NOAA has updated its climate statistics for the U.S. Every 10 years, the agency comes up with a “new normal” based on the last 30 years of data. The most recent 30 years, compared to previous averages, shows that our climate is getting hotter and wetter (at least in the Houston area).
Screen capture showing new “normal” temperature and precipitation for Houston Intercontinental Airport. Blue line represents precipitation. Orange = ave. minimum temp. Red = average temp. And dark red = average max temp.
Same data in tabular format.
The “normals” help farmers, energy companies, water managers, transportation schedulers and others whose businesses depend on weather plan their activities. That includes your local TV weather casters who constantly compare what they predict for tomorrow with what has happened in the past.
What’s Normal – From 30 years Down to The Hour
The NOAA stats come in annual, seasonal, monthly, daily and even hourly tables. Because the normals have been produced since the 1930s, they also help put current weather in a historical context.
The New York Times produced a series of animated “heat” maps that show changes in temperature and precipitation for those 30-year windows from the 1930s to today. Heat maps in this sense do not refer to temperature but to colors that reflect temperature or precipition differences. Hotter colors like red and orange reflect increases. Cooler colors like green and blue reflect decreases.
Choose Your Start/Stop Points Carefully
Curiously, the animations show the U.S. getting both hotter and colder through the decades. Likewise with wetter and drier. You can clearly see alternating cycles of hot and cold, wet and dry. As cycles come and go, where you chose your start and stop points lets you support or disprove your favorite climate change hypothesis.
The change is especially drastic between the new normals and the previous ones, from 2010. “Almost every place in the U.S. has warmed,” Dr. Michael Palecki told the Times. He manages the project at NOAA’s National Centers for Environmental Information.
Palecki claims the world has warmed by more than 1 degree Celsius (about 1.8 degrees Fahrenheit) since 1900, and that the pace of warming has accelerated in recent decades.
However, if you compared 1921-50 with 1941-70, you might think the world was cooling. The same goes for large parts of the county with dry/wet cycles. Although the Houston region has experienced increasing wetness on a fairly consistent basis, you can see drought ebb and flow through other parts of the country.
If you use 1900 as your start point and today as your stopping point, Palecki says the world has warmed by more than 1 degree Celsius (about 1.8 degrees Fahrenheit) and that the pace of warming has accelerated in recent decades. The precipitation maps show the Southwest becoming increasingly drier, while the Central and Eastern parts of the country are getting wetter.
These two “heat” maps show the change in average annual precipitation and temperature during the previous 30-year reporting period and today’s.
Says NOAA, “Most of the U.S. was warmer, and the eastern two-thirds of the contiguous U.S. was wetter, from 1991–2020 than the previous normal period, 1981–2010. The Southwest was considerably drier on an annual basis, while the central northern U.S. has cooled somewhat.”
For More Information
Check out the fascinating NY Times article or go straight to NOAA for far more detailed information.
Like all NOAA statistics, they are publicly available. You can even customize your own data searches based on time and location.
Posted by Bob Rehak on 5/13/2021 based on information from The NY Times and NOAA
1353 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2021/05/Screen-Shot-2021-05-13-at-1.24.08-PM.png?fit=2200%2C836&ssl=18362200adminadmin2021-05-13 13:44:502021-05-13 13:50:52NOAA Adopts New Normal: Hotter, Wetter
In its March 10th board meeting, the Coastal Water Authority (CWA) accepted the recommendation of a preliminary engineering report to add one thousand feet of crest gates to the uncontrolled spillway portion the Lake Houston Dam. The additional release capacity would let operators shed water faster before, during or after major storms to reduce the risk of flooding.
At the March meeting, directors also approved $4.4 million to begin Phase II of the project. Phase II calls for Black & Veatch to proceed to final engineering of the gates and a coffer dam to protect the work area during construction.
This morning, at its May board meeting, directors received an update on the progress of Phase II work to date and plans for the remainder of the project.
Start of Phase II Engineering Approved in March
In the March meeting, CWA approved funds to begin Phase 2 of the engineering which includes the final design of the selected alternative by Black & Veatch. The selected alternative was “crest gates” constructed on the uncontrolled spillway portion of the dam on its west side. (See below.)
Looking NE at the Spillway of the Lake Houston Dam is in foreground. One thousand feet (about a third) of this spillway will be replaced with crest gates. Gates will be placed at the end closest to the camera position in the image above.
Dam operators can raise or lower crest gates from a bottom hinge, much like the lid on a piano. When in the up position, gates hold water back. When lowered, they release water.
