Oklahoma could be in a stormy weather pattern for several days.

The National Weather Service said a potent system that brought snow to parts of the Rockies will move over the nation's midsection beginning late Saturday and possibly produce rain and thunderstorms through Tuesday. Some of the storms may reach severe levels on Sunday.

Cloud cover and rain will help bring temperatures back down to or slightly below average, forecasters said.

On Saturday, skies were sunny in the west and partly cloudy in the east, where lingering clouds from overnight storms held temperatures down somewhat.

Highs ranged from 79 degrees in Tulsa and McAlester to 94 degrees in Altus, according to the weather service. The temperature topped out at 84 degrees in Enid and Oklahoma City.

Skies should be partly to mostly cloudy on Sunday, with a chance of showers and thunderstorms in western and north-central Oklahoma, forecasters said. Highs should reach the 70s and 80s. Storms are likely statewide Sunday night as low temperatures bottom out in the 50s and 60s.

Showers and thunderstorms will continue on Monday and possibly Tuesday, with highs topping out in the 70s and 80s on Monday and in the 70s on Tuesday. Lows should range from the 40s in the Panhandle to the middle 60s in southeastern Oklahoma Tuesday night, according to the weather service.

A chance of showers and isolated thunderstorms will linger in eastern Oklahoma on Wednesday, forecasters said. Temperatures should peak in the 70s and 80s before falling into the 40s and 50s Wednesday night.

Highs should reach the 70s and 80s on Thursday under partly cloudy skies, the weather service has predicted. Lows should again reach the 40s and 50s.