FVXX21 KWBC 010730 
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0730 UTC 01 DEC 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-190       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 SATELLITE 
IMAGERY...AVIATION MODEL WIND FORECAST...REPORT FROM THE GEOFISICO
INSTITUTO 
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ERUPTION DETAILS: CONTINUOUS STEAM AND ASH EMISSIONS AND OCCASIONAL
EXPLOSIONS OF ASH.
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DETAILS OF ASH: GOES-8 SATELLITE IMAGERY SHOWS A FAINT AREA OF ASH
NORTH AND NORTHWEST OF THE VOLCANO.  AT 0645 UTC THE VISIBLE ASH IS
APPROXIMATELY BOUNDED BY 1.5S 78.4W TO 1.0S 78.8W TO 0.7S 78.5W TO
1.4S 78.3W TO 1.5S 78.4W.  ADDITIONAL ASH MIGHT BE PRESENT BUT
DIFFICULT TO SEE IN NIGHTTIME SATELLITE IMAGERY AGAINST THE
BACKGROUND OF LOW WEATHER CLOUDS COVERING THE AREA.
     UPPER AIR PATTERNS SUGGEST THAT THE OBSERVED ASH IS BETWEEN
FL230 AND FL300.  
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TRAJECTORY: ASH IS MOVING TOWARD THE NORTH AND 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 AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED BY 01/1330 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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STREETT
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NNNN"Attached Graphic Map Depicting Ash" 

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