Year: 2020

The meteorological phenomenon we call “August” has mostly lived up to its normally unpleasant expectations so far in the Houston area. After hitting 101° on Wednesday, we topped off at 99° yesterday. Overnights have been especially oppressive, with Galveston tying an all-time record warm low temperature on Wednesday and Hobby Airport blowing through its record for most 80 degree mornings in a year already. We will have a post with a lot more on this coming soon. In the meantime, we expect no relief this weekend, but there are signs we should begin to cool off a bit next week. Let’s discuss.

Today through Monday heat

A heat advisory continues for the entire region both today and tomorrow, and we would not be shocked to see it extended into Sunday and/or Monday as well. Expect mostly sunshine with highs near 100, lows in the 70s to near 80°, and heat index values of 105° to 110° or even briefly hotter at times.

Take it slow and easy in the heat this weekend.

Rain chances and a front next week?

As far as rain chances go, we should not see anything other than an isolated pop-up shower or storm today and tomorrow. If the chance of a shower is about 10 percent Friday and Saturday, maybe it inches up to 15 or 20 percent Sunday.

Monday and Tuesday are complicated by a cold front in the area. Don’t expect anything refreshing next week, but we should see a shift to “less hot” weather and a better chance of scattered showers and storms early. Monday would still be hot with scattered showers and storms in the afternoon. The trade off with a cold front possibly pushing through is that rain chances would drop off again behind the front for later Tuesday and Wednesday. Still, we’ve got a few things to work out regarding the timing of the front and just how high rain chances look. We’ll update you Monday.

Behind any sort of front, we would see high temperatures “only” in the mid-90s and less oppressive heat index values. Lows would be more in the 70s for most.

Tropics

Tropical Storm Josephine formed yesterday in the open Atlantic, the earliest 10th or “J” storm on record by almost 10 days.

Josephine will likely begin to get steered to the north as it passes the islands and is no threat to the U.S.

The only other disturbance outlined by the National Hurricane Center (Invest 96L) is a disturbance off the North Carolina coast that will slide out to sea over the next few days. We expect another wave or two to emerge next week as candidates for development, but it’s far too early to speculate on any other details. We just know it’s likely going to get and stay active.

For those of you scoring at home, the earliest eleventh, or “K” storm was Katrina on August 24, 2005. The earliest “L” storm was 1995’s Luis on August 29th, part of a barrage of storms in the Caribbean islands that year.

Our forecast is going to be very hot, with heat advisories likely needed through the weekend. Before jumping into the details, such as they are, I wanted to say a word about Hurricane Ike.

We are, amazingly, coming up on the 12th anniversary of Hurricane Ike. If you don’t remember, the storm hit Houston fairly hard, but made landfall just far enough east of Galveston that the worst of its storm surge missed Galveston Bay. It represented an enormous wake-up call for the region in terms of vulnerability of coastal residents, as well as the Houston Ship Channel. Unfortunately, while we have studied the problem in depth, we have yet to commit to any major projects that would address the threat and mitigate surge. There are two main proposals: A Coastal Spine Project led by the U.S. Army Corps of Engineers and the General Land Office, and an astonishingly beautiful Galveston Bay Park that would protect the Houston Ship Channel from a 25-foot storm surge.

While we certainly realize that America and Texas have a lot of other problems to deal with at present, it is time to pick one, or both, of these projects to move forward with for the good of the greater Houston region. Otherwise, we may not get so lucky with the next large hurricane that makes landfall along the upper Texas coast.

Thursday

Houston’s high temperature hit 101 degrees on Wednesday at Bush Intercontinental Airport, and we can probably expect more of the same today with mostly sunny skies. The National Weather Service has issued a heat advisory for now through Friday evening, and in truth it probably will be extended through the weekend as high pressure continues to influence our weather. Southwest winds of 5 mph will provide very little cooling today. Nights will remain sticky and warm.

Friday, Saturday, and Sunday

More. Of. The. Same. It’s probably worth mentioning that we could see a few isolated showers pop up during the afternoon, with daytime heating. I’d sure welcome one, but it seems a forlorn hope at this point.

Next week

The heat should back off somewhat by Tuesday, as some sort of weak cool front approaches the area. We still don’t have great confidence in how far this front will reach, but it should help to increase rain chances by Monday night or Tuesday, and then knock back daytime highs into the low- or mid-90s. We’d love to get some dry air to help with nighttime temperatures, but I’m not ready to bet on that yet.

Good morning. Temperatures will be hot enough today that the National Weather Service has issued a heat advisory for now through 7pm CT. This means the hot temperatures and humidity will combine to create a heat index of up to 110 degrees later today. We can probably expect more of the same for the remainder of the week as high pressure influences the region’s weather through the weekend. Some relief should come next week.

Wednesday

High temperatures today will likely reach near 100 degrees for inland areas, with lower-to-mid 90s along the coast. Expect mostly sunny skies, although there will be a slight chance of showers and thunderstorms later this afternoon. Winds will be light, at 5 to 10 mph out of the southwest. Our trend of warm nights will continue, with many areas south of Interstate 10 not falling below 80 degrees tonight.

Thursday and Friday

With conditions more or less the same for the remainder of the work week, I’d anticipate the National Weather Service extending heat advisories for both of these days.

Saturday and Sunday

We don’t really anticipate much change this weekend, either, with only slight—roughly 20 percent—rain chances both days. Otherwise skies should be partly to mostly sunny, with highs in the upper 90s to possible 100 degrees for inland areas. Overnight lows will provide scant relief.

Next week

Things may get a little more interesting next week as high pressure backs off some. Rain chances may increase by Monday or so, perhaps into the 30 to 40 percent range. And I’m not ready to fully buy into this yet, but the models bring a front into Texas and push it toward Houston on Tuesday or Wednesday of next week. The jury is out on how far the front will push into Houston, and whether it will make it all the way to the coast. Typically this does not happen in August, but if it does we’ll see some pleasantly drier air. We’re not going to get crazy here, but instead of nighttime temperatures of around 80 degrees, they may drop into the lower 70s in the city. We’ll see.

Welcome to mid-August. We’ve passed the first couple of months of this hurricane season in the Houston area without too much heartburn. The good news today is that we don’t have much specific on our radar that is of concern for the Gulf. The bad news is that we are anticipating that by late August there will be multiple areas to watch.

Tropical outlook in a sentence

A disturbance that may develop in the Atlantic is not a concern for us at this time, however we see signs on models that multiple tropical waves will be worth monitoring heading into late August.

Invest 95L

The disturbance in the Atlantic that is the most pressing at the moment is tagged as Invest 95L. It’s pretty far out there still, about 1000 miles west of the Cabo Verde Islands, or a little short of halfway to the Caribbean.

As of Tuesday morning, the National Hurricane Center says it has a 90 percent chance of developing into a tropical system over the next two to five days. On satellite today, 95L has a decent area of thunderstorms associated with it, but it seems to lack any kind of organization at this point.

The window for Invest 95L to develop is fairly narrow. We expect whatever it becomes to run into some serious wind shear as it moves toward the Caribbean. In addition, the system should be steered west around high pressure in the Atlantic, with a weakness in that ridge allowing it to gradually gain some latitude. We feel that will be enough to either allow for an escape out to sea or to dissipate the system well before it gets to the U.S., and we probably wouldn’t register this as something you need to worry about for the moment.

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