FVXX23 KWBC 201730 VOLCANIC ASH ADVISORY STATEMENT ISSUED 1730 UTC 20 FEB 2000 BY THE WASHINGTON VAAC . SAN CRISTOBAL 00-032 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. CHINANDEGA SURFACE OBSERVATION. 12 HOUR WINDS FORECAST FROM THE AVIATION MODEL. . ERUPTION DETAILS: EMISSION OF ASH AND GASES BEGINNING TIME UNKNOWN. . 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. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH AT OR BELOW FL060 WILL MOVE WEST-SOUTHWEST AT 20 TO 30 KNOTS. . OUTLOOK: SEE SIGMETS. . THE NEXT STATEMENT WILL BE ISSUED BY 20/2330 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 http://www.ssd.noaa.gov/VAAC/washington.html (all lower case except /VAAC/) . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN