FVXX21 KWBC 100500 VOLCANIC ASH ADVISORY ISSUED: 2001AUG10/0500Z VAAC: WASHINGTON . VOLCANO: POPOCATEPETL 1401-09 LOCATION: 1901N 9837W AREA: MEXICO . SUMMIT ELEVATION: 17930 FT (5465 M) . ADVISORY NUMBER: 2001/89 . INFORMATION SOURCE: MEXICO CITY METEOROLOGICAL WATCH OFFICE. GOES-8 MULTISPECTRAL AND INFRARED SATELLITE IMAGERY. MEXICO ITY 10/0000Z UPPER AIR SOUNDING. SIX HOUR WIND FORECAST FROM THE 10/0000Z AVIATION MODEL. . ERUPTION DETAILS: REPORTED ASH RELEASE AT 10/0400Z. . DETAILS OF ASH CLOUD: THERE WAS A REPORT AT 10/0400Z OF VOLCANIC ACTIVITY WITH AN ASH RELEASE TO APPROXIMATELY FL250. SATELLITE IMAGERY THROUGH 10/0445Z DOES NOT SHOW ANY ASH ALTHOUGH THERE ARE CLOUDS IN THE AREA OF THE SUMMIT MAKING ASH DETECTION DIFFICULT AT THIS TIME. . TRAJECTORY: ASH AT FL250 WILL MOVE TOWARDS THE SOUTHWEST AT 10 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 10/1100Z. . 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. . WALTER . NNNN