FVXX21 KWBC 201841
VOLCANIC ASH ADVISORY
ISSUED: 2003APR20/1900Z   VAAC: WASHINGTON

VOLCANO: SOUFRIERE HILLS 1600-05
LOCATION: N1643W06211    AREA: CARIBBEAN
                              
SUMMIT ELEVATION: 3000 FT (915 M) 
                              
ADVISORY NUMBER: 2003/422
 
INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST.
UPPER AIR SOUNDING

ERUPTION DETAILS: CONTINUED EMISSION OF GASES AND ASH.
 
OBS ASH DATE/TIME: 20/1815Z
 
OBS ASH CLOUD: SFC/FL070 N1643W06211 N1704W06205 N1711W06219
N1704W06238 N1643W06211 MOVING N 15-20 KNOTS.

FCST ASH CLOUD +6H: SEE SIGMETS
 
REMARKS:  VISIBLE IMAGERY SHOWS A PLUME OF ASH EXTENDING TO THE
NORTH AND NORTHWEST OF THE VOLCANO. THE ASH IS ESTIMATED AT FL070
AND IS MOVING AT 15-20 KNOTS. THE LEADING EDGE OF THE ASH BECOMES
DIFFICULT TO DETERMINE BECAUSE CLOUDS OBSCURE THE ASH BOUNDARY.  

NEXT ADVISORY: WILL BE ISSUED BY 2003APR21/0100Z

NNNN
"Attached Graphic Map Depicting Ash Only" 

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