I was pleasantly surprised to be wrong on Tuesday night. I expected mostly cloudy skies to preclude local sightings of the full Moon—dubbed a supermoon by some because it is the closest full Moon of 2020, about 7 percent larger than a regular full Moon. However skies for the first couple of hours after sunset were clear, affording an amazing view of our heavenly companion. I hope you were able to enjoy it as well.
Wednesday
Skies are mostly cloudy this morning, with warm temperatures in the mid-70s. A few very scattered, light showers are possible before noon, but we should see some partial clearing of our skies this afternoon. This, in concert with a strong southwesterly flow aloft, will bring the region’s warmest day of the week. Depending on how much sunshine we see, highs will range from the mid-80s to low-90s across the region. Clouds should build again during the overnight hours, with another warm night in the 70s.
Areas at risk for severe weather on Thursday and Thursday night. (NOAA)
Thursday
This has the potential to be a more dynamic day, with an approaching cold front. This front, in concert with a disturbed upper atmosphere, will bring a healthy chance of showers to the region, along with a slight chance of severe thunderstorms and possibly hail. In terms of timing, my best guess right now is the afternoon through Thursday night, but hopefully we’ll get some clarity on this over the next 24 hours. In any case, Thursday will be cloudy, with highs in the 80s. The front arrives during the overnight hours.
Good morning. Houston is headed toward a period of three very warm days before somewhat more moderate temperatures this weekend. But in case you feared that spring has entirely fled the region, we are reasonably confident that a fairly strong outbreak of cooler weather will arrive next week. Texas will mostly lie in the southern periphery of much colder temperatures for the United States, but we should still see a few nights in the 50s—and I’m not ruling out the 40s, either—about a week from today.
Next week should be significantly cooler than normal for much of the continental United States. (Pivotal Weather)
Tuesday
This morning is starting off foggy, but this should burn off by around 9am. After the fog goes away we’ll be left with a mostly cloudy and warm day. Winds at the surface will be light, out of the south or southwest, but if we go a little higher in the atmosphere we can see a pronounced southwesterly flow. This movement of warmer air into the region (see satellite image from early this morning below) will really help drive warmer temperatures. Highs Tuesday should get into the mid- to upper-80s, and overnight lows are unlikely to drop below 70. Rain chances are near zero.
False color satellite image from early Tuesday. (NOAA)
Wednesday
After a cloudy start, we expect some sunshine to break through on Wednesday afternoon. With partly sunny skies, we probably will see high temperatures nudge up to near 90 degrees, if not hit that plateau. Expect another warm night.
Good morning. All in all, it ended up being a pretty darn nice weekend in Houston. On Friday and Saturday, much of the region got 1 to 2 inches of rainfall. We haven’t talked about it too much here, but the rainfall was really needed with much of the region under a moderate-to-severe drought (see below), and more warm weather on the way. Then, Sunday, was a pleasant spring-like day with a cool start and more sunshine that we originally expected. So, all-in-all, a good couple of days.
Drought conditions in Texas. (U.S. Drought Monitor)
Monday
The weak front that pushed into Houston this weekend is pulling back to the north, and this will help introduce a slight chance of showers into the forecast today. But mostly, skies will simply be cloudy, with rising humidity levels, and temperatures near 80 degrees. Winds will turn from the north to southeast throughout the day, remaining fairly light. Don’t expect much of a cool down Monday night, as insulating clouds and the warmer flow will keep lows at about 70 degrees.
Tuesday
This day will be a lot like Monday, albeit a few degrees warmer, with highs edging into the mid-80s. Again, we’ll see the possibility for some scattered showers and thunderstorms in the absence of high pressure. Expect another warmer night.
Rainfall has been a challenge at times since late 2019 across the area. We are finally beginning to transition into true spring here, and April showers will bring most of us a decent helping of rain over the next few days.
I’m going to do this post a little different than we usually do today, partly to make it easier to explain what we’re watching and when.
Quick synopsis
Today: Showers and thunderstorms develop north and west of Houston. Severe weather is possible west of our area, with lower chances as you get closer to the Houston Metro.
Tonight: Showers and storms drop south and east into the Houston area this evening. Some storms could be strong to severe, especially west of Katy or Cypress. Heavy rain is possible, mainly early.
Saturday: Showers and thunderstorms possible at any time through the day, possibly most concentrated near sunrise and again in late afternoon. Heavy rain possible, especially south of Houston. Severe weather is not likely. Cooler.
Saturday night: Showers and thunderstorms possible, mainly in the evening hours, diminishing overnight.
Sunday: Showers possible, but likely a much calmer day.
Severe weather
Now, we’ll walk you through the various concerns of this event. Let’s start with the severe weather aspect, because that seems to be what we get the most questions about. The Storm Prediction Center has highlighted areas mainly northwest of Houston today for the risk of severe storms.
Severe weather, especially large hail or strong wind gusts will be most likely toward Austin or San Antonio today. Some of those storms could get into western parts of the Houston area by evening. (NOAA)
The highest risks today will likely be 1.) hail and 2.) wind. Storms will be capable of some big hail, especially as you go west of Houston and closer to San Antonio and south of there toward Laredo. Strong wind gusts will be possible if the storms can organize more into “lines” at some point, and I expect that would be the primary thing to watch for the west side of Houston. We could see a line of storms approach by evening, which would be capable of those strong winds. As severe weather events in Houston go, this one doesn’t look especially serious, but as always, it’s something we will monitor.
Heavy rainfall/flash flooding
It is no secret that it has been dry in parts of our area in recent months. This is especially true as you go south and west of Houston. While Houston has seen roughly 50 to 75 percent of normal rainfall in 2020, places like Victoria and Corpus Christi have seen even less, more like 25 to 50 percent of normal. Thankfully, that provides us a little padding to absorb some of the initial heavy rains from this event. In general, heavy rainfall is likely in spots this evening, especially north of I-10 and west of I-45 initially. That could transition a bit south and east of there as the evening goes on, but storms would likely begin to weaken and rainfall rates should slow a bit. We should be able to handle today and tonight’s first wave with nothing worse than some minor street flooding or ponding on roadways.
Total rainfall by 7 AM Saturday should be heaviest off to the north and west of Houston, with some places south and east seeing little to no rain by this point. (Weather Bell)
Overall, rains should slow overnight and possibly fizzle out as they get closer to the coast.
Saturday’s rain will focus farther south than what we see today. The front will likely be through Houston (more on that below), which means showery weather should dominate much of the day. Closer to the front and coast, we should see thunderstorms try to develop, and that’s where heavier rain would be most likely late Saturday afternoon and evening.
Additional rainfall forecast between 7 AM Saturday and 7 AM Sunday will focus south and east of Houston. (Weather Bell)
Total rainfall when all is said and done Sunday morning should be on the order of 0.5 to 1.5 inches on average, with higher amounts, closer to 2 or 3 inches in spots, especially north and west of Houston or closer to Galveston and Matagorda. A quick note on Galveston: With elevated tides expected this weekend, you might notice slower drainage than usual. Most folks will be staying at home anyway, but if you do have to venture out late tomorrow, just keep that in mind.
