From the National Weather Service
At 9:08 p.m., radar indicated a large area of moderate to occasionally heavy rain across Oswego, Lewis and eastern Jefferson counties.
Radar estimates and spotter reports indicate two to four inches of rain has fallen across portions of Oswego and Lewis counties. One and a half to two and a half inches of rain has fallen across portions of eastern Jefferson county. An additional inch to two inches of rain is expected to fall tonight.
This additional rainfall will cause some creeks and streams to approach bankfull. Minor flooding in urban areas and areas with poor drainage is also possible.
Rainfall totals will vary by location, with areas most likely to see the heaviest rainfall being across eastern Oswego County from Constantia to Redfield, and the eastern slope of the Tug Hill near Lowville and Croghan. Ponding of water on area roads may result in a few road closures.
Instructions: Excessive runoff from heavy rainfall will cause elevated levels on small creeks and streams, and ponding of water on country roads and farmland along the banks of creeks and streams. A flood advisory means river or stream flows are elevated or ponding of water in urban or other areas is occurring or is imminent.