Matt Lanza

Good morning. The humidity has come surging back this morning. Whereas yesterday at this time we had a relative humidity of 64% and a dewpoint in the 40s, this morning sees relative humidity at 93% and a dewpoint into the mid-60s. The dry, pleasant weather was nice for a day. We’ll now begin a somewhat unsettled period of weather through Monday, though probably without any real serious issues.

Today

Clouds this morning may actually produce some drizzle or light rain showers a little later this morning before things attempt to clear out a bit this afternoon. Inland areas, mainly north of I-10 could see an isolated downpour or thunderstorm this afternoon with daytime heating. It’s likely that many of you will not see that today, however. Look for highs in the 80s or upper 70s if clouds stubbornly hold on. Winds won’t be too terrible, but look for a 5 to 15 mph southerly breeze today.

Saturday

Temperatures tonight get held up because of clouds and a warming air mass, so look for Saturday to begin with 70s in most of the area. That head start should allow us to easily push deep into the 80s to near 90 degrees tomorrow afternoon with a bit of sun after morning clouds.

A shower can’t be entirely ruled out but most areas will stay dry. South winds of 5 to 10 mph will provide minimal relief.

Easter Sunday

South of I-10, Sunday’s forecast is actually pretty straightforward. Look for morning clouds and some sun with temperatures in the higher 80s away from the water. Along and north of I-10, the forecast gets trickier. A cold front approaches Sunday but it struggles to get much past I-35, well west of us. But ahead of that front, showers and storms will kick off Sunday afternoon. The best chance for that will be near College Station, but the chances in and around Houston are not zero. Basically, if you have outdoor holiday plans, just be flexible and understand that, while not likely, rain will be possible for a time, especially north and west of Houston.

Outside of shower chances, we’ll see highs again well into the 80s, if not low-90s for inland spots with enough sunshine.

Monday and Tuesday

The cold front will eventually get into our part of Texas on Monday bringing a chance of showers and storms. Honestly, modeling doesn’t look too impressive in terms of storm chances in Houston, but we’ll definitely call for a slight chance. That front basically dies out once it passes us, but that will still allow for cooler temperatures and lower humidity Monday and especially Tuesday. We’ll probably see 80 or so on Monday, followed by 70s and a breeze on Tuesday, with morning lows in the 50s.

If you’re attending the Astros home opener on Monday evening, it should be turning a bit more pleasant with temperatures in the 70s pre-game and 60s during the game. I believe rain chances will dictate whether or not the roof is open, and we will know more about that on Monday itself.

Rest of next week

Humidity and warmer temperatures come flooding back in for the mid to late week period. Strong onshore winds may develop Wednesday. We’ll see a return of 80s by day, 60s or warmer by night, and shower chances. These shower chances look minor each day right now, but we’ll get a better handle on which days will carry higher rain risk by Monday or Tuesday.

Meanwhile, have a wonderful holiday weekend!

So, last Friday I noted how Houston’s pollen season had probably been in the process of peaking, slightly later than usual. The last two days laughed in the face of that comment and produced the highest tree pollen values I can find in the City of Houston’s pollen count archives (2013-2022), with values over 10,000 Wednesday and over 12,000 yesterday. Going back to 2013, there is not a remotely comparable day in Houston in terms of tree pollen, specifically oak pollen. The next closest value I can find is 6,440 on March 21, 2019. Keep in mind that pollen counts are not conducted on weekends and holidays, so there is missing data, but the odds of all the maximum days not showing up over 9 years of data is quite low.

So then, what is it? Why is this year so much worse than any recent year? There are two theories I have, neither of which I can definitively back up. The first is the drought over Texas. Since February 1st, we’ve had 3 days of rainfall over a quarter inch at Hobby Airport. Since 2000, we’ve averaged six of them. More on drought in a second, but in general rain does help wash some of this pollen away. The dryness, combined with the breezy conditions we’ve had, is just a brutal recipe right now. I’m also guessing that a lot of pollen from central Texas has found its way to Houston with those gusty winds too, as drought is much worse there.

