FVXX21 KWBC 301430 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1430 UTC 30 MAR 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-378 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. 30/1200 UTC UPPER WIND FORECAST FROM THE 30/0000 UTC AVN MODEL. . ERUPTION DETAILS: CONTINUOUS GAS EMISSIONS WITH OCCASIONAL ASH EXHALATIONS. . DETAILS OF ASH: GOES-8 IMAGERY THROUGH 1415 UTC DOES NOT SHOW ANY DISCERNABLE ASH. THE VOLCANO IS PARTIALLY OBSCURED BY GRAVITY WAVE CLOUDS FORMING IN THE LOW LEVEL NORTHEASTERLY FLOW. TUNGURAHUA REMAINS IN A HIGHLY ACTIVE STATE AND COULD PRODUCE A SIGNIFICANT ERUPTION AT ANYTIME. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH UP TO FL300 TO MOVE SOUTHWEST AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 30/2030 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. . HUGHES . NNNN