FVXX23 KWBC 180400 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0400 UTC 18 JAN 2000 BY THE WASHINGTON VAAC . SAN CRISTOBAL 00-006 NICARAGUA 1242N 8700W . BACKGROUND: SAN CRISTOBAL NICARAGUA (1404-02) SUMMIT HEIGHT 5725 FT (1745 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. 12 HOUR FORECAST FROM THE 17/1800 UTC AVN MODEL. . ERUPTION DETAILS: POSSIBLE SMALL ERUPTION AT 17/2000 UTC. . DETAILS OF ASH CLOUD: THE FINAL VISIBLE IMAGE AT 17/2345 UTC CONTINUED TO SHOW A PLUME EMANATING FROM SAN CRISTOBAL. THIS PLUME WAS ESTIMATED AT FL060 OR ROUGHLY SUMMIT LEVEL. NO PLUME WAS DETECTED INFRARED AND MULTISPECTRAL IMAGERY THROUGH 18/0315 UTC. HOWEVER SUCH LOW LEVEL PLUMES ARE USUALLY NOT DETECTABLE IN INFRARED AND MULTISPECTRAL IMAGERY AND CAUTION IS URGED. . TRAJECTORY: ASH AT FL060 WOULD MOVE TOWARD THE SOUTHWEST AT 20 TO 30 KTS. . OUTLOOK: SEE LATEST SIGMETS. . NEXT STATEMENT WILL BE ISSUED BY 18/1000 UTC. . 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/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . TURK . NNNN