Eric Berger

In brief: Houston is likely to see its hottest weather of the year over the next couple of days. But after this, we should slowly start to cool down. Moreover, after a very dry month of August, rain chances should start to noticeably improve beginning this weekend or early next week.

August heat

We’re a little more than half way through August, and so far this month we’ve experienced four 100-degree days, and the lowest daytime high has been 94 degrees. Skies have been almost universally sunny, and many areas have experienced no rain. This is how it often goes in August, and our high temperatures for the next couple of days could be even hotter—many inland locations will reach the low 100s today and Tuesday.

However, over the course of this week we’ll see high pressure that has been anchored over West Texas begin to slide northward, and this will begin to ease the peak-summertime weather in Houston. High temperatures by this weekend should fall back into the mid-90s, and rain chances will start to improve this weekend or into next week. The details of all this are still somewhat in flux, but it’s likely that the end of August will feel different than the rest of the month.

Monday and Tuesday

There’s no way to sugarcoat this part of the forecast. With high pressure in place, today will see excessive heat with high temperatures in the low 100s for much of the region. These may well be the hottest days of this year, so please take heat precautions during the middle of the day. Skies will be mostly sunny with very light winds. There will be about a 10 percent chance of rain, as a few isolated showers may develop along the sea breeze. But mostly, these will be very, very hot days. Overnight lows will only drop to around 80 degrees.

Wednesday, Thursday, and Friday

These will also be hot days, but we may trend downward just a bit from the low 100s on Wednesday to upper 90s by Friday. Each day will also see a slightly better chance of rain, perhaps 20 percent, as there’s a little bit more activity due to increased moisture levels. Still, the overall pattern will be one of heat and sunshine.

Saturday, Sunday, and beyond

As high pressure eases off, I think most of the Houston metro area will see high temperatures dip back into the mid-90s this weekend. At the same time we may start to see the influence of low pressure from the Gulf of Mexico. I don’t know if rain chances will improve a whole lot this weekend, but at some point in the next week or 10 days, we’re likely to start seeing much better daily odds for rainfall. So for Saturday and Sunday I’ll say there probably will be some scattered showers and thunderstorms, with better chances for more coverage into next week.

Tropics

Hurricane Ernesto is in the northern Atlantic, and will pass not all that far south of Newfoundland today and tonight before it accelerates eastward across the open Atlantic. Beyond Ernesto, the tropics look to remain quiet for at least the next week.

In brief: Houston’s forecast remains more or less the same for the foreseeable future. We’re going to see blistering hot days, sultry and warm nights, and only very low-end rain chances for at least the next week to 10 days. So it goes in high summer in Houston, beneath high pressure.

August countdown

Today is August 15. There are 16 days and 17 hours until September 1.

Thursday

Skies will be mostly sunny today, with temperatures likely reaching the upper 90s for most of the Houston metro area. Winds will be light this morning, increasing to about 10 mph from the south later this afternoon. We will once again be on the lookout for isolated showers and thunderstorms, firing up along the sea breeze, later this morning and into the afternoon hours. Chances will be about 20 percent near the coast, and lesser for locations further inland. Lows tonight will only fall to around 80 degrees.

Friday, Saturday, Sunday, and Monday

It looks like our heat will peak this weekend, and into next week, when much of the city will likely hit triple digit temperatures. We’ll continue to see sunny to mostly sunny skies, with isolated afternoon showers and thunderstorms.

Later next week

It’s still going to be hot. But at some point next week we should start to come down slightly in temperatures, back into the upper 90s. Rain chances could become a bit higher as well, perhaps in the 20 to 30 percent range, during the second half of next week, but I wouldn’t bank on it. The ridge of high pressure just isn’t going to move a whole lot, so accordingly our weather isn’t going to change much.

The tropics

Ernesto has become a hurricane, and it is likely to become a major hurricane before reaching Bermuda this weekend. We have full coverage of this system on The Eyewall. Beyond Ernesto, the Atlantic basin continues to look quiet for the next week or possibly even 10 days. I’m not complaining.

In brief: Houston’s heat will continue to build this week, likely peaking with triple-digit temperatures this weekend across most of the metro area. Today’s post also reviews a recent report by the National Weather Service on winds and other impacts from Hurricane Beryl.

Hurricane Beryl’s winds

On Tuesday the National Weather Service issued a summary of findings on Hurricane Beryl, which includes official measurements of maximum winds, rainfall, storm surge, and more. This is the best data we are likely to get regarding the local meteorological impacts from Beryl, which made landfall south of Houston a little more than a month ago.

