Flash Flood Watch, Flood Warning Extended

Flood Watch through 7 P.M. For Most of Region

The National Weather Service (NWS) has issued a flash flood watch for most of the Houston region. The watch will last through 7 P.M. this evening.

Flood Warning Through Saturday Morning For Smaller Areas

In addition, NWS has issued a flood warning for counties to the west and east of Houston. See map below.

From Weather.gov

NWS predicts minor flooding for East Fork San Jacinto near New Caney affecting Harris, Liberty and Montgomery Counties.

Precautions:

Persons with interests along these streams should keep alert to rising water and take all precautions to protect their property. Do not drive or walk into flooded areas the depth and water velocity could be too great for you to cross safely. Avoid any water covered roads and find an alternate route. Livestock and equipment should be removed from the flood plain immediately. Stay tuned to NOAA Weather radio or other news sources for further updates. Turn around, don`t drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov.

Today’s Forecast: More Heavy Rain Probable

According to Harris County Meteorologist Jeff Lindner, “…deep tropical moisture to the west will help create a series of upper level disturbances once again today. The result: scattered showers and thunderstorms that should begin with daytime heating. As a disturbance approaches the area this afternoon from the west, showers and thunderstorms will likely become slightly more organized.”

The air mass over the Lake Houston Area remains capable of heavy to excessive short term rainfall rates. Yesterday, 5-7 inches of rain fell over northeast Harris County in 4-5 hours. 8-12 inches fell over Austin County near Bellville.

Hourly rainfall rates of 2-3 inches per hour were common on Monday and the same air mass is in place today.

Rainfall today will likely average between 1-2 inches over the region, but isolated totals of 5-6 inches will be possible. Short range models indicate areas along and northwest of US 59 could be the prime location today for heavy rainfall. However, much of this will depend on:

  • Where storms develop
  • If and where any training develops
  • If any storms anchor in place.

Grounds are saturated from the recent rainfall. During the last 7 days, that rainfall has averaged 5-7 inches over much of the region with isolated totals of 10-14 inches.

Watersheds are already elevated this morning due to the recent rainfall and ongoing run-off over the area. Additional heavy rainfall will quickly run-off creating new rises.

Bens Branch at Kingwood Drive around 6PM on 5/24/21 after a 4-inch rain. Additional rains today, if heavy, could force creeks like this even higher.

Rapid onset flash flooding of streets and poor drainage areas will be the primary concern today, but should heavy rainfall impact already elevated and swollen watersheds some flooding would be possible. 

We should get a break from the rain Thursday and Friday, but more rainfall could enter the picture by this weekend, driving up rain chances yet again.

It’s been a wet month and will get wetter.

River and Lake Report

From Harris County Flood Warning System at 6:20 AM, 5.25.21.

In the upper right at the highest red icon, Peach Creek at FM2090 is three feet out of its banks. This area has flooded three times this month.

The yellow icon below it and to the right is the East Fork at FM2090. It is still two feet within its banks, but additional rainfall today could cause flooding.

The red icon at the northeastern tip of Harris County is the East Fork at FM1485. It is out of its banks again for the third time this month.

Lake Conroe is up about a half foot and releasing almost 1600 Cubic Feet Per Second.

As of 6:30 am on 5/25/2021

According to the Coastal Water Authority, Lake Houston is almost a foot and a half above normal and still releasing.

From Coastal Water Authority at 5:30 am on 5/25/2021

Posted by Bob Rehak at 6 a.m. 5.25.21 based on information from NWS and HCFCD

1365 Days since Hurricane Harvey

Today, We Passed the Record for All-Time Wettest May By a Wide Margin

At least if you go by the gage at my house. With six days left in the month, the Lake Houston Area has already broken the record for the all time wettest May. The official gage, of course, is at Bush Intercontinental Airport, but the NWS doesn’t release monthly data until the month is over.

This afternoon, my back yard rain gage recorded 17.24 inches for May. The previous record was 14.39 inches set in 1970. (See chart below.) That’s a 20% increase! With more rain on the way tonight and later this week.

From National Weather Service.

Effect on Area Streets

We also recorded 4.11 inches this afternoon in a four-hour period. That’s pushing the limits of storm drains. And predictably, people reported street flooding all over the area.

