FVXX21 KWBC 281400
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 1400 UTC 28 OCTOBER 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-041      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 
NATIONAL WEATHER SERVICE NUMERICAL WEATHER MODEL DATA.  
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ERUPTION DETAILS: OCCASIONAL VENTING OF ASH AND STEAM.
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DETAILS OF ASH: GOES-8 SATELLITE IMAGERY THROUGH 28/1315 UTC SHOWED
A PLUME OF STEAM AND ASH MOVING SOUTHWEST FROM THE VOLCANO.  A HOT
SPOT WAS ALSO NOTED.  THE PLUME IS ESTIMATED TO BE BELOW FL250. AT
1315Z THE PLUME EXTENDED FROM THE SUMMIT SOUTHWEST (220 DEGREES)
AROUND 28 NMI AND WAS ROUGHLY 9 NMI WIDE AND WAS MOVING AROUND 12
KNOTS. 
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TRAJECTORY: MODEL DATA INDICATES THAT ASH BETWEEN FL190 AND FL250 
WOULD MOVE TOWARD SOUTHWEST BETWEEN 10 AND 20 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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THE NEXT STATEMENT WILL BE ISSUED AROUND 28/2000 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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