FVXX23 KWBC 070510 VOLCANIC ASH ADVISORY ISSUED 0510 UTC 07 AUG 2000 BY THE WASHINGTON VAAC . SOUFRIERE HILLS 00-117 WEST INDIES 1643N 6211W . BACKGROUND: SOUFRIERE HILLS MONTSERRAT (1600-05) SUMMIT HEIGHT 3000 FT (915M) . SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. MONTSERRAT VOLCANO OBSERVATORY. 07/0000 UTC GUADELOUPE UPPER AIR SOUNDING ERUPTION DETAILS: ERUPTION..PYROCLASTIC FLOW AROUND 07/0445 UTC. . DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY HAS REPORTED A PYROCLASTIC FLOW AROUND 07/0445 UTC WHICH PRODUCED ASH ESTIMATED TO BE BELOW FL100. THE ASH WAS REPORTED TO BE MOVING TO THE NORTHWEST. SATELLITE IMAGERY AT 07/0445 UTC INDICATED A HOT SPOT OVER THE VOLCANO BUT NO ASH WAS DETECTED IN THIS LATEST IMAGE. BECAUSE THE REPORTED TIME OF THE ERUPTION MATCHES THE LATEST IMAGE TIME THE SUBSEQUENT IMAGES WILL BE ANALYZED FOR ASH. IF ASH IS DETECTED ON IMAGERY AN UPDATE MESSAGE WILL BE SENT AS SOON AS POSSIBLE. . TRAJECTORY: ANY ASH FROM THE SUMMIT TO FL100 WILL MOVE TOWARDS THE NORTHWEST AT 15 TO 20 KNOTS. OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 07/1100 UTC. . REAL TIME SATELLITE IMAGERY ALONG WITH THIS AND OTHER 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