A temperature of -36°F was reported at Congerville 2NW, Illinois, on 5 January 1999, thus establishing a new state cold record. Congerville 2NW is located in the central region of Illinois in Woodford County at an elevation of 194 m. The weather station is on a farm in the flat bottom land along the Mackinaw River, where maximum and minimum temperatures are read daily at 0800 LST from liquid-in-glass max/mm thermometers in a cotton region shelter, all supplied by the National Weather Service (NWS). A snowstorm on 1-3 January 1999 was followed by an intensely cold and dry air mass. On the morning of the record, the observer called the NWS ILX office concerning the extreme temperature. The hydrometeorological technician on duty questioned the observer about the time of observation, location of equipment, any recent moves, validity of the thermometers, and whether the observer checked the backup thermometer for comparison. These checks verified that valid procedures were followed before, during, and after the record observation.
|Original language||English (US)|
|Number of pages||2|
|Journal||Bulletin of the American Meteorological Society|
|Publication status||Published - Dec 1 2000|
ASJC Scopus subject areas
- Atmospheric Science