FVXX20 KWBC 251710 VOLCANIC ASH ADVISORY ISSUED: 2001MAY25/1710Z VAAC: WASHINGTON . VOLCANO: GUAGUA PICHINCHA 1502-02 LOCATION: 0128S 7826W AREA: ECUADOR . SUMMIT ELEVATION: 15695 FT (4784 M) . ADVISORY NUMBER: 2001/05 . INFORMATION SOURCE: GUAYAQUIL SIGMET...GEOPHYSICAL INSTITUTE...GOES 8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. AVIATION MODEL WIND FORECAST. . ERUPTION DETAILS: POSSIBLE VOLCANIC ASH REPORTED AS OF 25/1610Z. . DETAILS OF ASH CLOUD: THE GEOPHYSICAL INSTITUTE REPORTS THAT ASH MAY BE VENTING FROM THE THE SUMMIT AND REACHING FL280. SATELLITE IMAGERY SHOWS NO SIGNS OF ASH THROUGH 1645Z. THERE IS AN INCREASE IN CLOUDINESS WHICH WILL HELP TO INHIBIT ASH DETECTION HERE THIS AFTERNOON. . TRAJECTORY: ANY ASH THAT MAY EXIST FROM SUMMIT LEVEL TO FL280 SHOULD MOVE WEST AT 10 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 25/2300Z. . 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 . NNNN