Thunder Bay remains under a Yellow Rainfall Warning this morning as heavy rain continues across the city. Environment Canada says frozen ground has a reduced ability to absorb the rainfall, increasing the risk of water pooling on roads and in low-lying areas.

There is a Flood Watch issued by the Lakehead Region Conservation Authority.

Today’s Weather Overview

Current Conditions

At 6:00 AM EDT at Thunder Bay Airport, it was 3.7°C with a light rainshower. Winds were from the ENE at 30 km/h, gusting to 46 km/h, making for a raw and blustery start to Friday.

Humidity was 88%, the dew point was 1.9°C, pressure was 100.3 kPa and falling, and visibility was 24 km.

Rainfall Warning

Environment Canada’s Yellow Warning – Rainfall remains in effect for the City of Thunder Bay.

The warning calls for total rainfall amounts of 30 to 50 mm, continuing until this evening. A stalled cold front is keeping rain, heavy at times, over the area today before the system moves out by evening.

Water will likely pool on roads and in low-lying areas. Drivers should avoid flooded roadways and watch for washouts near rivers, creeks, and culverts.

Extended Forecast

Expected Conditions

Today will bring rain, with another 10 to 20 mm possible. Winds will be from the east at 30 km/h, and the high will reach 8°C.

Tonight will be mainly cloudy with a 40 percent chance of showers or drizzle this evening and after midnight. The low will drop to 1°C.

Saturday looks brighter. Cloudy skies will become a mix of sun and cloud in the morning, with east winds developing near 20 km/h in the afternoon. The high will reach 12°C.

Sunday stays cloudy with a high of 11°C and a low near 3°C Sunday night.

Wardrobe Recommendations

A waterproof jacket, warm layers, and water-resistant footwear are the best choices today. Umbrellas may be difficult to manage in the gusty east wind, so a hooded rain shell is more practical.

Weather Trivia

Thunder Bay’s spring weather is often shaped by Lake Superior. Cold lake waters can keep temperatures cooler near the shoreline, especially during damp easterly wind events like today.

Summary:
Thunder Bay weather report for April 24, 2026: Yellow Rainfall Warning continues with 30 to 50 mm of rain, gusty east winds, and pooling water possible on roads.