories in effect.
d. Thunderstorms and related phenomena.
e. Turbulence of moderate degree or greater.
f. Visibility (surface or aloft) at or less than 5 miles.
g. Ceilings at or below 5,000 feet. These reports shall include cloud bases and tops when
possible. Ensure that at least one descent or climb-out PIREP including cloud bases and tops and other
related phenomena is obtained each hour when there is a ceiling at or below 5,000 feet.
Record, with the PIREP, the time of the report, type of aircraft, position of the aircraft, and
altitude of the aircraft. The PIREP should be gotten directly from the pilot. If it was requested by
another facility, however, you may instruct the pilot to deliver it directly to that facility.
Relay pertinent PIREPs to concerned aircraft in a timely manner. Relay also all operationally
significant PIREPs to proper intrafacility positions and the flight service station serving the area in
which the report was obtained. Other concerned terminal or en route ATC facilities including non-FAA
facilities also should receive operationally significant PIREPs. Use the words "gain" and "loss" when
describing to pilots the effects of windshear or airspeed.