FVXX22 KWBC 010430
VOLCANIC ASH ADVISORY STATEMENT
ISSUED 0430 UTC 01 FEB 2000 BY THE WASHINGTON VAAC 
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SAN CRISTOBAL 00-018   NICARAGUA  1242N 8700W 
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BACKGROUND:    SAN CRISTOBAL NICARAGUA (1404-02)
               SUMMIT HEIGHT 5725 FT (1745M)
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SOURCES OF INFORMATION: GOES-8 INFRARED AND MULTISPECTRAL IMAGERY. 
SURFACE OBSERVATIONS FROM CHINANDEGA AT 1600UTC 2100UTC AND 2200UTC.
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ERUPTION DETAILS: OCCASIONAL LIGHT ASH AND STEAM EMISSIONS.
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DETAILS OF ASH CLOUD: NO ASH CAN BE SEEN IN SATELLITE IMAGERY
THROUGH 0345 UTC.  HOWEVER SATELLITE DETECTION OF SMALL AMOUNTS OF
LOW LEVEL ASH CAN BE DIFFICULT OR IMPOSSIBLE AT NIGHT.
   ON THE AFTERNOON OF JANUARY 31 ASH TO FL060 WAS OBSERVED IN
SATELLITE IMAGERY MOVING TO THE WEST AND A 1600 UTC OBSERVATION FROM
CHINANDEGA ALSO INDICATED ASH.  THE 2100 UTC AND 2200 UTC CHINANDEGA
OBSERVATIONS DID NOT MENTION ASH.
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TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH UP TO FL060
WOULD MOVE TO THE WEST OR WEST SOUTHWEST AT 15 TO 20 KNOTS.
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OUTLOOK:  SEE LATEST SIGMETS.
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THIS WILL BE THE LAST STATEMENT ON THIS EVENT UNLESS NEW INFORMATION
IS RECEIVED.
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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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