FVXX21 KWBC 191900 VOLCANIC ASH ADVISORY ISSUED 1900 UTC 19 JUN 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-717 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY. WIND FORECAST FROM AVIATION MODEL. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: SATELLITE IMAGERY THROUGH 19/1815 UTC SHOWS NO ASH ALTHOUGH CLOUDS ARE DEVELOPING ACROSS THE AREA. THE INSTITUTE REPORTS REDUCED ACTIVITY AT THE VOLCANO OVER THE PAST DAY HOWEVER IT REMAINS AT A VERY ACTIVE STATE AND COULD PRODUCE SIGNIFICANT ASH AT ANYTIME. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH FROM THE SUMMIT TO FL250 WOULD MOVE TOWARD THE NORTHWEST AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 20/0100 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORIES 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. . . NNNN