LA GRANDE, Ore. — The National Weather Service has no explanation for a snowfall that left an oily sheen on car windshields.
The La Grande Observer reports the Monday storm brought snow that left a light, thin, odorless sheen on glass surfaces.
The weather service's John Mittelstadt says his Pendleton office had never before received reports about oily snow.
Mittelstadt says the weather service usually isn't able to pinpoint a cause, but says snow will pick up particles in the air as it falls.
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