FVXX21 KWBC 110830  
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0820 UTC 11 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-233        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  MULTISPECTRAL AND INFRARED 
IMAGERY...U.S. NUMERICAL MODEL WIND FORECASTS
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ERUPTION DETAILS: CONTINUOUS EMISSION OF ASH AND STEAM WITH
OCCASIONAL LARGER PUFFS
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DETAILS OF ASH: SATELLITE IMAGERY THROUGH 0745 UTC INDICATED
WEAKENING THUNDERSTORMS IN THE VICINITY OF THE VOLCANO.  THE
CONVECTIVE DEBRIS FROM THESE THUNDERSTORMS PRECLUDED THE DETECTION
OF LOWER LEVEL ASH IN SATELLITE IMAGERY. 
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TRAJECTORY: ANY ASH UP TO FL250 WOULD MOVE TOWARDS THE WEST 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 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 11/1430 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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TURK
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