THUNDER BAY – WEATHER DESK – Northern Ontario’s Far North is sitting under high pressure this morning, and that’s showing up in generally calmer skies and improving visibility in several communities.

The trade-off is classic: as skies break and winds turn north and northwest, Arctic air digs in, setting up dangerous wind chills and a serious frostbite risk—especially along the Hudson Bay coast.

Today’s Weather Overview

Current Conditions (Saturday morning)

Ogoki Post / Marten Falls (Ogoki Post Airport, 8:00 AM EST)

• Mostly cloudy, -18.4°C

• Wind: E 8 km/h (wind chill -24)

• Pressure: 102.5 kPa

• Humidity: 81% | Visibility: 16 km

Neskantaga (Lansdowne House Airport, 8:00 AM EST)

• Cloudy, -16.7°C

• Wind: ENE 15 km/h (wind chill -25)

• Pressure: 102.3 kPa

• Humidity: 79% | Visibility: 16 km

Sandy Lake (Sandy Lake Airport, 7:21 AM CST)

• Sunny, -21.6°C

• Wind: Calm

• Pressure: 102.3 kPa

• Humidity: 85% | Visibility: 16 km

Big Trout Lake / KI (Big Trout Lake Airport, 7:00 AM CST)

• Light snow, -16.3°C

• Wind: SE 8 km/h (wind chill -22)

• Pressure: 102.4 kPa

• Humidity: 68% | Visibility: 16 km

Fort Severn / Wasaho Cree Nation (Fort Severn Airport, 8:00 AM EST)

• Mainly clear, -22.4°C

• Wind: ESE 11 km/h (wind chill -31)

• Pressure: 102.9 kPa

• Humidity: 85% | Visibility: 16 km

Weekend Forecast

Expected Conditions (next three days)

Ogoki Post / Marten Falls

• Today: Mainly cloudy, 30% chance of flurries, high -10°C (wind chill -25 this morning).

• Tonight: Mainly cloudy, 40% chance of flurries, north wind building late; low -17°C (wind chill -29, frostbite risk).

• Sunday: Cloudy, 30% chance of flurries in the morning, north wind gusting; high -17°C, wind chill near -33.

Neskantaga

Neskantaga is on the same forecast pattern as the Ogoki/Fort Hope/Lansdowne House corridor today and Sunday.

• Today: Mainly cloudy, 30% chance of flurries, high -10°C.

• Tonight: 40% chance of flurries, north wind gusting late; low -17°C, wind chill to about -29.

• Sunday: Cloudy, 30% chance of morning flurries, gusty north wind; high -17°C.

Sandy Lake

• Today: Periods of snow ending this morning, then cloudy with 40% chance of flurries, high -11°C.

• Tonight: Mainly cloudy, 40% chance of flurries, NW wind gusting; low -25°C (wind chill down to -36, frostbite risk).

• Sunday: Mainly sunny but bitter, high -25°C (wind chill near -37). Sunday night drops to -32°C.

Big Trout Lake / KI

• Today: Periods of snow (about 2 cm), high -12°C (wind chill improves from -24 this morning).

• Tonight: Cloudy, 40% chance of flurries, NW wind gusting; low -25°C (wind chill near -38, frostbite risk).

• Sunday: Mix of sun and cloud, clearing early afternoon; high -25°C with wind chill near -40 (frostbite in minutes). Sunday night: -35°C.

Fort Severn / Wasaho Cree Nation

• Today: Mainly cloudy, snow begins near noon, high -17°C (wind chill -34 this morning).

• Tonight: Snow ends near midnight, then cloudy with 40% chance of flurries; winds turn north and strengthen to 40 gusting 60, low -26°C with wind chill near -40 (frostbite in minutes).

• Sunday: Clearing, wind NW 30 gusting 50, high -26°C with wind chills near -45. Sunday night: -35°C.

Wardrobe Recommendations

This is a true deep-winter weekend across the region—dress for wind chill first, not the thermometer.

• Base layer: Thermal top + long underwear (synthetic or merino).

• Mid layer: Fleece or wool—avoid cotton.

• Outer layer: Windproof parka with an insulated hood.

• Hands/feet: Mitts (warmer than gloves), thick socks, insulated boots rated for extreme cold.

• Face protection: Neck gaiter/balaclava + goggles if you’re in Fort Severn or Big Trout Lake/KI Sunday (wind + cold = fast frostbite).

• Travel tip (remote roads/landing strips): Keep spare mitts, hand warmers, and an extra layer in your bag—cold injuries happen quickly when plans change.

Weather Trivia

A clear sky after a snowy period can actually make nights colder. Fresh snow reflects sunlight by day, but at night it helps the surface lose heat quickly, allowing temperatures to plunge—one reason places like Fort Severn and the western Hudson Bay coast can swing into -30s fast when skies clear.

Summary: Northern Ontario weather (Feb 21–23, 2026): Ogoki Post/Marten Falls, Neskantaga, Sandy Lake, Big Trout Lake/KI, and Fort Severn see flurries and light snow today, then a sharp push of Arctic cold with dangerous wind chills and frostbite risk, especially Sunday.