FVXX20 KWBC 041835 VOLCANIC ASH ADVISORY ISSUED 1835 UTC 04 AUG 2000 BY THE WASHINGTON VAAC . POPOCATEPETL 00-053 MEXICO 1901N 9837W . BACKGROUND: POPOCATEPETL MEXICO (1401-09) SUMMIT HEIGHT 17930 FT (5465 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE ... INFRARED...AND MULTISPECTRAL IMAGERY. THE 000Z UTC FORECAST FROM THE AVIATION MODEL. MEXICO CITY MWO. . ERUPTION DETAILS: ERUPTION AT 04/1755 UTC . DETAILS OF ASH CLOUD: THE FIRST VISIBLE AND INFRARED GOES-8 IMAGERY AFTER THE ERUPTION SHOWS A SMALL ASH PLUME TO THE WEST OF THE VOLCANO. THE MEXICO CITY MWO RECEIVED AN AIRCRAFT REPORT OF AN ERUPTION TO FL330 WHICH WAS CONFIRMED BY BOTH PUEBLA AND A SECOND AIRCRAFT REPORT. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ASH FROM THE SUMMIT TO FL250 WOULD MOVE WEST AT UP TO 15 KTS. ABOVE FL300 WOULD MOVE SOUTH TO SOUTHEAST AT UP TO 15 KTS. WINDS BETWEEN FL250 AND FL300 ARE LIGHT AND VARIABLE. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT STATEMENT WILL BE ISSUED BY 05/0030 OR SOONER IF ADDITIONAL INFORMATION BECOMES AVAILABLE. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER 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. . NNNN