FVXX20 KNES 190553 VA ADVISORY DTG: 20091219/0553Z VAAC: WASHINGTON VOLCANO: SOUFRIERE HILLS 1600-05 PSN: N1642 W06210 AREA: W_INDIES SUMMIT ELEV: 3002 FT (915 M) ADVISORY NR: 2009/338 INFO SOURCE: GOES-12. NAM WINDS. MONTSERRAT OBSERVATORY. ERUPTION DETAILS: ONGOING ROCKFALLS AND VENTING OF GASES AND ASH OBS VA DTG: 19/0515Z OBS VA CLD: VA NOT IDENTIFIABLE FROM SATELLITE DATA WINDS SFC/FL050 135/15KT FCST VA CLD +6HR: 19/1130Z FCST VA CLD +12HR: 19/1730Z FCST VA CLD +18HR: 19/2330Z RMK: DUE TO CLOUDS... DARKNESS AND THE LOW LEVEL NATURE OF THE PLUME NO VA CAN BE DETECTED IN NIGHTTIME SATELLITE IMAGERY. WINDS ARE FCST TO MOVE ANY ASH NW OVERNIGHT. ...SWANSON NXT ADVISORY: WILL BE ISSUED BY 20091219/1200Z NNNN