FVXX21 KWBC 200430 . VOLCANIC ASH ADVISORY STATEMENT ISSUED 0430 UTC 20 JULY 1999 BY THE WASHINGTON VAAC . FUEGO 99-020 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 HAS RAISED THE FUEGO VOLCANO TO A CODE ALERT ORANGE. ASH IS NOT DISCERNIBLE IN SATELLITE IMAGERY POSSIBLY BECAUSE OF THE EXTENSIVE METEOROLOGICAL CLOUDS IN THE AREA AT THIS TIME. 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 20/1030 UTC. . PLEASE REFER TO SIGMETS FOR CURRENT WARNINGS. . NNNN