FVXX21 KNES 210541 VA ADVISORY DTG: 20080821/0541Z VAAC: WASHINGTON VOLCANO: SANTA MARIA 1402-03 PSN: N1445 W09133 AREA: GUATEMALA SUMMIT ELEV: 12375 FT (3772 M) ADVISORY NR: 2008/020 INFO SOURCE: GOES-13 ERUPTION DETAILS: OBS VA DTG: /Z OBS VA CLD: VA NOT IDENTIFIABLE FROM SATELLITE DATA. FCST VA CLD +6HR: 21/1100Z FCST VA CLD +12HR: 21/1700Z FCST VA CLD +18HR: 21/2300Z RMK: ... NXT ADVISORY: NO FURTHER ADVISORIES NNNN