THUNDER BAY – November 4, 2026
Thunder Bay and Kakabeka Falls are on washout watch Wednesday, with a yellow rainfall warning in effect, saturated ground that has little capacity left to absorb more rain, and about 50 millimetres of additional rain expected through Thursday. Environment Canada says the rain raises the risk of ponding on roads and of washouts near rivers, creeks and culverts, on top of a multi-day event in which some locations have already received as much as 50 millimetres and totals near 80 millimetres are expected before the system clears.
Wednesday’s forecast is the heavy middle of that event. Environment Canada called for 30 to 40 millimetres of rain during the day in the Thunder Bay area, with temperatures steady near 10 degrees and a northeast wind of 20 kilometres per hour becoming light early in the afternoon. Another 10 to 20 millimetres was forecast for Wednesday night, with north winds rising to 20 kilometres per hour and gusts to 40, and an overnight low near 3 degrees. At Thunder Bay Airport in the early morning hours — light rain, 11.9 degrees and eight kilometres of visibility at the 2:18 a.m. EST observation — the system was already well established before the workday began.
The state of the ground is what turns a heavy-rain day into a washout risk. The rain falling
Wednesday is landing on soil and ditches already saturated by the earlier part of the system on Monday and Monday night, when some locations picked up as much as 50 millimetres. Saturated ground absorbs slowly, so a larger share of Wednesday’s rain runs off — into creeks and rivers that are already high, through culverts already carrying a heavy load, and across low sections of road where drainage can be overwhelmed. That is the mechanism behind the warning’s specific hazards: water ponding on roads and in low-lying areas, and washouts where fast-moving water undercuts a shoulder, a gravel road or a culvert crossing.
The local picture Wednesday morning matched the warning. NetNewsLedger, reporting from
Thunder Bay at the start of the day, described rain pouring down around 5:00 a.m. and Red River Road carrying enough flowing water to look almost like a pair of small creeks. City streets move water quickly compared with the rural network around Kakabeka Falls and the Township of O’Connor, where gravel shoulders, driveway culverts and small water crossings are the first places a washout typically shows. No major flooding incidents had been widely reported by early Wednesday, but the warning period runs through Thursday, and the heaviest remaining amounts were still falling.
This is the second low-pressure system of a wet week for the northwest, and it has been tracked in stages — special weather statements earlier in the week as the first system delivered 25 to 50 millimetres in places, then escalating alerts as the second system arrived. Rainfall warnings elsewhere in the region, including for Nipigon and the Greenstone area, remained in effect Wednesday with similar totals expected, and a special weather statement continued for the Armstrong area. The pattern matters because it is cumulative: each additional round of rain falls on a landscape that has had no chance to drain from the last one, which is why forecasters frame the risk around runoff and washouts rather than rainfall amounts alone.
For drivers, the practical advice through Thursday is the standard heavy-rain guidance, and it applies with particular force on the highways west and east of the city and on the rural roads around Kakabeka Falls. Water ponding on a road can be deeper than it looks and can hide a washed-out section entirely; a flooded or undermined crossing should never be driven through. Reduced visibility in heavy rain, standing water at highway speed, and debris or gravel washed onto paved surfaces are the more routine hazards. Anyone travelling should check current road conditions before setting out, and anyone who encounters a washout or a flooded road should report it rather than testing it.
The turn in the weather, when it comes, is expected to be sharp. Colder air arrives behind the system on Thursday, with temperatures dropping as the rain ends, and a sunny Friday is in the forecast for the Thunder Bay area — an abrupt change from a week in which the region has been near or in double digits under persistent rain. Between now and then, Environment Canada can expand, downgrade or end the warning as the system’s track settles, and conservation authorities and the Ministry of Natural Resources remain the contacts for flooding information. RL News will update this story as the warning changes and as any washout or road impacts are confirmed.
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