Month: January 2026

Here’s what we know, and what we don’t about the impending deep freeze

In brief: In today’s post we discuss the ongoing forecast with a winter storm that is due to arrive in Houston about 36 hours from now. With this update we list some things we know, and some we don’t about the forthcoming freeze.

Overview

Good afternoon. We are about a day and a half from freezing temperatures descending into the Houston metro area. Not much has changed with our overall forecast. Area roadways should be fine through Saturday evening, but by early Sunday we have questions and concerns. At this point I’m a little more bullish on ice in the Houston metro area, so I am leaning a little more toward a disruptive event on Sunday and possibly Monday morning, especially for locations north of Interstate 10. But it is far from a done deal.

Current National Weather Service forecast for ice accumulations in the Houston region. (Weather Bell)

We also still have questions about how cold temperatures will get on Monday and Tuesday mornings. I would ballpark lows at about 20 degrees in urban Houston (a little cooler for inland sites such as Katy, Tomball, The Woodlands, and Kingwood) and a little warmer for locations closer to the coast, such as League City. But there is the possibility those temperatures are too low. Anyway, on to what we know, and what we don’t.

We know: If you need to make a closure decision now, err on the side of caution

I’m still not sure what Houston’s roads will look like on Sunday morning, later in the day, and on Monday morning. Following precipitation on Sunday morning, which could fall as freezing rain or cold rain, we could be anywhere from “bone dry” to “icy bridges and overpasses” to “widespread ice” by Sunday afternoon. I know this is a huge cop-out, but it’s the truth due to uncertainty about air temperatures on Sunday. Anyway, we’ve already seen decisions by the Houston Independent School District and a handful of other districts to close on Monday. This is understandable, given the uncertainty. If you can’t wait to make a closure decision, that’s prudent. If you can wait, there’s still a chance things will be mostly fine on roads.

We don’t know: What will happen with electricity?

There are two issues with getting electricity into your home. The first of these is generation. This was the killer during the February 2021 winter storm, when large chunks of the Texas power grid were taken offline due to plants shutting down. If you’re like me, you’ve been periodically checking the “supply and demand” projection from ERCOT. Everything looks more of less fine, but there does appear to be a potential supply crunch on Monday morning, around sunrise, when temperatures are at their coldest.

The other issue is distribution, with the main concern in ice accumulating on tree limbs and power lines, causing them to snap. CenterPoint Energy, which is responsible for distribution in the greater Houston area, says they are making all necessary preparations. The bottom line is that I don’t expect to see the extreme and disastrous power losses experienced during the winter storm of 2021. But that’s not to say there won’t be some disruptions in service.

We know: People are panic shopping

I’ve heard from people, and can see from social media, that y’all are raiding grocery stores for all manner of supplies. (Pro tip: Kroger appears to be less crowded than HEB). But you don’t need to stock up forever, friends. Regardless of what happens, roads will very likely be passable on Monday afternoon, and at the very worst Tuesday when we’re back up into the 40s.

Current forecast for low temperatures on Monday morning. (Weather Bell)

We don’t know: How low will temperatures go?

Forecasting low temperatures is difficult during winter events like this. One factor is ice. If there is a lot of it covering areas north of Houston, and within the city itself, than northerly winds moving over this ice will cool down more efficiently. This will lead to colder temperatures (possibly teens) in and around Houston. However it is also plausible that much of the city only drops to about 25 degrees. Our best advice is to prepare for the colder temperatures, and hope for “warmer” conditions.

We know: Thunderstorms are possible on Saturday

A decent line of thunderstorms will pass through Houston on Saturday morning, likely during the mid-morning hours. Thunderstorms will be more likely along and south of Interstate 10 and closer to the coast. These could drop 1 to 2 inches of rain pretty quickly, so keep that in mind as part of your winterization preparations. After these storms pass I expect a lull in rain (for the most part) as temperatures drop into the 40s on Saturday afternoon. A second round of showers will likely spin up early on Sunday and persist into the mid-morning hours.

We don’t know: How airports will be affected

I know, you have flight questions. I wish we had answers. Flying on Saturday should not be problematic, but it’s difficult to say the same about Sunday and possibly Monday morning. Of note, many airlines have issued waivers for change fees for today through Monday.

We know: Space City Weather does not use made up storm names

The Weather Channel, as it has done for more than a decade, has named the impending winter storm “Fern.” These names are not official, and there is no significant evidence they do anything to enhance safety. Also, “Fern” is a pretty dumb name for a storm. So we won’t be using it (just like we have never used “Uri” for the 2021 deep freeze).

