Rainfall warning in effect across midwestern Ontario

Dark storm clouds are seen over London, Ont. in this viewer-submitted image from July 2023. (Source: Cathy Pollak)

It’s a wet and gloomy day across the region. Environment Canada has issued a rainfall warning, affecting much of Midwestern Ontario, including London-Middlesex, Huron-Perth, Grey-Bruce, Sarnia-Lambton, and Elgin County.

Significant rainfall is expected, and the frozen ground has a reduced ability to absorb it, meaning there is an increased chance of flooding.

A low pressure system is bringing the rain Sunday. Light showers may linger into Monday, however, the majority of rainfall will fall through the day Sunday.

Rainfall amount of 30 to 45 mm is possible.

Meanwhile, the high is expected to hit 13 C Sunday, way above what’s normal for this time of year, which is around minus 2 C.

Here’s a look at the London, Ont. region’s forecast

Sunday: Cloudy. Rain at times heavy beginning early this morning. Fog patches dissipating early this morning. Amount 20 to 30 mm. Wind becoming east 30 km/h this morning then becoming south 30 late this afternoon. High 13.

Sunday night: A few rain showers changing to a few flurries or rain showers overnight. Risk of a thunderstorm early this evening. Rainfall amount 10 mm. Wind south 40 km/h gusting to 60. Low plus 1.

Monday: A few flurries or rain showers changing to a few rain showers in the morning and ending in the afternoon then cloudy. Wind west 30 km/h. High plus 5.

Tuesday: Cloudy with 30 per cent chance of showers. High plus 5.

Wednesday: Cloudy with 60 per cent chance of flurries. High plus 1.

Thursday: Cloudy with 30 per cent chance of flurries. High minus 2.

Friday: Cloudy with 30 per cent chance of flurries. High minus 3.