FVXX22 KWBC 222300 VOLCANIC ASH ADVISORY STATEMENT--CORRECTED FOR DATE ISSUED 2300 UTC 22 DEC 1999 BY THE WASHINGTON VAAC . MASAYA 99-004 NICARAGUA 11.98N 86.16W . BACKGROUND: MASAYA NICARAGUA (1404-10) SUMMIT HEIGHT 2083 FT (635 M) . SOURCES OF INFORMATION: GOES-8 VISIBLE INFRARED AND MULTISPECTRAL SATELLITE IMAGERY...1200 UTC AVIATION MODEL WIND FORECAST . ERUPTION DETAILS: STEADY EMISSION OF ASH. . DETAILS OF ASH CLOUD: ASH CAN NO LONGER BE SEEN IN SATELLITE IMAGERY THROUGH 2215 UTC. . TRAJECTORY: UPPER AIR PATTERNS SUGGEST THAT ANY ASH BETWEEN FL040 AND FL100 WOULD MOVE TOWARDS THE WEST SOUTHWEST AT 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 WILL BE THE LAST MESSAGE ON THIS EVENT. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . STREETT/SAB/NOAA/NESDIS . NNNN