High winds are the problem. The light brown areas are under high wind warnings.
The maroon areas in Texas and New Mexico are wild fire warnings.
There is a risk of delays at both Dallas airports due to strong winds this afternoon. Winds are currently gusting as high as 62 mph in west central Texas.
The northern Plains have winter weather advisories. Very active weather day in the central third of the U.S.
UPDATE: Here is a color weather satellite image of the developing dust storm from the University of Wisconsin Space Science and Engineering Center. I have denoted the edges of the dust with arrows.
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