Also in March, CWA and Black & Veatch completed negotiation of the scope and fee for the final design. The key deliverables during Phase II will include:
Plans to modify the spillway to support the 1,000 linear feet of crest gates (in five 200-foot long sections)
Design of the cofferdam system to protect the work areas during construction
Preparation of a new gate operations plan for CWA Lake Houston Dam operators.
Director Douglas Walker moved to authorize the Executive Director to issue a contract amendment with Black & Veatch Inc. in the amount of $4,465,727.00 for “Phase 2 – Final Design of the Lake Houston Dam Spillway Improvement Project.” Director Giti Zarinkelk seconded the motion. The Motion carried unanimously.
May Update
In the May board meeting this morning, directors received an update on Phase II work to date and plans.
In April, the design team held a number of workshops and coordination meetings.
Black & Veatch also completed three weeks of field surveying of the existing spillway; that’s why CWA temporarily lowered Lake Houston during that period.
In other news, for next steps CWA will:
Submit the permit application to the US Army Corps of Engineers by the end of May.
Support City of Houston in a public outreach meeting scheduled for June 17. The public outreach meeting will coincide with the public comment period for the permit application. CWA expects permitting to take nine months, i.e., through March of 2022.
Complete final design by the end of September 2022.
Screen capture from portion of CWA Board meeting today shows status of Phase II Design work on the dam.
Next Steps
Does all this mean construction is assured? No. The Army Corps could reject the permit or FEMA could find some fault with the plans. But at least it shows progress. If all plans and permits are approved, construction dollars have already been committed by FEMA. Originally, construction was supposed to have been completed within three years from April 8, 2020. That now looks unlikely unless the City can obtain a deadline extension from FEMA..
Posted by Bob Rehak on 5/12/2021
1352 Days after Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2021/05/20210512-Screen-Shot-2021-05-12-at-10.23.26-AM.jpg?fit=1200%2C670&ssl=16701200adminadmin2021-05-12 12:28:352021-05-12 15:19:42May 2021 Gate Project Update for Lake Houston Dam
Several area conservation groups are working with the Houston Area Research Center (HARC) to protect land along riparian corridors and educate people about the importance of that. A stunningly beautiful new website called Headwaters to Baywaters explains how protecting riparian habitat helps protect people from flooding, improve water quality, and produce other benefits far in excess of the dollars invested.
The Headwaters to Baywaters website also uses a novel graphic technique to dramatize the connectedness of waterways and people. Scrolling down one long page takes you on a visually lush journey from Headwaters to Baywaters. It starts far upstream where trickles of water coalesce into small streams and then moves all the way down to Galveston Bay with intermediate stops along the way.
As you scroll, little dialog boxes pop up that present you with tidbits of information that pertain to things you are seeing at that stage in your journey.
The Headwaters to Baywaters Initiative works to connect regional bayous and Galveston Bay through planning to identify:
High quality, riparian habitats with the potential to contribute to water quality improvements
Restoration and enhancement of riparian lands adjacent to targeted priority areas
Acquisition of land and designation of conservation easements on priority areas for riparian corridor protection.
It is part of the 8-County Gulf-Houston Regional Conservation Plan (RCP), facilitated by Houston Wilderness.
Headwaters to Baywaters Partners
The Headwaters to Baywaters Initiative includes the following partners:
Bayou Land Conservancy has been at the forefront of land preservation in the Houston region for 25 years, with the mission of preserving land along streams for flood control, clean water, and wildlife. For further information visit www.bayoulandconservancy.org and learn about its strategic conservation plan.
Buffalo Bayou Partnership is the non-profit organization revitalizing and transforming Buffalo Bayou, Houston’s most significant natural resource. For further information visit www.buffalobayou.org.
The Galveston Bay Foundation’s mission is to preserve, protect and enhance the natural resources of the Galveston Bay estuarine system and its tributaries for present users and for posterity. For further information visit www.galvbay.org.
Houston Audubon Society’s mission is to advance the conservation of birds and positively impact their supporting environments. For further information visit www.houstonaudubon.org.
Katy Prairie Conservancy is a nationally accredited 501(c)(3) non-profit organization working to protect coastal prairie, wetlands, and agriculture in southeast Texas for people and wildlife. For further information visit www.katyprairie.org.
About HARC
Founded in 1982 by George P. Mitchell, HARC is a nonprofit research hub providing independent analysis on energy, air, and water issues to people seeking scientific answers. For further information visit www.HARCresearch.org.
