FVXX20 KWBC 191610
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VOLCANIC ASH ADVISORY STATEMENT 
ISSUED 1610 UTC 19 APR 1999 BY THE WASHINGTON VAAC
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SOUFRIERE HILLS 99-115   WEST INDIES 16.72N 62.18W
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BACKGROUND:    SOUFRIERE HILLS MONTSERRAT (1600-05)
               SUMMIT HEIGHT 3000 FT (915 M)
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SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY. GOES-8
VISIBLE AND MULTISPECTRAL IMAGERY. GOES-8 SATELLITE DERIVED HIGH
DENSITY WINDS. 1200 UTC GUADELOUPE SOUNDING.
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ERUPTION DETAILS: ASH VENTING APPROX 0838 UTC.
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DETAILS OF ASH CLOUD: GOES-8 VISIBLE SATELLITE IMAGERY AT 1530 UTC
SHOWS AN AREA OF THIN ASH BOUNDED BY 16.4N63.5W 16.0N63.7W
16.3N64.4W 16.7N64.8W 17.2N64.8W 17.1N64.5W AND 16.7N64.3W. THIS ASH
IS ESTIMATED BELOW FL200 BASED ON THE 1200 UTC SOUNDING FROM
GUADELOUPE.
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST ASH BETWEEN FL100 AND FL200
WOULD MOVE TOWARD THE SOUTHWEST AT 20 TO 30 KNOTS. ASH BELOW FL100
WOULD MOVE WEST AT 10 TO 20 KNOTS.
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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/)
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OUTLOOK: SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 19/2200 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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NNNN

"Attached Graphic Map Depicting Ash" 

"Graphic Map Depicting Ash"