Credit National Weather Service Tulsa This afternoon’s isolated thunderstorms will ramp up through the evening, meaning a threat of severe weather across northeastern Oklahoma. The National Weather Service in Tulsa expects several strong to severe storms as a cold front pushes a line of storms across Green Country. Severe potentials are expected to exit by late evening. Large hail up to 2 inches and greater, damaging wind gusts of 60 to 70 mph, and also a tornado threat will be possible across eastern Oklahoma and northwest Arkansas. Damaging winds are the main threat along the front. Areas south and east of the Tulsa metro are at a higher risk of severe weather.