FVXX21 KWBC 232225 VOLCANIC ASH ADVISORY STATEMENT ISSUED 2225 UTC 23 MAR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-350 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY...1200 UTC AVIATION MODEL FORECAST SOUNDING DATA. . ERUPTION DETAILS: OCCASIONAL SMALL EXPLOSIONS REPORTED. . DETAILS OF ASH: THE LATEST SATELLITE IMAGE THROUGH 23/2145 UTC SHOWS AN ABUNDANCE OF CLOUDINESS INVOLVING SHOWER AND THUNDERSTORM ACTIVITY OVER AND ADJACENT TO THE SUMMIT. THERE IS NO ASH DETECTED IN SATELLITE IMAGERY AT THIS TIME. HOWEVER A SURFACE REPORT FROM RIOBAMBA IN THE LAST HOUR HAS INDICATED VOLCANIC ASH OVER THE SUMMIT. IT IS HARD TO ASCERTAIN WHAT ALTITUDE IT IS REACHING BUT BASED ON RECENT ACTIVITY THE ASH MAY BE REACHING AS HIGH AS FL240. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL240 SHOULD MOVE TO THE WEST-NORTHWEST AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 24/0430 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. . ORRISON . NNNN