Ford Road in Porter on 5/24/2021 after 4 inches of rain in 4 hours. Photo courtesy of Nicole Black-Rudolph. Ford Road is one of the main evacuation routes from Kingwood when Northpark and Kingwood Drives are cut off by high water. Now upstream development is flooding it too.
Photo of street flooding in Atascocita, courtesy of Jennifer Zorn. Atascocita received more than 7 inches of rain in a 3-4 hour period.according to television news reports tonight. That qualifies as approximately a 50-year rain.
The City’s long-running sewer repair project in Kingwood Lakes has created a dam across the main lake, artificially raising the water level. Photo courtesy of Anna Mitchell.

Flash Flood Watch Till 9PM

A flash flood watch remains in effect for the Houston area until 9pm tonight. The four inches that fells this afternoon in about 4 hours rates as about a 5-year rain. Last weeks 5.5 inches in a little more than 3 hours was a 10-year rain. No wonder we’ve had the wettest May!

It’s important to remember that these statistics are averages. Just because you get a ten-year rain one week does NOT mean you are immune to another for 9.99 more years.

Effect of Five-Year Rain on Bens Branch

Before the recent rehabilitation project on Ben’s Branch, parts of this channel were down to a two-year level of service. Below, you can see how it handled a 5-year rain today. Room to spare. Quite an improvement for a maintenance project!

Looking downstream over Bens Branch toward Kingwood Town Center. Photo taken 5.24.21.
Looking downstream toward Lake Houston along Ben’s Branch.
Where Ben’s Branch crosses under Kingwood Drive, the City has yet to work out some kinks. Harris County Flood Control District does not maintain under City bridges. In fairness to the City, the Bens Branch rehab project was completed just last month.

Overall, ditches and streams in Kingwood seem to be within their banks.

Wider-Area Stream and Lake Report

However, warning signs are popping up all around the Lake Houston Area.

Harris County Flood Warning System 5.24.21 at 7PM.

At this hour, Lake Conroe seems under control. Luckily, the highest rainfall totals in the Lake Conroe area today were less than one inch.

But Lake Houston is approaching two feet above normal despite constant releases by the Coast Water Authority.

Posted by Bob Rehak on 5/24/21 with thanks to Nicole Black-Rudolph and Jennifer Zorn.

1364 Days since Hurricane Harvey

2021 Report Card on Texas Flood-Issue Legislation To Date

With the Texas legislature days away from adjournment, it’s time to see how flood-related legislation fared. Out of the 20 bills listed below, one has a chance of turning into law.

Still Has a Chance

HB 531 – Floodplain Disclosure

This bill by Armando Walle of Houston relates to floodplain disclosure for leased dwellings. It has passed both the House and Senate and is awaiting the Governor’s signature. Several pieces of similar legislation did not fare as well. See below.

Better Luck Next Session!

HB 2525 – Lake Houston Dredging District

Dan Huberty’s proposed legislation to establish a Lake Houston Dredging and Maintenance District passed the house. But the it’s sitting in the Local Government Committee in the senate chaired by Senator Paul Bettencourt. So is the identical companion bill filed by Senator Brandon Creighton SB 1982. It’s been sitting in the same committee since April 8. Someone doesn’t want this to see the light of day. A group called WaterUsersCoalition.org is desperately trying to kill both bills with misinformation. The web site characterizes the bill as one that only benefits Kingwood and Atascocita drainage. It would have certainly done that, but it would also have helped maintain and restore the capacity of Lake Houston. The website also says it would be funded by taxes which the bill(s) explicitly prohibit. And implies that increasing lake capacity would somehow hamper the conversion from groundwater to surface water.

HB 4478 – Sand Mine Reclamation

Another bill by Huberty was referred to the House Natural Resources committee on 3/29. Nothing has happened to it since. The bill would have required two things: reclamation of sand mines at the end of mining and a performance bond to ensure they met certain criteria, such as the removal of all equipment. Died in committee.

