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              Active Winter Storm, Blizzard, Ice Storm, Winter Weather, Wind Chill, and Lake Effect Snow polygons from api.weather.gov. Default on Nov–Mar.

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              Weather data and observations displayed on this site are sourced from the National Weather Service (NWS) and the IEM Mesonet API (Iowa Environmental Mesonet, Iowa State University). This site is not affiliated with or endorsed by the NWS or IEM. Data is provided as-is, with no guarantees regarding accuracy, timeliness, or completeness. Always consult official sources during severe weather events.

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              Choose a type, then year → month → day. Times match maps for that date.