FVXX20 KWBC 231630 VOLCANIC ASH ADVISORY ISSUED: 2001MAR23/1630 VAAC: WASHINGTON . VOLCANO: TUNGURAHUA 1502-08 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 16480 FT (5023 M) . ADVISORY NUMBER: 2001/41 . INFORMATION SOURCE: GOES-8 VISIBLE AND INFRARED AND MULTISPECTRAL IMAGERY. GEOPHYSICAL INSTITUTE IN QUITO. . ERUPTION DETAILS: VOLCANIC ASH CLOUD AT 23/1530Z. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE REPORTS THERE WAS A BRIEF ASH EMISSION FROM THE VOLCANO AT 23/1530Z TO FL290. EXTENSIVE CLOUDS OVER THE VOLCANO MAKE IT DIFFICULT TO SEE ANY ASH CLOUD IN SATELLITE IMAGERY. THE ASH CLOUD WAS OBSERVED MOVING NORTHWEST. . TRAJECTORY: ACCORDING TO UPPER AIR FORECASTS FROM THE AVIATION MODEL ASH UP TO FL290 SHOULD MOVE TO THE WEST OR NORTHWEST AT 10 KTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED AT 23/2230Z. . 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