Thunder Bay weather update for April 26, 2026: Special Weather Statement issued with 15-25 mm of rain expected Monday into Monday night, raising flood concerns Thunder Bay – WEATHER – If you’re fed up with the rainy forecast, this news won’t cheer you up. Thunder Bay is set for another round of unsettled weather, as Environment Canada has released a Special Weather Statement for the area. A developing system is predicted to bring considerable rainfall from Monday morning through to Monday night, leading to worries about water accumulation and possible flooding.
Current Conditions
As of 6:00 PM EDT at Thunder Bay Airport, the temperature stands at 6.1°C under overcast skies. Humidity is at 86%, with a dew point of 4.0°C, and light winds are coming from the ENE at 7 km/h. The barometric pressure reads 102.2 k Pa, suggesting fairly stable conditions-for now. Environment Canada has put out a Special Weather Statement for Thunder Bay and nearby regions. What to Expect: 15 to 25 mm of rain, with locally higher amounts possible Rain starting Monday morning and becoming heavier in the afternoon and evening The heaviest rainfall likely near Lake Superior Key Concerns: Water pooling on roads and in low-lying areas Reduced drainage due to frozen or saturated ground Risk of washouts near rivers, creeks, and culverts Drivers are advised to steer clear of flooded roads and stay vigilant for quickly changing conditions. Rainfall warnings may be issued if there’s increased confidence in higher totals.Expected Conditions
Tonight:Showers will decrease early this evening, leaving behind cloudy skies with a 30 percent chance of more showers overnight. Fog patches may form late tonight. Winds will pick up from the east at 20 km/h overnight, with a low temperature around 4°C. Monday, April 27:
Expect cloudy skies along with a 40 percent chance of morning and early afternoon showers before steady rain starts later in the day. We’re looking at rainfall totals between 5 to 10 mm throughout the day. Winds will come from the east at 20 km/h, gusting up to 40 km/h, with a high reaching around 9°C. Monday Night:
Rainfall will become heavier at times during the night, bringing an extra10 to 20 mm possible by morning. Winds will switch to northwest direction at 30 km/h, gusting up to 50 before dawn. The overnight low should be around 6°C. Tuesday April28:
A mixofsunandcloudswitha40percentchanceofshowersandahigharound13°C. Conditionswillbegin tostabilizeaftertheweather systemmovesout.Be sureto haveawaterproof jacketandgoodfootwear readyfor Mondayand Mondaynight. Gustywindsandsteady rainwill make umbrellas less useful, a hoodedrain shellwouldbe abetterchoice. Bepreparedforcooler, dampconditionsduringthis time. Spring rainslike this can have big impacts in Northern Ontario sincethegroundoftenremains partiallyfrozenorsaturatedfromsnowmelt. This decreasesabsorptionandraisestheriskofsurface runoff and localized flooding.
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