FVXX22 KWBC 071820
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VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1820 UTC 07 JULY 1999 BY THE WASHINGTON VAAC 
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SOUFRIERE HILLS 99-168    WEST INDIES 16.7N 62.2W  
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BACKGROUND:    SOUFRIERE HILLS MONTSERRAT (1600-05)
               SUMMIT HEIGHT 3000FT (915M)
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SOURCES OF INFORMATION: MONTSERRAT VOLCANO OBSERVATORY (MVO)..GOES-8
VISIBLE AND INFRARED IMAGERY..1200 UTC GUADALOUPE
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ERUPTION DETAILS: MONTSERRAT VOLCANO OBSERVATORY REPORTS A DOME
COLLAPSE OF THE SOUFRIERE HILLS VOLCANO AT 1755 UTC.
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DETAILS OF ASH CLOUD: THE INITIAL HEIGHT ESTIMATE OF THE ASH FROM
THE MVO IS TO FL070 TO FL080 BUT IT MAY STILL BE RISING. ANY ASH
FROM THE ERUPTION IS NOT SEEN IN SATELLITE IMAGERY AT THIS TIME. 
HOWEVER SKIES ARE CLEAR AND WE EXPECT TO BE ABLE TO DISCERN AN ASH
PLUME IN SUBSEQUENT IMAGERY.
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TRAJECTORY: UPPER AIR DATA SUGGEST THAT ASH FROM FL050 TO FL100
WOULD MOVE TOWARD THE WEST AT 20 TO 25 KTS. 
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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/)
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OUTLOOK:  SEE SIGMETS.
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THE NEXT MESSAGE WILL BE ISSUED BY 1930 UTC.
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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