CASPER, Wyo. (AP) - A cold system has pushed temperatures more than 30 degrees below zero (minus 34.4 Celsius) in parts of Wyoming, the National Weather Service said.
Several parts of the state experienced the low temperatures Thursday morning, The Casper Star-Tribune reports.
A temperature of minus 36 (minus 37.7 Celsius) was recorded in the Sublette County community of Daniel, the weather service said.
Other areas in the state that experienced bracing cold included Grant Village in Yellowstone National Park where the temperature dropped to minus 34 (minus 36.6 Celsius) and Fossil Butte National Monument where the temperature was minus 31 (minus 35 Celsius).
Elk Mountin saw minus 29 (minus 33.8 Celsius), Afton fell to minus 27 (minus 32.7 Celsius) and the temperature at the famed Old Faithful geyser in Yellowstone was minus 26 (minus 32.2 Celsius). The area near Farson was minus 24 (minus 31.1 Celsius) while Independence Rock was minus 20 (minus 28.8 Celsius).
In western Wyoming, regulators declared an ozone action day for the Upper Green River Basin.
Ozone action days are called by communities experiencing weather conditions that affect the air in ways that may cause health problems.
Emissions mixed with cold temperatures can result in higher concentrations of ground-level ozone.
Please read our comment policy before commenting.