FVXX20 KWBC 311835 VOLCANIC ASH ADVISORY ISSUED: 2001JUL31/1835Z VAAC: WASHINGTON . VOLCANO: SOUFRIERE HILLS 1600-05 LOCATION: 1643N 6211W AREA: CARIBBEAN . SUMMIT ELEVATION: 3000 FT (915 M) . ADVISORY NUMBER: 2001/196 . INFORMATION SOURCE: GOES-8 VISIBLE...INFRARED AND MULTISPECTRAL IMAGERY. 31/1200Z UPPER AIR OBSERVATIONS FROM LE RAIZET AND JULIANA AIRPORT. 1725Z PILOT REPORT. . ERUPTION DETAILS: ASH ACTIVITY HAS DECREASED. . DETAILS OF ASH CLOUD: NO ASH IS DETECTED IN THE LATEST VISIBLE IMAGERY AT 1745Z...HOWEVER...A PILOT REPORT AT 1725Z INDICATED LIGHT TO MODERATE VOLCANIC ASH TOPS APPROXIMATELY FL085 MOVING NW FROM MONTSERRAT. . ***AVIATORS PLEASE CONTACT SAN JUAN AIRPORT FOR AIRPORT OPERATIONS STATUS*** . TRAJECTORY: ANY ASH BETWEEN FL150 AND FL200 WOULD MOVE SOUTHWEST AT 5 KNOTS. ASH BELOW FL100 WOULD MOVE WEST AT 5 TO 10 KNOTS. . OUTLOOK: SEE SIGMETS AND VAFTAD. . THE NEXT ADVISORY WILL BE ISSUED BY 01/0030Z. . 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