A heat advisory remains in effect for St. Lawrence County until 7 p.m. today with heat index values in the upper 90s expected, according to the National Weather Service (NWS).

Temps will be around 96 with heat index values of 99, forecasters say. There is a slight chance for a thunderstorm this afternoon.

Tonight the low will be around 72 with a 60% chance of thunderstorms, mainly after 10 p.m., the service says.

The high Saturday will be around 82 with a 70 percent chance of thunderstorms, NWS says.

Take extra precautions if you work or spend time outside, NWS says. When possible reschedule strenuous activities to early morning or evening.

Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational

Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments.

Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency. Call 911 if medical assistance is needed.

The forecast through Thursday is as follows:

Saturday

Showers likely, with thunderstorms also possible after 1pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 82. Calm wind becoming southwest 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night

Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 68. South wind 5 to 7 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

Sunday

Showers likely, mainly before 11am. The rain could be heavy at times. Partly sunny, with a high near 81. Southwest wind 7 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Sunday Night

A 40 percent chance of showers. Partly cloudy, with a low around 63. Southwest wind 5 to 9 mph becoming calm after midnight. New precipitation amounts of less than a tenth of an inch possible.

Monday

A chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 80. Light and variable wind becoming northeast 5 to 7 mph in the afternoon. Chance of precipitation is 60%.

Monday Night

Showers likely and possibly a thunderstorm before 9pm, then a chance of showers. Mostly cloudy, with a low around 62. North wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 60%.

Tuesday

A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 78. Southwest wind around 6 mph. Chance of precipitation is 50%.

Tuesday Night

A chance of showers and thunderstorms before 7pm, then a chance of showers between 7pm and 9pm. Partly cloudy, with a low around 61. South wind around 6 mph. Chance of precipitation is 50%.

Wednesday

Mostly sunny, with a high near 83. Southwest wind 7 to 9 mph.

Wednesday Night

Partly cloudy, with a low around 66. Southwest wind around 7 mph becoming south after midnight.

Thursday

A 40 percent chance of showers. Partly sunny, with a high near 87. South wind 3 to 7 mph.