Relentless Texas heat continues and will worsen again next week

Through June 10th, Houston had experienced our coolest June since 2017, with a chance to perhaps outpace that year too. Since June 10th and through yesterday, it has been the third hottest mid-June stretch on record. When all is said and done, this will end up being one of our hottest Junes on record. We are firmly in it over the next week.

Today

I am not prepared to say that our rain chances are over with just yet. There are storms offshore of Louisiana this morning, along with a couple clusters of storms riding the periphery of the heat ridge over Texas.

Storm clusters riding the periphery of the heat ridge over Texas may lead to some showers and storms, mainly east of I-45 today. (College of DuPage)

As those clusters drop south and east, complex interactions with lingering boundaries from storms in recent days could yield at least a few new storms, mainly east of I-45. I think that’s the exception, not the rule and that the intensity of the storms will (hopefully) be much less than seen the other night. So don’t bank on storms. But just know there’s a chance.

Outside of that, more of the same: Clouds, sun, a heat advisory that could be upgraded to an excessive heat warning, and plentiful humidity. Highs will be in the upper-90s.

Saturday & Sunday

Hot. Highs near 100, lows near 80. Rain chances decline to near zero.

No relief is expected through next Thursday. (Weather Bell)

Next week

We will escalate the heat daily until about Wednesday or Thursday, when things should peak. This will push us into the low-100s for highs, with lows again near 80. While humidity doesn’t look *as* high as this past week’s heat, it will likely be high enough, along with slightly less wind to lead to another round of potential Excessive Heat Warnings.

Wet bulb globe temperature is another measurement of heat stress on the body that we can use to assess the seriousness of a heat wave. In this case, it will be at “extreme” levels this weekend and next week (Weather Bell)

When we look at the wet bulb globe temperature forecast for Houston we see extreme values continuing, much like this past week. Heat index basically factors in humidity and temperature to give us a “feels like” value in the shade. Wet bulb globe (WBGT) factors in things like latitude and date to generate sun angle, wind speed, and cloud cover, in addition to temperature and humidity to generate a measurement of heat stress in the sun. What I like about WBGT is that it’s sort of a universal measurement. Once above 90, that poses extreme stress on your body, whether in Houston, Miami, or Phoenix. Houston would typically be in the moderate to high level of WBGT this time of year, so the fact that we’re in “extreme” levels speaks to how abnormally hot this is for us.

A long way of saying: Take it easy on yourself. Go slow. Drink water. Maximum heat precautions need to be fully implemented over the next week.

Hopefully the “death ridge” responsible for this heat shifts into the Desert Southwest next weekend or the week of July 3rd. Should that happen, perhaps we can resume more typical summer weather here in Houston, which while still certainly hot, would be a little less stressful on our bodies.

Last chance for rain and storms this evening before high pressure asserts control again

Good morning. After Wednesday evening’s surprise storms, the majority of power outages reported due to damaging winds has dropped considerably as crews have worked overnight. The main area of concern remains in Montgomery County, where about 25,000 customers remain without power. Workers in those areas should have calm conditions as they continue to assess the situation and make repairs.

In the big picture, high pressure has edged slightly off to the west, and this will leave us open to the potential for another round of storms later today, and help keep temperatures slightly cooler. This reprieve will not last, however, and the majority of next week looks sunny and very, very hot.

Thursday

Mostly cloudy skies this morning should give way to partly sunny skies this afternoon, and most of the area should reach high temperatures in the mid-90s. That’s not the heat we’ve seen in recent days, but it’s still quite hot. The bigger question is whether we see the development of storms again later this afternoon and evening.

High temperatures will generally be in the mid-90s today. (Weather Bell)

Conditions are marginally supportive of this, but the convective models don’t appear too excited about the potential for storms this evening. But they weren’t yesterday, either, with similar conditions in place. So what happens? I think we’ll see another storm system dropping out of the north this afternoon, but it probably will be weaker and make less of an impact than the one on Wednesday. Otherwise, expect low temperatures generally in the upper 70s.

Friday

High pressure begins to asset itself by Friday once again, so we’re going to see sunnier skies and highs in the mid- to upper-90s. After a lingering chance of showers early on Friday morning, the rain should be done. I’d peg overall chances at about 10 percent.

Saturday

Skies will be sunny again for the start of the weekend. Temperatures will not be super hot, but still in the upper 90s.

Sunday

The second half of the weekend does look super hot, with much of the region hitting 100 degrees. We may start to see excessive heat warnings again by this point.

