Code
Meaning
PSR10
Packed snow on runway, decelerometer reading 10
IR//
Ice on runway, no decelerometer reading available
LSR05P DRY Loose snow on runway, decelerometer reading 05, patchy, and rest of runway
dry
PSR10 HFS
Packed snow on runway, decelerometer reading 10 on touchdown portion. The
IR06
rollout portion is a high friction surface (HFS) with ice on the runway,
decelerometer reading 06.
Table 1-21 -- Example RCR coding
As you can see, aviation routine weather report coding is complex, and there are
elements that have not been covered in this section. The Surface METAR Observations
User's Manual, COMOCNOPSINST 3141.2, and Surface Weather Observing, FAA
Order 7900.5B, should be consulted if you have any questions on entries or codes.
Phraseology
You must transmit weather information to pilots via radio. Table 1-22 lists examples of
weather report coding and the phraseology that you use when you broadcast weather
reports using standard FAA voice procedures. For a more extensive listing, refer to
Flight Services, FAA Order 7110.10.
Example
Phraseology
07020G35KT
Wind zero seven zero at two zero gusts three five
00000KT
Wind calm
31008KT
Wind three one zero at eight
27011G20KT
Wind two seven zero at one one gusts two zero; wind variable
280V350
between two eight zero and three five zero
VRB04KT
Wind variable at four
1 1/2SM
Visibility one and one-half
1-41
