Eric Berger

Houston’s warmest June ever is going to end much cooler than it started. With an increase in cloud cover, and at least decent daily rain chances, the next four days will generally see high temperatures of only around 90 degrees, give or take. The bigger question remains rain totals as a low pressure system approaches the Texas coast. Between now and Saturday I would expect 0.5 to 2 inches of rain for inland areas north of Interstate 10, and 1 to 4 inches for areas closer to the coast. But there will be wide variability across the region, and a lot still depends upon the movement of the tropical low over the next few days.

Wednesday

The aforementioned low pressure system is a couple of hundred miles due south of the Texas-Louisiana border this morning, over the Gulf of Mexico. And that’s where the bulk of the rainfall is, offshore. Still, we’ve seen coastal areas getting clipped by rains moving inland early this morning, and that could happen again this afternoon and early evening. If you live inland, north of Interstate 10, rain chances are less today, but not zero. Highs will generally reach the low 90s, beneath mostly cloudy skies. But if some sunshine pokes through this afternoon, a few locations could reach the mid-90s. Light winds (except in thunderstorms) will shift from the northeast to southeast later today, and rain chances may slacken over night.

Thursday and Friday

These two days still look like the best time for moderate to heavy rainfall to fall along upper Texas coast. This is when the tropical low pressure system—which has a 40 percent chance of becoming a tropical depression, the National Hurricane says—should come onshore somewhere along the middle Texas coast. Again, the most favored regions for heavy rainfall will be coastal counties, including Matagorda, Brazoria, and Galveston. However, the best chance for inland rainfall will also come on these days, as the tropical system marches inland. Our rainfall totals will ultimately depend on whether the system makes a northward jog, in which case some coastal areas could see 5+ inches. At this point, we just can’t say for sure.

The increased cloud cover and widespread rain should help to keep temperatures in check, with daily highs perhaps not making it beyond the upper-80s for a lot of locations. Enjoy the reprieve from the heat, which we certainly earned after a torrid June.

Saturday, Sunday, and Monday

For many this will be a holiday weekend. It is looking like we’ll see a carryover of rain chances into Saturday morning, but at some point they’re going to end and our skies will likely turn sunnier. Highs on Saturday will be around 90 degrees. Sunday looks partly to mostly sunny, with highs in the low 90s, and the Fourth of July should see partly to mostly sunny skies with highs in the mid-90s. We can’t entirely rule out a fleeting shower on these days, but I’d put the chance down in the 10 percent range. Note that while Harris County Commissioners did vote to enact a burn ban on Tuesday, fireworks will remain legal in the unincorporated part of the county.

Next week

Most of next week will likely see highs in the mid-90s, with mostly sunny skies, and precious few rain chances. So be sure and top off over the next several days, if you can.

Good morning. Houston remains on track for a decidedly cooler and wetter week, with the major question facing us being how much rain the region will receive. For now, I’d expect most locations in the Houston metro area to pick up 1 to 3 inches between now and Friday. The higher end totals, generally, will come near the coast, with lower-end accumulations for inland areas north of Interstate 10.

But there remains a lot of uncertainty as a broad area of low pressure moves westward across the Gulf of Mexico, toward the Texas coast. Given this, the region could see quite a bit more rain, or rain totals could underperform. If you’re wondering about the holiday weekend, sunnier and hotter weather should return by Saturday or Sunday, ahead of the Fourth of July.

Tuesday

The cool front that moved through on Monday and generated showers and thunderstorms for parts of the metro area has moved offshore, and that’s where the bulk of the rain will fall today. I expect inland rain chances of only about 10 to 20 percent, with slightly higher chances right along the coast. Skies will be partly to mostly cloudy today with highs in the low- to mid-90s, and light northeast winds.

Wednesday

Rain chances start to tick upwards on Tuesday night into Wednesday as the aforementioned low-pressure system in the Gulf of Mexico starts to slowly approach the Texas coast. Still, I’d only peg rain chances at about 50 percent for the coast, with diminishing chances for inland areas on Wednesday. Again, the bulk of the rainfall should remain offshore. Look for high temperatures in the low 90s and mostly cloudy skies, with light northeasterly winds turning easterly.

Thursday and Friday

This is when the potential for heavy rainfall will peak. The key questions are where the tropical low pressure system goes, and whether it gets organized into a tropical depression. The low itself is likely bound for the south or central Texas coast. If it organizes sufficiently, this would tend to bring the heaviest bands of rainfall closer to the center of the storm, and south of Houston. If the low remains disorganized, the potential for heavy rainfall would cover much of the Texas coast, including the Houston metro region. As of this morning, the National Hurricane Center is giving the system a 30 percent chance of developing into a tropical depression or storm. Regardless of what happens, we do expect to see at least some precipitation as the upper Texas coast will fall on the eastern, or “wetter” side of the storm. The question, again, is how much.

High temperatures will depend on the extent of rain, so look for anything from the mid-80s to 90 degrees on both days, with mostly cloudy skies.

