Issue time:

Colour code

SFC/Flight Level 150


Date: 1969-12-31 23:00 UTC
Area: Guatemala
Source: Goes-east. Gfs Winds.
Aviation colour code: 
Summit elevation:  12346 ft [3763
Eruption Details: remnant lgt va invof summit

Volcano ash cloud Guatemala - Fuego   Wednesday 31 Dec 1969 23:00 UTC

Remarks: va appears no longer attached to summit.very lgt anddiffuse remnant ash extds for 30 nmi

This data supplements the official Volcanic Ash Advisory Graphics and Volcanic Ash Advisories. The data is to be used with caution. The official Volcanic Ash Graphics and Volcanic Ash Advisories take precedence in all circumstances. Please refer to national NOTAMs for definitive boundaries of no-fly areas.

Altitiude levels (International Standard Atmosphere)

SFC to FL200 - Ash concentrations between the surface and 20,000 feet.
FL200 to FL350 - Ash concentrations between 20,000 feet and 35,000 feet.
FL350 to FL550 - Ash concentrations between 35,000 feet and 55,000 feet.
SFC to 6000FT - Ash concentrations between the surface and 6,000 feet.