FVXX21 KWBC 140730
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0730 UTC 14 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-245        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...U.S. NUMERICAL MODEL WIND FORECASTS...GEOPHYSICAL
INSTITUTE REPORT AND WIND DATA
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ERUPTION DETAILS: CONTINUOUS VENTING OF LIGHT ASH AND
STEAM...OCCASIONAL WEAK TO MODERATE EXPLOSIONS WITH THICKER ASH
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DETAILS OF ASH: GOES-8 IMAGERY SHOWS A SMALL FAINT ASH PLUME AT
ABOUT FL200 EXTENDING FROM THE SUMMIT TOWARD THE WEST NORTHWEST. 
THE DISCERNIBLE PLUME IS ABOUT 38 KM (21 NMI) LONG AND 15 KM (8 NMI)
WIDE AND EXTENDS TO THE POINT 1.3S 78.7W.  HOWEVER THE ACTUAL PLUME
MIGHT BE LARGER BUT PARTLY OBSCURED BY WEATHER CLOUDS.   
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TRAJECTORY: ASH IS MOVING TOWARD THE WEST NORTHWEST AT 10 TO 15
KNOTS. 
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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
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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 14/1330 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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"Attached Graphic Map Depicting Ash" 

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