FVXX21 KWBC 271100 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1100 UTC 27 MAY 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-619 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY...GUAYAQUIL METEOROLOGICAL WATCH OFFICE..UPPER AIR WIND FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: OCCASIONAL GAS AND ASH EMISSIONS. . DETAILS OF ASH: EXTENSIVE LOW AND MID LEVEL CLOUDS THROUGH 1015 UTC MAKE IT DIFFICULT TO DETECT ANY ASH OR STEAM IN THE AREA AROUND THE VOLCANO. THE LATEST REPORT OF AN ERUPTION WAS AT 26/2000 UTC. THE VOLCANO REMAINS UNSTABLE AND AN ERUPTION OF GAS AND ASH CAN OCCUR AT ANY TIME. . TRAJECTORY: UPPER AIR WIND PATTERNS SUGGEST THAT ANY ASH BETWEEN THE SUMMIT AND FL250 WOULD MOVE TO THE WEST AT 15 TO 25 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 27/1700 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. . KARST . NNNN