FVXX22 KWBC 050800 VOLCANIC ASH ADVISORY STATEMENT ISSUED 0800 UTC 05 DEC 1999 BY THE WASHINGTON VAAC . SAN CRISTOBAL 99-015 NICARAGUA 12.7N 87.0W . BACKGROUND: SAN CRISTOBAL NICARAGUA (1404-02) SUMMIT HEIGHT 5725 FT (1745 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE..INFRARED AND MULTISPECTRAL IMAGERY. 04/1200 UTC AVIATION MODEL UPPER-AIR SOUNDING DATA. . ERUPTION DETAILS: CHINANDEGA NICARAGUA METAR REPORT INDICATED MODERATE ACTIVITY AT 0000 UTC. . DETAILS OF ASH CLOUD: MID AND HIGH LEVEL CLOUDS PRECLUDED THE DETECTION OF ASH IN SATELLITE IMAGERY THROUGH 05/0715 UTC. NO ADDITIONAL REPORTS HAVE BEEN RECEIVED. . TRAJECTORY: ANY REMAINING ASH SUMMIT HEIGHT TO FL240 WOULD MOVE TOWARDS THE WEST BETWEEN 10 AND 20 KNOTS. . 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/) . OUTLOOK: SEE LATEST SIGMETS. . EFFECTIVE JANUARY 3 2000 AT 0000 UTC... ALL REFERENCES TO LATITUDE AND LONGITUDE IN VOLCANIC ASH ADVISORY STATEMENTS WILL BE IN DEGREES AND MINUTES OF A DEGREE. EXAMPLE: 16.70N 62.20W WILL BE 1642N6212W . THIS IS THE LAST MESSAGE ON THIS EVENT. PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN