FVXX21 KWBC 170730 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0730 UTC 17 MAR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-323 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 6 HOUR WIND FORECAST FROM THE 17/0000 UTC AVIATION MODEL. . ERUPTION DETAILS: EMISSIONS OF GASES AND ASH. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 17/0645 UTC SHOWS THE AREA AROUND THE VOLCANO OBFUSCATED BY LAYERED CLOUDS THUS MAKING DETECTION OF ASH DIFFICULT. IN ADDITION..ASH THAT WAS SEEN EARLIER THIS EVENING IS NO LONGER VISIBLE. TRAJECTORY: ANY REMAINING ASH AT FL190 WOULD MOVE TO THE WEST-NORTHWEST AT 20 KTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 17/1330 UTC. . 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/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . WALTER . NNNN