FVXX21 KWBC 252130
VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 2130 UTC 25 APR 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-487         ECUADOR 0128S 7826W 
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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 WINDS FORECAST FROM THE AVIATION
MODEL. THE GEOPHYSICAL INSTITUTE IN QUITO.
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ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS.   
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DETAILS OF ASH: THE GEOPHYSICAL INSTITUE REPORTS VOLCANIC ASH
OVER THE VOLCANO AT 25/2048 UTC TO FL320. AN AIRCRAFT
OBSERVATION REPORTS VOLCANIC ASH OVER THE VOLCANO TO FL260
MOVING WEST. SATELLITE IMAGERY THROUGH 2045 UTC SHOWS A HOT
SPOT IN NEAR INFRARED IMAGERY OVER THE VOLCANO AND OCCASIONAL
SMALL ASH EMISSIONS MOVING WESTWARD. 
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH UP TO FL320
WOULD MOVE TO THE WEST AT 15 TO 20 KNOTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT STATEMENT WILL BE ISSUED BY 26/0330 UTC.
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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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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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KARST
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