FVXX22 KWBC 241630 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1630 UTC 24 OCTOBER 1999 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 99-235 WEST INDIES 16.72N 62.18W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY...GOES-8 INFRARED AND MULTISPECTRAL IMAGERY...12 UTC UPPER-AIR SOUNDING FROM GUADELOUPE. . ERUPTION DETAILS: ERUPTION OCCURRED AT 24/1615 UTC. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY HAS REPORTED A SMALL TO MODERATE ERUPTION OF THE SOUFRIERE HILLS VOLCANO. INDICATIONS ARE THAT STEAM AND ASH ARE REACHING FL150. SATELLITE IMAGERY IS NOT YET AVAILABLE THROUGH 1615 UTC. . TRAJECTORY: ASH AND STEAM BELOW FL050 IS EXPECTED TO MOVE TO THE NORTH AND NORTHWEST AT 5 TO 10 KNOTS. HOWEVER ASH AND STEAM BETWEEN FL050 AND FL150 SHOULD MOVE TO THE NORTHEAST AT THE SAME SPEED. . 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 http://www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 24/2230 UTC. HOWEVER IF SATELLITE IMAGERY INDICATES AN ASH CLOUD THEN A NEW STATEMENT WILL BE RELEASED ALONG WITH A GRAPHIC MUCH SOONER. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . ORRISON . NNNN