FVXX20 KWBC 181820 VOLCANIC ASH ADVISORY ISSUED: 2003OCT18/1830Z VAAC: WASHINGTON VOLCANO: TUNGURAHUA 1502-08 LOCATION: S0128W07826 AREA: ECUADOR SUMMIT ELEVATION: 16480 FT (5023 M) ADVISORY NUMBER: 2003/383 INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. ERUPTION DETAILS: CONTINUED ASH AND STEAM EXHALATIONS. OBS ASH DATE/TIME: 18/1745Z OBS ASH CLOUD: ASH NOT IDENTIFIABLE FROM SATELLITE DATA. WINDS FL100/240 MOVING S 10-15 KNOTS. FCST ASH CLOUD+6H: SEE SIGMETS REMARKS: AN OCCASIONAL HOT SPOT CAN STILL BE DETECTED IN MULTISPECTRAL IMAGERY. SATELLITE IMAGERY DOES NOT SHOW ANY ASH THROUGH 1745Z DUE TO WEATHER CLOUDS OVER THE VOLCANO. ACCORDING TO UPPER AIR MODEL WINDS ANY ASH TO FL240 SHOULD MOVE TOWARDS THE S AT 10-15 KNOTS. NEXT ADVISORY: WILL BE ISSUED BY 2003OCT19/0030Z. NNNN