Our next update will be posted by 7 am CT on Saturday. I will also be doing an additional Q&A at 11 am tomorrow on our Facebook page. Thanks for your patience as we work through a difficult forecast here.

The Arctic front is now nearing Texas. Here’s the latest on what it means for the greater Houston area.

In brief: In today’s post we dive into the latest data about the impending winter storm and share our thoughts about freezing rain, hard freezes, and more in Houston. There is also a new wrinkle, with the potential for thunderstorms on Saturday morning. Because, why not?

Winter Storm overview

We continue to monitor the impacts from an Arctic front that will arrive this weekend in the Houston region. Friday and Saturday should be fine for getting around, although in a new wrinkle we now anticipate the potential for some thunderstorms on Saturday morning. Fortunately this will fall just as rain. We are still watching closely for when temperatures reach the freezing mark in the metro area, as that will make all the difference as to whether we see freezing rain and icy roads on Sunday morning. See below for a full discussion of all this.

Friday

We are seeing plenty of fog across the area this morning, with light winds, and temperatures and dewpoints both settling at about 60 degrees. Highs today will push into the upper 60s, with mostly cloudy skies. We could see a few light showers, but these should be nothing to write home about. Lows tonight should drop into the 50s, area-wide, as the initial push of colder air arrives from the cold front.

HRRR model forecast for radar reflectivity at 11 am CT on Saturday in Houston. This (and other models) support the idea of thunderstorms rolling through by around, or before noon. (Weather Bell)

Saturday

There’s a new threat to talk about on Saturday. There will be an interesting setup with very moist, and warm air offshore and much colder air over inland parts of Texas. This could well lead to the development of some thunderstorms during the mid-morning hours on Saturday, as essentially a line of storms pushes through. This is likely to drop 0.5 to 1.0 inch of rain pretty quickly, and I hope the city’s efforts to treat bridges and overpasses for ice (which may come later) takes this rainfall into account. With temperatures likely around 50 degrees in Houston on Saturday, this will indeed just fall as rain.

After these showers and storms move through, we could see an end to precipitation for awhile on Saturday afternoon, although our skies will remain mostly cloudy. Temperatures likely will hover in the 40s during the afternoon hours, with modest northerly winds. At some point on Saturday evening to Saturday night, freezing temperatures will start to get closer to the area. They could arrive in Montgomery County by around 9 pm to midnight, and likely not moving into Harris and counties closer to the coast until after midnight or later. I expect area roadways to remain passable, at the very least, through Saturday evening.

Sunday

Ahh, Sunday. This day remains the bane of a forecaster’s existence. We really need to know precise temperatures throughout the day, literally to within a degree, and as of yet we still don’t have that kind of certainty.

With that said, I expect to see additional light showers overnight on Saturday into Sunday, followed by what may be a second line of showers and thunderstorms around sunrise on Sunday, or shortly thereafter. And then the rain should exit to our east, for good.

Question no. 1 is: How cold with temperatures be across the metro area at sunrise on Sunday? If they’re below freezing at your location, there’s a decent chance of some minor ice accumulation. If they’re above freezing at your location, it’s just very cold rain. I think there’s about a 50 percent chance of freezing temperatures in a location such as The Woodlands at this time, and perhaps less than 50 percent along the I-10 corridor in Houston, and less still south of there. So when you wake up on Sunday and consider going out and about, you’re going to need to be weather aware. Check local temperatures. See if the precipitation has moved on. Read what we’re saying here. Roads on Sunday morning may be fine. They may be mostly OK with some issues on elevated surfaces. Or it may be pretty icy out there and you should stay inside.

For now our best guess (emphasis on guess) is this: There could be up to 0.2 inch of ice accumulation in Montgomery County, especially along and north of Highway 105. Ares of northwest Harris County, as well as Waller and Austin counties, may see some minor ice accumulations. Areas closer to the coast probably will not.

Current forecast for high temperatures on Sunday. Note these are subject to change, but basically anywhere temperatures are above 32 degrees there will be a chance for any ice to melt, and roads to dry. (Weather Bell)

Question no. 2 is: How warm will temperatures get on Sunday afternoon? As precipitation exits to the east, we should see some partially clearing skies on Sunday. With gusty northwesterly winds (perhaps up to 25 mph from the north) we are going to see a lot of very cold air advecting in. If temperatures are above freezing in your location for a couple of hours, with a little sunshine and these winds, we are going to see good conditions to dry out roads. However, if temperatures remain at or below freezing at your location, any ice is going to stick around. My general guess is that we are going to see roads dry out, at least in non-shadowed areas. But an alternative possibility is that we don’t get enough heat or sunlight before frigid temperatures descend Sunday evening. Again this is going to have to be a game time decision.

