What's causing the brownish tint in this April snowfall?

Many people have noted this latest blast of snow seems a bit off - it almost seems to have a slight brownish tint.

It may be a bit of Texas falling with the snow.

National Weather Service meteorologist Todd Heitkamp says it may be dust and dirt that was blowing around Texas and Oklahoma earlier this week. As the storm strengthened, it may have ingested the dust, which then fell with the snow.

Heitkamp tells KSFY News this is just a theory, and the NWS cannot confirm it.