A new explosive eruption has just occured at Redoubt starting at 0741 PM AKDT. Radar indicate a cloud height of at least 60,000 feet above sea level. We will put out more information as it becomes available
A sixth explosive eruption occurred at 7:41PM AKDT. The National Weather Service has posted a new ashfall advisory: pafc.arh.noaa.gov...
Mudflows are occurring in the Drift River valley and pyroclastic flows were observed in the AVO hut webcam descending the north flank of the volcano.
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE ANCHORAGE AK
823 PM AKDT MON MAR 23 2009
INCLUDING THE CITIES OF...TALKEETNA...WILLOW...CANTWELL
823 PM AKDT MON MAR 23 2009
...ASHFALL ADVISORY IN EFFECT UNTIL 5 AM AKDT TUESDAY...
THE NATIONAL WEATHER SERVICE IN ANCHORAGE HAS ISSUED AN ASHFALL
ADVISORY...WHICH IS IN EFFECT UNTIL 5 AM AKDT TUESDAY.
REDOUBT VOLCANO...ON THE WEST SIDE OF COOK INLET...ERUPTED AGAIN
THIS EVENING AT 0741 PM AKDT TO A HEIGHT OF 60,000 FT. MODELS
INDICATE LOW LEVEL LIGHT ASHFALL WILL TRAVEL INTO THE SUSITNA
VALLEY THROUGH TUESDAY MORNING.
AN ASHFALL ADVISORY MEANS THAT ASH WILL BE DEPOSITED IN THE
ADVISORY AREA. PEOPLE IN AREAS OF ASHFALL SHOULD SEAL WINDOWS AND
DOORS. PROTECT ELECTRONICS AND COVER AIR INTAKES AND OPEN WATER
SUPPLIES. MINIMIZE DRIVING. LISTEN TO YOUR RADIO STATION FOR
REDOUBT VOLCANO (CAVW #1103-03-)
60°29'7" N 152°44'38" W, Summit Elevation 10197 ft (3108 m)
Current Aviation Color Code: RED
Current Volcano Alert Level: WARNING
Redoubt remains at Aviation Color Code RED and Alert Level WARNING. Seismic activity at the volcano is currently relatively low, and no activity is observed in partly cloudy web camera images. Pilot reports and satellite images indicate that a steam plume is currently rising to at least 20,000 ft asl and drifting at least 40 miles to the northwest. We have no indication that the volcano is currently emitting ash, though explosive activity could resume with little or no warning.
The last explosive event occurred last night (March 23) at 7:41 pm (AKDT) and lasted for roughly seventeen minutes. The top of the ash cloud was estimated to have reached at least 50,000 ft above sea level based on National Weather Service radar. Winds in the vicinity of the volcano carried the ash cloud primarily to the west and north. Pyroclastic flows were visible traveling down the volcano's north flank in web camera images. Last night's explosive event was the sixth thus far since explosive activity began Sunday, March 22 at 10:38 PM AKDT.
Yesterday, AVO staff visited the area around Redoubt by helicopter to assess conditions and repair equipment damaged by Sunday night's eruptions. They fixed the telemetry link at AVO's observation hut, which is once again transmitting images from the web camera and data from a GPS and two seismic instruments. Clouds obscured the summit, but observers reported very large lahar and flood deposits in the Drift River Valley that likely occurred during and/or following the first five explosions. These flows, which contained ice, water, mud, and other debris, inundated the Drift River Valley and traveled more than 35 km, reaching Cook Inlet. In the middle to upper Drift River Valley, high-water marks reached 6-8 meters above the valley floor. At the AVO hut (roughly 7 miles NNW of the summit), a 6-cm thick fall deposit was observed.
A gas-measurement flight is currently en route to the volcano.
AVO remains staffed 24 hours per day will issue further information as it becomes available.
For up-to-date Ashfall Advisories and wind trajectories, please refer to the National Weather Service website: pafc.arh.noaa.gov...