FVXX20 KWBC 301840
.
VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 1840 UTC 30 APR 1999 BY THE WASHINGTON VAAC
.
SOUFRIERE HILLS 99-122   WEST INDIES 16.72N 62.18W
.
BACKGROUND:    SOUFRIERE HILLS MONTSERRAT (1600-05)
               SUMMIT HEIGHT 3000 FT (915 M)
.
SOURCES OF INFORMATION: PILOT REPORT...MONTSERRAT VOLCANO
OBSERVATORY...VISBLE GOES 8 IMAGERY...GUADELOUPE UPPER-AIR SOUNDING
.
ERUPTION DETAILS: ASH VENTING EVENT AROUND 30/1732 UTC.
.
DETAILS OF ASH CLOUD: THROUGH 1745 UTC GOES-8 VISIBLE IMAGE SHOWS
ASH LEAVING THE ISLAND AND MOVING OFF TO THE NORTHWEST. IN ADDITION
THERE IS A SMALL CLOUD PUSHING SLOWLY TO THE SOUTHWEST OF THE
ISLAND. ASH EXTENDS FROM THE SUMMIT TO 16.9N 62.3W AT FL050 AND IS
15 KM WIDE. ASH ALSO EXTENDS FROM THE SUMMIT TO 16.6N 62.3W ABOVE
FL050 TO FL100 AND IS 10 KM WIDE. A PILOT REPORT AT 1739 UTC 
INDICATED ASH TO FL100. GOES-8 VISIBLE SATELLITE IMAGERY COMBINED
WITH AN UPPER-AIR ANALYSIS INDICATES THAT THIS IS THE VERTICAL
EXTENT OF THE ASH.
. 
TRAJECTORY: FROM SURFACE TO FL050 TOWARD THE NORTHWEST AT 15 TO 20
KNOTS. FROM FL050 TO FL100 TOWARD THE SOUTHWEST AT 5 TO 10 KNOTS.
.
THIS AND OTHER VOLCANIC ASH ADVISORY STATEMENTS OFTEN ACCOMPANIED BY
A MAP DEPICTING ASH LOCATION ARE AVAILABLE AT INTERNET URL ADDRESS
www.ssd.noaa.gov/VAAC/messages.html
(all lower case except /VAAC/)
.
OUTLOOK: SEE SIGMETS.
.
THE NEXT MESSAGE WILL BE ISSUED AT 01/0030 UTC.
.
PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
.
NNNN

"Attached Graphic Map Depicting Ash" 

"Graphic Map Depicting Ash"