Unsettled, uncertain weather ahead for Houston

Good morning. The cold front watch continues for Houston, but alas there’s still no certainty about what lies ahead. One thing we can have some confidence in is a return to a more rainy, unsettled pattern this weekend.

Today

With some moisture returning to the area we can expect to see some isolated to scattered showers later today, along with still very warm temperatures in the low 90s. Very summer-like.

Friday and Saturday

More moisture will flow in off the Gulf of Mexico, and at the same time the ridge of high pressure that pushed temperatures up this week is going to move off, opening up the possibility of more widespread showers and thunderstorms. I’m not expecting anything too intense, and most areas will probably see a few tenths of an inch of rain, or less. Highs will be around 90 degrees, under partly sunny skies, with lows in the upper 70s.

Sunday and Monday

A large trough of low pressure, along with a cold front at the surface, is going to move into Texas on Sunday (west Texas) and Monday (most of the rest of the state). With moisture still flowing into the state from the Gulf of Mexico, this front could generate a lot of rain—perhaps as much as 10 inches for some areas along the I-35 corridor (heads up, Dallas), or just to the west of it.

The European model's depiction of the front's location on Monday evening.  (Weather Bell)
The European model’s depiction of the front’s location on Monday evening. (Weather Bell)

See full post

About that possible cold front next week…

We’re still about five days away, so the forecast is far from clear. However, both the GFS and European model forecasts that have come out this afternoon show a strong front arriving in Houston on Monday night or Tuesday morning.

This is not a stone cold lock. But it is the time of year when we would expect our first front to arrive, and the upper atmosphere is favorable for a low-pressure system to move into Texas early next week from the northwest. And, at least for now, the global forecast models show this front moving all the way into Houston (the GFS) or, even better, off into the Gulf of Mexico (the European model).

This dewpoint forecast for Tuesday morning from the GFS model shows the front pushing into Houston. (Weather Bell)
This dewpoint forecast for Tuesday morning from the GFS model shows the front pushing into Houston. (Weather Bell)

See full post

Houston enduring its longest period of warm nights on record

Here’s a sobering statistic as we get deeper into September: Houston’s streak of “warm” nights is unprecedented. According to MDA Weather Services, the city’s run of nights 72 degrees, or warmer, is unprecedented in the period since 1889. It has now extended to 101 days (102 if we include Tuesday). In other words, we haven’t been below 72 degrees since June 10:

(MDA Weather Services)
(MDA Weather Services)

 

Unfortunately we are likely to extend this dreadful record for at least a few more days. However, there is still some modest hope of a cool front next week.

Today

With slightly drier air moving into the region we should see a mostly sunny day today, with highs in the low 90s, and lows in the mid-70s. Rain chances are near zero.

Thursday and Friday

The onshore flow resumes tonight, which should push humidity levels back up and return a chance of rain back into the forecast by Thursday. We should see a couple of partly to mostly sunny days to end the week, with highs around 90 degrees or slightly above. Scattered, strong thunderstorm development will be possible, especially during the afternoon hours. I’m not expecting anything scattered or too widespread, however.

Saturday and Sunday

The weather seems likely to be unsettled during the weekend, with ample moisture and the potential for some atmospheric disturbances to move into the region.

National Weather Service forecast for rain totals through the weekend. (Weather Bell)
National Weather Service forecast for rain totals through the weekend. (Weather Bell)

See full post

Houston’s Summer-tastic September continues

Summer continues, with a high temperature of 96 degrees on Monday, and more heat ahead. According to the National Weather Service, through Sunday, Houston Intercontinental’s average temperature of 84.1 degrees is 2.8 degrees above normal, and tied for the 3rd warmest such period on record (1st place is 84.8 degrees in 1995). Houston’s Hobby Airport has had its second warmest start to September ever.

But wait, there’s more.

Today

Another hot one. While we can’t rule out some isolated rain showers this afternoon, like we saw on Monday, most of the area will see mostly sunny skies. Temperatures should again rise into the August-like mid-90s. Brutal.

Wednesday

Some drier air will move into the state from the northeast later on Tuesday. While this is technically a “front,” we’re not going to see much of a cool down. But at least there will be a little less humidity for a day or so. Under sunny skies we should see highs in the low 90s, and lows in the lower 70s. Rain chances are near zero.

Thursday and Friday

As high pressure continues to retreat we’ll see a break from the really excessive heat, and should fall back into a late summertime pattern. That means highs around 90 degrees, lows in the mid-70s, and a chance of sea breeze-driven showers during the late morning and afternoon hours. Shouldn’t be too bad.

Saturday and Sunday

The weekend is still in flux. It appears as though we’re going to see a healthy amount of moisture flowing in from the Gulf of Mexico, but there’s some question as to how much of a forcing there will be to drive that moist air upward, and produce some rain showers and thunderstorms. I think it’s reasonable to expect a good 30 to 50 percent chance of rain, with highs around 90 degrees.

National Weather Service rain accumulation forecast for now though the weekend. (Weather Bell)
National Weather Service rain accumulation forecast for now though the weekend. (Weather Bell)

See full post