When there's new ATIS info available and the altimiter setting has changed, what's the official phraseology for making the announcement to all the aircraft on the frequency? I'm looking in the FAA ATC phraseology doc FAA order JO 7110.65W, but I don't see it.
My best guess would be something like "Phoenix traffic, information sierra is current, Phoenix altimiter two niner niner eight".
The tower will usually broadcast a note such as “Attention all aircraft: ATIS information Victor is now current. Wind two two zero at seven knots. Altimeter three zero one four”. This isn’t official phraseology and really isn’t required of ATC, but is a courtesy call to all pilots operating around the airport to retrieve the latest ATIS broadcast for reference.
You're looking for JO 7110.65 paragraph 2–9–2d. There is no "official" PHRASEOLOGY defined there, but it does specify that controllers need to make a general broadcast which includes an update to pertinent information and provides some examples.
d. Advise aircraft of changes to the ATIS code by broadcasting the change on all appropriate frequencies. The broadcast must include changes to pertinent operational information, when known, that necessitated the ATIS change.
EXAMPLE- “Attention all aircraft, information ALPHA current.” “Attention all aircraft, information BRAVO current. MICROBURST advisories in effect.” “Attention all aircraft, information CHARLIE current. Numerous flocks of ducks in the immediate vicinity of (name) airport, altitude unknown.”
No additional acknowledgement is required when a controller broadcasts information subsequent to the pilot's initial acknowledgement of the ATIS. [snip]
Pertinent conditions are those that have a clear decisive relevance to the safety of air traffic. As noted in paragraph 2-1-2, Duty Priority, there are many variables involved that make it virtually impossible to develop a standard list... [etc, etc, use best judgment].
There have been many occasions when we were monitoring Tower, or Approach, both before and after contacting either, and heard a one time a announcement that the ATIS had been updated, with phraseology as you indicate. I don't recall if the altimeter was included. Altimeter is given out pretty liberally to anyone contacting Approach/Tower, so you can pick that up if you can determine you are in the same area (have to pay attention, particularly for approach, as they cover a wider area).
The Navy uses the call sign 99 when the transmission applies to all. “99 information charlie is current.” I realize this doesn’t apply in the general sense, but it is an example of what you were asking about.