We remain highly confident in temperatures plunging on Sunday night, probably down to the 20-25 degree range in urban Houston, with conditions a little warmer closer to the coast, and a little cooler in places like Katy and The Woodlands (15 to 25 degrees). Note there still is some uncertainty about how cold it will get.

Current map of low temperatures for Monday morning in Houston. (Weather Bell)

Monday

What roads look like on Monday morning will depend on what they looked like Sunday evening. We are not going to see any additional precipitation, so if they’re dry on Sunday night, they’ll be dry on Monday morning. We should see temperatures climb to highs between 35 and 40 degrees on Monday, and with clear skies and light winds, we can expect another very cold night. Temperatures likely only be 1 to 3 degrees above conditions on Sunday night.

Tuesday and beyond

We’ll warm up a little next week, likely with highs in the 50s and lows in the 30s until Thursday or Friday. After that time there’s the potential for a secondary Arctic blast, although I don’t think the overall airmass is going to be quite as cold this time. However there is also a non-zero chance of some snow with this system. But it’s all pretty fuzzy, and the models are hopping around a lot from run-to-run. So we’re not going to speculate too much here.

Our next update will be posted by or before 3 pm CT today.

A message from Reliant

If you’re new to our website, welcome. We recently celebrated the tenth anniversary of Space City Weather, and have always been—and always will be—free and freely available with no paywalls. We do not track our readers or collect their personal information. This is possible because of our readers who contribute to our annual fundraiser, and our long-time sponsor, Reliant. They have been our valued partner since 2017, and have helped us grow over that time. Today they want to offer a few tips to help you stay warm and manage electricity usage during upcoming freeze.

Try space heaters in high-traffic rooms. Lower your thermostat and use an energy-efficient space heater in rooms where you spend the most time.

Check your thermostat. If you have an electric heater, set the thermostat to 68 degrees while you’re awake. Lower it and add an extra blanket while you sleep to save energy.

Use your drapes. Thermal drapes can help block drafts and retain heat, especially on older windows. Open south-facing curtains during the day to let in sunlight and close them at night to trap warmth.

Invest in smart plugs and smart power strips. These allow you to control the power supply to devices remotely via a smartphone app. This way, you can easily shut off power to devices not in use, even when you’re not at home.

Layer up. Reach for a sweater or blanket before reaching for the thermostat. Weather-appropriate clothes help reduce the demand for heat. Plug in your electric blanket and stay warm for around 25 cents a day.

Install insulation. While more of a long-term project, you can regulate your home’s temperature and reduce heating costs by adding insulation.

Weatherstrip exterior doors and windows. With a couple of hours’ work, you can seal out the cold and save up to 10 percent on total energy costs.

The SCW Q&A: Eric tackles your questions about the upcoming freeze

On Thursday afternoon, Eric spent about an hour answering questions regarding the upcoming freezing weather event on the SCW Facebook page. There were more than 550 comments left, and Eric was able to get to a little more than 40 . You can read the best and most useful below. We’ll plan another one of these before the freeze hits, so stay tuned!

Texas Department of Transportation crews prepare to hit Houston-area streets with anti-freezing materials. (Courtesy TxDoT).

Q. I’m an essential worker in the med center, the hospital told us so far they don’t intend to call in the ride out team to where we have to stay at the hospital saturday-monday but that it could change. do you expect the conditions to get worse in the medical center area of houston or to stay the same?

A. I think that’s a prudent decision by the hospital. At this point I would lump the Medical Center in with “urban Houston,” and whether we see icy roads will depend on air temperatures on Sunday in the city. I wrote about this in our Thursday afternoon update, with the “Slower freeze” and “Faster freeze” scenarios.

Q. What impact will the ice further north of Houston have on statewide power grid? I read your post about centerpoint expecting to have sufficient power, but wasn’t sure if the broad band of icy weather could reduce the available power source again or if we are safe as long as we don’t have ice taking down local lines.

A. We are really beyond my area of expertise here. ERCOT is projecting a power surplus through the event, but certainly there could be issues with icy roads (i.e. getting workers and delivery trucks to these plants). But my sense is that generation will be up to the task with this cold weather. I hope those are not famous last words.

