FVXX21 KWBC 172345 VOLCANIC ASH ADVISORY ISSUED: 2001AUG17/2345Z VAAC: WASHINGTON . VOLCANO: POPOCATEPETL 1401-09 LOCATION: 1901N 9837W AREA: MEXICO . SUMMIT ELEVATION: 17930 FT (5465 M) . ADVISORY NUMBER: 2001/91 . INFORMATION SOURCE: MEXICO CITY METEOROLOGICAL WATCH OFFICE. GOES-8 VISIBLE MULTISPECTRAL AND INFRARED SATELLITE IMAGERY. 12 HOUR WIND FORECAST FROM THE 17/1200Z AVIATION MODEL. . ERUPTION DETAILS: REPORTED ASH RELEASE AT 17/2014Z. . DETAILS OF ASH CLOUD: THE MEXICO CITY MWO REPORTS AN ASH RELEASE AT 2014Z WITH ASH UP TO FL240. GOES-8 SATELLITE IMAGERY THROUGH 17/2215Z DOES NOT SHOW ANY ASH PLUME HOWEVER AN OCCASIONAL HOTSPOT IS SEEN IN THE SHORTWAVE IMAGERY. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL240 WILL MOVE WEST AT 10 TO 20 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 18/0500Z. . INTERNET URLS... MESSAGE LISTSERV WWW.SSD.NOAA.GOV/VAAC/SUBSCRIBE.HTML MESSAGES GRAPHICS AND IMAGERY WWW.SSD.NOAA.GOV/VAAC/WASHINGTON.HTML (ALL LOWERCASE EXCEPT /VAAC/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . WALTER . NNNN