FVXX20 KWBC 112030
.
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2030 UTC 11 JULY 1999 BY THE WASHINGTON VAAC 
.
SOUFRIERE HILLS 99-174    WEST INDIES 16.7N 62.2W  
.
BACKGROUND:    SOUFRIERE HILLS MONTSERRAT (1600-05)
               SUMMIT HEIGHT 3000 FT (915M)
.
SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY REPORT... 
GOES-8 VISIBLE INFRARED AND MULTISPECTRAL IMAGERY...1200 UTC
GUADELOUPE SOUNDING...

ERUPTION DETAILS:  ERUPTION OCCURRED AT ABOUT 11/1920 UTC. 
.
DETAILS OF ASH CLOUD: THE MONTSERRAT VOLCANO OBSERVATORY REPORTS AN
ERUPTION PRODUCING WESTWARD MOVING ASH.  SATELLITE IMAGERY THROUGH
2002 UTC SHOWS AN ASH PLUME EXTENDING FROM THE SUMMIT TO THE POINT
16.8N 62.5W.  AT THAT TIME THE PLUME WAS 16 KM (7 NMI) WIDE. ASH IS
ESTIMATED TO BE AT ABOUT FL080.
.
TRAJECTORY: ASH IS MOVING WEST NORTHWEST AT ABOUT 8 KNOTS.
.
REAL TIME SATELLITE IMAGERY ALONG WITH 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/washington.html
(all lower case except /VAAC/)
.
OUTLOOK:  SEE LATEST SIGMETS.
.
THE NEXT MESSAGE WILL BE ISSUED BY 12/0230 UTC.         
.
PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
.
NNNN
"Attached Graphic Map Depicting Ash" 

""