During the middle of next week high pressure will firmly establish itself over Texas. (Weather Bell)

Next week

The bad news is that most all of next week looks really hot, with highs staying up around 100 degrees. The state is simply going to bake as a really stout high pressure system establishes itself over Texas. Rain chances will be near zero. There remain some hints in the models that this pattern will finally start to break next weekend as the high retreats west, but as we’re talking about a forecast about 10 days from now my confidence is still somewhat low. But I’m hopeful.

Surprise! Heavy rains, strong winds came early to Houston on Wednesday evening

Not going to lie, we did not expect this to happen this evening. A storm system that developed near the Dallas metro area on Wednesday afternoon moved quickly southward, pushing through the Houston metro area during the late evening hours. To our surprise, instead of weakening as this system pushed southward, it maintained its intensity.

As of this writing nearly 100,000 customers are without power in Montgomery County, and nearly 240,000 in Harris County. This is mostly due to the very strong wind gusts that accompanied these storms. An unconfirmed wind gust of 97 mph was recorded at Bush Intercontinental Airport as this line of storms passed through. To be clear, these winds were wholly unexpected even as of a few hours ago. I’d expect it to take at least a few hours for crew to get out and about and address fallen trees and other issues.

Yes, that’s a wind gust of 97 mph at Bush IAH this evening. (National Weather Service)

On the upside, the system dropped 0.5 to 1.0 inch of rain across much of the area, which was badly needed after 10 days of sunshine and hot weather. Temperatures have also dropped below 75 degrees across most of Houston, a place they’ve not been in more than a week. I realize that is no small comfort if the power dropped out at your house this evening.

In terms of the near-term forecast, once the storms pass through your area this evening, that’s probably it for tonight. Tomorrow morning looks fairly calm, and we’re probably looking at high temperatures in the low- to mid-90s. At this point I’d expect storm chances to start spinning back up in the afternoon hours, probably peaking again during the early evening. Hopefully we can nail that forecast a little better for you in tomorrow morning’s post.

Now I’m going to go back to my late dinner—of humble pie.

Today is the summer solstice, and it will sure feel like it—but Thursday could bring some rain showers

Good morning. The Sun reaches its northernmost extent today in the sky, giving those of us in the northern hemisphere our longest daytime of the year. For today, sunrise came at 6:21 am, and sunset is not until 8:25 pm. More precisely, our day length will be 14 hours, 3 minutes, and 31 seconds. That’s in contrast to our shortest day of the year, on the winter solstice in December, when the day lasts just 10 hours, 14 minutes, and 2 seconds.

We’re going to feel every minute of that sunshine today, with one more particularly scorching day. However, we will see a brief reprieve to end the week, with some healthy (and much needed) rain chances tomorrow. Let’s discuss below.

NOAA rain accumulation forecast for Thursday. I’m not sure we’ll see this much, but it will be our best chance for rain for a long time. (Weather Bell)

Wednesday

Skies will be partly to mostly sunny today, with highs again reaching near if not above 100 degrees. However, we’re going to see high pressure start to retreat slightly, and this will open the door to a slight chance of showers and thunderstorms this afternoon. Don’t get too excited. We’re talking about 10 percent. But those odds will improve on Thursday. Lows on Wednesday night should drop into the upper 70s.

Thursday

This will be the most interesting day of the week, weather-wise. With high pressure taking a break, we should see showers and thunderstorms developing to the northwest of our region, around the College Station area, before sunrise. Then a broken line of showers should move through during the morning hours. It’s impossible to say whether you’re going to see rainfall. I’d rate chances at about 50 percent, and these showers will likely be hit or miss, with a few areas seeing in excess of 1 inch, and others seeing nothing. On average chances should be better north of Interstate 10. Skies will turn partly sunny, with highs in the mid-90s.

Friday

This will be the second of our “cool” days this week. Look for highs in the mid-90s again, with mostly sunny skies. Another round of morning showers is possible, but overall chances will be much lower, in the vicinity of 20 percent.

Saturday and Sunday

Sunny and hot conditions return for the weekend, with highs of 100 degrees, as the dome of high pressure builds back over Texas in a big way.

Abandon all hope ye who enter here. (Pivotal Weather)

Next week

Not much to say, I’m afraid, other than that the heat remains in a pretty big way. There is some hint in the models that this pattern may finally break about 10 days from now, but that’s far enough into the future that my confidence in that is pretty darn low.