Longmont was among the most-battered areas of Boulder County by powerful gusts that reached as high as 80 mph Tuesday afternoon, downing power lines and trees that caused thousands to lose electricity, multiple roadblocks and damage to at least one home.
Starting at about 1:50 p.m., power outages occurred in Longmont, Boulder, Lafayette, Louisville, Niwot and Broomfield, on a day where the National Weather Service declared a Red Flag Warning.
"This is the worst (the wind) has been in a long time," Longmont resident Jane Marcus said.
In Longmont, 1,300 residents were without power in an area formed by Harvard Street, 17th Avenue, Mountain View Avenue and Airport Road, said Longmont Power and Communications spokesman Scott Rochat.
Power was back online in that area by 2:07 p.m., he said, but another outage occurred shortly after, affecting 800 customers in an area bordered by South Hover Street, the Burlington Northern railroad tracks, South Sunset Street and Creekside Drive.
High winds caused both lapses. All major outages in Longmont had been fixed by 3:45 p.m., but smaller-scale outages continued into the evening.
Residents experiencing electricity issues are asked to call Longmont Power and Communications at 303-776-0011 or 303-651-8386.
Power also went out in the Longmont Civic Center for about 30 minutes.
An emergency power outage at the Williams Village Power Plant briefly left all buildings in Williams Village without heat and hot water, the University of Colorado's Housing and Dining Twitter account announced.
The city of Lafayette said on Twitter the front entrance glass doors at its public library shattered due to wind, and the building was closed for Tuesday afternoon, but is expected to reopen at 10 a.m. Wednesday.
Lafayette police said on Twitter at 3 p.m. that downed trees were blocking Baseline Road near Gough Avenue, South Boulder Road near Centaurus High School and Arapahoe Avenue near Yarrow Street.
Louisville closed its Recreation and Senior Center at 3:15 p.m. due to wind, canceling scheduled swim lessons and youth sports programs.
The largest power outage appeared to strike in Broomfield, where about 4,400 customers lost power near the Broomfield Industrial Park off of U.S. 36, as well as thousands more in outages along West 120th Avenue, according to an Xcel Energy outage tracker.
Wind also caused a semi to roll over on northbound Interstate 25, closing the exit ramp to Colo. 7, and a trampoline blew onto Sheridan Boulevard near 136th Avenue.
The driver of the semi was uninjured, North Metro Fire said on Twitter.
"Help us get the word out that any semis traveling with empty trailers need to seek shelter. They are no match against these winds. There are reports of rolled over semis all along I-25 in multiple fire districts," North Metro Fire said.
The North Metro Fire Station at 10550 Huron St. also sustained damage to its roofing in the winds. Materials from the roof blew into and tarnished employee vehicles.
There were numerous small fires reported throughout the county, but none were serious. Firefighters in Hygiene had to extinguish a controlled burn in the 6500 block of Hygiene Road that grew too large in the wind at about 12:45 p.m., Boulder County emergency dispatchers said.
The National Weather Service on Twitter reported an 83 mph gust was recorded on Colo. 93, with an 81 mph measurement in Boulder at the National Center for Atmospheric Research lab.
A large pine tree fell, and from across Grant Street, crushed the front porch of the home at 1246 Longs Peak Drive in Longmont.
Brett Koth, a neighbor of the damaged home, estimated the tree to be at least 90 years old. He said Longmont forestry department officials inspected the tree and had planned to cut it down this week.
Another tree measuring about 50 feet fell across Pratt Street near Fourth Avenue, causing traffic delays, but Nicolas Wallace, who lives on the property where the tree fell, didn't hear the noise because he was wearing headphones at the time.
The tree narrowly missed striking Wallace's car, as well his uncle's month-old vehicle.
Bob Marcus heard the tree crashing from across the street.
"Do you know what someone hitting cement with a sledgehammer sounds like?" he asked, adding the volume wasn't extreme, but "solid."
Another tree fell on Oskar Blues Brewery property and landed partially on Burlington Northern Santa Fe railway tracks. A cleanup crew was seen starting to clear the tracks at about 5 p.m.
Former Boulder Councilwoman Jan Burton said on Twitter that her neighbor's car on University Hill was pounded by a massive pine.
Staff writer Madeline St. Amour contributed to this report.
Sam Lounsberry: 303-473-1322, email@example.com and twitter.com/samlounz.