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Midwest Gets Smoke Screen From Canada, Minnesota Fires

Farmers in the fields planting as far south as Missouri were greeted by an unusual sight Saturday morning. What started out as a slight haze in the air in the early morning strengthen by 10:00 am to a yellowish pall that restricted sight down to one-half mile in some locations.

That thick haze was the result of smoke, technically called pyrocumulus clouds, created by the massive forest fires in Alberta combining with smoke from fires ranging in northern Minnesota.

A strong southerly flowing jet stream collected the smoke blowing it down into the central Midwest in such concentrations that it triggered warnings about unhealthy air in these states. This image was generated by NASA’s Suomi-NPP satellite.

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