Sarnia

Brief period of freezing rain possible Wednesday.

What:
Brief period of freezing rain with minor ice accretion on some surfaces possible.
Surfaces such as highways, roads, walkways and parking lots may become icy, slippery and hazardous.

When:
Wednesday morning to early Wednesday evening.

Additional information:
A brief period of freezing rain is possible before a transition to rain. For locations near Lake Ontario, temperatures will likely remain above the freezing mark.

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Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.

Rain, heavy at times is expected. The ground, already near saturation, has little ability to absorb further rainfall.

What:
Rain, at times heavy. Total rainfall amounts of 30 to 50 mm. Locally higher amounts are possible if thunderstorms repeatedly impact the same area.

When:
Wednesday morning through early Thursday morning.

Additional information:
Rain begins Wednesday morning over extreme southwestern Ontario before reaching the Golden Horseshoe Wednesday afternoon. With thunderstorms expected, rainfall amounts may exceed 50 mm over some areas, particularly over southwestern Ontario. Rain will end from west to east overnight into early Thursday morning.

For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit Ontario.ca/floods for the latest details.

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Localized flooding in low-lying areas is possible. Heavy downpours can cause flash floods and water pooling on roads.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or post reports on X using #ONStorm.

The day will start with partly cloudy with rain through the late morning hours, transitioning to rain with snow

You can expect partly cloudy in the morning, with rain in the afternoon

You can expect partly cloudy with rain in the morning, with snow in the afternoon

Expect a day of partly cloudy with clear spells

Forecasters are watching another weather-maker approach southern Ontario this week.Environment Canada has issued a special weather statement for the entire region, with some soaking rain likely throughout the southern part of the region, including freezing rain up north."Rain begins Wednesday morning over extreme southwestern Ontario before reaching the Golden Horseshoe Wednesday afternoon," read the statement. "With thunderstorms expected, rainfall amounts may exceed 50 millimetres over some areas, particularly over southwestern Ontario. Rainfall warnings may be required for some areas as the event draws nearer."Freezing rain is also possible across Bruce, Perth, and Huron Counties, with two to five millimetres of accretion on some surfaces.Rainfall warnings could be issued for some areas as the system gets closer. Some low-lying areas could experience flooding.

Midwestern

Windsor

Chatham

Rain (Photo by Doctor_bass/iStock/Getty Images Plus via Getty Images)

Heavy rainfall (photo by Tamara Thornton, Blackburn Media)

Sarnia's Canatara Park Beach Lifeguard Office. BlackburnNews.com (File photo by Melanie Irwin)

Sarnia police uniform logos. Photo courtesy Sarnia Police Service.

Sarnia City Hall. October, 2023 Blackburn Media photo by Melanie Irwin

Norm Perry Park phasing plan. Image courtesy of City of Sarnia, via. council agenda March 31, 2025.

More rain and freezing rain headed to the region this week

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