120 million under wind chill alerts as "dangerously cold temperatures" envelop much of U.S.
Editor's note: Follow the latest updates on the extreme U.S. weather here.
"Dangerously cold temperatures" and wind chills enveloped much of the U.S. on Monday, disrupting travel and closing schools — as the National Weather Service warned more records would be tied or broken.
The big picture: At least nine deaths have been attributed to the Arctic blast that's sweeping the country — including four since Friday in Oregon, which continued to experience widespread power outages and disruptions to public transportation on Monday due to what public agency TriMet described as a "historic winter storm."
- Over 120 million people were under wind chill warnings and advisories Monday evening — including in Iowa, where former President Trump won the first contest of the 2024 primary season as the state experienced its coldest caucus day on record.
Today is turning out to be the coldest Iowa caucus day in history, dating back to 1972. Highs thus at Des Moines (+1°) & Waterloo (-1°) have been 15 & 16 degrees colder than the previous coldest caucus day. Here's a look at some of those colder historical highs & lows. #iawx pic.twitter.com/FHoKqTl3uY
— NWS Des Moines (@NWSDesMoines) January 15, 2024
Meanwhile, the NWS said in a Monday evening forecast discussion that snow and freezing rain was continuing over the Southern U.S. and spreading into the Mid-Atlantic and Northeast through Tuesday.
- Downwind of the Great Lakes, the NWS noted that heavy lake effect snowfall was continuing, with "significant travel impacts" expected.
State of play: In addition to the deaths in Oregon, officials in Milwaukee said three homeless people died over the weekend from "probable hypothermia."
- On Sunday, authorities in Wyoming reported a skier died during an avalanche on Sunday and officials in Utah said a snowmobile rider was killed the same day after being hit by a semitrailer as almost 4 feet of snow fell in the state's mountains.
- The threat of snow prompted schools in several major U.S. cities to announce closures Tuesday, including D.C., Chicago, Denver and Atlanta.
- In Texas, ERCOT issued a statewide conservation appeal for a second day Monday during the Arctic blast in an effort to avoid a repeat of the major failure that occurred during a deadly February 2021 cold snap.
TXANS Update—Jan. 15, 2024: ERCOT has issued a Conservation Appeal for Tuesday, Jan. 16, from 6 – 9 a.m. CT. With the winter storm encompassing the entire state and temperatures forecasted to be colder this evening and into tomorrow morning, ERCOT is asking Texans to conserve… pic.twitter.com/2JBXFhnvkp
— ERCOT (@ERCOT_ISO) January 15, 2024
By the numbers: Over 8,000 customers in Texas were without power by Tuesday morning, per poweroutage.us.
- In Oregon, nearly 58,000 were without power and some 30,000 in Louisiana also had no electricity, according to the utility tracker.
- More than 9,000 flights within, into, or out of the U.S. were delayed and over 4,000 canceled by Monday night, per the flight-tracking service FlightAware.
Of note: New daily temperature records were set or tied across the U.S.
- These include in Clayton, New Mexico, which the NWS' Albuquerque office said "managed to make it up to 8 degrees before the second surge of arctic air arrived at around noon" — breaking the previous minimum record high of 15°F set in 1930.
- Pueblo, Colorado's, temperature of 5°F marked the coldest Jan. 15 high temperature since records began, and the Hastings airport in Nebraska tied the morning's low temperature of -11°F.
It's official! Over 1" of snow so far in DC & Baltimore, first time in approx. two years we've had this much snow! Through 7 PM
— NWS Baltimore-Washington (@NWS_BaltWash) January 16, 2024
❄️IAD: 1.8" (breaks 1" drought of 673 days)
❄️DCA: 1.8" (breaks 1" drought of 728 days)
❄️BWI: 1.4" (breaks 1" drought of 716 days) #MDwx #VAwx #DCwx
In photos: Arctic blast slams U.S.
It's been a rough few days for all snowfighters, but we're so proud of the way our crews jumped in to help each other. This is U.S. 218 near LaPorte City. The teamwork from all over the state has been incredible and we are beyond thankful for all of our dedicated teams. pic.twitter.com/9C9TnG977K
— Iowa DOT (@iowadot) January 15, 2024
Despite little rest, MDOT crews are still locked in and dedicated to finishing the job.💪❄️
— MDOT (@MississippiDOT) January 15, 2024
This snowplow is clearing I-55 north of Batesville. #WorkingForYou #MSwx pic.twitter.com/cGOadWsF4w
Crews have been treating roads since Fri. & will continue monitoring major roadways. Be on the lookout for workers conducting treatment. Even with precipitation moving out, it's still bitter cold. Go prepared if you must travel! Drive slower/distance yourself. #BeSafeDriveSmart pic.twitter.com/Yq65WHNZof
— TxDOT Austin (@TxDOTAustin) January 15, 2024
First light pillars, now sundogs! The cold isn't so bad every now and then when it gives us optical phenomena like these, right? 😎 #KSwx #COwx #NEwx pic.twitter.com/IxoJggilab
— NWS Goodland (@NWSGoodland) January 15, 2024
Roadway conditions will deteriorate as winter weather continues to impact portions of the state. Travel should be restricted to essential only. DOTD crews will continue operations throughout this event. pic.twitter.com/okQr0VCCXi
— Louisiana DOTD (@La_DOTD) January 15, 2024
Go deeper... Winter whiplash: Why a parade of storms is suddenly slamming the U.S.
Editor's note: This a breaking news story. Please check back for updates.