FVXX22 KWBC 200730 VOLCANIC ASH ADVISORY ISSUED 0730 UTC 20 AUG 2000 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 00-155 WEST INDIES 1643N 6211W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. GUADELOUPE UPPER AIR SOUNDING. 6 HOUR WIND FORECAST FROM THE 20/0000 UTC AVIATION MODEL. . ERUPTION DETAILS: ROCKFALLS AND SMALL PYROCLASTIC FLOWS. . DETAILS OF ASH CLOUD: ASH IS NOT SEEN IN THE SATELLITE THROUGH 20/0715 UTC. HOWEVER A FAIRLY CONTINUOUS HOT SPOT CAN BE SEEN IN MULTISPECTRAL IMAGERY. . TRAJECTORY: ANY ASH UP TO FL070 WILL MOVE TOWARDS THE WEST-WEST-NORTHWEST AT 10-15 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT MESSAGE WILL BE ISSUED BY 20/1330 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. . WALTER . NNNN