STORM CENTRE: April 2-3, 2025

Advance Weather
Apr 1
2 min read

Updated: Apr 3

***THIS STORM CENTRE HAS ENDED. PLEASE VISIT OUR HOME PAGE FOR THE MOST UPDATED INFORMATION. THIS PAGE WILL REMAIN ON OUR WEBSITE AS AN ARCHIVE.***

LAST UPDATE: 9:15 AM | April 2, 2025

NEXT UPDATE: 4:00 PM | April 2, 2025

Discussion

April will be coming in like a lion for Southern Ontario, bringing weather conditions from one extreme to the next.

Wednesday will begin with some snow brushing through the region, not likely to accumulate much until it reaches Eastern Ontario. Snow will continue moving east and will transition to freezing rain and ice pellets.

Freezing rain is expected to remain fairly minimal in terms of impact, and will not be close to the ice storm this past weekend. Trace to 2 millimetres of ice accretion is expected for much of the region. Some areas in Central Ontario, the Bruce Peninsula and the Dundalk Highlands are likely to see 2 to 6 millimetres of ice accretion. Roads and sidewalks, especially those that are untreated, will become ice covered and slippery. The freezing rain will transition to rain by the afternoon and evening.

Multiple rounds of rain and thunderstorms are expected across Southwestern Ontario throughout much of the day. Thunderstorms will impact areas that see freezing rain by the afternoon and evening. Some thunderstorms during the day may bring some strong wind gusts. Due to the significant amount of rainfall, flooding is expected.

Severe thunderstorms are expected in Deep Southwestern Ontario during the evening hours of Wednesday. Heavy rainfall, strong wind gusts, and an isolated tornado are the main threats.

It will be quite windy for Wednesday and Thursday, with much of the region seeing wind gusts of 70 to 80 km/h between the two days. Further damage from areas affected by the ice storm is expected. Additional power outages will be possible.

Severe Weather Outlook

The Elevated risk area includes Windsor, Sarnia and Chatham. Threats within this area include rainfall of 60 to 80 millimetres, flash flooding, the risk for an isolated tornado, wind gusts up to 100 km/h, and hail 2 to 3 centimetres in diameter. Some modelling shows 40 millimetres of rain may fall within one hour in some areas. The main time frame for severe weather will be 5:00 PM to 12:00 AM.

Freezing Rain Outlook

Trace to 2 millimetres of ice accretion is expected across much of Central, Eastern and Midwestern Ontario. Some heavier accretion is expected through portions of Central Ontario, the Bruce Peninsula, and Dundalk Highlands, where 2 to 6 millimetres of ice accretion is expected.

Rainfall Outlook

50 to 60 millimetres of rain is expected in Southwestern Ontario. Local rainfall amounts will likely vary, depending where thunderstorms move through. The area highlighted in green may experience rainfall totals over 60 millimetres. This area will likely see flash flooding within thunderstorms.

Wind Outlook

The entire region is expected to see wind gusts of 70 to 80 km/h between Wednesday and Thursday. Areas near the Lake Huron shoreline are expected to see wind gusts of 80 to 90 km/h.