FVXX21 KWBC 051835 VOLCANIC ASH ADVISORY ISSUED: 2001JUL05/1835Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/93. . INFORMATION SOURCE: GUAYAQUIL METEOROLOGICAL WATCH OFFICE. GEOPHYSICAL INSTITUTE. GOES-8 SATELLITE IMAGERY. UPPER AIR FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: AIRCRAFT REPORT OF ASH AT 1810Z OVER VOLCANO. . DETAILS OF ASH CLOUD: AN AIRCRAFT REPORT INDICATES THAT THERE IS AN ASH CLOUD THAT HAS JUST REACHED FL250 OVER THE VOLCANO. SATELLITE IMAGERY THROUGH 05/1745Z DOES NOT INDICATE ANY ASH. CLOUDINESS IS INCREASING OVER THE SUMMIT WHICH WILL MAKE IT GENERALLY DIFFICULT TO DISCERN ANY ASH. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL250 SHOULD MOVE WEST AT 10 TO 20 KTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 06/0030Z. . REAL TIME SATELLITE IMAGERY AND 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/KARST . NNNN