Eric Berger

Good morning. Before jumping in to the forecast, I wanted to briefly talk about the recent sharp cold snap Houston experienced, and its effects on mosquitoes. Unlike a regular freeze, widespread temperatures in the teens may have some significant effect on populations. A recent study found that temperatures below 20 degrees Fahrenheit significantly reduced the number of viable larvae, as only eggs laid in well insulated areas will survive.

This will not wipe out the population, but it should put a dent in their numbers this spring. For how long? Scientists say a wet and warm spring could bring populations back to near normal later this summer. As for conditions in Houston this spring, we’ll have an outlook for you tomorrow.

Monday

A cold front is slogging through Houston this morning, and if you’re inland of Interstate 69 you’re already beginning to feel its effects. But if you live closer to the coast, its passage won’t come for a few more hours as the front probably won’t move offshore until shortly after noon. Behind the front, temperatures today will be in the 50s for inland areas, and after the front passes, in the low 60s for coastal areas.

The other notable feature today will be increasing rain chances from around noon through the evening hours. This will offer a reasonably good soaking for the area, with 0.25 to 1.0 inch for most of the Houston metro area—with higher isolated amounts—and the potential for 2.0 or more inches north of Highway 105. Rains will generally end tonight or by early Tuesday. Lows Monday night should drop into the upper 40s away from the coast.

Tuesday

A colder day, with highs near 60. Winds will remain consistently out of the north at about 10 to 15 mph, but skies should begin to clear during the afternoon hours. With clearing skies, we can expect Tuesday night to be the coldest of the week, with lows dropping to around 40 degrees, give or take.

Wednesday and Thursday

The middle of this week looks pleasant, with highs in the 60s to 70 degrees and lots of sunshine. Lows by Thursday night probably will only drop into the 50s.

Friday

An atmospheric disturbance may lead to some increased rain chances as clouds return on Friday, but right now we’re not expecting to get too wet. Highs on Friday should be around 70 degrees, with a front pushing through overnight.

Saturday, Sunday, and beyond

Assuming the front makes it through as anticipated, this weekend should see mostly sunny conditions with highs in the 60s and lows in the 40s and 50s. At this point, the weekend does look rather grand for early spring so perhaps make some tentative outdoor plans now. We should see a warming trend heading into next week.

It was only about six weeks ago that some readers asked whether winter was over. This question came after a week of very spring-like weather in early January. Our advice at the time: “decidedly not.” Now that we are a little deeper into February, with March just around the corner, it is fair to revisit the question. And this time, our answer is a cautious “yes.”

We’ll loosely define winter as the period when there is a 30 percent chance, or less chance, of a freeze for the remainder of the season. For some locations in Houston, we’ve already passed that. For others, we’re quickly coming upon it. Based on data from NOAA, here is the date after which, historically, there is a 30 percent chance, or less, of a freeze occurring:

• Galveston Island: February 2
• Houston Hobby Airport: February 24
• Sugar Land: Feb. 28
• Sealy: March 1
• Houston Bush IAH: March 13

Looking through the first week of March, it appears there will be several nights in the 40s. But right now there is scant evidence of another widespread freeze in the Houston metro area. So if you live south of Interstate 10, I’d feel very confident in planting for the spring. I’d even feel moderately confident doing so north of the freeway, although I might cross a few fingers and toes.

Thursday

It’s gray and very warm across much of the region this morning, with low temperatures generally in the mid-60s. A weak front is pushing into Houston, and will likely stall near Interstate 10. Therefore, inland areas may see highs in the 60s, while closer to the coast you’re in the 70s today, with plenty of humidity. There will be some scattered rain chances, but anything that falls will be light. Lows tonight will drop into the 60s for areas ahead of the front, while some inland locations may see the 50s.

Friday

A secondary push of drier and cooler air will follow on Friday, and this may reach a little further into the Houston area. Temperatures are a total crapshoot therefore. As a best guess, if you live inland of Interstate 69, you may be in the 60s, but closer to the coast we’re probably looking at 70s and plenty of humidity. Very scattered, very light rain showers will be possible again.

Saturday and Sunday

The story of the weekend will be continued mostly cloudy skies and highs in the 70s pretty much area wide as the fronts wash out. Saturday night will be especially warm, only dropping into the upper 60s. The possibility of some scattered showers will remain, and on Sunday evening we may need to watch out for a few stray thunderstorms. Humidity will be in evidence throughout the weekend as well as the possibility of morning fog.

Next week

After another warm day Monday, a front should arrive on Monday night and this one should push all the way into the Gulf of Mexico. We still have some questions about how long the cooler, drier air will stick around, but I think it’s safe to say that most of next week should be back into nights in the 50s, or possibly 40s, which is more typical for this time of year.

Houston enjoyed a block of four solidly sunny, splendid days from Saturday through Tuesday in the wake of last week’s Arctic freeze. But now the sunshine party is over, with clouds and humidity taking its place. This is likely to remain the case for the next week or so. In the image below, an ensemble forecast for cloud cover, white denotes clouds and darker colors sunshine.

Wednesday

Lows this morning are starting out at about 60 degrees—a remarkable contrast to just eight days ago when the low was 13 degrees. Welcome to Houston weather.

Winds are now blowing from the south or southwest, and this will bring in additional moisture and humidity throughout the day. However, any rain showers will be very light, and very scattered. For the most part it will just be mostly cloudy skies, with temperatures warming into the upper 70s to 80 degrees. Lows tonight will again only drop to around 60 for much of the area, and the development of sea fog is very likely along the coast.

Thursday

A weak (and dying) cold front will sag into Houston after midnight, likely pushing to around the Interstate 10 corridor. This will bring better rain chances, but I still expect anything that falls to be light in nature, with accumulations of a tenth of an inch, or two.  This will lead to highs on Thursday in the 60s, with somewhat drier air for inland areas, and lower 70s closer to the coast, with more humidity. Lows Thursday night will depend on where you lie in regard to the front, and our best guess is shown on the map below.

Friday, Saturday, and Sunday

After the potential for some partly sunny skies on Friday afternoon, the weekend period looks to see continued warm and gray for the Houston region, with highs in the 70s, lows in the 60s, and a 20 to 30 percent chance of rain each day. So this will be the very definition of mild weather for Houston. One negative is the (very) likely development of sea fog as this warmer air moves over still much cooler shelf waters.

Next week

Most of the forecast model guidance is on board with a stronger cool front arriving later on Monday, or Monday night, which should usher Houston back into weather conditions more closely resembling late winter or early spring. Confidence in the front passage is not absolute, but I think next week will probably see daily highs around 70 degrees, lows in the 50s, and more sunshine.

It’s a rather chilly morning across the region, with temperatures falling from the mid-30s far north of Houston to the upper 40s right along the coast. However, these will be the last chilly temperatures that Houston experiences for awhile, and today will also probably be our last mostly sunny day until next week.

Tuesday

Some light sea fog will burn off fairly soon after sunrise, and temperatures will rise fairly quickly through the morning. High temperatures should reach the mid- to upper-70s across Houston with mostly sunny skies. Light winds will become more pronounced out of the south tonight, and temperatures will only drop into the upper 50s for most. These winds may help to work against the development of fog on Wednesday morning.

Wednesday

Increasing moisture levels will lead to a day of at least partly, if not mostly cloudy skies. Light, very scattered showers will be possible, but for the most part I think we’ll just see gray skies. High temperatures will likely reach the mid-70s. Overnight, a weak cold front will approach Texas, but most of the high-resolution modeling suggests it will stall out along Interstate 10, or just north of there. As a result, fog may be a problem for coastal areas for the rest of the week.

Thursday and Friday

Conditions toward the end of the week will depend upon which side of the front you find yourself. Highs along the coast will likely be in the 70s, and in the 60s for areas further inland. There will be decent rain chances on both days, but accumulations overall should be slight, measured in tenths of an inch.

Saturday and Sunday

As the front washes out, expect a warmer weekend for pretty much all of Houston—highs in the 70s, lows in the 60s, mostly cloudy skies and plenty of humidity. Perhaps a third of the area will see rain, again most likely in the form of light showers.

Next week

Our next chance of a front that makes it all the way to the coast comes about a week from today, and we should return to more normal conditions for this time of year by then.

Another arctic front?

There appear to be rumors spreading of another Arctic Outbreak moving into the greater Houston area during the first week of March. I’ve been asked about this multiple times on Twitter and in emails, so it must be circulating somewhere. I haven’t bothered to look. This rumor is not grounded in fact, however. While Houston may see some low temperatures in the 40s during the first week of March, I’d bet against anything lower. And I can definitively say we’re not going to see a repeat of what we saw earlier this month, with record lows and widespread snow and ice.