A big cooldown comes Sunday, and our first look at Christmas weather

Good morning. Fog lies across much of the area this Houston morning, and the entire metro region is under a Dense Fog Advisory through 10 a.m. Aside from that conditions are just sticky for mid-December. Will they remain that way through Christmas? I’ll discuss.

Today

Conditions will remain mostly cloudy today, and warm, with highs in the mid-70s before the passage of a cold front sometime this afternoon or evening. Some light, scattered rain showers are possible. The front should allow temperatures to fall into the upper 50s tonight for most inland areas, with slightly warmer temperatures along the coast.

Wednesday and Thursday

As light northerly winds bring in drier air, Wednesday should be partly to mostly cloudy, with highs near 70, and overnight lows around 50 degrees. As cooler air continues to move in Thursday may only reach about 60 degrees under mostly sunny skies. The cold front’s effects will be brief, however, as onshore winds resume sometime later on Thursday.

Friday and Saturday

Warm (for December) and muggy weather returns to Houston to end the week, with highs in the mid- to upper-70s on Friday and Saturday, and warm nights. Both of these days should be mostly cloudy, gray, with a chance of light rain and possibly a few thunderstorms. Rain accumulations don’t look impressive, but there should be enough moisture to put a damper on some outdoor plans.

The GFS model (of dewpoint temperatures) shows the forecast position of the front at midnight, as Saturday becomes Sunday. (Weather Bell)

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Spring, already? Not quite, but this week will be a bit warmer

After three days of brutal, winter-like conditions, spring has arrived in Houston for another year. I kid, of course, but it sure is warm out there to start this week.

Today

Lows have only fallen into the mid- to upper-60s across Houston this morning, and some light rain and fog has developed ahead of a weak cool front that’s now moving through the region. This front is likely to stall along, or just off the northern Texas coast. With light northerly winds most areas should see partly to mostly cloudy skies today, with highs of around 70 degrees. Lows tonight will fall down to around 60 degrees.

Tuesday

As the front meanders back inland, Tuesday should see temperatures in the low 70s, along with some scattered, light rain. Fog will be possible in the morning with this moisture before mostly cloudy skies later in the day. The weak front finally gets pulled back east, off the coast, allowing temperatures Tuesday night to fall into the upper 50s for inland areas, and lower 60s along the coast.

Despite some on-again, off-again light rain this week, forecast accumulations through Sunday are slight. (Weather Bell)
Despite some on-again, off-again light rain this week, forecast accumulations through Sunday are slight. (Weather Bell)

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Summer finally ends, winter definitively begins

Summer, which began March 13th with a high of 87 degrees and remained persistently alive through the sultry months of September and October, died on Thursday morning of winter-like causes. She was eight months old.

Today

It kind of feels like summer finally died, right? With the forceful arrive of a cold front early this morning, Houston has definitely moved into a winter-like pattern. Highs this morning in the mid-50s will slowly fall throughout the day, and gusty winds will blow all day. Harris, Fort Bend and Wharton counties, as well as those counties immediately along the coast, are under a wind advisory through 6pm CT with gusts up to 35mph possible.

Tonight Houston faces the possibility of its first freeze. Harris and inland counties are under a freeze warning tonight from midnight through 9am. A freeze is most likely for those north of a line from Katy to Spring, but please remember there are a lot of factors at work here. The potential for some clouds, and moist ground (which will retain some warmth) may mitigate against the possibility of a freeze for these areas. In any case, tonight will be the region’s coldest since last winter.

Friday morning's freeze possibilities. (National Weather Service)
Friday morning’s freeze possibilities. (National Weather Service)

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Strong winds likely Thursday as a “real” front moves into Houston

Good morning. Cool ground and calm winds are producing some patchy fog across the Houston area near Galveston Bay and a few other locations. This should persist until 8 or 9am CT this morning. On a related note, Matt and I want to wholeheartedly thank all of the supporters who bought t-shirts to support the site, and made donations to support our work. The fundraiser was a tremendous success. Look for your t-shirts to arrive a few days before Christmas.

Today

Expect mild conditions today, with partly to mostly cloudy skies and high temperatures in the upper 60s. With only a modest amount of moisture pooling ahead of a strong cold front, conditions won’t be ideal for rain showers this evening and during the overnight hours, and most areas probably will only see a tenth of an inch, or two.

Wednesday night and Thursday

A cold front racing across the plains states today should reach northern parts of the Houston area before or around midnight, and sweep through the city and be off the coast around, or shortly after sunrise Thursday. We’re going to wake up to blustery, cold conditions with temperatures generally around 50 degrees, and feeling quite a bit colder due to winds gusting to about 30mph for inland areas, and up to 40mph along the coast. Highs Thursday are unlikely to top 50 degrees and will fall during the afternoon hours.

Dewpoint gradient on Thursday morning, from negative numbers on the upper plains to the 60s along the Texas coast. (Texas Tech)
Dewpoint gradient on Thursday morning, from negative numbers on the upper plains to the 60s along the Texas coast. (Texas Tech)

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