FVXX20 KWBC 111945 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1945 UTC 11 JULY 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-173 WEST INDIES 16.7N 62.2W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY REPORT ERUPTION DETAILS: ERUPTION OCCURRED AT ABOUT 11/1920 UTC. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTS AN ERUPTION PRODUCING ASH THAT THEY ESTIMATE TO BE AT FL080 AND MOVING WESTWARD. SATELLITE IMAGERY SHOWING THE ERUPTION IS NOT YET AVAILABLE. . TRAJECTORY: ASH BELIEVED TO BE MOVING WEST. . 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 AS SOON AS SATELLITE IMAGERY IS AVAILABLE. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN