FVXX22 KWBC 230230 VOLCANIC ASH ADVISORY ISSUED 0230 UTC 23 AUG 2000 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 00-167 WEST INDIES 1643N 6211W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY. GOES-8 ...INFRARED...AND MULTISPECTRAL IMAGERY. 23/0000 UTC GUADELOUPE UPPER AIR SOUNDING . ERUPTION DETAILS: ROCKFALLS PROBABLY PRODUCING CONTINUOUS ASH DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTS THAT ROCKFALLS HAVE CONTINUED THROUGHOUT THE DAY PROBABLY PRODUCING ASH AT OR BELOW FL100. THERE IS NO DETECTABLE ASH IN GOES-8 IMAGERY THROUGH 23/0145 UTC ALTHOUGH THERE ARE EXTENSIVE METEOROLOGICAL CLOUDS ASSOCIATED WITH HURRICANE DEBBY IN THE AREA. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST ANY ASH BELOW FL100 TO MOVE BETWEEN WEST-NORTHWEST AND NORTHWEST AT BETWEEN 20 TO 30 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 23/0830 UTC. . REAL TIME SATELLITE IMAGERY AND VOLCANIC ASH ADVISORIES 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/). . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN