FVXX21 KWBC 201015 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 1015 UTC 20 JULY 1999 BY THE WASHINGTON VAAC . FUEGO 99-021 GUATEMALA 14.47N 90.88W . BACKGROUND: FUEGO GUATEMALA (1402-09) SUMMIT HEIGHT 12345 FT (3763 M) . SOURCES OF INFORMATION: GUATEMALA VOLCANO OBSERVATORY...GOES 8 INFRARED AND MULTISPECTRAL IMAGERY...U.S. NATIONAL WEATHER SERVICE NUMERICAL WEATHER MODELS ERUPTION DETAILS: SMALL EMISSIONS OF ASH. . DETAILS OF ASH CLOUD: THE GUATEMALA VOLCANO OBSERVATORY CONTINUES TO CLASSIFY THE FUEGO VOLCANO AS A CODE ALERT ORANGE. DENSE METEOROLOGICAL CLOUD COVER MAKES IT IMPOSSIBLE TO DISCERN ASH. REPORTS OF ASH LATE YESTERDAY SUGGESTED THAT THE ASH WAS BELOW FL150. . TRAJECTORY: NUMERICAL MODEL DATA SUGGESTS THAT ANY ASH AT ABOUT FL150 WOULD MOVE TO THE WEST OR WEST SOUTHWEST AT LESS THAN 10 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. . THE NEXT STATEMENT WILL BE ISSUED BY 20/1615 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN