Issue time:

Colour code


Date: 2014-09-11 19:00 UTC
Volcano:St. Helens
Area: Us
Source: Goes-east. Pilot Report.
Aviation colour code: 
Summit elevation:  8363 ft [2549 m]
Eruption Details: resuspended va due to high winds

Volcano ash cloud Us - St. Helens   Thursday 11 Sep 2014 19:00 UTC

Remarks: no eruption is occurring. a pirep indicatedblowing va to fl085 at 1750z. stlt imagery showeda narrow plume extending 20 nmi wnw of the

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.