Thunder Bay – Weather – Here we go AGAIN, a weather alert is in effect calling for more snow. A Colorado Low is headed into the region, and up to ten more unwanted centimetres of snow are likely.
Thunder Bay is closing out the weekend with a calm-looking evening, but the real story is what is lining up next. At 6:00 PM EDT at Thunder Bay Airport, the temperature was 1.0°C under mostly cloudy skies, with an east wind at 19 km/h, pressure at 101.5 kPa, humidity at 72%, and visibility at 32 km.
Environment Canada’s special weather statement says snow is expected to begin Monday afternoon and continue into Tuesday evening, with near 10 cm possible and visibility reduced in heavier bursts.
Today’s Weather Overview
Current Conditions
This is one of those Thunder Bay evenings that looks manageable at first glance, but hints at change. Temperatures are expected to fall steadily overnight, dropping from around 1°C early in the evening to about -8°C by 5:00 AM Monday. That means a refreeze is likely before the more organized snow arrives.
Extended Weather Forecast
Expected Conditions
Monday, March 30: Cloud will thicken through the morning, followed by a 30 percent chance of flurries in the afternoon. The high is expected to reach +1°C, with an east wind developing to 20 km/h late in the day and a morning wind chill near -10. Monday night turns more active, with a 40 percent chance of flurries in the evening before steadier snow begins near midnight. Around 2 cm is forecast overnight, with winds shifting northeast to 20 km/h and gusting to 40, and the low dipping to -4°C.
Tuesday, March 31: This looks like the roughest part of the stretch. Environment Canada calls for periods of snow and a daytime high of -3°C, while the special weather statement warns total snowfall near 10 cm is possible from Monday afternoon through Tuesday evening. Forecasters also note there is still uncertainty in the storm track, so the axis of heaviest snow could shift. Tuesday night stays cold, with cloudy periods, a 60 percent chance of flurries, and a low of -14°C.
Wednesday, April 1: April begins on a brighter note. Sunshine returns with a high of +1°C, followed by a clear and colder night with a low of -12°C.
Wardrobe Recommendations
For tonight, a warm jacket and gloves are still the right call because temperatures tumble quickly after sunset. For Monday night and Tuesday, it is back to full winter gear: insulated coat, hat, gloves, waterproof boots, and layers that can handle gusty wind and wet snow. Drivers and pedestrians should plan for slower travel as roads and walkways may become snow-covered, icy, and slippery.
Weather Trivia
A good reminder that spring arrives slowly on the north shore of Lake Superior: Environment Canada lists Thunder Bay’s late-March normals at 5°C for the daytime high and -7°C for the overnight low. So while this incoming snow feels like a rude encore from winter, it is still well within the city’s usual late-March range.
