NOCN02 CWAO 251930
GENOT NO.009

GENOT NO. 009 EST LA VERSION ANGLAISE DU GENOT NO. 010

TRANSMISSION ON SATNET AND AMIS OF THE VOLCANIC ASH FORECAST 
CHARTS PRODUCED BY THE US NATIONAL WEATHER SERVICE AND BY 
ENVIRONMENT CANADA... 

BEGINNING ON 1 SEPTEMBER 1998, THE CANADIAN METEOROLOGICAL 
CENTRE WILL TRANSMIT ON SATNET AND AMIS THE FOLLOWING VOLCANIC 
ASH FORECAST CHARTS PRODUCED BY THE US NATIONAL WEATHER 
SERVICE USING THE FOLLOWING IDENTIFIERS:

A0191C D291 VAFTAD AVN P VOLCANIC ASH PART 1 00Z
A0192C D292 VAFTAD AVN P VOLCANIC ASH PART 2 00Z
A0193C D293 VAFTAD AVN P VOLCANIC ASH PART 1 12Z
A0194C D294 VAFTAD AVN P VOLCANIC ASH PART 2 12Z

THESE CHARTS ARE ISSUED FOR VOLCANIC ASH CLOUDS IN THE AREA OF 
RESPONSIBILITY OF VAAC WASHINGTON (CONTINENTAL UNITED-STATES, 
MEXICO, CENTRAL AMERICA, THE NORTHERN PART OF SOUTH AMERICA, 
THE CARIBBEAN AND LARGE PORTION OF THE ATLANTIC AND PACIFIC 
OCEANS) AND VAAC ANCHORAGE (ALASKA, THE ALEUTIANS, THE ARCTIC 
NORTH OF ALASKA, PORTIONS OF THE PACIFIC OCEAN NEIGHBORING THE 
ALEUTIANS AND THE BERING SEA). THE VAACS (VOLCANIC ASH ADVISORY
CENTRES) ARE DESIGNATED BY THE INTERNATIONAL CIVIL AVIATION 
ORGANIZATION. THE CHARTS CAN ALSO BE ISSUED IN TEST MODE AND IN 
WATCH MODE IN THE CASE OF VOLCANOES THREATENING TO ERUPT.

THE PART 1 CHARTS DEPICT A 12-HOUR AND 24-HOUR FORECAST. THE PART
2 CHARTS DEPICT A 36-HOUR AND 48 HOUR FORECAST. EACH CHART CONSISTS
OF 8 PANELS PRODUCED USING THE VAFTAD MODEL (VOLCANIC ASH FORECAST, 
TRANSPORT AND DISPERSION MODEL). THE 4 PANELS IN ANY COLUMN ARE FOR 
A SINGLE VALID TIME AFTER ERUPTION. INDIVIDUAL PANELS ARE FOR 
LAYERS APPLICABLE TO AVIATION OPERATIONS AND ARE IDENTIFIED AT THE 
SIDE OF A PANEL WITH UPPER AND LOWER FLIGHT LEVELS (FL) IN HUNDREDS 
OF FEET. THE BOTTOM PANEL IS A COMPOSITE FROM THE SURFACE TO FL550. 

FOR EACH COLUMN, THE FORECAST VALID TIME SEPARATES THE UPPER THREE 
PANELS FROM THE COMPOSITE PANEL. VOLCANO ERUPTION INFORMATION IS AT 
THE LOWER LEFT. A DESCRIPTION OF THE INPUT METEOROLOGY IS AT THE 
LOWER RIGHT WITH A MESSAGE TO SEE CURRENT SIGMET FOR WARNING AREA. 
THE VISUAL ASH CLOUD SYMBOL AND RUN DESCRIPTION ARE AT THE LOWER 
CENTER. 

FOR MORE INFORMATION ON VAFTAD, VAAC ANCHORAGE AND VAAC WASHINGTON, 
PLEASE REFER TO THE FOLLOWING WWW PAGES:
HTTP://WWW.ARL.NOAA.GOV/READY-BIN/VAFTAD.PL 
HTTP://WWW.ALASKA.NET/~AAWU/VAAC.HTML 
HTTP://HPSSD1EN.WWB.NOAA.GOV/SSD/ML/VAAC-DC.HTML
NOTE: ALL LOWER CASE EXCEPT UPPER CASE FOR SSD/ML. 

VAAC MONTREAL, LOCATED AT THE CANADIAN METEOROLOGICAL CENTRE, 
ALREADY ISSUES FORECAST CHARTS AND MESSAGES WHEN A VOLCANIC ASH 
CLOUD THREATENS ITS AREA OF RESPONSIBILITY CONSISTING OF 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. THE 
CHARTS ARE PRODUCED USING THE CANERM MODEL (CANADIAN EMERGENCY 
RESPONSE MODEL) AND ARE TRANSMITTED ON SATNET AND AMIS USING THE 
FOLLOWING IDENTIFIERS:

A0277C GLB AVN P VOLCANIC ASH 06, 12H 00Z
A0278C GLB AVN P VOLCANIC ASH 18, 24H 00Z
A0279C GLB AVN P VOLCANIC ASH 30, 36H 00Z
A0280C GLB AVN P VOLCANIC ASH 42, 48H 00Z
A0281C GLB AVN P VOLCANIC ASH 54, 60H 00Z
A0282C GLB AVN P VOLCANIC ASH 66, 72H 00Z
A0283C GLB AVN P VOLCANIC ASH 06, 12H 12Z
A0284C GLB AVN P VOLCANIC ASH 18, 24H 12Z
A0285C GLB AVN P VOLCANIC ASH 30, 36H 12Z
A0286C GLB AVN P VOLCANIC ASH 42, 48H 12Z
A0287C GLB AVN P VOLCANIC ASH 54, 60H 12Z
A0288C GLB AVN P VOLCANIC ASH 66, 72H 12Z
 
FOR MORE INFORMATION ON VAAC MONTREAL AND THE CANERM CHARTS, 
PLEASE REFER THE FOLLOWING WWW ADDRESS: 
HTTP://WWW.CMC.EC.GC.CA/CMC/CMOE/VAAC/A-VAAC.HTML
NOTE: ALL LOWER CASE EXCEPT UPPER CASE FOR CMOE AND A-.

MCBEAN/ADMA/TORONTO