A Soaked Start to Tuesday After a Stormy Night
June 17 Weather Report – From Thunder and Downpours to Showers and Sun
Thunder Bay is waking up damp and misty this Tuesday morning after a dramatic overnight performance of thunder, lightning, and torrential rain. The rainfall warning has officially ended, but the puddles and damp lawns tell the tale of a night that didn’t hold back. Currently, it’s 15°C with 100% humidity, so your hair might be in for a wild ride today!
At 6:00 AM, conditions at the Thunder Bay Airport reported light rain showers and low pressure at 100.3 kPa (and still falling), with a northwest breeze at 9 km/h. Visibility holds steady at 16 km, though the sogginess in the air still lingers.
Today: Clouds, Showers, and Steamy Sunshine
The rain is expected to taper off early this morning, but don’t tuck away your umbrella just yet — the forecast calls for a 40% chance of additional showers under mostly cloudy skies. As the day progresses, northwest winds will ramp up to 20 km/h, pushing the mercury to a humid high of 26°C, with a Humidex of 31. And while clouds dominate, the UV index still clocks in at a potent 8, so sunscreen is a must if the sun breaks through.
Tonight: Hazy, Possibly Showery, and Calming
This evening brings a 40% chance of showers, followed by hazy skies overnight as the winds calm. Expect the temperature to dip to 12°C, setting the stage for a much drier midweek forecast.
Looking Ahead: Drier, Warmer, and Just a Bit Unpredictable
Wednesday, June 18, brings a refreshing mix of sun and cloud, with a high of 26°C and a Humidex of 29. It’ll feel summery but not oppressive. Wednesday night sees cloudy periods with a 30% chance of showers, dipping to a low of 11°C.
Thursday cools slightly, with a high of 20°C under a blend of sun and cloud. Friday turns cloudy again, with a high of 19°C and a 40% chance of showers sneaking in by the evening.
What to Wear
If you’re heading out today, water-resistant shoes and a light jacket or umbrella are good calls this morning. But with a humid high ahead, layers you can peel off are best. And yes, sunscreen is still essential — even if you feel like you’re in a post-shower carwash!
Weather Trivia – The Thunder Capital of Ontario?
While Thunder Bay may not officially hold the crown, the city has had its fair share of legendary lightning shows — especially in late spring and early summer. The region’s mix of warm Lake Superior breezes and cool northern air often brews up dramatic storms like last night’s spectacle. Fun fact: the city has recorded over 100 thunderstorm days per year during peak seasons in the past!
