FVXX21 KWBC 170900
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0900 UTC 17 APR 2000 BY THE WASHINGTON VAAC 
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TUNGURAHUA 00-452        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 INFRARED AND MULTISPECTRAL
IMAGERY...NATIONAL WEATHER SERVICE FORECAST MODEL DATA.
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ERUPTION DETAILS: NEARLY CONTINUOUS GAS EMISSIONS WITH
OCCASIONAL ASH EMISSIONS.
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DETAILS OF ASH: SATELLITE IMAGERY OVER THE LAST 4 TO 5 HOURS
ENDING THROUGH 0815 UTC SHOWS NO SIGNS OF ASH OR STEAM. THE
GEOPHYSICAL INSTITUTE HAS NOT REPORTED ANY RECENT ERUPTIONS OR
ASH EMISSIONS. THERE IS AN ABUNDANCE OF CLOUDINESS IN THE
REGION WHICH IS OBSCURING THE SUMMIT. ANY ASH AND STEAM THAT
IS PRESENT WILL LIKELY BE EMBEDDED IN THESE CLOUDS. THE LAST
HEIGHT ASSESSMENT WAS FL220 BASED ON SATELLITE INTERPRETATION
AND MODEL GUIDANCE.
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TRAJECTORY: ASH AND STEAM FROM THE SUMMIT TO FL220 IS EXPECTED
TO MOVE TO THE SOUTHWEST AT 10 TO 20 KNOTS.
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OUTLOOK: SEE SIGMETS.
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THE NEXT STATEMENT WILL BE ISSUED BY 17/1500 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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ORRISON
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