FVXX20 KWBC 261900 VOLCANIC ASH ADVISORY ISSUED: 2001NOV26/1900Z VAAC: WASHINGTON . VOLCANO: GUAGUA PICHINCHA 1502-02 LOCATION: 0011S 7836W AREA: ECUADOR . SUMMIT ELEVATION: 15695 FT (4784 M) . ADVISORY NUMBER: 2001/007 . INFORMATION SOURCE: GUAYAQUIL MWO...GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. SIX HOUR WIND FORECAST FROM THE 26/1200Z AVIATION MODEL. . ERUPTION DETAILS: POSSIBLE ASH OVER THE SUMMIT OBSERVED AT 26/1809Z. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE REPORTED A POSSIBLE ASH CLOUD OVER THE SUMMIT AT 26/1809Z. SATELLITE IMAGERY THROUGH 26/1815Z DOES NOT INDICATE ANY ASH. HOWEVER IT MUST BE NOTED THAT THERE ARE NUMEROUS CLOUDS IN THE AREA OF THE SUMMIT. ASH IS BELIEVED TO BE AT OR JUST ABOVE SUMMIT LEVEL. . TRAJECTORY: ANY ASH AT ABOUT FL170 WILL MOVE TOWARDS THE SOUTH AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THIS WILL BE THE ONLY MESSAGE FOR THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . WALTER . NNNN