In brief: Today’s post discusses the possibility of thunderstorms with a front on Friday night, folllowed by a cooldown that will stick around for awhile. Winter, it seems, really might be here. Also, start line conditions for the Houston Marathon are the best I can recall.
Storms possible Friday night?
Houston’s weather has been mostly calm for awhile now, beyond the very warm conditions we have experienced since early December. However there is a slight chance of some severe weather on Friday night as a fairly robust cold front passes through. We will have a decent amount of shear available, but I just don’t think the overall background conditions will favor widespread, severe weather. So yes, some scattered thunderstorms are likely on Friday night (perhaps around midnight in central Houston), but I don’t expect much more than that.

Thursday
We’re experiencing less fog this morning across the region, and that’s largely due to more pronounced southerly winds. They’re currently blowing at 10 to 15 mph, and we may see some stronger gusts up to 30 mph this afternoon. Skies will be mostly cloudy, but since the air mass moving in from the south will be warm and muggy, I still expect some parts of our area to hit 80 degrees. A few scattered, and light showers will also be possible today. Lows tonight will be very warm for January, in the upper 60s.
Friday
Rain chances improve on Friday, likely to about 60 percent for most locations. We will probably see scattered showers during the daytime. It is possible that a more organized line of showers and thunderstorms will develop later on Friday evening, and pass through Houston during the overnight hours. We’ll see. Regardless, temperatures on Friday will be warm and muggy, likely pushing 80 degrees. By Saturday morning we should be in the mid-50s, with much drier air moving in.
Saturday
This will be a breezy, and much cooler day with temperatures reaching only about 60 degrees during the afternoon. Skies will be mostly cloudy as well, adding to the chill feeling. A chance of showers may linger during the morning hours. Gusty winds from the north may reach 25 mph, or perhaps even a bit higher, before calming some Saturday night. Lows will drop into the mid-40s in Houston, with cooler conditions for outlying areas.

Sunday
I was chatting yesterday with a friend and fellow runner, and we agreed that conditions for the Houston Marathon are the best they’ve been in memory. Start-line temperatures will be in the 40s, with a modest northerly wind (probably 10 mph). Humidity will be very low, with partly to mostly cloudy skies. Rain should not be a factor. And temperatures by late morning likely will still only be in the 50s. So now is the time to go for those personal records!
Anyway, for non-runners, we can expect highs by Sunday afternoon to reach about 60 degrees. Sunday night will be quite cold, with lows in Houston dropping to 40 degrees, with mid- to upper-30s for outlying areas. Far inland locations, such as College Station, Huntsville, and elsewhere may see a light freeze.

Next week
Winter should stick around through next week, with highs mostly in the 60s, and lows in the 40s. We may see some rain chances on Tuesday or Wednesday as a reinforcing front moves through, and then again next weekend. The details, as always, are fuzzy at such a distance.
