FVXX20 KWBC 300650 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0650 UTC 30 JULY 1999 BY THE WASHINGTON VAAC . COLIMA 99-046 MEXICO 19.51N 103.62W . BACKGROUND: COLIMA MEXICO (1401-04) SUMMIT HEIGHT 13451 FT (4100M) . SOURCES OF INFORMATION: GOES8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. MEXICO CITY METEOROLOGICAL WATCH OFFICE. MEXICO CITY SIGMET. 30/0000 UTC MEXICO CITY SOUNDING. ERUPTION DETAILS: ERUPTION OCCURRED AT 29/2258 UTC TO FL350. . DETAILS OF ASH CLOUD: NO ASH IS DETECTABLE IN SATELLITE IMAGERY DUE TO MULTI-LAYER METEOROLOGICAL CLOUDS THROUGH 0615 UTC. MULTISPECTRAL IMAGERY AT 0502 UTC DOES INDICATE A POSSIBLE HOT SPOT. TRAJECTORY: SOUTH TO SOUTHWEST AT ABOUT 10-15 KT. . 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 AND VAFTAD. . THE NEXT MESSAGE WILL BE ISSUED BY 30/1300 UTC. . PLEASE REFER TO SIGMETS AND VAFTAD FOR CURRENT WARNINGS. . NNNN