My second theory is that the latest freeze in Houston since 1999 may also be playing a role here. We had a mid-March pair of freezing nights, and I’m wondering if that may have delayed the onset of the excessive pollen, meaning the oak pollen season is delayed. Normally we would be declining by now, but we may be at peak instead.

So my theory is that the dry and windy spring are making the season more extreme, and the later than usual freeze has made it peak later. I may be wrong here, and I would love to be corrected by a tree or pollen expert if so. Hopefully by this time next week, we’re discussing more manageable pollen levels.

Dry, dry, dry

Speaking of drought, the new drought monitor map came out yesterday, which shows that drought coverage in the Houston area inched up just a bit, primarily in Galveston, Chambers, and Brazoria Counties. Texas as a whole did just a bit better week over week.

Rainfall over the next two weeks looks to be near average in the Houston area and below average in the rest of Texas. Drought should hold or worsen statewide.

Red flag warnings are posted for today across all of southeast Texas into southern Louisiana. A red flag warning means that there is very high fire danger due to wind and low humidity levels. Dry brush and grass certainly is not helping.

Basically, use common sense today. Outdoor burning is discouraged. Don’t park on dry grass. Don’t discard cigarette butts out the car window. And if you see any sort of grass fire, report it right away before it can cause bigger problems. As of Thursday evening there were 48 active wildfires across Texas, according to the Texas Wildfire Incident Response System.

Weekend forecast

So that was a lengthy intro to today’s post! Why? There’s not much happening outside of that. Look for a sunny Friday, Saturday, and probably Sunday too. Winds will be gusty today with highs well into the 70s. Tomorrow should see lighter winds with morning lows in the 50s and daytime highs in the lower 80s. Sunday will see a shift to onshore, southerly winds and they could be strong at times, gusting up over 25 mph. Highs will be in the low 80s after morning lows in the low 60s. Humidity will start to become noticeable by later Sunday.

Next week

That onshore flow and building humidity will lead to more clouds than sun and perhaps a shower on Monday. We should still manage the low-80s, but morning lows will struggle to get below 70 degrees. Winds will be gusty again Monday also. Tuesday and Wednesday should see a chance of showers and thunderstorms, along with continued breezy conditions and warm, humid temperatures. We may or may not get a cold front through here later Wednesday or early Thursday, as modeling has been bouncing all over the place on that. If that happens, look for cooler, drier air for the end of next week. We’ll update you with the latest on Monday.

Good morning! We really hope you enjoyed yesterday’s weather. It was truly sublime, though if you’re a seasonal allergy sufferer like me, it was not quite as nice as it could have been. Yesterday was the highest tree pollen value I’ve seen in Houston this year, and as you’d expect it seems to be following a fairly typical pattern for spring. Below is a chart of total tree pollen in Houston from January 1 through April 30 over the last 5 years, plus 2022 so far. Keep in mind that there is no data for weekends or holidays, and there are currently multiple missing days in March unfortunately.

Where the pattern may be breaking down is on which date the “peak” of tree pollen occurs. I will confirm this once March’s archive is published, but if we go by what data we do have, the peak of tree pollen occurred like this in Houston:

Year	Peak Date of Pollen
2022 (so far)	March 31
2021	March 26
2020	March 6
2019	March 21
2018	March 14
2017	March 14

Assuming yesterday was our peak day for pollen, it came rather late. Data in Houston goes back to 2013, and this year would be the latest peak since at least then. That peak date is contingent on numerous things like rain, temperatures, wind, etc. So each year will be different, obviously, but this year does indeed seem to be peaking late. Based on previous seasons, we likely have about 10 to 14 more days of really high pollen before things begin to fall off steadily. There is hope for us.

