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Weather History Topics
Take A Look Back At Many Different Past Weather Events!

Remembering the Derecho of June 29, 2012! (Photo Credit: Storm Prediction Center)

6/28/2017

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Picture
On June 29, 2012, a massive severe storm impacted millions of people from Iowa to the east coast of Virginia. This storm, which was later classified as a derecho, took place in under 24 hours moving at an average pace of 60 mph. The SPC noted that the derecho travelled approximately 700 miles in under 12 hours!
 
General thunderstorms had began to form over eastern Iowa where a “modest band of moist, southwesterly low-level winds (known as the “nocturnal low level jet”) intersected a weak stationary front.” The fronts extension into Pennsylvania provided the derecho’s path for the remainder of the day. An elevated mixed layer deepened the storms severity despite not having a jet stream disturbance. The storms in Iowa produced severe hail and damaging winds. When the storms entered Indiana, they began to “bow” as seen from the image above. In bow-echoes, the main threat is damaging winds because the storm is drawing winds from behind and pushing it forward making the storm “bow.”
 
As the parent storm over northern Indiana strengthened, new storms to the south began to contribute as surface heating destabilized the region. The two systems joined forces and rapidly intensified as they moved into Ohio. A wind gust of 91 mph was recorded at Fort Wayne which was the strongest wind gust ever recorded in June and July in the last 61 years of recording. The Storm Prediction Center noted that the derecho reached its peak intensity over the southern half of Ohio where numerous trees were downed, roofs were damaged, people were injured and deaths were reported. As the derecho tore through West Virginia, the storm slightly weakened as it crossed over the Appalachian Mountains. Even with slightly weakening, the system still produced very high winds. After crossing the mountains, the system regained some strength producing wind gusts between 65-75 mph in Washington, D.C. The 9-1-1 service was interrupted due to power outages. Cellphone service was halted due to towers and telephone poles being down. As the storm continued east, the winds weakened to approximately 60-70 mph as it entered the Tidewater and Delaware. Numerous trees had fallen and two deaths were reported in New Jersey when a tree fell on their tent.
 
This derecho was not the first in this area, however, it was the first to gain headlines. The SPC noted that this system was “not-well forecasted,” however, this event will serve as a tool to use for the next event. To read the SPC’s full report, and for more graphics, click here!
 
For more on weather history, click here!
 
ⓒ 2017 Meteorologist Brandie Cantrell

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  • Home
  • About
    • GWCC Is
    • Where in the World is GWCC?
    • Contact Us
  • Global Regions
    • Africa
    • Atlantic Ocean and Caribbean Sea
    • Central and Eastern Pacific Ocean
    • Central and South America
    • Europe
    • North America
    • Indian Ocean and Asia
    • Polar Regions
    • South Pacific Ocean and Australia
    • Western Pacific Ocean
  • Weather
    • Applied Meteorology >
      • Air Quality
      • Aviation
      • Droughts
      • Fire Weather
      • Flooding
      • Geosciences
      • Global Environmental Topics
      • Weather Observations
    • Weather Education
    • Weather History
    • Weather Research
    • Weather Safety and Preparedness
    • Severe Weather
    • Social Sciences
    • Space Weather
    • Tropical Cyclones
    • Weather and Health
    • Winter Weather
  • Climate
  • GWCC Global Imagery Archive
  • GWCC Window to the World
    • GOES-16 Live Satellite Imagery Portal
    • GOES-16 ABI Channel Description and Examples
    • GOES-16 ABI Satellite Products
    • GOES-17 Live Satellite Imagery Portal
    • Himawari-8 Live Satellite Imagery Portal
    • Meteosat-11 Live Satellite Imagery Portal
  • Kids Corner
    • Kindergarten to 5th Grade
    • 6th to 12th grade
    • Fun Facts & Weather Trivia
    • GWCC Weather Radar Education
    • GWCC Wheel of Science