And again, in "Donelle", Airmet
contrasts his partner's wit with tenderness:
No, additional AIRMET
information could be in the text.
However the computer modeling that was done nailed down a few of the hazards in much more detail than we usually get from the generalized tone of SIGMETs and AIRMETs
. What is certain is all of Montana's mountain ranges were capped with orographic clouds and mountain wave activity, and were comprised of shallow but extensive convection due to a layer of instability between the surface and 12,000 feet.
Data feeds, such as from the Avidyne MLB700 broadcast weather receiver, may omit basic information that cannot be displayed, such as the altitudes of AIRMETs
, making their horizontal extent less useful or even misleading.
In the case of our departure from Manassas, an Airmet
Zulu for icing is in effect from 2000 feet msl to 12,000 feet.
The first tab is Adverse Conditions, with Conv SIG and AIRMET
in bold identifying content.
This is where you may find an Airmet
covering your proposed route and time, including advisories for mountain obscuration (Airmet
Sierra), icing (Airmet
Zulu) and turbulence (Airmet
The day of my departure, however, Airmet
Sierra was in effect and the mountains were obscured.
A less urgent report than a PIREP, as an AIRMET
is to a SIGMET
The pilot obtained a weather briefing at 9:20 AM, and was given an AIRMET
for IFR and icing above 13,000 feet.
This leaves AIRMETs
Sierra describes IFR conditions and mountain obscuration.
But, an Airmet
Zulu or freezing temperatures shouldn't prevent an IFR flight.