FVXX21 KWBC 181900
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1900 UTC 18 APR 2000 BY THE WASHINGTON VAAC
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TUNGURAHUA 00-458 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. 6 HOUR WIND FORECAST FROM THE 18/1200
UTC AVIATION MODEL. APRIL 18 REPORT FROM THE GEOPHYSICAL
INSTITUTE.
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ERUPTION DETAILS: OCCASIONAL ASH EMISSIONS.
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DETAILS OF ASH: SATELLITE IMAGERY THROUGH 18/1745 UTC
CONTINUES TO SHOW A WELL DEFINED PLUME EXTENDING TOWARDS THE
WEST-NORTHWEST AWAY FROM THE SUMMIT. THIS PLUME IS 149 KM
(80 NMI) IN LENGTH AND 10-20 KM (5-10 NMI) WIDE AND EXTENDS TO
THE POINT: 0050S 7935W. AT 18/1528 UTC THE GEOPHYSICAL
INSTITUTE REPORTED ASH OVER THE VOLCANO TO FL290 MOVING
TOWARDS THE NORTHWEST.
TRAJECTORY: WEST-NORTHWEST AT 10 KNOTS
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THE NEXT STATEMENT WILL BE ISSUED BY 19/0100 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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WALTER
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NNNN"Attached Graphic Map Depicting Ash"
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