BOULDER - A 30-foot deep surge spotted in Boulder Canyon around midnight dissipated before it hit the City of Boulder.
A weather spotter reported around 11 p.m. Thursday a large wall of water, containing debris and vehicles, was heading down Emerson Gulch. It was expected to hit the city of Boulder around midnight.
However, the surge apparently flattened out in the wider area of the canyon.
Instead of Boulder Creek spilling over its banks, the flow reduced to below 4,000 cubic feet per second. But authorities warn to still be alert.
Evacuations have been ordered from the mouth of Boulder Canyon to Broadway, Pearl to Marine streets.
City officials say the notice to head to higher ground went out to about 4,000 people.
Boulder County spokesman James Burrus says about 8,000 telephone numbers with the message to evacuate were called, but officials aren't sure how many individuals that represents.
A notice was sent to all residents of Eldorado Springs shortly after midnight to evacuate immediately due to higher water levels and increased chance of mudslides along South Boulder Creek.
Residents have been asked to evacuate to a barn located at 2875 Boulder County Road 67, just south and east of the town of Eldorado Springs.
(KUSA-TV © 2013 Multimedia Holdings Corporation with The Associated Press)