Winter weather advisory issued for entire weekend in St. Lawrence County; flooding possible Monday
Friday, April 13, 2018 - 5:36 pm

The National Weather Service has issued a winter weather advisory for the entire weekend followed by a flood watch on Monday and Tuesday.

Up to seven inches of snow and sleet possible are possible from 5 a.m. Saturday through 8 p.m. Sunday for all of St. Lawrence County with mixed precipitation expected.

The weather service is warning the expected snow and ice will result in difficult travel conditions and reduced visibility at times.

Temperatures should be in the 20s on Saturday and in the 30s on Sunday.

Then, from Monday afternoon through Tuesday afternoon, moderate to heavy rainfall will combine with snow melt, leading to the potential for localized flooding, the weather service says.

Rainfall amounts of 1.5 to 2 inches are expected with locally higher amounts possible.

Rivers and streams could see significant rises which could lead to flooding in low-lying areas and in areas of poor drainage, forecasters say.

The complete forecast through Tuesday for central St. Lawrence County follows:

Tonight, rain before 5 a.m., then rain, snow, and sleet likely. Low around 30. North wind 6 to 9 mph. Chance of precipitation is 100%. New snow and sleet accumulation of less than a half inch possible.

Saturday, rain and snow, becoming all snow after 7 a.m. Temperature falling to around 26 by 4 p.m. Northeast wind 13 to 15 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

Saturday night, snow likely, mainly before 7 p.m. Cloudy, with a low around 23. Northeast wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.

Sunday, snow and sleet likely before 2 p.m., then freezing rain and sleet likely between 2 and 3 p.m., then freezing rain likely after 3 p.m. Cloudy, with a high near 35. Northeast wind around 14 mph. Chance of precipitation is 60%. New snow and sleet accumulation of less than one inch possible.

Sunday night, rain. Low around 35. East wind 9 to 14 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Monday, rain, heavy at times. High near 52. East wind 11 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

Monday night, rain showers likely before 5 a.m., then a chance of rain and snow showers. The rain could be heavy at times. Cloudy, with a low around 35. East wind 7 to 10 mph becoming southwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%.

Tuesday, a chance of rain and snow showers before 10 a.m., then a chance of rain showers. Cloudy, with a high near 42. West wind 10 to 14 mph. Chance of precipitation is 50%.

Tuesday night, chance of rain showers before 10 p.m., a chance of rain and snow showers between 10 p.m. and midnight, then a chance of snow showers after midnight. Cloudy, with a low around 31. West wind 9 to 11 mph. Chance of precipitation is 40%.