Live updates: Wintry mix begins Thursday; latest school closing list here

A Winter Storm Warning is in effect until noon Friday for a storm expected to bring between a wintry mix of precipitation, including snow between 1 and 5 inches, to much of North Texas. During the winter storm, the National Weather Services expects mixed precipitation to transition to all snow on Thursday evening, with total accumulations between 2 and 4 inches. Isolated snowfall amounts could top 8 inches with more intense bands. Ice accumulation is possible up to 1/10 of an inch, making travel by road treacherous.

Latest weather forecast

NBC 5 Chief Meteorologist Rick Mitchell said temperatures on Thursday morning will be near freezing and whether snow or a wintry mix falls depends on the surface temperature. If the temperature warms, the precipitation will transition from snow to a wintry mix.

By mid-morning, that'll transition to sleet and ice to the south and snow to the north. There could be a wintry mix on Thursday afternoon and snow and rain to the south. On Thursday evening, more snow to the north and a wintry mix near DFW with rain to the south.

Where the line transitions from snow to a wintry mix could shift north or south depending on the temperature. Rick said if the temperature holds, he expected a wintry mix in the southern counties with up to an inch of snow. To the north, across the middle of the Metroplex, Rick expected between 1 and 3 inches of snow to fall. Moving north toward the Red River, Rick said between 3 and 5 inches of snow are expected.

Further south on Thursday, cold rain is expected in Central Texas with no wintry precipitation expected, though minor accumulations are possible.

The precipitation ends early Friday, and the sun will return over the weekend.

Stay weather-aware and up-to-date on changes in the forecast.

NOTE: If you received push alerts about snow falling at your location on Tuesday night and didn't see any snow falling, those alerts were triggered by the National Weather Service’s NEXRAD radar after virga was detected. Virga is precipitation that falls, but does not make it to the ground. The latest winter storm forecast from NBC 5's team of Weather Experts can be seen below.

Polar vortex readies to dump snow on Texas

In North Texas, road crews treated roads ahead of the storm's arrival.

Mark Reid said Wednesday that he has been very busy delivering groceries for Instacart.

“I'm going to be done probably about 5 or 6 (p.m.) today and then tomorrow I'm going to be in the house," Reid said outside of a Dallas grocery store as he loaded his fourth order of the day into his car.

Texas Gov. Greg Abbott said Wednesday that the state had deployed several emergency agencies and opened hundreds of warming centers ahead of the storm.

“The lives of our fellow Texans are by far the most important thing,” he said, warning affected residents to avoid driving if possible.

Abbott also expressed confidence in the state's power grid, which failed during an unusually cold storm in 2021, leaving more than 3 million residents without power and resulting in the deaths of more than 200 people. He said that if an outage occurs this week, it's likely due to a downed power line.

“If there is a loss of power, it’s not going to be because of the power grid,” the governor said.

The storm could make the roads slick on Friday as 75,000 fans head to AT&T Stadium in Arlington to see Texas play Ohio State in the Cotton Bowl. Arlington spokesperson Susan Shrock said crews will be ready to address any hazardous road conditions around the stadium.

ERCOT issued a Weather Watch for Monday-Friday as cold weather appears here to stay.

ERCOT TXANS and Emergency Levels Explained

In 2023, ERCOT debuted TXANS to deliver clear and reliable information to the public about grid conditions. Here’s what the alert levels mean:

• Weather Watch: A Weather Watch is an advanced notification of an upcoming weather system that is expected to increase electricity usage. Texans are asked to pay attention to changing weather conditions that may result in a call for conservation. During a Weather Watch, grid conditions and electricity use are normal.
• Conservation Alert: This is a voluntary request to reduce electrical use, ERCOT said. While ERCOT said it is not in emergency operations, it asks the public and “all government agencies to implement all programs to reduce energy use at their facilities.”
• Energy Emergency Level 1: Conservation is considered to be critical. We reach this stage when operating reserves drop below 2,300 MW and are not expected to recover within 30 minutes.
• Emergency Level 2: Triggered when reserves are less than 1,750 MW and are not expected to recover within 30 minutes. At this point, ERCOT can reduce demand on the system by interrupting power from large industrial customers who have contractually agreed to have their electricity turned off during an emergency.
• Emergency Level 3: The final level hits when reserves drop below 1,430 MW. If operating reserves then drop below 1,000 MW and are not expected to recover within 30 minutes and/or the grid’s frequency level cannot be maintained at 60 Hz, then ERCOT will implement “controlled outages,” also known as rolling blackouts.

