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LetMyPeopleVote

(154,039 posts)
Sat May 18, 2024, 01:24 PM May 2024

The historic severe storm that hit Houston/Harris County has now been designated a "derecho" wind storm.

I have learned a new term. This storm continued long after it left Houston



Some big weather news today, the historic severe storm that started in Texas and ended in central Florida Thursday evening into Friday midday has now been designated a "derecho" wind storm. Early damage estimates are several BILLION dollars just in Houston, Texas alone. It started in Texas and ended in Florida, but the majority of the damage was in Texas, Louisiana, and the Florida Panhandle. I also plotted the Severe Storm Warnings that occurred and each icon a severe wind report.

These are what often happen in the Heartland and northern United States in the summer when they ride the periphery of a "heat dome" -- just like this one did.



I looked up this term and found this
https://www.cnn.com/2023/02/27/weather/derecho-damaging-wind-event-xpn/index.html

A derecho is a significant, potentially destructive weather event that is characterized as having widespread, long-lived, straight-line winds associated with a fast-moving group of severe thunderstorms.

Here’s what you need to know about derechos:

They can produce hurricane-force winds
While there’s no official or universal definition for a derecho, it is classified by a swath of wind damage extending more than 400 miles with wind gusts of 58 mph or greater along most of its length, according to the Storm Prediction Center.

The SPC increased the required path of damage by more than 50% from 240 miles to 400 miles in January 2022 based on a 2016 study. The hope was that the added rigor would help reserve the term “derecho” for the most impactful, long-lasting and widespread events, SPC meteorologists told CNN.

“We’re really trying to highlight with just one word, the worst, most damaging wind event that you can potentially expect,” Matt Elliott, SPC warning coordination meteorologist, told CNN. “If we can keep it to these higher end events, then it can be really meaningful because when you hear that term it’s means that we’re talking about something extremely serious.”,....

They’re one of the costliest severe storms
Winds within a derecho can be as strong as a tornado, knocking out trees, powerlines, mobile homes, barns and other similar structures, according to the Storm Prediction Center.

They are most dangerous to those outdoors, whether in a rural or urban area. However, cities are particularly vulnerable to these high winds due to damage to electrical and communication lines, falling trees, and damage to buildings.

The weather people kept mentioning this type of storm on the local coverage and I had to look it up and learned more about this type of storm
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The historic severe storm that hit Houston/Harris County has now been designated a "derecho" wind storm. (Original Post) LetMyPeopleVote May 2024 OP
A Derecho is responsible for the damage in Houston yesterday. LetMyPeopleVote May 2024 #1
How Houston's rare derecho was fueled by a Mexican 'heat dome' creating high temps in Texas LetMyPeopleVote May 2024 #2
Call it whatever the hell you like. Paladin May 2024 #3

LetMyPeopleVote

(154,039 posts)
2. How Houston's rare derecho was fueled by a Mexican 'heat dome' creating high temps in Texas
Tue May 21, 2024, 06:37 PM
May 2024


https://www.houstonchronicle.com/news/houston-weather/article/derecho-heat-dome-mexico-storms-19470656.php

A heat dome in Mexico contributed to Houston’s rare derecho event on May 16, when deadly and destructive winds whipped Southeast Texas, leaving eight dead and much of the nation’s fourth-largest city without electricity, according to the National Weather Service.

The recent derecho event in Houston was only the fifth derecho reported in Texas in the past 40 years. Derechos are widespread storm systems featuring straight-line winds that occur with bands of rapidly moving thunderstorms, such as bow echoes or squall lines.

Although a derecho can produce damage similar to a tornado, two of which also were confirmed in the May 16 storms, the damage typically runs in one direction along a relatively straight swath, the weather service says.

A ridge of high atmospheric pressure has been lingering in Mexico for several weeks. This heat dome has resulted in scorching temperatures across Central America, far South Texas, and southern Florida. Heat index readings exceeded 115 degrees in Key West, marking the highest such temperatures ever recorded there......

Some of the most noteworthy Texas derecho events have occurred in May:

The Texas Boaters Derecho in 1986 was caused by a line of storms that lashed much of Southeast Texas, overturning 65 boats in the Galveston Bay during a fishing tournament and a boat race.
The Texas Derecho of 1989 started in the Panhandle and traveled 900 miles in 15 hours before stopping in Louisiana.
The People Chaser Derecho of 2001 produced 80 mph winds in Fort Worth for more than 10 minutes.
The High Wind Derecho of 2007 in North Texas produced 80 mph winds in the Dallas-Fort Worth Metroplex, taking down power lines and leaving a quarter million people without power.
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