Activity overnight has again been characterised by rockfalls and pyroclastic flows from the northern part of the dome above Mosquito Ghaut. Pyroclastic flow activity peaked at around 12:30 am this morning. Incandescent ash clouds ('nuee ardentes') were seen from the Southern Observatory which were generated by pyroclastic flows travelling over the Farrell's plain. Activity subsided after this peak but rockfalls continued. The possibility for further pyroclastic flows during the rest of the day remains high.
Currently the wind is blowing toward the west and north-west and there has already been ashfall at the Southern Observatory during the night. It is likely that with further activity there could be more ash blown toward Old Towne and Salem. Currently there is gentle steaming from the dome which is also carrying some ash into the plume.
Pyroclastic flows can now get into the Belham Valley easily and the next collapse may send pyroclastic flows to the Belham Bridge and beyond. Topography suggests that the Belham valley may be quickly filled with deposits allowing flows to impact upon Old Towne and Friths areas and associated surges could get to Salem. With pressurisation of the dome and collapses, the possibilities of explosive events is increased. The southern part of Montserrat is thus extremely dangerous and all areas south of the Nantes River should be evacuated. All residents of Montserrat should be vigilant and listen to Radio Montserrat for further information. Ash masks should be worn when spending any period of time in ashy conditions.