DENVER (KDVR) — A dangerous cold front is moving into the state on Wednesday. A Pinpoint Weather Alert Day has been issued for Wednesday, Thursday and Friday with subzero high temperatures and wind chills of 50 degrees below zero.

Temperatures will begin to plummet on Wednesday evening as the arctic cold front arrived. The Pinpoint Weather team followed the storm’s arrival. This story is no longer being updated on Wednesday night.

Live updates: Arctic cold front arrives in Colorado

10:21 p.m. Denver International Airport has seen 156 cancellations and 721 delays, according to FlightAware.

9:34 p.m. U.S. 85 northbound is closed between County Road 80 and the Wyoming border.

9:15 p.m. Shuttles were halted between Boulder Shelter for the Homeless and the East Boulder Community Center because of poor road conditions. Boulder Office of Emergency Management call center will be open on Thursday from 9 a.m. to 5 p.m. for transportation assistance, 303-413-7730.

9:14 p.m. The following areas are on accident alert: Arapahoe County, Commerce City, Castle Rock, Broomfield City and County.

8:01 p.m. U.S. 40 is closed in both directions from Kremmling to Steamboat Springs with no estimate for reopening.

7:48 p.m. I-25 northbound reopened between Colorado 1 and the Wyoming border.

7 p.m. U.S. 287 from Ted’s Place north to the state line has been closed because of hazardous conditions, according to Colorado State Patrol. Interstate 25 from milepost 278 in Wellington to the Wyoming border remains closed.

6:55 p.m. The commercial vehicle chain law on I-70 eastbound was lifted between Exit 176 (Vail) and Exit 190 (Vail Pass Summit).

6:37 p.m. U.S. 85 is closed from Ault to the state line, according to Weld County Office of Emergency Management.

6:14 p.m. Denver’s temperature has dropped to -1, with a wind chill of -22.

6:05 p.m. CDOT: Colorado 14 westbound is closed between North 10th Avenue and County Road 33. Colorado 14 is closed in both directions from Ault to Sterling because of adverse conditions and low visibility.

5:55 p.m. Preliminary data at Denver International Airport showed a drop of 42 degrees to 5 degrees in one hour. That would be the biggest one-hour drop in that station’s history, according to the National Weather Service.

5:52 p.m. Denver International Airport had 152 flight cancellations so far on Wednesday and 552 delays, according to FlightAware.

5:39 p.m. Chain law restrictions for commercial motor vehicles were in effect on Interstate 70 between Silverthorne (milepost 205) and Georgetown (MP 228) as well as over Vail Pass (MP 178-MP 190). There are no rest areas between the Denver area and Vail.

5:10 p.m. Interstate 25 is closed in both directions from Wellington Exit 278 to the Wyoming state line because of adverse conditions.

4:50 p.m. Temperatures dropped below zero in parts of the Eastern Plains, and wind chill temperatures began to dip dangerously low across the region. Wind chill temperatures in Denver were measured at -13 degrees, while they reached -20 in Greeley and -32 in Fort Morgan.

4:33 p.m. A snow squall warning was in effect near Carr in Weld County, including Interstate 25 between 285-297.

4:27 p.m. Temperatures in Colorado showed huge drops in minutes. Greeley’s temperature dropped 30 degrees in 9 minutes. Fort Lupton’s dropped 28 degrees in 10 minutes.

4:07 p.m. Backups are starting on Interstate 70 at the Eisenhower tunnel, where snow is accumulating. On state Highway 392 north of Loveland, FOX31’s Shaul Turner recorded a 30-degree temperature drop from two hours ago.

Denver International Airport recorded a temperature of 17 degrees. This is a 30-degree drop in less than half an hour, Pinpoint Weather meteorologist Dave Fraser said.

4:01 p.m. Rapidly falling temperatures of as much as 35-40 degrees in an hour are expected as the cold front arrives in Colorado, NWS Boulder said.

Rocky Mountain National Park reported steady snow falling in the Bear Lake area with poor visibility, high winds and about half an inch of accumulation. The park’s traction law was put into effect.

Wednesday 3:43 p.m. The arctic cold front has already moved into Cheyenne, Wyoming. Starting at 1 p.m., the temperature plunged from 43 to 3 degrees in just 30 minutes, according to the National Weather Service. A snow squall warning was in effect until 4 p.m. for the area.