Heavy rain is expected for the region with some areas getting as much as 50 milimetres.
UNITED COUNTIES of SD&G, Ontario - Environment Canada is warning of heavy rains this evening.
The Special Weather Statement is calling for rain with periods of heavy rain is expected in Cornwall, Newington, Lancaster, Maxville, Alexandria and Winchester areas.
"A line of heavy showers has developed over Eastern Ontario," the statement reads. "Brief heavy downpours are expected within these showers. Areas that receive multiple showers could see 20 to 40 mm by later this evening."
The rain is projected to end before tomorrow morning.