FVXX23 KWBC 201730
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 1730 UTC 20 FEB 2000 BY THE WASHINGTON VAAC
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SAN CRISTOBAL 00-032   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 OBSERVATION. 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 TIME DELAYED 1600 UTC CHINANDEGA SURFACE
OBSERVATION REPORTED VOLCANIC ASH AS A RESTRICTION TO VISIBILITY.
NO DEFINITIVE ASH PLUME CAN BE SEEN IN SATELLITE IMAGERY THROUGH
20/1645 UTC HOWEVER THERE ARE STREAKS OF LOW LEVEL CLOUDS BEING
FORMED FROM THE MOUNTAINS IN THE AREA AND EXTENDING OUT INTO THE
EASTERN PACIFIC OCEAN.  THE ASH IS ASSUMED TO BE LOW LEVEL ACTIVITY
PROBABLY BELOW FL060. 
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH AT OR BELOW
FL060 WILL MOVE WEST-SOUTHWEST AT 20 TO 30 KNOTS.
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OUTLOOK:  SEE SIGMETS.
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THE NEXT STATEMENT WILL BE ISSUED BY 20/2330 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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