FVXX21 KWBC 071850 VOLCANIC ASH ADVISORY ISSUED: 2001JUL07/1850Z VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/98. . INFORMATION SOURCE: GUAYAQUIL METEOROLOGICAL WATCH OFFICE. GEOPHYSICAL INSTITUTE. GOES-8 SATELLITE IMAGERY. . ERUPTION DETAILS: OBSERVATION AT 07/1815Z ASH OVER VOLCANO. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE AND AN AIR CRAFT OBSERVED ASH OVER THE VOLCANO TO FL250. EXTENSIVE CLOUDS COVER THE REGION OVER THE VOLCANO MAKING IT DIFFICULT TO DETECT ASH. . TRAJECTORY: ANY ASH TO FL250 WILL MOVE TO THE WEST. . OUTLOOK: SEE SIGMETS. . THIS WILL BE A ONE TIME MESSAGE UNLESS ADDITIONAL INFORMATION IS RECEIVED. . 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. . KARST . NNNN