Severe Thunderstorms of June 12, 2012

The morning of June 12, 2012 began with a complex of very intense severe thunderstorms traversing the Ark-La-Tex. These thunderstorms resulted in widespread wind damage across northeast Texas, southwest Arkansas, and north Louisiana. Many trees and power lines were brought down, resulting in significant power outages. The hardest hit area was the Claiborne Parish area, specifically in and around Homer, Louisiana. Significant damage was done to numerous homes and businesses in the area. These storms were the result of a mesoscale convective system (MCS) that developed to the west of the area during the nighttime hours and quickly moved southeast across the region between 2  AM and 8 AM. Some of the results of this system were welcome, however. The region was suffering from a significant dry period, and this system brought widespread rainfall amounts in excess of one inch.

Meteorological Overview

A stationary front was draped across the Ark-La-Tex on the morning of June 12 and a very unstable airmass had setup across the region during the afternoon and evening of Monday, June 11. In fact, high temperatures across the 4 state region on Monday topped out 97 to 99 degrees F at most sites. Combined with surface dewpoints in the middle 60s and strong low level winds, the atmosphere was primed for strong to severe thunderstorms. Per mesoanalysis on the evening of June 11, deep layer shear values ranged 25 to 40 kts across East TX and Southeast OK...and were aligned as such they were supportive of strong storms organizing into lines and clusters. This occurred late that evening as storms developed over north Texas and southern Oklahoma around 11 pm and organized into a large squall line which moved southeastward along the Red River of TX and OK. As the storms moved into northern LA, a strong rear inflow jet developed (noted in the radar imagery below), resulting in widespread wind damage in Bossier, Webster, and especially Claiborne parishes. (click on images for larger version)

 

 

Satellite and Radar Imagery

This infrared satellite image shows the thunderstorm complex as it was moving over north central Louisiana and southern Arkansas. Notice the very cold cloud tops (light blue and green colors) indicating very healthy thunderstorms.
 

 

Radar and Velocity Image

 

Storm Reports
Widespread wind damage resulted across the four-state region as the line moved rapidly to the east. This is the map of storm reports from the Storm Predicition Center (SPC) . It shows that numerous damage reports were received in the Ark-La-Tex.

(Note that the widespread wind reports from Missouri to Mississippi resulted from an earlier MCS that traversed that area during the daytime hours of June 11.)

120611_rpts Reports Graphic

 

 

Homer, Louisiana Storm Damage
  • An automated observing station near Homer reported a 74 mph wind gust at 4:58 AM as the leading edge of the storm was moving through.
  • About 4,000 customers were without power in the area.
  • 12 homes were destroyed, 30 or more sustained severe damage, and 100 or more homes received minor damage.
  • Numerous trees and power lines were downed in the area.
  • Power outages resulted in a boil-water order for the town and surrounding area.
  • There were NO serious injuries, due in part to residents heeding the Severe Thunderstorm Warning that was in place for Claiborne Parish. The sheriff's office made the decision to sound the emergency sirens 15 minutes before the storm's onset, which caused residents to become aware of the situation.

 

Homer, LA

A large tree was snapped in the storm winds. In the foreground, notice the power lines that were downed.

 

Homer, LA

A section of power lines downed in the storm.

 

Homer, LA

This was one of a number of vehicles crushed by large trees.

 

Homer, LA

A front porch was blown away from the front of this home in the winds.

 

Homer, LA

Several large trees were snapped like twigs.

 

Homer, LA

This travel trailer was flipped and destroyed.

 

Homer, LA

This truck was flattened by a massive tree, which also fell on this homeowner's home and boat.

 

Homer, LA

This home was nearly split in half by a large tree.

 

Significant Rainfall Totals

  Inches

Homer, LA (Homer RAWS)

4.56"

Magnolia, AR

3.59"

Hope, AR (3 NE)

3.37"

Shreveport, LA (Regional Airport)

2.25"

Monroe, LA (Regional Airport)

2.07"

Below is a graphical representation of how much rain fell across the area. The scale on the left hand side of the image shows the amounts.

 

 

 

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