TULSA, Oklahoma - Temperatures are very cold this morning with readings in the lower 20s in some of the valleys of northern OK with the metro also experiencing some chilly conditions.   South winds will return today but remain somewhat light with highs in the mid to upper 50s north and lower 60s across southern OK.  Another weak front will enter northern OK Friday but the focus of the weather will be an upper level storm system located to the southwest of the state.   This will bring some rain back to the state Saturday along with cloudy and cool conditions.   Highs Saturday should stay in the 40s for most locations across eastern OK. 

The main upper level trough of interest is diving down the west coast this morning and will become cut-off from the upper air flow later tonight as the feature becomes anchored across the southwestern U.S. region.   A lead wave will eject into the state late Friday night into Saturday morning and will bring the precipitation back to the region by early Saturday morning.   While most locations should receive come rainfall Saturday, the higher likelihood after the morning hours will reside across the southern third of the state.   

As the first wave exits the area late Saturday into Sunday morning, the main upper level system will begin slowly ejecting to the northeast.   This will bring rain chances back to the eastern half of the state either late Sunday night or Monday morning to midday before exiting the area Monday night or Tuesday morning.   The temperatures during this period will be in the 50s for daytime highs.

Most data continue to offer a significant surge of much colder air moving southward out of northwestern Canada into the nation Tuesday night into Wednesday.   This leading edge of cold air will arrive sometime either late Tuesday night or Wednesday across northern OK with a chance for some precip followed by much colder air.   Temperatures may fall into the 30s by Wednesday afternoon and stay in the 30s for daytime highs Thursday.

Thanks for reading the Thursday morning weather discussion and blog.

Have a super great day!

Alan Crone