Low pressure will move from the Great Lakes across southern Ontario today. A mild southwesterly flow across our area has helped to push temperatures above freezing across the area. Temperatures will continue to rise through the afternoon reaching highs in the low to mid 40s. Scattered rain showers will continue through the afternoon as well.
The mild southwesterly flow will continue tonight and Tuesday as another low pressure system moves into the Great Lakes. There will be a chance of showers tonight and Tuesday, but all precipitation should be in the form of rain. Lows tonight will fall to around 40 with highs on Tuesday in the low to mid 50s.
Tuesday night, winds will begin to pick up across the region as a strong cold front approaches form the west. Lows Tuesday night will be in the 40s with the threat of rain showers.
Showers will increase in coverage and intensity Wednesday morning as the front approaches. The front could be accompanied by a band of heavy rain, gusty winds, and perhaps a thunderstorm or two. Temperatures will surge into the mid 50s Wednesday morning ahead of the front, then drop sharply Wednesday afternoon as the front moves to our east.
Much colder air will spread across the region Wednesday night and Thursday with some lake effect snow showers developing downwind of Lake Erie.
Cold, snowy weather will persist through the end of the week and into the weekend across the region.