Of most interest is the winds from Beryl, as they were the cause of power outages to about 90 percent of customers in the Greater Houston area. A few days after Beryl’s landfall, Space City Weather published a post that said a region with a competent electricity distribution system should not have experienced such widespread outages. The new data supports this view. The highest sustained winds across the vast majority of the Houston area were in the vicinity of 40 to 60 mph, with gusts in the 60 to 80 mph range.

For much of Houston, especially the eastern half of the metro area, these winds were less than experienced during Hurricane Ike, in 2008. For example, maximum sustained winds during Hurricane Ike at Hobby Airport, in the center of the city, were 75 mph. During Beryl, maximum sustained winds were 54 mph. These were different storms, with different tracks, but it seems clear that our electricity distribution grid 16 years after Hurricane Ike is no stronger than than before. It is possibly even more vulnerable.

Beryl was not a pleasant event. Hurricanes never are. But we almost certainly will experience much worse wind storms in the coming decades. Will our electricity distributors, CenterPoint, Entergy, and Texas-New Mexico, be ready?

Wednesday, Thursday, and Friday

By now, you should know the drill. For the rest of the week we’re going to see mostly sunny days with temperatures in the upper 90s. We’ll continue to see some spotty rain chances during the late morning and afternoon hours as the sea breeze pushes inland. If I’m being generous, I’ll say there’s a 20 percent chance of such showers near the coast, and perhaps a 10 percent chance inland of Interstate 10. Consider yourself fortunate if you get a splash of rain to help the trees and briefly cool down the air. Winds will be light in the morning, before blowing from the southeast at about 10 mph by the late afternoon hours. Overnight lows will only fall to about 80 degrees.

Saturday and Sunday

The temperature dial gets turned up higher for the weekend, with much of the area reaching 100 degrees. Rain chances also fall back to near zero, as high pressure strengthens and promotes sinking air. This probably will be the hottest stretch of summer—no guarantees, sorry—so let’s all get through this together. We’re about a month away from the time when we might realistically begin to hope for fall’s first front.

Next week

The overall pattern does not change much next week, at least as far as I can see. Temperatures may fall a few degrees, back into the upper 90s. But it’s still going to be hot and sunny, with warm and sultry nights. Rain chances look low.

Tropics

Ernesto is approaching hurricane strength as it lifts away from Puerto Rico. It may well become a major hurricane before seriously threating the island of Bermuda on Friday or Saturday. Elsewhere the tropics are blissfully quiet for mid-August, and look to remain so over the next week at least.

In brief: We saw some isolated showers and thunderstorms on Monday, and this pattern is likely to repeat itself on Tuesday. However, for the most part we’re looking at hot and sunny weather, and temperatures are likely to increase a bit further for the weekend. This will be a weekend to find some water in Texas.

Tuesday

On Monday a few, isolated areas saw some fairly decent showers. A location along the North Freeway, just south of Aldine, picked up half an inch of rain. A rural area southeast of Alvin picked up nearly three quarters of an inch. The vast majority of Houston, however, may have heard some distant thunder but picked up no rain at all.

So it will go again today, as atmospheric moisture levels are fairly high, but we’ve got generally sinking air due to high pressure. This limits shower activity. However the spark today, like on Monday, will be the sea breeze pushing inland during the late morning and afternoon hours. This will again produce some spotty showers and thunderstorms. I would peg chances at about 20 percent for locations south of Interstate 10, and 10 percent further inland.

Why have I spent two paragraphs talking about a 20 percent chance of rain? Because there’s absolutely nothing else going on with our weather this week except for heat. For the most part we’re going to see hot and sunny weather, and temperatures should reach a crescendo this weekend. Highs today will be in the upper 90s, with lows tonight only dropping to about 80 degrees.

Wednesday through Friday

This pattern will continue, with hot and mostly sunny days in the upper 90s to 100 degrees during the afternoon hours. A few isolated showers will be possible along the sea breeze. Winds will be from the south or southeast at 5 to 10 mph, with slightly higher gusts possible during the afternoon or early evening hours.

Saturday and Sunday

The weekend looks very hot, with temperatures of 100 degrees, to the low 100s, for nearly all of the metro area away from the immediate coast. Skies will be sunny.

Next week

If we look further out, by Tuesday or Wednesday of next week temperatures may come down slightly. But only slightly. And at this point I’m not really seeing any indications of meaningful or widespread rain on the horizon.

Tropics

Tropical Storm Ernesto formed on Monday, and it is moving toward Puerto Rico in the next day or so. Longer term it should become a hurricane and eventually threaten Bermuda. It will not be a player for the mainland United States. Beyond Ernesto? I don’t want to taunt the tropics, but things look to remain quiet for a spell through the middle of August. Fingers crossed.