FVXX20 KWBC 230630 VOLCANIC ASH ADVISORY ISSUED 0630 UTC 23 NOV 2000 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 00-305 WEST INDIES 1643N 6211W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . INFORMATION SOURCE: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. AVIATION MODEL UPPER AIR WIND FORECAST. . ERUPTION DETAILS: FAINT ASH PLUME IN VISIBLE IMAGERY. . DETAILS OF ASH CLOUD: NO ASH WAS DETECTED IN SATELLITE IMAGERY THROUGH 23/0545 UTC. HOWEVER AN ASH PLUME FROM THE VOLCANO TO THE NORTHWEST ESTIMATED AT OR BELOW FL070 WAS VISIBLE DURING DAYTIME HOURS. SUCH LOW LEVEL ASH IS OFTEN UNDISCERNIBLE IN INFRARED OR MULTISPECTRAL IMAGERY. . TRAJECTORY: ANY ASH FROM SUMMIT LEVEL TO FL070 WOULD MOVE TOWARDS THE NORTHWEST AT 10 TO 15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT ADVISORY WILL BE ISSUED BY 23/1230 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. . CLARK . NNNN