Abandoned dredge at abandoned Texas Concrete Sand and Gravel mine in Plum Grove. The TCEQ has deemed this mine reclaimed; it’s now off their radar.
HB 767 – Sand Mining Best Practices

Yet another piece of legislation by Huberty – would have established best management practices for sand mines. The House Environmental Regulation Committee left the bill pending in committee, just as they did in the 2019 legislative session. TACA wins again. We’ll have to live with worst practices for at least another two years.

HB 4341 – Sand Mine Regulatory Responsibility

This bill By Kyle Beiderman of Fredericksburg – was sent to the House Environmental Regulation Committee on 3/29. They didn’t even hold a hearing on it. The bill would have transferred responsibility for regulating sand mines from the TCEQ to the Railroad Commission of Texas.

HB 2422 – Sand Mine Locations

A piece of proposed legislation by Erin Zwiener of Kyle, Tx. would have allowed County Commissioners (in counties with populations greater than 500,000) to prohibit sand mining or the expansion of sand mines when they are too close to homes, hospitals, churches and certain other facilities. The Environmental Regulation Committee has bottled that bill up since 3/16. TACA wins again.

HB 1912 – Sand Mine Nuisances

Proposed legislation by Terry Wilson of Georgetown would have stiffened regulations relating to nuisances associated with aggregate production operations such as blasting, noise, air quality and more. The Environmental Regulation Committee has left it pending since 4/19. TACA wins again.

HB 3116 – SJRA Board Appointments

Will Metcalf of Conroe introduced two bills to change the composition of the San Jacinto River Authority Board. This one, the first, would have reduced the number of directors on the SJRA board from 7 to 6 and changed the way they are appointed. The change would have guaranteed a majority of directors from Montgomery County. The House referred the bill to its Natural Resources Committee on 3/19. Nothing has happened to it since then.

HB 4575 – SJRA Board Elections

The second Metcalf bill would have made the SJRA board elected, rather than appointed by the government. But there was a hitch. It would have denied representation to downstream residents. Hasn’t gone anywhere since April 8.

SB 314 – Disclosure of Flood Zones for Leased Property

This piece of legislation by Joan Huffman of Houston got referred to the Business and Commerce committee on 3/9. Nothing has happened since. The bill would have mandated disclosure of flood risk for leased property in a flood zone. A similar bill passed in the last session for property for sale. However, the Committee has taken no action on the leasing bill since 3/9.

HB 1059 – Disclosure of Flood Zones on Vacant Land for Sale

Another flood plain disclosure bill by Phil Stephenson of Rosenberg would have required sellers of vacant lots smaller than 15 acres to disclose whether any portion of the lot was in a flood plain. The bill would also have let buyers recover damages if the property flooded within five years and the seller failed to disclose the flood plain. This bill made it out of the Business and Industry Committee. However, the Calendar Committee never brought it up for a vote on the House floor since 4/15. It’s companion bill in the Senate – SB 461 by Kolkhorst – also stalled.

HB 1956 – Climate Change Planning

Michelle Beckley of Carrollton introduced legislation that would have required certain state agencies to consider the impact of climate changes in their strategic plans. It got referred to the State Affairs Committee on 3/15. Ba Dump. Same for similar bills like HB 1949, SB306, HB 2017, HB 3246, and HB4178.

HB 655 – Feasibility Study for Statewide Disaster Alert System

This bill Richard Raymond of Laredo called for studying the feasibility, efficiency and benefits of setting up a statewide disaster alert system. It went to the Homeland Security and Public Safety Committee on 3/1. No action since.

SB 859 – Continuation of Electronic Meetings after COVID for Regional Flood Planning Groups

A common-sense bill by Charles Perry of Lubbock would have let Regional Flood Planning Groups continue to hold meetings via telephone conference call and videoconference after emergency COVID restrictions expire. The rationale: these groups are staffed by volunteers, many of whom have to drive across several counties to get to meetings. That can take all day in West Texas. It was voted out of the Senate Business and Commerce Committee before it ran out of gas. A companion bill, HB 2103, passed the House, but also stalled in the Senate.

Seems like a lot of good ideas were left on the table.

Posted by Bob Rehak on 5/24/2021 based on research by John Barr

1364 Days after Hurricane Harvey

The thoughts expressed in this post represent opinions on matters of public concern and safety. They are protected by the First Amendment of the US Constitution and the Anti-SLAPP Statute of the Great State of Texas.