Please Help Support This Initiative
These are all great organizations worthy of the support of everyone in the region. The Bayou Land Conservancy has a special focus on the north Houston region. If you want to learn more in person, join the BLC on one of its educational nature walks.
I often focus on the problems of flood mitigation. Supporting this initiative is an easy way to get involved in preventing those problems.
lDr. Stephanie Glenn, HARC’s Program Director for Water and Hydrology is leading this partnership effort.
Posted by Bob Rehak on May 11, 2021
1351 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2018/11/SJR_704_048-e1612057029212.jpg?fit=1200%2C811&ssl=18111200adminadmin2021-05-11 12:09:342021-05-11 12:13:36Headwaters to Baywaters: A Story of Urban Resilience
NOAA Adopts New Normal: Hotter, Wetter
NOAA has updated its climate statistics for the U.S. Every 10 years, the agency comes up with a “new normal” based on the last 30 years of data. The most recent 30 years, compared to previous averages, shows that our climate is getting hotter and wetter (at least in the Houston area).
The “normals” help farmers, energy companies, water managers, transportation schedulers and others whose businesses depend on weather plan their activities. That includes your local TV weather casters who constantly compare what they predict for tomorrow with what has happened in the past.
What’s Normal – From 30 years Down to The Hour
The NOAA stats come in annual, seasonal, monthly, daily and even hourly tables. Because the normals have been produced since the 1930s, they also help put current weather in a historical context.
The New York Times produced a series of animated “heat” maps that show changes in temperature and precipitation for those 30-year windows from the 1930s to today. Heat maps in this sense do not refer to temperature but to colors that reflect temperature or precipition differences. Hotter colors like red and orange reflect increases. Cooler colors like green and blue reflect decreases.
Choose Your Start/Stop Points Carefully
Curiously, the animations show the U.S. getting both hotter and colder through the decades. Likewise with wetter and drier. You can clearly see alternating cycles of hot and cold, wet and dry. As cycles come and go, where you chose your start and stop points lets you support or disprove your favorite climate change hypothesis.
The change is especially drastic between the new normals and the previous ones, from 2010. “Almost every place in the U.S. has warmed,” Dr. Michael Palecki told the Times. He manages the project at NOAA’s National Centers for Environmental Information.
Palecki claims the world has warmed by more than 1 degree Celsius (about 1.8 degrees Fahrenheit) since 1900, and that the pace of warming has accelerated in recent decades.
However, if you compared 1921-50 with 1941-70, you might think the world was cooling. The same goes for large parts of the county with dry/wet cycles. Although the Houston region has experienced increasing wetness on a fairly consistent basis, you can see drought ebb and flow through other parts of the country.
If you use 1900 as your start point and today as your stopping point, Palecki says the world has warmed by more than 1 degree Celsius (about 1.8 degrees Fahrenheit) and that the pace of warming has accelerated in recent decades. The precipitation maps show the Southwest becoming increasingly drier, while the Central and Eastern parts of the country are getting wetter.
Says NOAA, “Most of the U.S. was warmer, and the eastern two-thirds of the contiguous U.S. was wetter, from 1991–2020 than the previous normal period, 1981–2010. The Southwest was considerably drier on an annual basis, while the central northern U.S. has cooled somewhat.”
For More Information
Check out the fascinating NY Times article or go straight to NOAA for far more detailed information.
Like all NOAA statistics, they are publicly available. You can even customize your own data searches based on time and location.
Posted by Bob Rehak on 5/13/2021 based on information from The NY Times and NOAA
1353 Days since Hurricane Harvey
May 2021 Gate Project Update for Lake Houston Dam
In its March 10th board meeting, the Coastal Water Authority (CWA) accepted the recommendation of a preliminary engineering report to add one thousand feet of crest gates to the uncontrolled spillway portion the Lake Houston Dam. The additional release capacity would let operators shed water faster before, during or after major storms to reduce the risk of flooding.
At the March meeting, directors also approved $4.4 million to begin Phase II of the project. Phase II calls for Black & Veatch to proceed to final engineering of the gates and a coffer dam to protect the work area during construction.
Read the minutes of the March board meeting here. The discussion of the gates starts on page 4 under Item B.
This morning, at its May board meeting, directors received an update on the progress of Phase II work to date and plans for the remainder of the project.
Start of Phase II Engineering Approved in March
In the March meeting, CWA approved funds to begin Phase 2 of the engineering which includes the final design of the selected alternative by Black & Veatch. The selected alternative was “crest gates” constructed on the uncontrolled spillway portion of the dam on its west side. (See below.)
Dam operators can raise or lower crest gates from a bottom hinge, much like the lid on a piano. When in the up position, gates hold water back. When lowered, they release water.
