Severe winds generated a deadly dust storm and aided in the development of numerous wildfires over the Southern Plains on Saturday 4 April 2009. While damage reports have been limited on the west Texas South Plains, wind gusts up to 66 mph, blinding dust, and at least three wildfires impacted the local area.
Strong westerly winds began to blow over the South Plains late Saturday morning, as a potent upper air storm system progressed over Colorado and Kansas. The winds lofted vast amounts of dust which originated in fields along the Texas and New Mexico border near Clovis, and spread northeastward over the Panhandle. Near-zero visibilities were reported along U.S. Highway 60 in Parmer County. The blinding dust storm went on to contribute to numerous accidents along Interstate 40 near Amarillo, where media reports indicate up to ten injuries and one death in weather related accidents.
Saturday’s weather pattern was a chinook-type critical fire weather pattern, which has been associated some of the most intense wildfire outbreaks across the Southern Plains in recent years. The strong storm system that impacted the region was accompanied by intense lower and middle atmospheric winds, with 100 kt overspreading the Panhandle yesterday afternoon at an altitude of about 18,000 feet. These winds were partially transported toward the ground by subsiding air on the back side of the passing low pressure center. The strong downslope winds allowed relative humidities to plummet to between 5 and 15 percent as temperatures warmed to above seasonal levels. This, combined with the winds, provided for an environment that has been correlated to a “moderate” or “high” occurrence of wildfire evolution locally in west Texas.
A preliminary tally of storm reports for Saturday 4 April 2009 can be found by CLICKING HERE.