NOCN04 CWAO 201930
GENOT NO.009

VOUS TROUVEREZ LA VERSION FRANCAISE DE CE GENOT DANS LE
GENOT NOCN04 NO.010.

NEW VOLCANIC ASH BULLETINS FROM THE MONTREAL VAAC...

AS OF FEBRUARY 20 1998, THE CANADIAN METEOROLOGICAL CENTRE (DESIGNATED
AS THE MONTREAL VOLCANIC ASH ADVISORY CENTRE BY THE INTERNATIONAL
CIVIL AVIATION ORGANIZATION) WILL PREPARE AND ISSUE VOLCANIC ASH
MESSAGES WHENEVER ITS AREA OF RESPONSIBILITY IS AFFECTED BY A
VOLCANIC ASH CLOUD.

THE AREA OF RESPONSIBILITY OF VAAC MONTREAL IS ALL OF CANADA
(INCLUDING THE ARCTIC), GREENLAND, PORTIONS OF THE ARCTIC TO THE
NORTH AND EAST OF GREENLAND AND A PORTION OF THE NORTH ATLANTIC
CORRESPONDING TO GANDER OCEANIC FLIGHT INFORMATION REGION.

MESSAGES WILL BE ISSUED IN PLAIN ENGLISH AND NORMALLY UPDATED
EVERY 6 HOURS FOR AS LONG AS THE SITUATION WARRANTS UNDER THE
FOLLOWING HEADERS:

FVCN01 CWAO
FVCN02 CWAO
FVCN03 CWAO
FVCN04 CWAO

MOST OF THE TIME MESSAGES WILL BE ISSUED UNDER FVCN01 CWAO HEADERS,
UNLESS THE AREA OF RESPONSIBILITY IS AFFECTED BY ASH CLOUDS PRODUCED
BY TWO (OR MORE) DIFFERENT VOLCANOES. IN THE LATTER CASE, FVCN02
(AND THE FOLLOWING HEADER NUMBERS, IF NECESSARY) WILL BE USED TO
CARRY INFORMATION ON THESE ASH CLOUDS ASSOCIATED TO OTHER VOLCANOES.

THE FORMAT OF THESE MESSAGES WILL BE AS FOLLOWS:

FVCN(01 TO 04) CWAO DDHHMM
VOLCANIC ASH ADVISORY STATEMENT ISSUED BY THE MONTREAL VOLCANIC ASH
ADVISORY CENTRE AT (TIME IN UTC DAY MONTH YEAR)

(NAME OF VOLCANO, BULLETIN NUMBER, STATE OR AREA IN WHICH VOLCANO IS
LOCATED, LATITUDE AND LONGITUDE OF VOLCANO IN DEGREES AND TENTHS OF
DEGREES)

BACKGROUND INFORMATION: (COMPLETE NAME OF THE VOLCANO, REFERENCE
NUMBER OF THE VOLCANO AS DEFINED IN THE SMITHSONIAN INSTITUTION -
VOLCANOES OF THE WORLD SECOND EDITION, SUMMIT HEIGHT OF VOLCANO IN
METERS)

SOURCE(S) OF INFORMATION: (PILOT REPORT, VOLCANO OBSERVATORY,
SATELLITE IMAGERY, ETC.)

DETAILS OF ERUPTION: (TIME UTC, DAY, MONTH, YEAR)

DETAILS OF ASH CLOUD: (AS AVAILABLE FROM THE INFORMATION SOURCES)

TRAJECTORY OF ASH CLOUD: (DETAILS ON THE DISPLACEMENT OF THE ASH
CLOUD)

OUTLOOK: SEE LATEST CANERM DISPERSION MODEL RUN AND SIGMETS

NEXT ADVISORY EXPECTED TO BE ISSUED AROUND (DAY, TIME UTC)

PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS

MCBEAN/ADMA/TORONTO