Thompson, Manitoba Weather Outlook – Sunday, October 12, 2025

THOMPSON MB – WEATHER – A powerful fall storm system is bringing dramatic weather changes to Thompson, Thicket Portage, and Pikwitonei, where a Snowfall Warning is in effect.

After a mild and damp start to the day, the system is forecast to deliver torrential rain transitioning to heavy snow by this evening, with accumulations of 15 to 25 cm possible by Monday night.

This storm marks a sharp and early transition toward winter across northern Manitoba, with strong winds, rapidly falling temperatures, and dangerous travel conditions developing through tonight.

Environment Canada Snowfall Warning Summary

• What: Heavy snowfall developing this evening and continuing through Monday.

• Expected Totals: 15–25 cm (locally up to 30 cm in higher elevations).

• Rainfall Before Transition: 20–30 mm possible.

• When: Beginning this morning as rain, switching to snow late this afternoon and evening.

• Impacts: Rapid accumulation, reduced visibility, and slippery roads.

• Winds: North 30–40 km/h gusting to 60 km/h, producing blowing snow.

Residents are advised to prepare for hazardous travel, and avoid unnecessary road trips during the height of the storm.

Current Conditions (as of 6:00 AM CDT – Thompson Airport)

• Temperature: 9.3°C

• Dew Point: 8.1°C

• Humidity: 92%

• Wind: WSW 4 km/h

• Pressure: 99.6 kPa (rising)

• Condition: Mostly Cloudy

• Visibility: 24 km

Sunday, October 12 Forecast

• Morning: A mix of sun and cloud, turning overcast near noon.

• Afternoon: Rain developing, with 5 mm expected.

• Wind: Becoming north 30 km/h gusting to 50 km/h near midday.

• Temperature: Falling sharply from 9°C this morning to +2°C by late afternoon.

• UV Index: 2 (low)

Tonight

• Rain changing to heavy snow this evening.

• Rainfall: 10–15 mm before transition.

• Snowfall: 10–20 cm possible overnight.

• Wind: North 40 km/h gusting to 60 km/h.

• Low: –2°C

• Wind Chill: Near –10 overnight.

❄️ Monday, October 13 – Thanksgiving Day

• Snow at times heavy, tapering through the afternoon.

• Snowfall: Additional 5–10 cm expected.

• Wind: North 30 km/h gusting to 50, becoming light later in the day.

• High: 0°C

• Wind Chill: Near –9°C in the morning.

Monday Night:

• Cloudy periods.

• Low: –6°C

🌤️ Tuesday, October 14

• Sunny and calmer as the storm departs.

• High: +5°C

Tuesday Night:

• Clear and cold.

• Low: –2°C

🧊 Weather Highlights

• Transition Day:

  • A dramatic drop in temperature this afternoon — from +9°C early to near freezing by evening.

  • Heavy rain turning to snow could cause flash freezing and hazardous travel conditions.

• Tonight into Monday:

  • Major snowfall event — expect 15–25 cm, strong winds, and blowing snow.

  • Travel not advised during peak snowfall and wind gusts overnight.

• Tuesday:

  • A welcome break with sunshine and calmer weather, though snow cover will remain.

🌨️ 5-Day Summary

🚗 Travel and Safety Advisory

• Avoid unnecessary travel tonight and Monday.

• If you must travel, carry a winter emergency kit, extra clothing, and food.

• Prepare for power flickers in rural areas as strong winds could impact lines.

• Road clearing operations may be delayed due to the rapid onset of snow.