FVXX21 KWBC 301238
VOLCANIC ASH ADVISORY           
ISSUED: 2003APR30/1300Z   VAAC: WASHINGTON

VOLCANO: SOUFRIERE HILLS 1600-05
LOCATION: N1643W06211    AREA: CARIBBEAN
                              
SUMMIT ELEVATION: 3000 FT (915 M) 
                              
ADVISORY NUMBER: 2003/461
 
INFORMATION SOURCE: GOES-12 IMAGERY. GFS MODEL WINDS FORECAST. 
                   
ERUPTION DETAILS: CONTINUED EMISSION OF GASES AND ASH.
 
OBS ASH DATE/TIME: 30/1215Z
 
OBS ASH CLOUD: SFC/FL060 N1643W06211 N1734W06400 N1706W06424
NN1639W06253 N1643W06211 MOVING WEST AT 15 KNOTS.

FCST ASH CLOUD +6H: SEE SIGMETS
 
REMARKS: ASH CAN BE SEEN MOVING IN A FAN PATTERN FROM DUE WEST TO
NNW OF MONTSERRAT.  THE HIGH CIRRUS OVER THE ISLAND OF ST. CROIX
MAKES IT DIFFICULT TO DETERMINE IF ASH IS NEAR THE ISLAND...BUT
WITH CONFIDENCE ASH IS SEEN AT LEAST 40 MILES TO THE SW OF ST.
CROIX. SO ASH MAY BE PRESENT UNDER THE CIRRUS CANOPY TO THE SW OF
ST. CROIX BUT WOULD NOT EXCEED 7000 FT IN ALTITUDE. AS ACTIVITY
HAS BEEN MOSTLY CONSISTING OF ROCKFALLS KICKING UP ASH TO A VERY
LOW LEVEL. A CONSISTENT HOTSPOT HAS BEEN OBSERVED IN THERMAL IR
CHANNEL OF GOES IMAGERY. RECENTLY A THUNDERSTORM HAS DEVELOPED
OVER THE ISLAND OF MONTSERRAT MAKING DETECTION AT THE SUMMIT
IMPOSSIBLE BUT CAN ASSUME WITH GREAT CONFIDENCE THAT ACTIVITY
CONTINUES THERE...GALLINA

NEXT ADVISORY: WILL BE ISSUED BY 2003APR30/1900Z.

NNNN
"Attached Graphic Map Depicting Ash Only" 

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