FVXX20 KWBC 131545 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1545 UTC 13 JULY 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-176 WEST INDIES 16.7N 62.2W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY (MVO)... GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY... 1200 UTC GUADELOUPE SOUNDING. ERUPTION DETAILS: ERUPTION OCCURRED AT ABOUT 13/1530 UTC. . DETAILS OF ASH CLOUD: CONSIDERABLE CLOUD COVER IS PRESENT OVER THE AREA... AND ASH IS NOT DISCERNABLE AT THIS TIME. MVO REPORTS ASH UP TO FL100. . TRAJECTORY: 1200 UTC GUADELOUPE SOUNDING INDICATES ASH WILL MOVE WEST BETWEEN 20-30 KTS. . 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. . THE NEXT MESSAGE WILL BE ISSUED EITHER AS MORE INFORMATION COMES AVAILABLE OR BY 13/2300 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN