Eric Berger

In brief: We’re experiencing a chilly morning, and we have one more cold night before we enter a generally warmer pattern. In addition to a mostly spring-like forecast, today’s post includes some musings on the passage of winter, into spring, into summer in Houston.

Thoughts on spring

Last night, a little after 10 pm, I let the dogs out for the final time before bed. As I stood in the dark, enjoying the quietude, I heard it. That characteristic zing of a June bug kamikazeing into the back door. It was the first of the season here, the first of what surely will be thousands over the coming weeks. In Houston, June bugs come in March. It is the way of things, the rite of passage from winter to spring to finally summer.

You can see it in the trees as well. Only a few days ago, leaves were still falling from the trees in my backyard. Now, it is pollen. There is so much pollen. It is the price we pay for shade in the summertime, and a price I will gladly pay. But do you know what did not fall from the tress this year? Acorns. By my fallible memory, we have had two mast years within the last half decade, when the acorns dropped from the trees for weeks on end, carpeting lawns and creating seas of seeds. There seemed to be billions of them. This year, I think I saw maybe one or two. Should we worry about the squirrels?

It is a time to think about such things. Planet Earth spun through the spring equinox this morning at 4:01 am local time. It’s OK, I didn’t wake up for it either. It just means the Sun is directly over the equator today, and that its light is shining equally on both the northern and southern hemisphere of the planet. Although by some definitions the spring equinox marks the beginning of spring, in our area spring more typically runs from late February into the middle of May.

After that, of course, comes summer. But on such a pleasantly crisp morning as we have today, there is no need to think about that quite yet.

Thursday

Temperatures have fallen to about 50 degrees, or a tad cooler, this morning under the influence of cool and dry northerly winds. Dewpoints are exceptionally low. Because of this, and ongoing winds of 10 to 15 mph, and higher gusts, the region will fall under a ‘red flag’ warning this afternoon from 1 to 7 pm. This means that wildfires could spread quickly. Highs this afternoon will reach the upper 60s for most locations under perfectly clear skies.

Winds will be subsiding later this afternoon, and early evening, if you’re headed out to the Houston rodeo. Temperatures will be in the mid-60s before the show, falling to the upper 50s afterward. So, slightly chilly. Low temperatures tonight will fall into the 40s for much of the Houston metro area. This may be the final night in the 40s for many locations this season, but there’s enough spring left in the calendar where I would not want to say that definitively.

Friday

This will be another sunny day, but temperatures will be warmer, in the mid-70s. We’ll also see those northerly winds swing around to come from the south, perhaps gusting up to 20 mph or so during the afternoon hours. As a result, lows on Friday night will only drop into the upper 50s.

Saturday

The first half of the weekend has no weather concerns, aside from some southerly winds gusting up to 20 mph or so. We’re going to see highs of around 80 degrees, with mostly sunny skies. With a warmer flow in place, lows on Saturday night will only drop into the mid-60s.

Sunday

Clouds should start to build on Saturday evening or night in response to increasing moisture levels in the atmosphere. Sunday looks to be a warmer, more humid day in the 80s. The region will see the potential for some light showers during the afternoon ahead of an advancing cold front. It’s a weak front, but it still could spark some scattered thunderstorms on Sunday night. Overall rain accumulations look fairly low for most locations, on the order of a tenth of an inch of rain, or two.

Next week

Monday is likely to be cooler as a modest amount of drier air filters in from the northeast. Let’s call it mid-70s, with the possibility of nighttime temperatures in the 50s. Most of the rest of next week should see highs in the 80s with lows in the 60s. There is a decent signal for rain showers from Wednesday night through Friday. An inch or so of rain sure would help us out, but it’s too far out to have absolute confidence in any such forecast. We’ll see.

In brief: A robust front will bring much drier air into the Houston region today, and a couple of chilly nights in the upper 40s. After that Houston will likely experience warmer weather for the rest of March: think 80s with some humidity rather than the 70s we’ve had for much of the month. Summer is not here, but it is on the horizon.

Wednesday

Temperatures across much of the metro area this morning are in the range of 65 to 70 degrees, which is rather warm for mid-March. It’s also fairly sticky outside. However, this will end later this morning, as a fairly strong front moves into the area. We’ll feel this both in the form of northwesterly winds, gusting up to 20 or 25 mph, as well as much drier air. As skies clear out later today, with the drier air, expect high temperatures in the vicinity of 80 degrees.

Unfortunately for rodeo-goers, those winds will not let up much this evening. In fact, they should peak during the overnight hours, perhaps gusting up to about 30 mph. So be prepared for that. Temperatures after the show will be in the 60s, before lows tonight ultimately drop into the mid- to upper 40s for much of the metro area away from the coast.

Thursday

This will be a sunny and pleasant day, with low humidity and highs of around 70 degrees. During the morning hours, at least, we should still see some modestly gusty winds. However by the afternoon these winds will likely slacken. Thursday night will be chilly again, with much of the region likely dropping into the upper 40s. Will this be the last time that parts of the Houston region get into the 40s this season? I think that’s quite possible.

Friday

Expect a sunny, pleasant day with highs in the mid-70s. Winds will turn southerly, gusting at times up to 20 mph. Expect overnight lows to only reach about 60 degrees with the warmer, southerly flow.

Saturday

The first half of the weekend brings more sunshine, with highs around 80 degrees. Dewpoints should still be in the 50s, so it will not feel too humid outside. Yet. Lows on Saturday night only drop into the mid-60s.

Sunday, Monday, and next week

With a more humid flow, expect temperatures to reach into the lower- to mid-80s on Sunday with likely increasing cloudiness. The question then is to what extent a slug of drier air will slide down from the northeast into the region. This is known as a “backdoor” front because instead of blowing down from the northwest, it edges in from the northeast. It’s likely that this system will generate a decent chance of rain, perhaps on the order of 50 percent during the period of Sunday afternoon through Monday morning. Accumulations don’t look that high, probably on the order of tenths of an inch.

Temperatures on Monday and Tuesday will depend on the extent to which the backdoor opens, and the amount of cooler and drier air that moves in. Perhaps we’ll have a couple of days in the 70s, with lows in the upper 50s. Maybe it will be a tad warmer. Most of the rest of next week should see highs in the 80s, however, with a decent amount of humidity. So it goes in Houston as we get nearer the end of March: fewer fronts and more humidity.

In brief: Expect winds to whipsaw across Houston for the next few days as we go from a southerly flow to a northerly flow and back to a southerly flow between now and Friday. Overall, temperatures continue to look mild, with Thursday looking to be a splendid day.

Tuesday

Low temperatures have only fallen to about 60 degrees this morning, and we are going to see warmer weather for a couple of days. The southerly flow will be especially pronounced today, with a tight pressure gradient causing winds to reach sustained levels of about 20 or 25 mph, with gusts up to 40 mph this afternoon. Highs will reach about 80 degrees this afternoon, with a few clouds developing later today.

If you’re headed out to the rodeo, you’ll want to hold on to your hat. Look, I realize I’ve already used that joke this year, but it’s been windy, ok? Although winds may slacken just a bit, they’re still going to be pronounced this evening, along with temperatures in the 70s. The influx of moisture will help keep overnight lows in the upper 60s.

Wednesday

Wednesday morning will be fairly warm and humid, with mostly cloudy skies. Winds should also have finally died down. But it won’t last as a front sweeps in from the northwest during the late-morning hours, likely reaching the coast around noon or shortly after. There is the barest chance of some rain along with the front on the east side of Houston, but I expect a dry passage for nearly all of us.

Highs will be in the upper 70s with sunny skies during the afternoon. And the winds—they’ll have reversed direction, and we can expect gusts of around 20 mph during the daytime, increasing to about 30 mph on Wednesday night. This will create “red flag” conditions for at least western areas of the region, meaning the winds and dry soils will be conducive to wildfires. With the drier air, lows will drop to around 50 degrees on Wednesday night in Houston.

Thursday

This looks to be a splendid day, as it lies in the period between a frontal passage and the return of the onshore flow. Look for highs of around 70 degrees, light winds, sunny skies, and low humidity. Lows on Thursday night will again drop to around 50 degrees in Houston, with cooler conditions for inland areas.

Friday

Another sunny day, with highs in the low 70s. However we’ll likely see some modestly strong southerly winds. Lows only drop into the lower 60s with the warmer southerly flow.

Saturday, Sunday, and beyond

After temperatures mostly in the 70s this week, this weekend and beyond will likely see a warmer pattern, with highs in the lower 80s. We may see one or two weak fronts in the extended forecast, but overall, we should see warmer days and mild nights. Alas there is not a huge signal for rainfall, which we could use right now.

In brief: This week will bring plenty of sunshine and wind as the region veers through spring. Highs most days will be in the range of 75 to 80 degrees, with some particularly nice weather expected on Thursday. The first half of the weekend looks sunny, but we could see some clouds by Sunday to go along with some slight rain chances.

Spring-time winds

The wind we experience at the surface is due to air moving from high pressure to low pressure, and the bigger the difference, the greater the breeze. During the summer in Houston, we often talk about the sea breeze. This is because the air over land heats up faster than water during the daytime, lowering the air pressure at the surface. (Warm air rises). Since the air pressure is lower at the surface over Houston, air moves in from the Gulf.

The winds we experienced on Saturday, as a cold front moved in, were different. They were moving from north to south, following the influx of a low pressure system (front) at the surface. The more rapid the pressure change, the stronger the wind. This is what we mean by a “tight” pressure gradient. I bring all of this up because we’re going to see several “tight” gradients this week that will lead to winds whipsawing back and forth across the area.

Monday

Sunday was an absolutely gorgeous day in Houston, certainly a top-10 day of the year. Monday will be similar, although not quite as nice (in my opinion, of course). Highs today will reach about 80 degrees with plenty of sunshine, but this will be marred by southerly winds of about 10 to 15 mph, with gusts up to 25 mph this afternoon.

If you’re heading out to the Houston rodeo this evening, or celebrating St. Patrick’s Day elsewhere, we have no weather concerns aside from the breeze. Temperatures this evening will be in the lower 70s, with clear skies. Lows will be in the upper 60s after the show, and with the warmer southerly flow we probably will only drop to around 60 degrees in Houston overnight. Some inland locations will be cooler.

Tuesday

This should be another mostly sunny day, with high temperatures near 80 degrees. But as the pressure gradient tightens, we’ll see some fairly strong southerly winds at 20 mph, with gusts up to 30 or possibly even 35 mph. This southerly flow will bring humidity back into the region, and give us a warm night in the 60s with increasing cloud cover.

Wednesday

High temperatures on Wednesday should reach around 80 degrees, or even a bit higher in Houston. This is because a cold front is likely to pass through the area during the late morning hours, bringing in drier air (which heats up more efficiently). Expect northwesterly winds during the afternoon, gusting up to 20 or 25 mph. Lows on Wednesday night will be around 50 degrees.

Thursday

At this point, Thursday looks to bring exceptional weather back into the forecast, with highs in the 70s, sunny skies, and light winds.

Friday

By Friday we’ll probably see offshore winds kicking back up, so expect a breezy day in the 70s with rising dewpoints.

Saturday, Sunday, and beyond

What does the weekend hold? Saturday should be mostly sunny, with highs of around 80 degrees. With a southerly flow in place expect a warm night, with lows in the 60s. As for Sunday, I’m a little less certain. We should see more clouds, highs around 80 degrees, and with increasing moisture there’s a possibility of some showers. (We could use some rain, but this isn’t going to do much to address drying soils I’m afraid). It’s likely that a weak front pushes into the area on Sunday night or Monday, but I’m not confident in the details.