Observatory personnel said clouds obscured their view of the volcano Tuesday.
Scientists planned to fly by the volcano later this week, if the weather improves, to measure three chemical compounds linked to volcanic activity: sulfur dioxide, carbon dioxide and hydrogen sulfide.
Redoubt has erupted several times since the 1960s. Its most recent major activity was last winter and spring, including 19 significant eruptions over several weeks that sent ash plumes as high as 65,000 feet and cloaked parts of Southcentral Alaska in up to a half-inch of ash.
Residents donned face masks and covered their cars and trucks to keep the ash off the finish and out of the engines.
One eruption caused a mudflow that partially flooded the Drift River Oil Terminal near the mountain's base.
The volcanic eruptions also caused hundreds of flights to be diverted from Anchorage.
-- Anchorage Daily News/adn.com
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