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mwallner324 authored Jan 5, 2025
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<Block>
<Prose>
## Overview
The morning of May 12, 2022, began quietly across the Midwest, but by midday, the skies darkened as a powerful serial derecho brought hurricane-force winds exceeding 100 mph across Nebraska, South Dakota, Iowa, Minnesota, and North Dakota. This devastating weather event flattened fields of young corn and soybeans, uprooted trees, and toppled grain silos vital to local economies. With 68 reports of wind gusts over 75 mph, it set a record for a single convective complex. For rural, agriculture-dependent communities, the derecho was catastrophic, destroying crops and irrigation systems while also crippling farming infrastructure. Grain silos—critical for food storage and supply chains—were torn apart, and the economic ripples extended through local and national agricultural markets. The storm laid bare the vulnerabilities of rural America to extreme weather and majorly disrupted the livelihoods of all who depend on food sources from this region.
The morning of May 12, 2022, began quietly across the Midwest, but by midday, the skies darkened as a powerful serial derecho brought hurricane-force winds exceeding 100 mph across Nebraska, North Dakota, South Dakota, Iowa, and Minnesota. With 68 reports of wind gusts over 75 mph, this weather event proved to be destructive as it impacted the Northern Plains region. These states are deeply rooted in agriculture, where farming is a good portion of their economies, serving as a source of employment in farming, processing, and distribution, and producing key crops like corn and soybeans (figure 1). Therefore, severe weather events like derechos pose a significant threat to these livelihoods, causing crop destruction, soil erosion, and damage to critical infrastructure such as grain silos and irrigation systems. When farms are impacted, the ripple effects extend beyond these small communities, disrupting local economies, and food supply chains.
</Prose>

<Figure>
<Image
src={new URL('./derecho_food_percent.png', import.meta.url).href}
alt='Percentage of state population involved in the agricultural industry'
/>
<Caption>
Figure 1. Direct food and agricultural jobs as a percent of the each state's population reported by the [American Farm Bureau Federation](https://www.fb.org/market-intel/feeding-the-economy-agricultural-jobs-by-state#:~:text=In%20many%20states%2C%20primarily%20in,tied%20to%20agriculture%20is%20lower.). The total includes direct jobs in agriculture, manufacturing, wholesale and retail.
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<Prose>
This storm laid bare the vulnerabilities of rural America, as this was an unusually intense and damaging weather event due to its strong wind speeds, large-scale impact over 600 miles long, and associated severe weather phenomena such as tornadoes, hail and heavy rainfall. The storm’s rapid speed, traveling at 50 mph, left little time for preparation, overwhelming emergency response systems. This intensity, paired with its extensive land coverage, led to widespread destruction of infrastructure and agricultural losses.
</Prose>
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</video>
<Caption>
Visual of the abundant lightning within the derecho as it races across Nebraska into South Dakota. (Source: [CSU/CIRA](https://satlib.cira.colostate.edu/event/northern-plains-derecho/))
Visual of the abundant lightning within the derecho as it races across Nebraska into South Dakota, demonstrating the storm's intensity. (Source: [CSU/CIRA](https://satlib.cira.colostate.edu/event/northern-plains-derecho/))
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alt='How serial vs progressive derechos form.'
/>
<Caption>
Weather patterns favorable for progressive and serial derechos. Progressive derechos form in hot, moist areas with strong winds and are harder to predict due to subtle triggers. Serial derechos form along a longer line of storms in large-scale systems, making them easier to forecast. (Source: [NWS LMK](https://www.weather.gov/lmk/derecho#:~:text=Therefore%2C%20a%20progressive%20derecho%20can,system%20that%20typically%20creates%20them.))
Figure 2. Weather patterns favorable for progressive and serial derechos. Progressive derechos form in hot, moist areas with strong winds and are harder to predict due to subtle triggers. Serial derechos form along a longer line of storms in large-scale systems, making them easier to forecast. (Source: [NWS LMK](https://www.weather.gov/lmk/derecho#:~:text=Therefore%2C%20a%20progressive%20derecho%20can,system%20that%20typically%20creates%20them.))
</Caption>
</Figure>

<Prose>
## What is a Derecho?
Derechos are a type of severe windstorm caused by thunderstorms that move quickly in a straight line over a wide area. Unlike tornadoes, which have rotating winds, derechos produce widespread, powerful winds that can extend for hundreds of miles. The May 12, 2022, event was a serial derecho, a particularly intense type of derecho. Serial derechos occur when multiple clusters of thunderstorms form along a cold front, creating a prolonged impact on the same region. This type of derecho is especially destructive because it produces waves of high winds over an extended area, weakening structures with each round of storms that move through.
Derechos are a type of severe windstorm caused by thunderstorms that move quickly in a straight line over a wide area. Unlike tornadoes, which have rotating winds, derechos produce widespread, powerful straight-line winds that can extend for hundreds of miles. The May 12, 2022, event was a serial derecho, a particularly intense storm that occurs when multiple clusters of thunderstorms form along a cold front, creating a prolonged impact on the same region (figure 2). This is especially destructive because it produces multiple rounds of high winds over an extended area, weakening structures with each storm that moves through.
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<Prose>
For this derecho, the setup was perfect: a heat wave created unstable air, while a strong storm system provided the necessary energy for severe storms to form. Sioux Falls, South Dakota, recorded a high of 94°F, much hotter than usual for May. These conditions, combined with a powerful jet stream, drove the rapid development of the storm system. The National Weather Service’s radar showed a characteristic bow-shaped formation called a "bow echo," a signature of strong, concentrated winds that caused the most damage. Serial derechos like this one are particularly challenging for communities because they overwhelm emergency response systems. Roads can be blocked for hours, power outages last longer, and damaged structures often endure repeated impacts from the storm.
The atmospheric setup created the perfect conditions for the destructive derecho. A significant heatwave gripped the region, with temperatures in Sioux Falls, South Dakota, reaching an unseasonable 94°F, fueling instability for storms to form. Coupled with high moisture levels, a robust low-pressure system over the Plains, and a powerful jet stream enhancing wind shear, thunderstorms intensified and organized into a massive “bow-shaped” complex. The combination described provided all the necessary ingredients for the storm's rapid development and widespread destruction on farmland and infrastructure.
</Prose>

<Figure>
<iframe width="560" height="315" src="https://www.youtube.com/embed/0SNRwR23jqE?si=vrA-IyLgG9hnClpb" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
<figcaption>Region-scale MRMS radar reflectivity with the respective time frame that the derecho impacted each state. Courtesy of the National Weather Service in Aberdeen, SD.</figcaption>
<figcaption>Regional-scale MRMS radar reflectivity with the corresponding time frame that the derecho impacted each state. Courtesy of the National Weather Service in [Aberdeen, SD](https://www.youtube.com/watch?v=0SNRwR23jqE).</figcaption>
</Figure>
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