FVXX20 KWBC 201400 . VOLCANIC ASH ADVISORY STATEMENT-WATCH ISSUED 1400 UTC 20 FEB 1999 BY THE WASHINGTON VAAC . COLIMA 99-012 MEXICO 19.51N 103.62W . BACKGROUND: COLIMA MEXICO (1401-04) SUMMIT HEIGHT 13451 FT (4100 M) SOURCES OF INFORMATION: GOES8 VISIBLE INFRARED SHORTWAVE AND MULTISPECTRAL IMAGERY. ERUPTION DETAILS: POSSIBLE NEAR SUMMIT ACTIVITY DETAILS OF ASH CLOUD: GOES8 SATELLITE IMAGERY THROUGH 1345 UTC DOES NOT SHOW ANY ASH CLOUD ALTHOUGH A HOT SPOT IS OCCASIONALLY SEEN IN SHORTWAVE IMAGERY. THE MEXICO CITY MWO HAS CANCELED THEIR SIGMET AND COLIMA SURFACE OBSERVATIONS HAVE NOT REPORTED ANY ERUPTIVE ACTIVITY RECENTLY. WE ARE ENDING THIS EVENT AND PLACING THE VOLCANO IN A WATCH STATUS. THE COLIMA VOLCANO OBSERVATORY REPORTS THAT THE VOLCANO REMAINS UNSTABLE WITH THE POTENTIAL TO PRODUCE AN ERUPTION CLOUD WITH LITTLE OR NO WARNING. . WE WILL CONTINUE TO MONITOR THE AREA AND IF THERE IS AN ASH CLOUD OBSERVED OR REPORTED AT ANY ALTITUDE A VOLCANIC ASH ADVISORY STATEMENT WARNING WILL BE ISSUED AS SOON AS POSSIBLE. . THE WATCH VAAS IS ISSUED ONLY FOR 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. NON-EXPLOSIVE LOW LEVEL AND NEAR SUMMIT ACTIVITY MAY BE OCCURRING AT PRESENT. SEE NOAA-ARL HOMEPAGE FOR TEST-VAFTAD AT: HTTP://WWW.ARL.NOAA.GOV/VAFTAD.HTML (ALL LOWER CASE) . THE NEXT WATCH STATEMENT WILL BE ISSUED AROUND 21/1400 UTC. . NNNN