During Harvey, the peak flow over the spillway was five times the average flow over Niagra Falls. A wall of water 11 feet tall cascaded over the spillway above. Enough to fill NRG stadium in 3.5 minutes.
Scope of Phase II Design Work
Also in March, CWA and Black & Veatch completed negotiation of the scope and fee for the final design. The key deliverables during Phase II will include:
Director Douglas Walker moved to authorize the Executive Director to issue a contract amendment with Black & Veatch Inc. in the amount of $4,465,727.00 for “Phase 2 – Final Design of the Lake Houston Dam Spillway Improvement Project.” Director Giti Zarinkelk seconded the motion. The Motion carried unanimously.
May Update
In the May board meeting this morning, directors received an update on Phase II work to date and plans.
In April, the design team held a number of workshops and coordination meetings.
Black & Veatch also completed three weeks of field surveying of the existing spillway; that’s why CWA temporarily lowered Lake Houston during that period.
In other news, for next steps CWA will:
Next Steps
Does all this mean construction is assured? No. The Army Corps could reject the permit or FEMA could find some fault with the plans. But at least it shows progress. If all plans and permits are approved, construction dollars have already been committed by FEMA. Originally, construction was supposed to have been completed within three years from April 8, 2020. That now looks unlikely unless the City can obtain a deadline extension from FEMA..
Posted by Bob Rehak on 5/12/2021
1352 Days after Hurricane Harvey
Headwaters to Baywaters: A Story of Urban Resilience
Several area conservation groups are working with the Houston Area Research Center (HARC) to protect land along riparian corridors and educate people about the importance of that. A stunningly beautiful new website called Headwaters to Baywaters explains how protecting riparian habitat helps protect people from flooding, improve water quality, and produce other benefits far in excess of the dollars invested.
New Website Uses Novel Technique
The Headwaters to Baywaters website also uses a novel graphic technique to dramatize the connectedness of waterways and people. Scrolling down one long page takes you on a visually lush journey from Headwaters to Baywaters. It starts far upstream where trickles of water coalesce into small streams and then moves all the way down to Galveston Bay with intermediate stops along the way.
As you scroll, little dialog boxes pop up that present you with tidbits of information that pertain to things you are seeing at that stage in your journey.
It’s informative and impactful. Make sure to share it with everyone in your family. It dramatizes the importance of prevention over correction. Preserving land along rivers and streams is far less costly and time-consuming than trying to correct the problems later if we lose them.
About the Headwaters to Baywaters Initiative
The Headwaters to Baywaters Initiative works to connect regional bayous and Galveston Bay through planning to identify:
It is part of the 8-County Gulf-Houston Regional Conservation Plan (RCP), facilitated by Houston Wilderness.
Headwaters to Baywaters Partners
The Headwaters to Baywaters Initiative includes the following partners:
Bayou Land Conservancy has been at the forefront of land preservation in the Houston region for 25 years, with the mission of preserving land along streams for flood control, clean water, and wildlife. For further information visit www.bayoulandconservancy.org and learn about its strategic conservation plan.
Buffalo Bayou Partnership is the non-profit organization revitalizing and transforming Buffalo Bayou, Houston’s most significant natural resource. For further information visit www.buffalobayou.org.
The Galveston Bay Foundation’s mission is to preserve, protect and enhance the natural resources of the Galveston Bay estuarine system and its tributaries for present users and for posterity. For further information visit www.galvbay.org.
Houston Audubon Society’s mission is to advance the conservation of birds and positively impact their supporting environments. For further information visit www.houstonaudubon.org.
Katy Prairie Conservancy is a nationally accredited 501(c)(3) non-profit organization working to protect coastal prairie, wetlands, and agriculture in southeast Texas for people and wildlife. For further information visit www.katyprairie.org.
About HARC
Founded in 1982 by George P. Mitchell, HARC is a nonprofit research hub providing independent analysis on energy, air, and water issues to people seeking scientific answers. For further information visit www.HARCresearch.org.
Please Help Support This Initiative
These are all great organizations worthy of the support of everyone in the region. The Bayou Land Conservancy has a special focus on the north Houston region. If you want to learn more in person, join the BLC on one of its educational nature walks.
I often focus on the problems of flood mitigation. Supporting this initiative is an easy way to get involved in preventing those problems.
lDr. Stephanie Glenn, HARC’s Program Director for Water and Hydrology is leading this partnership effort.
Posted by Bob Rehak on May 11, 2021
1351 Days since Hurricane Harvey