CLARKSVILLE, TN (CLARKSVILLE NOW) – Enjoy the rest of Sunday, because it’s about to get ugly, with thunderstorms moving in by Monday night.

A weak frontal boundary is expected to stall over the Clarksville area by Monday night, according to the National Weather Service. This could lead to some isolated strong to severe thunderstorms Monday afternoon into the overnight hours in Montgomery and surrounding counties

After that, a strong cold front will bring numerous showers and thunderstorms late Wednesday into Wednesday night.

“Some storms could be strong to severe. Timing and details still remain uncertain this far out in time, but the severe threat does appear to be increasing,” the NWS said.

Clarksville forecast

Here’s the day-by-day outlook.

Rest of today: Sunny. Highs in the mid 70s. South winds 10 to 15 mph with gusts up to 25 mph.

Tonight: Partly cloudy in the evening, then mostly cloudy with a chance of showers after midnight. Not as cool with lows in the upper 50s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 30 percent.

Monday: Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Highs in the upper 60s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 50 percent.

Monday night: Showers and thunderstorms likely. Lows in the lower 60s. South winds 10 to 15 mph. Chance of rain 70 percent.

Tuesday: Mostly cloudy. A chance of showers and thunderstorms, mainly in the morning. Highs in the upper 70s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 30 percent.

Tuesday night: Mostly cloudy. A slight chance of showers and thunderstorms in the evening, then a chance of showers after midnight. Lows in the lower 60s. Chance of rain 50 percent.

Wednesday and Wednesday night: Showers with a chance of thunderstorms. Highs in the upper 70s. Lows around 50. Chance of rain 80 percent.

Thursday and Thursday night: Mostly clear. Highs in the mid 60s. Lows in the lower 40s.

Good Friday: Mostly sunny. Highs in the upper 60s.

Friday night: Mostly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the upper 40s. Chance of rain 30 percent.