May 11, 2011 Severe Storms


Event Summary
 
During the evening hours of May 10, a dryline was situated across the eastern Panhandles.  By the early morning hours of May 11, the dryline had retreated to the Texas and New Mexico state line, which allowed dew points in the mid 50s to lower 60s to surge westward overnight.  As moisture increased, an upper-level disturbance approached from the southwest and ignited thunderstorms across the South Plains.  The environment was supportive of severe weather with moderate elevated instability and mid-level dry air.  As these storms moved northeast, they produced damaging winds up to 60 mph across Amarillo, Canyon, and Borger, resulting in downed trees and power lines.

  

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