Powerful post frontal bora winds blasted along the Front Range Foothills and across Northeast and East-Central Colorado.  The damaging wind gusts ranged from 60 to 90 mph.  A woman in Louisville died after she was struck by a falling tree branch.  She stopped to rest under a tree when a large branch broke off and struck her in the head.  The winds uprooted trees, shattered windows, sprayed roof shingles, tossed outdoor furniture like toys and knocked over semitrailer trucks. It also blew up dust and debris, limiting visibility for motorists.  The intense winds caused extensive tree damage in and around Washington Park in Denver.  The storm toppled trees onto homes and vehicles.  A 70-foot spruce tree slammed into the roof of a residence and cut through the ceiling of the master bedroom.  A 3-month-old infant was sleeping in the room but uninjured.  Several trees were uprooted and destroyed.  A streetlight came down on an SUV in Denver.
The gusty conditions forced officials to close a number of roadways or place high-wind restrictions.  Around 64,000 Xcel Energy customers experienced some sort of outage related to near-hurricane force winds that toppled trees and power poles.  Service was not restored for approximately 5,000 customers until the following day.  At Denver International Airport, delays occurred as two runways were temporarily shut down and 25 flights were diverted.   Late in the morning, strong winds fanned the flames of a house fire near Castle Rock.  Two homes were destroyed by the fire and 5 others were damaged.  The fire started in the garage of one residence then was fanned by strong winds that spread the fire from one house to the others.
Peak wind reports included:  89 mph in Louisville, 86 mph at Rocky Mountain Metropolitan Airport, 83 mph at the National Wind Technology Center, 81 mph near Eldorado Springs, 79 mph, 4 miles east of Buckeye; 78 mph near Gold Hill and Akron,  74 mph at Cheesman Reservoir, 73 mph, 7 miles east of Ponderosa Park; 72 mph near Longmont; 72 mph near Erie, 71 mph at Bennett, 70 mph at Denver International Airport, 69 mph at Keenesburg, 68 mph at Briggsdale, Limon Municipal Airport, Mead and Sterling; 67 mph near Brighton, Buckley AFB and Strasburg; 66 mph near Hygiene, 64 mph, 9 miles north of Manila Village; 63 mph near Woodlin School,  63 mph at Beverly Hills, 60 mph at Centennial Airport, Front Range Airport, Nunn; 58 mph at Agate.

High Wind in LARIMER & BOULDER COUNTIES BETWEEN 6000 & 9000 FEET, COLORADO
From 17-APR-18 13:35:00 to 17-APR-18 17:00:00 (MST-7)
Magnitude: 70.00 MG
Reported by: Mesonet

High Wind in LARIMER COUNTY BELOW 6000 FEET / NW WELD COUNTY, COLORADO
From 17-APR-18 13:35:00 to 17-APR-18 17:00:00 (MST-7)
Magnitude: 56.00 MG
Reported by: Mesonet

High Wind in BOULDER & JEFFERSON COUNTIES BELOW 6000 FEET / W BROOMFIELD COUNTY, COLORADO
From 17-APR-18 13:00:00 to 17-APR-18 17:00:00 (MST-7)
Magnitude: 89.00 MG
Reported by: Mesonet

High Wind in ELBERT / C & E DOUGLAS COUNTIES ABOVE 6000 FEET, COLORADO
From 17-APR-18 10:00:00 to 17-APR-18 17:00:00 (MST-7)
Magnitude: 63.00 MG
Reported by: Mesonet

High Wind in LARIMER & BOULDER COUNTIES BETWEEN 6000 & 9000 FEET, COLORADO
From 17-APR-18 12:35:00 to 17-APR-18 17:00:00 (MST-7)
Magnitude: 69.00 MG
Reported by: Mesonet

High Wind in JEFFERSON & W DOUGLAS COUNTIES ABOVE 6000 FEET / GILPIN / CLEAR CREEK / NE PARK COUNTIES BELOW 9000 FEET, COLORADO
From 17-APR-18 12:55:00 to 17-APR-18 17:00:00 (MST-7)
Magnitude: 66.00 MG
Reported by: Mesonet

Strong Wind in ELBERT / C & E DOUGLAS COUNTIES ABOVE 6000 FEET, COLORADO
From 17-APR-18 09:00:00 to 17-APR-18 11:00:00 (MST-7)
Magnitude: 30.00 MS
Reported by: Mesonet

Strong winds helped spread a fire that was started in the garage of a residence. Two homes were destroyed by the blaze and 5 others were damaged.

High Wind in NE WELD COUNTY, COLORADO
From 17-APR-18 12:42:00 to 17-APR-18 20:00:00 (MST-7)
Magnitude: 59.00 MG
Reported by: Mesonet

High Wind in C & E ADAMS & ARAPAHOE COUNTIES, COLORADO
From 17-APR-18 14:40:00 to 17-APR-18 20:00:00 (MST-7)
Magnitude: 59.00 MG
Reported by: Mesonet

High Wind in PHILLIPS COUNTY, COLORADO
From 17-APR-18 15:10:00 to 17-APR-18 20:00:00 (MST-7)
Magnitude: 50.00 MG
Reported by: AWOS

High Wind in MORGAN COUNTY, COLORADO
From 17-APR-18 13:02:00 to 17-APR-18 20:00:00 (MST-7)
Magnitude: 59.00 MG
Reported by: Mesonet

High Wind in N DOUGLAS COUNTY BELOW 6000 FEET / DENVER / W ADAMS & ARAPAHOE COUNTIES / E BROOMFIELD COUNTY, COLORADO
From 17-APR-18 13:20:00 to 17-APR-18 17:00:00 (MST-7)
Magnitude: 60.00 MG
Reported by: ASOS

High Wind in C & S WELD COUNTY, COLORADO
From 17-APR-18 13:30:00 to 17-APR-18 20:00:00 (MST-7)
Magnitude: 59.00 MG
Reported by: Mesonet

High Wind in WASHINGTON COUNTY, COLORADO
From 17-APR-18 13:48:00 to 17-APR-18 20:00:00 (MST-7)
Magnitude: 68.00 MG
Reported by: ASOS

High Wind in LOGAN COUNTY, COLORADO
From 17-APR-18 13:50:00 to 17-APR-18 20:00:00 (MST-7)
Magnitude: 63.00 MG
Reported by: Mesonet

High Wind in N & NE ELBERT COUNTY BELOW 6000 FEET / N LINCOLN COUNTY, COLORADO
From 17-APR-18 14:37:00 to 17-APR-18 20:00:00 (MST-7)
Magnitude: 59.00 MG
Reported by: Mesonet

High Wind in ELBERT / C & E DOUGLAS COUNTIES ABOVE 6000 FEET, COLORADO
From 17-APR-18 13:00:00 to 17-APR-18 17:00:00 (MST-7)
Magnitude: 62.00 MG
Reported by: Mesonet