FVXX21 KWBC 260530
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0530 UTC 26 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-295         ECUADOR 1.47S 78.44W 
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BACKGROUND:    TUNGURAHUA ECUADOR (1502-08)
               SUMMIT HEIGHT 16480 FT (5023 M)
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SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY...
0000 UTC AVIATION MODEL WIND FORECAST...WIND DATA PROVIDED BY THE
OBSERVATORY IN QUITO
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ERUPTION DETAILS: EMISSIONS OF ASH AND STEAM
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DETAILS OF ASH:  SATELLITE IMAGERY THROUGH 0445 UTC INDICATED THE
PRESENCE OF AN ASH PLUME ABOVE THE BROKEN MID AND HIGH LEVEL CLOUDS.
THIS ASH PLUME WAS FAIRLY NARROW AND MOVING NORTH OF THE VOLCANO. 
IN THE MOST RECENT IMAGE IT HAS BEGUN TO DISSIPATE.  THE ASH PLUME
EXTENDS 63 KM (34 NMI) NORTH OF THE VOLCANO AND IS 35 KM (19 NMI)
WIDE AT THE WIDEST POINT.  IT IS ROUGHLY BOUNDED BY 1.47S 78.44W TO
1.34S 78.36W TO 0.94S 78.32W TO 0.89S 78 58W AND 1.16S 78.63W.
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TRAJECTORY: ASH BETWEEN FL250 AND FL350 WOULD MOVE NORTH NORTHWEST 
AT 20-35 KTS
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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/)
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OUTLOOK:  SEE SIGMETS AND VAFTAD.
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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
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THE NEXT STATEMENT WILL BE ISSUED BY 26/1130 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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NNNN
"Attached Graphic Map Depicting Ash" 

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