The National Weather Service is warning of possible small-stream flooding and flooding of already-saturated fields and poor drainage areas in the St. Lawrence Valley due to what the NWS calls “a long-duration precipitation event.”

The rain is expected to taper off some later this afternoon but persist through tomorrow morning, before picking up again Thursday afternoon.

Temperatures today and tonight are expected to stay in the 50s before warming to about 70 Wednesday.

The humidity and cool temperatures will make for some patchy fog today, tonight and Wednesday night, according to the NWS.

The outlook for Saturday and Sunday looks good, with sunny skies and temps in the 70s predicted.

To keep an eye on the rain clouds and check out forecasts for our area or anywhere in the country, you can visit our weather page. 

The NWS forecast for the St. Lawrence Valley and northwestern Adirondacks:

• This Afternoon: Occasional rain. Patchy fog. High near 58. Northeast wind around 9 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

• Tonight: Occasional rain. Patchy fog. Low around 52. North wind 7 to 10 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

• Wednesday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 70. North wind 6 to 8 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

• Wednesday Night: Patchy fog after 9pm. Otherwise, mostly clear, with a low around 55. Calm wind.

• Thursday: A 50 percent chance of rain after 9am. Mostly cloudy, with a high near 68. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.

• Thursday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 52. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

• Friday: A 30 percent chance of showers. Partly sunny, with a high near 70. Northwest wind 6 to 11 mph.

• Friday Night: A 30 percent chance of showers. Mostly clear, with a low around 47. West wind 5 to 8 mph.

• Saturday: Sunny, with a high near 72. West wind 5 to 10 mph.

• Saturday Night: Mostly clear, with a low around 51. Southwest wind around 6 mph.

• Sunday: Mostly sunny, with a high near 73. Southwest wind 7 to 11 mph.

• Sunday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 56. Southwest wind 5 to 8 mph.

• Monday: A 30 percent chance of showers. Mostly cloudy, with a high near 75. South wind around 9 mph.