This morning the center of an Arctic air mass was sliding through the upper Midwest states. A portion of that air had, however, found its way southward into Oklahoma and Texas. Early morning temperatures were in the teens across northern Oklahoma, and 20s in southern Oklahoma and North Texas. Winds were not strong, at only 5 to 12 mph, but this will place wind chill temperatures about 5 to 10 degrees colder than the air temperature. At 830 am, wind chill temperatures were as cold as 5 to 15 degrees above zero in much of northern, central, and western Oklahoma. With full sunshine, temperatures will warm into the 30s and 40s by 11 am. Afternoon highs will range from the low 40s to around 50 degrees.