FVXX21 KWBC 202330
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2330 UTC 20 MAR 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-338         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. 21/0000 UTC WIND FORECAST FROM THE
20/1200 UTC AVN MODEL. NOAA-14 VISIBLE...INFRARED AND
MULTISPECTRAL IMAGERY.
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ERUPTION DETAILS: LAST ERUPTION AT 20/1640 UTC.
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DETAILS OF ASH: THE ASH FROM THE PREVIOUS ERUPTION HAS
DISSIPATED ENOUGH THAT IT IS NOT DETECTABLE IN GOES IMAGERY
THROUGH 2315 UTC AND HIGH RESOLUTION NOAA-14 IMAGERY AT 2124
UTC. EXTRAPOLATION OF THE ASH CLOUD FROM THE 1640 UTC ERUPTION
PUTS IT WITHIN 25 KM (14 NMI) OF A POINT 0036S 7956W. THE
HEIGHT IS ESTIMATED TO BE AT FL300. AGAIN...THIS CLOUD CAN NOT
BE SEEN IN CURRENT SATELLITE IMAGERY. 
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH AT FL300 WOULD
MOVE WEST NORTHWEST AT 15 TO 20 KNOTS. ASH BETWEEN FL300 AND
FL200 WOULD MOVE WEST AT 15 KNOTS. ASH BELOW FL200 WOULD MOVE
WEST AT 5 TO 10 KNOTS.
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OUTLOOK: SEE SIGMETS AND VAFTAD.
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THE NEXT STATEMENT WILL BE ISSUED BY 21/0530 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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HUGHES
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