Saturday and Sunday

For now it appears as though the low and its attendant rainfall will be largely gone by the weekend, setting up a pair of partly to mostly sunny days with highs in the low- to mid-90s. I’m not ready to rule out rainfall, given the uncertainty over the next couple of days, but chances are probably in the 20 percent range, especially after Saturday morning.

Next week

By the Fourth of July, on Monday, I am reasonably confident that we’ll see mostly sunny skies and highs in the mid-90s. This is fairly typical weather for early July. Such conditions should prevail for most of next week.

Tropics

Beyond the Gulf of Mexico there is a lot going on in the tropics for late June, but none of this is a direct threat to Texas. Matt will have a full rundown for you in a tropics update later today.

Good morning. Houston has been exceptionally hot and dry—in terms of rainfall, not humidity—for the last four weeks. Our weather has largely been dominated by more or less intense ridges of high pressure. This week there will be two features driving up our rain chances, and bringing temperatures more in line with the “early summer” period.

The first feature is a cool front that will move down to the coast and stall today. Then, by the middle of this week a low pressure system over the gulf of Mexico should approach the Texas coast. This will bring a fair amount of rain to coastal areas of the state, but it remains to be seen whether the bulk of that rainfall drops over the Houston metro area, or further down the coast.

Finally, a quick note to App users: We have fixed a bug that did not display the latest posts. Please download the latest version to fix this, and thank you for your patience.

Monday

For a change, skies today will be partly to mostly cloudy, and this should hold high temperatures to the mid-90s. The front will bring scattered showers to areas primarily north of Interstate 10 later this morning and during the afternoon, with the focus shifting to the coast this afternoon and evening. Stronger storms, generally, will be more likely near the coast. I think about 40 percent of the area will see rainfall, with a few isolated areas picking up an inch or so, and most of the rest a tenth of an inch or two. Winds will be out of the west this morning, turning to the northeast after the front’s passage. Lows tonight will drop into the mid-70s.

Tuesday

Skies will be partly sunny on Tuesday, with highs likely only reaching about 90 degrees. Rain chances look pretty low for inland areas, but for locations south of Interstate 10 I think there’s perhaps a 20 or 30 percent chance of rain. Light northeast winds will shift to come from the east.

Wednesday, Thursday, and Friday

As noted in the introduction, our weather during the second half of the work week will largely be determined by the movement and strength of a low-pressure system over the Gulf of Mexico. There remains only a small chance this system, presently south of Louisiana, will develop into a tropical depression, so the primary weather we’re going to see from it is rainfall. At this time Matagorda Bay seems a more likely bet for the heaviest rainfall than Galveston Bay, but this system will be bringing a lot of atmospheric moisture to the coast, so we will see.

What we can say is that Wednesday, Thursday, and Friday all have the potential for moderate to heavy rainfall, and that chances of this are significantly higher if you live near south of Interstate 10, and even better the closer you live to the coast. I’d guess areas south of Interstate 10 end up seeing 1 to 4 inches of rain this week, and areas north 0.5 to 2 inches. However, this is a dynamic situation and forecasts will change. Highs will range from the mid-80s to 90 degrees depending on cloud cover and rainfall.

Saturday, Sunday, and July 4th

The weekend looks warmer and sunnier, with highs perhaps in the low- to-mid-90s and diminishing rain chances. At this point the Fourth of July holiday looks to be hot and mostly sunny, but there are no guarantees this far out.

Tropics

Beyond the weak Gulf system, there are two other tropical waves worth watching. The area in red, Invest 94L, looks to be bound for Central America. The other wave’s track is less certain, but at this time I don’t think it’s a threat to the Gulf of Mexico either. For now, therefore, our focus will remain closer to home.

We’ve been mentioning the possibility of some elevated rain chances beginning on Monday of next week, and now the forecast is coming into slightly better focus.

A surface cold front will move off the northern Gulf coast into the Gulf of Mexico this weekend, and once there it may find favorable conditions for some kind of development. We think it probably will remain a low pressure system, but there is a chance it could become a tropical depression or even less likely, a tropical storm.

Given the steering flow at present in the Gulf of Mexico, and retreating high pressure over Texas, this low-pressure system will most likely track westward across the Gulf. This would bring increasing rain chances to the upper Texas coast, including Houston, beginning later on Monday and through Wednesday. I must stress that at this time these rains look nothing but beneficial for our parched region.

Accumulations are nearly impossible to forecast given the uncertainty at this point, but I’d guess most of the Houston region will receive 0.5 to 3 inches of rain, with a greater likelihood of rain near the coast. By Tuesday the increasing cloud cover should also drive daily temperatures back to around 90 degrees for a couple of days. Eventually this system should move west, clearing our area by later on Wednesday or Thursday.

As ever, tropical systems are dynamic, so we’ll be watching this closely. If the situation changes, we’ll update you on Sunday. If not, look for our regular post on Monday morning.

App note

We’re aware of an issue with the Space City Weather app in which it is not displaying the most current posts on some devices. Our developer has identified the bug and is working to push out an update soon. Please accept our apologies for the issue.