FVXX21 KWBC 311745 . VOLCANIC ASH ADVISORY STATEMENT-WATCH ISSUED 1745 UTC 31 MAY 1999 BY THE WASHINGTON VAAC . FUEGO 99-008 GUATEMALA 14.47N 90.88W . BACKGROUND: FUEGO GUATEMALA (1402-09) SUMMIT HEIGHT 12345 FT (3763 M) . VOLCANOLOGISTS IN GUATEMALA INDICATE THAT THE VOLCANO REMAINS RESTLESS AND THAT SEISMIC ACTIVITY HAS INCREASED OVER THE LAST FEW DAYS. . THE WATCH VAAS IS ISSUED FOR ONLY SEISMICALLY MONITORED VOLCANOES AND BASED ON INFORMATION RECEIVED FROM THE GEOLOGICAL COMMUNITY. A WATCH VAAS WILL BE ISSUED DAILY WHEN INFORMATION IS RECEIVED TO INDICATE THAT A VOLCANO IS RESTLESS AND HAS THE POTENTIAL FOR AN EXPLOSIVE ERUPTION WITH LITTLE OR NO WARNING. SEE NOAA-ARL HOMEPAGE FOR A TEST VAFTAD AT HTTP://WWW.ARL.NOAA.GOV/VAFTAD.HTML (ALL LOWER CASE) . . THE NEXT WATCH STATEMENT WILL BE ISSUED AROUND 01/1800 UTC. . . NNNN