FVXX21 KWBC 281300
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1300 UTC 28 DEC 1999 BY THE WASHINGTON VAAC 
.
TUNGURAHUA 99-305         ECUADOR 1.47S 78.44W 
.
BACKGROUND:    TUNGURAHUA ECUADOR (1502-08)
               SUMMIT HEIGHT 16480 FT (5023 M)
.
SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL
IMAGERY. INSTITUTE GEOFISICO REPORT AND WIND DATA AND MODEL FORECAST
FROM THE 28/0600 UTC AVIATION MODEL.
.
ERUPTION DETAILS: ASH PLUME BECAME EVIDENT IN 1115 UTC IMAGERY. 
.
DETAILS OF ASH: SATELLITE IMAGERY THRU 1215 UTC SHOWS A FAINT NARROW
PLUME OF ASH EXTENDING SOUTH SOUTHWEST (210 DEGREES) FROM THE
VOLCANO ROUGHLY 55KM (30 NMI) TO POINT 1.5S 78.4W AND WAS AROUND 11
KM (6 NMI) WIDE. THE HEIGHT IS ESTIMATED BELOW FL240. 
.
TRAJECTORY: ASH BELOW FL240 WILL MOVE TOWARDS THE SOUTH TO SOUTH
SOUTHWEST AROUND 10 TO 15 KNOTS.
.
REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH
ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH
LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS  
http://www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
.
OUTLOOK:  SEE SIGMETS.
.
EFFECTIVE JANUARY 3 2000 AT 0000 UTC... ALL REFERENCES TO LATITUDE
AND LONGITUDE IN VOLCANIC ASH ADVISORY STATEMENTS WILL BE IN DEGREES
AND MINUTES OF A DEGREE.  EXAMPLE: 16.70N 62.20W  WILL BE 1642N6212W
.
THE NEXT STATEMENT WILL BE ISSUED BY 28/1900 UTC.
.
PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
.
NNNN
"Attached Graphic Map Depicting Ash" 

""