Weather Trivia for Illinois llinois is known for its wide variety of weather. Through the assistance of the Illinois State Water Survey and the National Weather Service offices that serve Illinois, here is a look at small bits of weather trivia for each day of the year. The central part of Illinois is emphasized, but significant weather events elsewhere in the state are included. December NWS Mission Statement Provide weather, hydrologic, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy. NWS data and products form a national information database and infrastructure which can be used by other government agencies, the private sector, the public, and the global community.
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