Today

On to the weather, and today should be another good one. We will likely see some clouds at times, but for the most part today will be classified as mostly sunny. Look for highs around 80, give or take a few degrees. Winds will be mainly light, but up just a notch over yesterday.

Weekend

Saturday should be a fair day for most folks, with a decent amount of sunshine around. There will likely be some showers with a passing disturbance and approaching weak front, but many or most of you may not see much of anything come from that tomorrow. I’m guessing the clouds and shower chance will be highest in the morning hours, followed by clearing for the afternoon.

Sunday should be just fine with plentiful sunshine with daytime highs in the low-80s and morning lows around 60 or so each day (a few degrees cooler outside the city). Winds will be variable but generally 5 to 15 mph.

Early next week

Monday should begin fine with a mix of clouds and sun. We should be able to make the low-80s after a mild mid-60s start to the day. You will notice a bit more of an onshore breeze Monday, with 15 mph winds, and a bit gustier at times near the coast. Additionally, it looks like we’ll see some showers and thunderstorms develop on Monday afternoon.

The SPC has published their day 4 severe outlook and included the Houston area, primarily north of I-10 as having a chance for severe thunderstorms. We will likely be dealing with some “capping” in the atmosphere, as we normally do down here in spring. This increase in temperatures with altitude normally helps limit our severe weather risk near the Gulf, as opposed to what is normally seen to our north. For now, while severe storms are possible on Monday, we are comfortable saying the highest odds may be north of the Houston metro area. We’ll obviously have an update on this Monday.

Tuesday and beyond

Any storms on Monday will occur well ahead of a cold front. That front won’t actually get here until Wednesday. So we may see lingering showers on Tuesday morning, followed by clearing and warm weather Tuesday, with low to mid-80s. Wednesday could be quite warm with slightly less humidity and sunshine. Wednesday’s high temperatures are forecast to be in the mid to upper-80s right now.

For those that want more pleasant weather, it should arrive for a couple days behind Wednesday’s front. We will see lower humidity and sunshine, along with slightly cooler temperatures. More on that next week!

We’ll get to all the sun and sneezes in a minute. First, let’s talk drought again. This week’s rainfall came at a good time. Much of the state saw at least some rainfall from the storm. This led to about 3% of state being removed from drought (and about 25% of the Houston area being removed from drought as well).

We will probably need a storm a week affecting a greater part of Texas to remain with minimal drought concerns and to improve the situation elsewhere in the state. We may see one storm next week, but it looks less widespread and significant than this week’s storm as of today. No one will complain if we can keep the tornadoes away from Texas though.

Weekend

Today, tomorrow, and Sunday look great. Each day will see a little bit of warming, and it will feel solidly like spring. Look for about 80 or so today, and low 80s tomorrow and Sunday. Morning lows will generally be in the 50s both Saturday and Sunday. It will be sunny with low humidity but perhaps just enough to allow for some morning fog in spots. Winds will be light to moderate all weekend, generally about 10 to 15 mph.

This weather will cause two problems, however. The abundant sunshine, combined with local pollution will likely lead to high levels of ozone each day this weekend. Second, as Eric noted yesterday, everything’s blooming, so tree pollen is roofing, as it usually does this time of year. If you suffer from seasonal allergies (Hi, it’s me), it’s probably not getting better anytime soon.

Next week

Monday should just be an extension of the weekend with a good amount of sunshine. But there will be some changes. As a strong storm wraps up in the central Plains, onshore flow will begin to strengthen on Monday and Tuesday. Winds will likely jump to 15 to 20 mph, with higher gusts at times, especially along the coast.

The next front will cruise through probably on Wednesday with a chance of showers and storms. At this time, it does not look to be too big a deal, but we’ll keep tabs on things. That should usher in another couple days of fair weather to close out March. Ahead of the front, look for temps in the 80s, with lows in the 60s, and noticeably more humidity than the weekend. Behind the front, we’d probably cool into the 70s with lows perhaps in the 50s.