TULSA, Oklahoma - The National Weather Service has issued a tornado watch for much of Northeastern Oklahoma including Tulsa, Creek, Mayes, Okmulgee, Rogers and Wagoner counties through 11 p.m. Sunday.

Very large hail, damaging winds and tornadoes are possible.

Residents are advised to stay weather aware and have a safety plan in place as the threat of severe weather bears down on Green Country.

Northeastern Oklahoma is expected to be at risk starting in the late afternoon and evening hours Sunday and again on Monday, according to News On 6 WARN Team meteorologist Dick Faurot.

"All modes of severe weather will be possible, and due to the prolonged nature of this event there may well be some flooding rains by the time it is all said and done as well," Faurot said in his weather blog.

"So far the hail has been the big story," Faurot said, after the first round of storms in western Oklahoma Saturday.

A gust front made its way into eastern Oklahoma in the overnight hours Sunday morning, with high winds doing some minor damage. Public Service of Oklahoma reports that as many as 2,000 customers were without power.

PSO spokesperson Andrea Chancellor said contingency planning is in place for the severe weather threat.

"We had internal notice yesterday that the storms were coming through late tonight into tomorrow, and we're all on standby waiting to see where and when it happens," she said Sunday morning.

"We all know what our jobs are going to be."

Residents are advised to have a severe weather plan ready to go and be sure to have a way to receive warnings this afternoon. Keep checking back with NewsOn6.com for updated weather information as the front approaches.

You can track the storms as they develop with News On 6's interactive live radar.

And NewsOn6.com has severe weather safety tips you might want to check out before the storms reach northeastern Oklahoma.