Early AM Storms Then Colder Air Later

A tornado watch will remain for the early morning hours, mainly pre-dawn for Tulsa metro, as a strong area of low pressure moves across far northeastern OK.  The wind shear and dynamics of the system is very strong and coupled with the proximity of the surface low moving across northern OK the threat cannot be ruled out. I'll attempt to post more later this morning but will need to monitor radar data for the next few hours. 

The colder air will arrive later today.