FVXX21 KWBC 250120 VOLCANIC ASH ADVISORY ISSUED 0120 UTC 25 JUL 2000 BY THE WASHINGTON VAAC . TUNGURAHUA 00-867 ECUADOR 0128S 7826W . BACKGROUND: TUNGURAHUA ECUADOR (1502-08) SUMMIT HEIGHT 16480 FT (5023 M) . SOURCES OF INFORMATION: GOES-8 INFRARED...AND MULTISPECTRAL IMAGERY. UPPER-LEVEL WIND FORECAST DATA. . ERUPTION DETAILS: OCCASIONAL EMISSIONS OF ASH AND STEAM. . DETAILS OF ASH: GOES-8 IMAGERY THROUGH 25/0015 UTC DOES NOT INDICATE ANY AREAS OF ASH OR STEAM. HOWEVER THERE IS AN ABUNDANCE OF CLOUDINESS IN THE REGION HELPING TO OBSCURE THE SUMMIT. IF ANY ACTIVITY IS OCCURRING IT IS BELIEVED TO BE NEAR-SUMMIT AT THIS TIME. . TRAJECTORY: UPPER AIR PATTERS SUGGEST ANY ASH AT OR NEAR SUMMIT LEVEL SHOULD MOVE SOUTHWEST AT 10 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 25/0730 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. . ORRISON . NNNN