FVXX20 KWBC 182025 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 2025 UTC 18 JULY 1999 BY THE WASHINGTON VAAC . COLIMA 99-044 MEXICO 19.51N 103.62W . BACKGROUND: COLIMA MEXICO (1401-04) SUMMIT HEIGHT 13451 FT (4100 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY THROUGH 18/2000 UTC. MEXICO CITY METEOROLOGICAL WATCH OFFICE COORDINATION. MEXICO CITY SIGMET. 1200 UTC MANZANILLO RADIOSONDE. ERUPTION DETAILS: ERUPTION OCCURRED AT ABOUT 17/1742 UTC. SMALLER EXHALATIONS OCCURRED ON THE MORNING OF JULY 18. . DETAILS OF ASH CLOUD: NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 2000 UTC. HOWEVER THUNDERSTORMS OVER THE VOLCANO AND WEST OF THE VOLCANO COULD PREVENT SATELLITE DETECTION OF ASH IN THESE AREAS. THE MEXICO CITY METEOROLOGICAL WATCH OFFICE HAS CANCELED ITS SIGMET FOR THIS EVENT. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH THAT MIGHT BE PRESENT BELOW FL280 WOULD MOVE TO THE WEST OR SOUTHWEST AT LESS THAN 15 KNOTS. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS OFTEN ACCOMPANIED BY A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE LATEST SIGMETS. . THIS WILL BE THE LAST STATEMENT ON THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN