In brief: After enduring one of the longest, strongest late season heat waves on record in Houston, we will begin to slowly reduce heat after today and tomorrow. Look for slightly “less hot” weather next week and an opportunity at a weak cool front. We’re also watching the tropics but are not currently too worried about what develops near the Yucatan as it pertains to Houston.

We hit 98 degrees yesterday officially in Houston, our seventh straight day above 95 degrees that began on September 13th. In the history of Houston’s weather records back to the 1880s, a one week stretch above 95 degrees has not ever occurred after September 13th. We had a couple five day stretches back in 2011 and late last September but never a week. If you’re like me and hate September because it only teases and never delivers autumn in any lengthy fashion, then this stretch of weather inspires much loathing. It’s just that it hasn’t been this hot for this long this late in the season before in Houston. We may make a run at an eighth straight day of this today, but the good news is that change is on the horizon.

Today through Sunday

Today and tomorrow should be similar in nature, with highs generally in the mid-90s, give or take, with limited rain chances. We will probably get the same out of Sunday, though it may be a degree or two cooler. It should still be above 90 though. Morning lows should be stable, generally in the mid-70s. If you’re out for a morning walk, it’ll really depend on exactly when you step outside. Either way, it will be quite humid.

Next week

I get the sense that next week is the week we really start to transition to autumn. It won’t be cool and refreshing by any means, but we will see high temperatures shave off a degree or two each day. We’ll start the week on Monday likely in the low-90s and finish the week in the upper-80s. Morning lows will go from the mid-70s Monday to the low-70s by Friday.

The Weather Prediction Center’s forecast map for next Wednesday does show a cold front pushing into our area. This won’t be a sudden ultra-refreshing change, but I think this will reinforce this idea of a slow drift back toward “less hot” weather next week. With high humidity early in the week and an approaching front there will be a slight chance of showers each day, especially south and east of Houston. But meaningful rain seems unlikely next week.

Tropics

Yesterday evening I pushed a post out at our companion site, The Eyewall to discuss the latest on the Caribbean disturbance we expect to try to develop next week. In the post, I included a section about Texas and why I don’t believe this one is our storm. Meteorologically, the setup is such that whatever it becomes should move very slowly in the southern Gulf or near the Yucatan for several days before eventually getting scooped up by a trough in the Eastern U.S. and whisked off to the northeast. Overnight modeling did nothing to dispel that thinking on my end, so I’ll refer you to the post yesterday to get a better understanding of why we’re not currently too worried. That said, we’ll keep monitoring things this weekend and have the latest for you on Monday, assuming this remains likely to stay away. We will also update The Eyewall this weekend with more. For those of you with travel plans next weekend in that region, you’ll want to keep tuned in.

In brief: Houston’s weather should begin to cool off slightly after two hot days, and then some real change may arrive next week. We’re still not certain about the timing of one or two fronts, but it does seem probable that relief is eventually coming. We also discuss an area of low pressure in the Caribbean Sea that should eventually become a tropical system.

Thursday and Friday

If you came to this forecast hoping to see some immediate change from the heat we’ve seen of late, you’re out of luck. For the last six days Houston has recorded high temperatures of 96 or 97 degrees at Bush Intercontinental Airport, and that trend is going to continue through the end of the work week. We are looking at high temperatures generally in the mid-90s the next couple of days, with slightly higher readings further inland, and slightly cooler near the coast. Skies will be mostly sunny, winds will be light, and nights warm. We did see some isolated showers pop up near downtown on Wednesday, so while rain chances are very low, they’re not zero. We’re looking at 5 to 10 percent chances of a rogue shower, probably.

Saturday and Sunday

More sunshine, but as high pressure starts to weaken we should see slightly cooler daytime temperatures. Much of the Houston region will probably be in the low- to mid-90s during the daytime, with nighttime temperatures falling into the mid-70s. There is a slight chance of some rain showers near the coast. The bottom line is that if you have weekend plans outdoors, you should be good to go—with proper hydration.

Next week

Here’s where things begin to get a little more interesting. High temperatures will start the week in the lower-90s, but as high pressure backs off even further we’ll see the atmosphere open up a little more to the potential for some rainfall. We’re still probably talking only 20 to 30 percent chances each day, but there will also be some clouds mixed in with the sunshine.

By Thursday or Friday there is a chance that a weak front pushes into the Houston area. At this point it’s difficult to be sure this happen, but my sense is that we’ll see a very slight reduction in temperatures and some slightly lower humidity. A stronger push of cooler and drier air could happen next weekend, which may drop nighttime lows down into the low- to mid-60s. This is far enough out that I don’t have super-high confidence in this scenario, but there is a fair amount of support in the ensembles at this point. Fingers crossed.

Tropics

The National Hurricane Center has increased the likelihood of a tropical depression or storm forming in the Caribbean Sea during the next seven days to 40 percent. This is the area we’ve been talking about for several days now. It’s likely that something will eventually develop, but whether it stays mired in the Bay of Campeche, or eventually lifts north into the Gulf of Mexico remains an open question. Where it goes will, to some extent, be determined by the fronts I discussed above. Matt did a nice job of discussing this uncertainty, and why we just don’t have confidence in any scenario, here. The only thing to do is continue to watch it, and not get fixated on any single model run. They’re still bouncing around like crazy.

Note

I wanted you to know that I’ve got a new book coming out next Tuesday. I’m mentioning it here because I worked really hard to write a compelling tale. REENTRY tells the story behind the story of SpaceX’s Falcon 9 rocket—from its first launches, landings and failures, to ultimate success—as well as the Dragon spacecraft. You can buy the book anywhere, but if you want a signed and personalized copy you’ll need to order from a Houston-based store, Blue Willow Bookshop, by Friday afternoon. Here’s the link.

In brief: Houston’s heat continues, with daily highs in the mid-90s for the rest of the week. We’ll cool down ever so slightly this weekend, and low-end rain chances return next week. We’re also keeping a wary eye on the tropics, as the Caribbean Sea stirs.

A note on the Moon

Last evening, if you were outside looking up, you may have noticed a full Moon. It looked pretty spectacular. However you may have seen a bit of blurring or dimming at the top of the Moon. This was, in fact, a partial lunar eclipse. Only about 8 percent of the Moon’s surface was covered before Earth’s shadow started to recede. I apologize, if I had realized this was occurring in advance, I would have noted it in yesterday’s post.

Wednesday, Thursday, and Friday

Yes, I’m lumping all three days together because they’re all going to be very similar. Each day will have high temperatures in the vicinity of the mid-90s for most of Houston, with slightly cooler daytime temperatures on the coast. Skies will be partly to mostly sunny, with generally light winds from the southeast at 5 to 10 mph. Lows will only fall into the upper-70s. Rain chances are effectively zero, although we cannot rule out a very isolated shower here or there.

This is probably the warmest weather we’re going to see for the rest of this year, so if you like the heat, enjoy. And if you prefer somewhat more temperate temperatures, well, hold on for a little while longer.

Saturday and Sunday

More of the same, however as high pressure weakens a bit we could see daily temperatures slide down by a couple of degrees. Overnight lows, too, could drop into the mid-70s. Skies will be mostly sunny, with low- to non-existent rain chances.

Next week

Temperatures look to remain in the low 90s next week, with partly to mostly sunny skies. Rain chances continue to look fairly low, but may rise to the 20 or 30 percent range by Tuesday or so, with similar daily odds for the remainder of the week. As we get closer to next weekend it looks like we could see some kind of front, perhaps backdooring in from the northeast, but there’s not certainty in the models yet. So we can have some hope for a cool front with some drier air about 10 days from now. But for now, all it remains is a solid hope.

Tropics

The National Hurricane Center has started to highlight an area in the Caribbean Sea that we’ve been talking about for a couple of days. It still appears as though development will be slow, with nothing forming for at least the five to seven days. If a tropical low does develop—and there is no certainty at all that it will—all of our best models are pretty well divided on what will happen in terms of where it goes. For us along the upper Texas coast this is probably not something to be too concerned about. However, given the high uncertainty we’ll just have to see what happens.

In brief: Houston will continue to see unseasonably warm weather, with high temperatures in the low- to mid-90s for most locations. The sunny pattern continues this weekend, with more late summer weather. There is the possibility of a cool front in about 10 days, but it is far from locked in. We also discuss potential tropical activity in the Caribbean Sea next week.

Tuesday

With high pressure in place, you pretty know what to expect with Houston’s weather this week, which is plenty of heat, humidity, and sunshine. High temperatures reached 96 degrees on Monday at Bush Intercontinental Airport, and that’s a good predictor of what will happen today, with mostly sunny skies, and light northeasterly winds. Rain chances are essentially zero, but there is a very slight chance of some brief showers along the sea breeze. Low temperatures tonight will drop into the mid- to upper-70s for much of the region.

Wednesday, Thursday, and Friday

More of the same. We’re going to see sunny and hot weather for the remainder of the work week. Need I say more?

Saturday and Sunday

The pattern continues into the weekend, however as the intensity of the high pressure system wanes some we’ll see a slight moderation in temperatures. Don’t expect much, but daily highs could drop into the low-90s, with plenty of sunshine. Nighttime lows may fall into the mid-70s. Skies still should remain partly to mostly sunny, with very low rain chances.

Next week

There’s not a whole lot of change next week, with fairly warm temperatures. Perhaps we’ll see slightly better rain chances to start next week, in the vicinity of 20 or 30 percent, I’m not sure. Some of the global models are indicating that a front may arrive by around Thursday or Friday of next week, but the signal is not yet strong enough that I’m buying it. However, it is possible. We’ll see.

Tropics

A tropical system that has been absolutely soaking North Carolina has finally moved inland. Beyond that there’s not much to note that is presently active. However, most of our modeling guidance continues to highlight the western Caribbean Sea as a location where we can expect to see the development of a tropical low in about a week or so.

Beyond that there is not much sensible to say. This system could then track into the Yucatan Peninsula or turn north toward Florida or the eastern Gulf of Mexico. Yes, it could even move toward Texas, but at this point there is little model support for such an outcome—especially if the aforementioned front materializes. Nevertheless, at this time of year in the tropics we watch everything.