Q. How does the forecast compare to what we expected and what happened during [the 2021 freeze event]?

A. That lasted longer (about four days of very cold air) and its coldest temperatures were 5 to 10 degrees below what we are likely to experience this weekend. In terms of magnitude of cold, it was a more significant event.

Q. Is this weather system expected to be severe and disruptive enough to force Houston Medical Center hospitals to reduce operations? (For those of us with scheduled procedures on Monday.) Thank you!

A. It’s a good question. I cannot see hospitals closing, but out of caution they may cancel non-emergency procedures. It will depend on the likelihood of icy roads (impacting the ability of employees and patients to get to the hospital). We should know in another day or so whether that’s likely to occur in Houston.

Q. My niece is getting off her cruise ship on Saturday around 8:00 am and needs to drive home to Mineral Wells near Fort Worth. Is this a good idea?

A. I don’t think so. I think she’d be fine until she gets about half way to Dallas-Fort Worth from Houston, maybe even a little further. But after that point the risk of freezing rain is going to start going up. And being stuck in that is a potential nightmare.

Q. I need to fly to Hartford, CT or Albany (I have a choice) on Sunday leaving at 2 pm. Would leaving out of Hobby be a better choice than IAH? What are the chances the flights can go from Houston Sunday at 2 p.m.?

A. Hobby is a better choice. As for flights from Hobby it will depend on air temperatures, but I think there is probably a better than 50:50 chance that the airport is operational on Sunday afternoon.

Q. Can you pull the curtain back and tell us what your process is for monitoring these storms, when they seem to change over time? Are you constantly checking or every 2-4 hours for one model, 6-8 for another, etc?

A. There are about a dozen models I’m checking. Some update every hour, others every 6 hours, and a handful every 12 hours. So they’re all over the map. I wake up around 5:00 am and spend a long time preparing for the morning forecast. Then, for sanity’s sake, I’ll take a break for a few hours before looking at all the data coming out by or before noon.

Q. Do you hang your toilet paper roll over or under? Just kidding, maybe. All jokes aside, do you recommend dripping faucets overnights or periodically throughout the day/evening?

A. Over, of course! The notion of dripping faucets is a little bit controversial. We weighed in here, about a year ago.

Q. Are we getting really hard freeze events more frequently? I feel like it’s an annual thing now whereas until 5 years ago I felt like it was every 5 years or so we would see temps as low as upper teens.

A. This is something I want Matt to dig into when we come up for air. In the last five years we have gotten four pretty stout hard freezes and that does not feel normal for Houston, at least over the nearly 30 years I have lived here.

Q. I run a flag football little league with a few hundred kids age 6-14 involved. I am cancelling the games we had scheduled Sunday, but we had many scheduled Saturday until about 3:30 pm. Do you think there’s any way we can play in the weather Saturday, for example, could it be in the high 50s?

A. Sounds like this is an awesome initiative. I think temperatures will be fine on Saturday before 3:30 pm, but it is likely going to be raining, and at this point I believe there is also a chance of thunderstorms. So this probably is not the best environment to have children outside.

Q. What is causing the confusion amongst forecasters? Within my viewing area, many of the news meteorologists are forecasting slightly different outcomes.

A. It’s largely because it is not clear what temperatures will be in Houston on Sunday from about 10 am to 6 pm. This is the period when we could really see ice form on roads, or not. And, at present, the range of temperatures for this time period is roughly 30 to 40 degrees, depending on your choice of model or ensemble. This is why you’ve seen me constantly saying, “We’re not sure yet!”

Q. At the coldest, what do you estimate the low temperature spread will be for Houston proper (N, S, E, W) vs. Katy, The Woodlands, Kingwood, and Galveston? (The “outlying areas” are usually different from town.)

A. For The Woodlands and Katy I would put lows between 18-22 degrees on Monday morning; 19-24 in Houston, and 22-30 right along the coast.

Q. Best timing for covering outdoor plants? Saturday afternoon/evening so they get some rain or better to go ahead and cover them on Friday?

A. I’d think whenever you can get to it. Most plants got a lot of beneficial rain on Wednesday.

Q. What is MSN smoking?

A. I don’t know. It’s difficult for me to see snow falling much south of Dallas and Fort Worth, and certainly not in Houston. There are a lot of great weather apps out there, but at the end of the day it helps to have a human in the loop to ground truth all this data.

Q. Should Katy evacuate??? IYKYK 😜😂

A. Check the Settings, then the Notifications item in our app to get a definitive answer to this!

Will Houston see freezing rain and pain on Sunday, or something less impactful? It will be close

In brief: In this afternoon’s post we discuss what we think will happen in Houston and surrounding counties with the forthcoming winter weather, and when it will happen. We also have some advice for people making closure decisions, and an opportunity for you to ask questions later today.

