000 SXUS75 KCYS 160740 RERSNY RECORD EVENT REPORT NATIONAL WEATHER SERVICE CHEYENNE WY 1235 AM MST TUE FEB 16 2021 ...RECORD LOW TEMPERATURE SET AT SIDNEY NEBRASKA AIRPORT... A RECORD LOW TEMPERATURE OF -25 WAS SET AT SIDNEY NEBRASKA AIRPORT YESTERDAY. THIS BREAKS THE OLD RECORD OF -18 SET IN 2007. $$