DES MOINES, Iowa — From heavy snow to wind and frigid cold, Iowa is well-equipped to handle severe winter weather.
But some winter storms, known as "blizzards," can cause dangerous travel conditions for even the most hearty Midwest states.
According to the official National Weather Service definition, a blizzard is a winter storm where the following conditions occur for a period of three hours or longer:
- Sustained wind or frequent gusts to 35 miles an hour or greater; and
- Considerable falling and/or blowing snow that reduces visibility to one-quarter mile or less.
Contrary to popular belief, blizzards are not actually defined by the amount of accumulating snow, meaning some blizzards can occur with even small snow totals.
Consider Feb. 4, 2021, for example.
Blizzard conditions developed over parts of central Iowa, leading to a significant multi-vehicle crash in Jasper County, but most areas received 4" of snow or less in total.
Strong wind gusts led to almost zero visibility and significant blowing snow.
When conditions for an incoming winter storm favor blizzard conditions, the National Weather Service normally issues a Blizzard Watch or Blizzard Warning.
When blizzard conditions occur, travel on local roads and highways, especially in rural areas, can become treacherous or impassable.
Occasionally, the Iowa Department of Transportation is forced to close major thoroughfares, such as I-80 or I-35.
Stay weather aware this week!
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