St. Lawrence County is under a hazardous weather outlook through 8 p.m. tonight.

Meteorologists at the National Weather Service say there is a 70 percent chance of severe thunderstorms, followed by thunderstorms likely later tonight. Lows are anticipated around 58 degrees.

Friday is predicted to be rainy and cooler, with 50 percent chances of showers during the day and highs around 73 and 30 percent chances of nighttime showers getting to lows around 54.

Saturday brings a 40 percent chance of daytime showers with highs around 68, and a partly cloudy night with lows around 51.

Sunday is predicted to be mostly sunny during the day with highs around 75 and a 40 percent chance of showers at night with lows around 58.

The detailed forecast for St. Lawrence County:

Thursday - Showers and thunderstorms likely. Some storms could be severe, with large hail, damaging winds, and heavy rain. Partly sunny, with a high near 80. Southwest wind around 15 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday night - Showers and thunderstorms likely before 1am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 58. Southwest wind 9 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday - A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 73. West wind 10 to 15 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday Night - A 30 percent chance of showers. Mostly cloudy, with a low around 54. Southwest wind 5 to 7 mph. New precipitation amounts of less than a tenth of an inch possible.

Saturday - A 40 percent chance of showers. Partly sunny, with a high near 68. West wind 8 to 11 mph. New precipitation amounts of less than a tenth of an inch possible.

Saturday Night

Partly cloudy, with a low around 51. West wind 5 to 7 mph.

Sunday - Mostly sunny, with a high near 75. West wind 5 to 8 mph, with gusts as high as 20 mph.

Sunday Night - A 40 percent chance of showers. Mostly cloudy, with a low around 58. Southwest wind around 7 mph.

Monday - Mostly sunny, with a high near 75. West wind around 7 mph.

Monday Night - Partly cloudy, with a low around 53. West wind around 5 mph becoming calm in the evening.

Tuesday - A 30 percent chance of showers. Mostly sunny, with a high near 73. Calm wind becoming north around 5 mph in the afternoon.

Tuesday Night - A 30 percent chance of showers. Mostly cloudy, with a low around 54. Light and variable wind.

Wednesday - Partly sunny, with a high near 74. Light and variable wind becoming north around 5 mph in the afternoon.

Wednesday Night - Partly cloudy, with a low around 54. Light and variable wind.

Thursday - Mostly sunny, with a high near 72. Northwest wind 3 to 6 mph.