ARCTIC BLAST GOOOOOOOO!!!!!

[Dark Jaguar]

I wouldn't mind eventually just deciding one way or the other in terms of daylight savings time. You know, you can look up (or mathematically predict) the exact moment the sun rises and sets for every day of the year for your location, past, future, whatever, with I believe accuracy of up to a couple centuries.

And now for some information about Oklahoma climate as quoted from Wikipedia. Note that I've never heard a local refer to a "5th season".

Climate

Oklahoma is a state dominated by contrasting cold and warm air masses which collide east of the Rocky Mountains. As can be expected, this results in a wide range of weather throughout the state, ranging from a borderline humid subtropical climate zone near the southeast part of the state to a semi-arid climate in the High Plains of the panhandle. While there is some variation in temperature in the state, with the south portion on the Texas border averaging an annual mean temperature of 62 °F, and the panhandle averaging under 54 °F, the main climatic difference in Oklahoma is precipitation. The southeast corner of the state near the Ouachita Mountains averages over 52 inches of precipitation a year. Moving west from that point, the precipitation decreases rapidly- for each 10 miles traveled west, the precipation is approximately 1 inch less. The driest part of the state is the extreme western panhandle with less than 16 inch annually.

The most notable feature of Oklahoma's climate is, of course, its thunderstorms. While Oklahoma averages from 40-60 days of thunderstorms throughout the entire state, which is less frequent than thunderstorm activity in parts of the Southeast United States and the central Colorado Rockies, Oklahoma thunderstorms, which occur in what locals call a "fifth season" from April through July tend to among the most severe in the world. During this "fifth season" colliding cold and warm air masses turn the entire state, especially the central part of the state into the heart of Tornado Alley. Central Oklahoma is the most tornado-prone area in the world, not only in terms of number of tornadoes(which exceeds 10 per 10,000 square miles), but also in terms of intensity.[6] Some of the most severe tornadoes in history have occurred in Oklahoma, and it is no accident that the National Severe Weather Forecast Center is located in Norman. While central Oklahoma is the epicenter of Tornado Alley, other parts of the state are not immune.

Snowfall is common in Oklahoma every winter, although it is not extreme, ranging from an average of less than 4 inches in the southern part of the state to just over 20 inches on the Colorado border in the panhandle.