Mt. Fitzherbert

Potential ash hazards: Wind forecasts from the National Oceanic and Atmospheric Administration (NOAA), coupled with eruption models, show that any ash clouds that rise above the crater rim today will have trajectories that vary with time and altitude. Early in the day, most clouds would drift west-northwestward to northward. Later in the day, clouds would drift along a north-northwestward to north-northeastward trajectory. Under these conditions, Johnston Ridge, Coldwater, and Highway 504 could all receive fallout from an ash cloud.

Recent observations: Lava extrusion continues at the north end of the new lava dome, while the high spines continue to crumble and other parts of the lava dome move at relatively low velocities (about one foot per day) or remain stagnant. Weather permitting, field crews will make further observations tomorrow.