Eric Berger

Well, so much for the high pressure that was supposed to tamp down on rain activity Thursday. Despite the influence of a ridge to the west of the region, some pretty strong showers still popped up over Houston, dropping as much as 1.5 inches near the Waller-Harris County line Thursday. I think we’ll be in for a similar pattern this weekend in which perhaps only 30 to 40 percent of the Houston area receives rainfall in any given day, but those areas that do see showers could experience some briefly heavy rainfall. Welcome to the game of rainfall roulette.

Friday

Mostly sunny skies this morning should allow temperatures to push up into the low- or even mid-90s by early this afternoon, and this will be warm enough to help generate some scattered showers and thunderstorms.

High resolution modeling suggests these storms will initiate around 2pm or 3pm and then wane by or before sunset with the loss of this daytime heating. Rainfall could be briefly heavy under some of these storms, potentially making something of a mess during the evening commute. However, we don’t have any flooding concerns beyond the usual mess on streets. Lows Friday night should fall into the mid-70s.

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It has been a wet week for much of coastal Texas, with the combination of moist air moving inland, and the absence of high pressure to keep rainfall at bay. The Valley was hit especially hard, with areas near Harlingen and McAllen receiving in excess of 10 inches and experiencing some pretty significant flooding. Closer to home, parts of the coastal Houston region saw 3 to 5 inches of rainfall. We’ll now mostly dry out for a few days before the potential for some heavier rain returns early next week.

Thursday

Today should see the return of mostly sunny skies to Houston, although we can’t entirely rule out the possibility of a few isolated, pop-up storms. But for the most part, we’re just going to see a warm, June summer day with highs in the low 90s and moderate southerly winds. Overnight temperatures may lower into the mid-70s—if you’re lucky, and live far enough away from the coast.

Friday

This should be a similar day to Thursday, although we’ll probably see rain chances on the order of 10 to 20 percent, again in the form of some pop-up showers. Otherwise, expect mostly sunny skies with highs in the low- to mid-90s.

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Good morning. The radar is a bit quieter this morning, so before jumping into the forecast I wanted to note a dubious record the city set last weekend. According to World Climate Service on Twitter, Saturday was the most humid day on record at Houston’s Bush airport (which has recorded hourly data since 1969), with an average hourly dewpoint of 79.7 degrees Fahrenheit. The four days from June 20 through June 23, in fact, ranked as four of the top six spots for daily mean dewpoint in Houston. As a reminder, here’s how Matt recently characterized dewpoints, and how they feel:

• 70s means uncomfortable, or typical summer
• 60s means humid, but not terrible
• 50s means mostly comfortable
• 40s or less means very comfortable or dry

Now, on to the forecast.

Wednesday

In case you were wondering, dewpoints this morning are generally in the low 70s. We’re going to see another day with scattered, daytime showers across Houston. Accumulations should be less than Tuesday, but we can’t rule out some areas seeing a 1 inch or so of rainfall, with a higher bullseye under the slowest-moving storms. Most of the area will probably see 0.25 inch or less. Highs will get up to around 90 degrees, although local temperatures will depend upon the extent of sunshine your area receives. High pressure should begin to build in this evening, shutting down rain chances area-wide.

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Storms are firing again this morning, primarily to the south and east of Interstate 69, where a few areas have already picked up 1.5 inch of rainfall. We’re going to remain in a pattern where there is the potential for storms through the next 12 to 24 hours before higher pressure returns to the area until the weekend.

Tuesday

Overall, our atmosphere should remain moist for pretty much all of today, with precipitable water values of 2 inches or greater, meaning it won’t take too much of a spark to generate showers and thunderstorms. This pattern will allow for the development of on-and-off showers, moving generally to the east-northeast. Unfortunately, storm movement will be fairly slow, which will allow for some areas to see totals of 1 to 3 inches, and some street flooding. Although the rain has developed near the coast this morning, various models show the potential for development at most any location later today. Clouds and intermittent showers should help keep highs in the upper 80s for most of the region.

Wednesday

Pressures begin to build, and this should help to limit storm activity. However, with a still-moist atmosphere, I think at least about 30 percent of Houston should see at least some brief showers. Highs will get into the low- to mid-90s, as some sunshine returns.

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