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08:35: Steam plume rising above Redoubt to between 18,000 and 20,000 feet and drifting slightly ENE.
10:09: Onset of explosive event, lasts 21 minutes at SPU. Plume to 12+km; ash to E-SE; moderate flooding event; open vent.
10:13: Pilot report of plume to 30,000 feet.
10:25: Pilot report of plume above 33,000; plume is visible from Anchorage and Kenai.
10:28: New plume visible and appears to be rising above earlier cloud.
11:00: Pilot report of plume to 45,000 feet, westerly winds 30 to 40 knots between 10,000 and 37,000 feet; lightning discharges observed by pilot.
11:04: Seismicity returns to level prior to eruptive event.
11:18: Pilot report of heavy concentration of ash in the plume downwind of Redoubt between 30,000 and 40,000 feet.
12:03: Ashfall at Kenai.
12:55: Dark cloud and ash fall reported over Sterling and Soldotna.
13:01: Pilot report of east edge of ash cloud over Harding Icefield, 105 miles SE of Redoubt.