Thunder Rolls in with a Splash: Stormy Start Gives Way to Steamy Afternoon
THUNDER BAY – WEATHER – If you woke up to the sound of rumbling skies and sheets of rain splattering the windows, you’re not alone—Thunder Bay is living up to its name this Saturday morning. At 6:30 AM EDT, a thunderstorm with light rainshowers is drenching the city, with the temperature holding at 13.5°C. The humidity is maxed out at 100%, thanks to the thick moisture in the air, and visibility has dropped to just 5 km. The barometric pressure sits at 100.8 kPa and is on the decline. Winds are from the west-southwest at 13 km/h, but expect that to pick up.
Today: Morning Thunderstorms Then Steamy Skies
The morning thunderstorms and rain—expected to bring 15 to 25 mm of moisture—will taper off by noon, making way for a mix of sun and cloud. Once the clouds thin, things will heat up quickly, with temperatures soaring to 27°C this afternoon. Add a humidex of 34, and it will feel downright tropical. Winds will shift to the west and gust up to 40 km/h, adding a little bluster to your barbecue plans. The UV index hits 7, so don’t skimp on the sunscreen once the sun returns.
What to wear? Waterproof shoes and a rain jacket to start the day. By afternoon, you’ll want breathable fabrics and maybe a portable fan.
Tonight: Muggy and Moody
Expect skies to remain mainly cloudy tonight, with a 40% chance of more showers later in the evening and a risk of thunderstorms lingering. Fog patches will roll in again overnight, wrapping Thunder Bay in a misty blanket. Winds will ease and the temperature will dip to a mild low of 12°C.
Sunday Outlook: Soggy Start, Moderate Finish
Sunday won’t exactly be a beach day. The day begins cloudy with a 40% chance of showers and risk of a thunderstorm, although fog patches should dissipate by mid-morning. The high will reach a comfortable 22°C, with a humidex of 27, and a moderate UV index of 4—a break from today’s sunburn risk.
Sunday night keeps the clouds and 40% chance of showers, with a low of 15°C.
Looking Ahead: Settling into Summer
Monday offers a sunnier disposition with a mix of sun and cloud and just a 30% chance of showers. Temperatures will climb to 25°C, which will feel just right for kicking off a new week. The skies are expected to clear Monday night, bringing a refreshing low of 10°C.
Thunder Bay Weather Trivia 🌩️
Did you know? Thunder Bay averages 24 days of thunderstorm activity a year—most of it between May and August. That “boom” you heard this morning? Just nature reminding us who’s in charge.
