FVXX21 KWBC 011750
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 1750 UTC 01 NOVEMBER 1999 BY THE WASHINGTON VAAC 
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TUNGURAHUA 99-060      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 VISIBLE..INFRARED AND MULTISPECTRAL
IMAGERY...UPPER AIR SOUNDING DATA...GUAYAQUIL METEOROLOGICAL WATCH
OFFICE.
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ERUPTION DETAILS...THE VOLCANO ERUPTED AT ABOUT 1245 UTC AS SEEN IN
SATELLITE IMAGERY.
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DETAILS OF ASH: SATELLITE IMAGERY AT 1645 UTC INDICATED THAT THE ASH
PLUME WAS BECOMING VERY DIFFUSE. SINCE THE PREVIOUS STATEMENT THE
ASH HAS BEEN OBSERVED MOVING TO THE SOUTH AND SOUTHWEST. THIS
MOVEMENT IS CONSISTENT WITH A HEIGHT TO FL350 BASED ON OBSERVED
UPPER AIR WINDS. AN ASH HEIGHT ALSO TO FL350 WAS PREVIOUSLY ASSIGNED
BASED ON AIRCRAFT REPORTS RELAYED BY THE GUAYAQUIL METEOROLOGICAL
WATCH OFFICE.
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AT 1645 UTC THE ASH CLOUD EXTENDS FROM 1.9S 78.4W TO 1.8S 78.7W TO
1.4S 79.2W AND IS 23 KM (12 NMI) WIDE. THIS IS ROUGHLY IN A
CLOCKWISE ARC FROM SOUTH THROUGH WEST OF THE VOLCANO.
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TRAJECTORY: ASH TO FL250 IS MOVING TO THE WEST AT 19 KT (35 KPH).
ASH BETWEEN FL250 AND FL350 IS MOVING TO THE SOUTH AND SOUTHWEST AT
15-20 KT (27-37 KPH).
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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 AROUND 02/0000 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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RUMINSKI
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NNNN
"Attached Graphic Map Depicting Ash" 

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