SIGMET

What those are, a SIGMET is a significant, severe meteorological event.

CNN Transcript Feb 16, 2009 2009

They had -- I'm sorry, on the SIGMET, the turbulent SIGMET, they had Victor 6.

CNN Transcript Feb 16, 2009 2009

There was a SIGMET in effect that night, but it was for turbulence, it was not for icing.

CNN Transcript Feb 16, 2009 2009

In addition, the en-route SIGMETS and Flight Plan Guidance provide forecasts for turbulence, convection, and icing, as well as up-to-the-minute Auto Plotted SIGMET and AIRMET charts showing boundaries of in-flight advisories.

Aero-News Network 2009

An AIRMET (it may have been a SIGMET, they're identical in format) warns of a hazardous condition affecting an area.

Cockpit Conversation 2009

Or don't US SIGMETs end with a cancelling SIGMET, like this.

Cockpit Conversation 2009

SIGMETs are issued for ICAO-mandated hazardous conditions and AIRMETs for country specific hazards that don't meet SIGMET-nastiness criteria.

Cockpit Conversation 2009

In addition, the en-route SIGMETS and Flight Plan Guidance provide forecasts for turbulence, convection, and icing, as well as up-to-the-minute Auto Plotted SIGMET and AIRMET charts showing boundaries of in-flight advisories.

Aero-News Network 2009

In Canada, the boundaries of a SIGMET or AIRMET are given in lat-long coordinates, with directions and distances to airports in parentheses, so you don't need to know where YQT is to find it on your chart.

Cockpit Conversation 2009

You can see that the format of the SIGMET above is pretty much like the US one, but with lat-long coordinates and spelled out place names in place of airport identifiers.

Cockpit Conversation 2009