Ask me anything today

We’ve gotten a ton of questions, as you might imagine, about impacts from the freeze, and what it means for getting around Houston and traveling beyond the city this weekend. I’m going to set aside some time, beginning at 4 pm CT today, to answer your questions on Facebook. I’ll create a post and take your questions there. If you don’t use Facebook, don’t worry. We’ll collect some of the best and most-asked questions and repost them here on Space City Weather.

Wait to make closure decisions, if you can

We’ve also heard from business and other entities making decisions about closing on Monday. I fully recognize that everyone has their own timeline, and prefers to give people as much time to make accommodations. All I would really like to say here is that if you can wait to make a decision, it is probably in your best interest to do so. There are scenarios in which the “winter storm” this weekend has relatively modest impacts on the region and our roads. There are also scenarios in which the ice accumulation is enough to shut things down on Sunday and Monday morning. What we’re struggling with as meteorologists is just how crippling the impacts will be. Right now Matt and I are leaning slightly toward “modest” rather than “crippling” impacts, but it us just too early to say for sure. Anyway, if you need to make a decision today, you should err on the side of caution. If you can wait another day or two, you may benefit from better weather information.

Winter storm forecast

The forecast, as we’ve outlined for the last 24 hours, remains more or less on track. So for this afternoon’s post I thought I would do a post about what to expect, and when.

As of 6pm CT Saturday we expect temperatures to still be well above freezing in the Houston metro areas. But just you wait! (Weather Bell)

Friday, Friday night, and Saturday

This period should be moderately warm, with increasing rain chances on Friday evening and for much of Saturday. Although the cold front will arrive on Friday, it is going to take a secondary push before the Arctic air really pushes in. So on Friday we can generally expect temperatures in the 60s, with overnight lows in the 50s, and then temperatures in the 50s (perhaps 60s closer to the coast) on Saturday. This means that, when the majority of precipitation falls on Saturday, it’s going to just fall harmlessly as rain. That’s great.

Saturday night and Sunday

That secondary push of colder air will arrive sometime on Saturday night. We think it will arrive late enough such that getting around Harris County should pose no problems through at least 9 pm CT on Saturday. (This deadline may come a little earlier in Montgomery County, where temperatures will be quicker to reach freezing level). After this point we’re not quite sure how cold it will get, and how quickly. Let’s quickly go over two scenarios:

Slower Freeze: There is a world in which air temperatures on Sunday remain in the 33 to 40 degree range in Harris County and other parts of suburban Houston (outside of Montgomery County). At the same time we would see the end of showers on Sunday, and some sunshine during the afternoon to help dry out roads. In this scenario mobility issues on Sunday and Monday morning are mostly ok, although we would definitely have some concerns about bridges and overpasses.

Faster Freeze: In this scenario daytime temperatures drop to freezing during the daytime Sunday in Houston and surrounding areas, and we continue to see precipitation that falls as freezing rain. This accumulates on Sunday afternoon and there is no time for it to melt or evaporate before a hard freeze Sunday night. In this case driving around Houston on Sunday, Sunday night, and Monday is rather hazardous.

So which will happen? We just cannot predict with any confidence right now. Sorry. The European model and some of our emerging high-resolution guidance support the “slower freeze” scenario, but there is plenty of data to support a “faster freeze” scenario as well. Hopefully things will clarify in the next day or so, but no promises there.

Minimum temperature forecast for Monday morning. (Weather Bell)

Sunday night into Monday

It’s gonna get really cold on Sunday night, with temperatures likely falling to the 20 to 24 degree range in urban Houston, with colder conditions for outlying areas. This meets the criteria for a hard freeze, so all steps should be taken to protect pipes, plants, and pets. We continue to be hopeful that Monday will be sunny and see temperatures in the upper 30s to 40 degrees, which should solve ice issues on roads in Houston. What I’m not sure about is how far north these “above-freezing” temperatures will extend. For example, will ice melt from roads in Conroe or Huntsville on Monday afternoon? I’m not sure.

What about another ‘winter storm’ next week?

Yes, there is some possibility of another Arctic outbreak during the Friday, Saturday, and Sunday period of next week. Everything from snow on down is on the table. At this point it doesn’t look like absolute air temperatures will get as cold as this weekend, but we’ll just have to wait and see. One disaster at a time, y’all!

We’ll have an update this evening with the best questions and answers from our “Ask me Anything” this afternoon.