COLD WEATHER PREPARATION

Winterizing Your Home
Before the cold, replace worn weatherstripping on doors and windows to ensure a good seal. This will make sure warm air stays inside and cold air stays outside. Most modern windows are sealed inside the frame, but older windows may be sealed with a glaze that can crack and need replacing. The glaze may need to be applied above a certain temperature and it'll need time to cure -- this maintenance is ideally done in the spring or fall. Lastly, check your gutters to ensure they are clear and allow water to flow freely to the downspout. Blocked gutters can lead to water entering the home.  The Texas Department of Insurance also recommends trimming trees away from power lines, homes, and cars and checking the insulation level in attics.

Protecting Your Pipes
Most North Texans know to insulate their outdoor faucets, but if the cold snap is prolonged it could be a good idea to also leave inside faucets on external walls dripping overnight so that they don't freeze. The drip, drip, drip from running faucets, if heard, can be annoying, so put a sponge or towel in the sink to silently catch each drop. If you're leaving town for a few days, the Texas Department of Insurance recommends leaving cabinet doors open so that pipes on external walls are more exposed to heat. If you have pipes in an attic or crawlspace or any other exposed pipes outdoors, they'll need insulation, too. For external faucets, disconnect hoses and insulate the valves. Wrapping valves with towels is not the best long-term solution. Most, if not all, North Texas hardware stores sell inexpensive exterior faucet covers made of foam that easily attach to the faucet bib in just a few seconds and do a great job protecting the pipe from freezing. If you suspect a pipe has frozen, keep the faucet open so that water can flow when it melts. Additionally, make sure you know where your main water valve is located (and how to turn it off) in the event a pipe bursts.

Bring in Your Pets
Even if you have a pet or animal that normally lives or sleeps outdoors, they could be susceptible to cold, hypothermia, and pneumonia. The SPCA of Texas says if you're cold outside, odds are your pet is cold too. Bring pets inside and make sure other outdoor animals have appropriate shelter, dry and well insulated, to protect them from frigid temperatures and possible death.

Protecting Your Plants
Perennial potted plants should be brought indoors. Plants that cannot be brought inside will need to be covered. Delicate plants can be covered with sheets, blankets, or landscaping frost blankets, which can trap heat. During times of extreme cold, multiple frost blankets may be used. For plants left outside a day or two before a freeze hits, the Dallas Arboretum recommends watering the soil only by hand, keeping the foliage dry to insulate the plant's roots. The Texas A&M AgriLife Extension has more here on how to protect plants from frosts and freezes. AgriLife also has tips on how to plant for the winter.

Dallas Arboretum

Turn Off Your Sprinkler System
You want to turn off your irrigation system for several reasons. One is that you don't want it running on its normal schedule, potentially throwing water on streets where it can freeze and be dangerous for passing cars. Second, you don't want to risk any broken pipes or valves that may come with a system that has not been winterized. To winterize your system, the city of Fort Worth recommends that timers and back-flow devices both be turned off, even if you have freeze or rain sensors installed and that the main line be drained. Any pipes that are above the ground should also be insulated.

HVAC
Many air filters should be changed or cleaned every three months or every season. But that's not the only winterizing needed for your HVAC system. You should check your ductwork regularly for holes (whether from vibration or rodents) to ensure the airflow is uninterrupted. If part of your HVAC is in the attic, it may also be home to rats, mice, and squirrels who find the unit's warmth an ideal spot to build a nest.

Swimming Pools
Even if you have a freeze protector among your pool equipment, you'll want to look at the pump daily to ensure it's moving water through your pipes. Those pipes, too, can burst if they freeze.

Batteries
Having fresh batteries for flashlights during a power outage is always a good idea.  If you didn't replace the batteries in your smoke and carbon monoxide detectors during daylight saving time -- now is a good time to make the switch. It's also a good idea to ensure your phone is charged so that you'll have access to timely information in the event of a power loss. Having a backup battery or power source to recharge your phone is also a good idea.