FVXX23 KWBC 202330
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 2330 UTC 20 FEB 2000 BY THE WASHINGTON VAAC
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SAN CRISTOBAL 00-033   NICARAGUA  1242N 8700W 
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BACKGROUND:      SAN CRISTOBAL  NICARAGUA  (1404-02)
                 SUMMIT HEIGHT 5725 FT  (1745 M)
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SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL
IMAGERY. CHINANDEGA SURFACE OBSERVATIONS. 12 HOUR WINDS FORECAST
FROM THE AVIATION MODEL. 
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ERUPTION DETAILS: EMISSION OF ASH AND GASES BEGINNING TIME UNKNOWN.
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DETAILS OF ASH CLOUD: THE 20 UTC AND 22 UTC CHINANDEGA SURFACE
OBSERVATIONS REPORTED VOLCANIC ASH AS A RESTRICTION TO VISIBILITY.
NO ASH CAN BE SEEN IN SATELLITE IMAGERY THROUGH 20/2245 UTC EITHER
BECAUSE THE ASH IS LOW LEVEL OR BECAUSE METEOROLOGICAL CLOUDS COVER
MUCH OF THE AREA NEAR THE VOLCANO.  THE ASH IS BELIEVED TO PROBABLY
BE BELOW FL060. 
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH AT ABOUT FL060
WILL MOVE TOWARD THE WEST SOUTHWEST AT APPROXIMATELY 25 KNOTS.
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OUTLOOK:  SEE SIGMETS.
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THE NEXT STATEMENT WILL BE ISSUED BY 21/0530 UTC. 
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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  
http://www.ssd.noaa.gov/VAAC/washington.html
(all lower case except /VAAC/)
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PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS.
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