Check Density Altitude

[RynoB]

I was in Jackson Hole (JAC) over the weekend--About 6500' elevation. The controller stated the temp (18 C) on ATIS followed by "check density altitude." I know why controllers say it, but when is it required to be stated?

[MikeD]

Originally Posted by RynoB

I was in Jackson Hole (JAC) over the weekend--About 6500' elevation. The controller stated the temp (18 C) on ATIS followed by "check density altitude." I know why controllers say it, but when is it required to be stated?

I believe when the official WX advisory the ATC folks receive contains a density altitude advisory, then they include it, along with all other pertinent info in that report. Items such as wind direction/speed and altimeter can be read from the instruments in the tower.

ATIS gets interesting when you get the "remarks; warning, RPG and small arms/automatic weapons fire in progress on 5 mile to 2 mile final for runway 32. High TRP recoveries in progress...Low TRP not recommended."

[ATC RET 2003]

An advisory to check density altitude is issued to departing GA aircraft at airports with field elevations of 2000' MSL and above based on the following:

Field Elevations (MSL) Broadcast Advisory When
Temperature is

2,000 to 2,999 85°F and higher

3,000 to 3,999 80°F and higher

4,000 to 4,999 75°F and higher

5,000 to 5,999 70°F and higher

6,000 to 6,999 65°F and higher

7,000 and higher 60°F and higher

[RynoB]

Originally Posted by ATC RET 2003

An advisory to check density altitude is issued to departing GA aircraft at airports with field elevations of 2000' MSL and above based on the following:

Field Elevations (MSL) Broadcast Advisory When
Temperature is

2,000 to 2,999 85°F and higher

3,000 to 3,999 80°F and higher

4,000 to 4,999 75°F and higher

5,000 to 5,999 70°F and higher

6,000 to 6,999 65°F and higher

7,000 and higher 60°F and higher

thanks for the reply.