0/100
Aurora score
Low·0/100
Strong aurora activity and clear skies. Good conditions for observing the Northern Lights.
Aurora chance0%
Kp index0High activity
Cloud cover0%Mostly clear
Best time—Local time☾Darkness—Local time
LOCAL AURORA FORECAST
Northern Lights forecast for Thunder Bay, ON
Live Northern Lights forecast for Thunder Bay, ON, Canada at 48.4°N: current OVATION chance, local Viewing Score, cloud cover, best time and a 3-day outlook.
Kp index0High activityCloud cover0%Mostly clearBest time—Local timeNEXT 24 HOURS
Hourly forecast (tonight)
Viewing scoreCloud cover
18:00
18%
☁28%
-2°
19:00
24%
☁25%
-2°
20:00
34%
☁23%
-3°
21:00
48%
☁21%
-3°
22:00
63%
☁18%
-4°
23:00
74%
☁16%
-4°
00:00
82%
☁14%
-5°
Best
01:00
79%
☁13%
-5°
02:00
70%
☁15%
-5°
03:00
59%
☁17%
-5°
04:00
48%
☁19%
-4°
05:00
38%
☁22%
-4°
06:00
30%
☁25%
-3°
07:00
23%
☁28%
-3°
08:00
17%
☁31%
-2°
09:00
13%
☁35%
-2°
10:00
10%
☁38%
-1°
11:00
8%
☁40%
-1°
12:00
7%
☁43%
0°
13:00
7%
☁45%
0°
14:00
8%
☁42%
-1°
15:00
10%
☁38%
-1°
16:00
13%
☁34%
-2°
17:00
16%
☁30%
-2°
OUTLOOK
3-day forecast
Tonight21 Nov
☁ 18% · −5°
—Fri22 Nov
☁ 42% · −5°
23:30 – 01:00Sat23 Nov
☁ 71% · −3°
00:10 – 01:20LOCAL CONDITIONS
Weather
Cloud cover0%Mostly clear−5°
Temperature−5°CWind —≈
Humidity—Weather data from MET Norway◐
Moon34%IlluminationLOCAL VIEW
Aurora map
Thunder Bay, ON
48.38°, -89.25°
NOAA OVATION
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SPACE WEATHER
Space weather details
Kp index0
Solar wind speed482 km/s
Bz (IMF)−6.1 nT
Bt (IMF)7.3 nT
Proton density6.8 p/cm³
Aurora ovalNorthern Europe
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Detailed space weather dataABOUT THE LOCATION
Aurora in Thunder Bay, ON
Thunder Bay, ON sits at 48.4°N and is a lower-latitude aurora location. Visible events are more dependent on strong geomagnetic disturbances, expansion of the auroral oval and a clear dark sky.
Around Thunder Bay, ON, aurora visibility depends strongly on how far south the auroral oval expands. Clear, dark skies can make a major difference when activity reaches this part of Canada.
All times on this page use the local America/Thunder_Bay time zone. The forecast combines current auroral activity, predicted Kp, darkness, Moon conditions and local weather to estimate practical viewing conditions near Thunder Bay, ON.
Latitude48.4°N
Time zoneAmerica/Thunder_Bay
Aurora settingEvent-dependent aurora zone
FAQ — Thunder Bay, ON
How is Viewing Score calculated for Thunder Bay, ON?
Viewing Score is a local 0–100 estimate rather than an official NOAA probability. The current score starts from the aurora chance for Thunder Bay, ON; future hours adjust auroral activity using the predicted Kp.
Darkness, cloud cover and Moon illumination then modify the result. Cloud cover only affects the score when the “Include clouds in score” switch is enabled. Daylight can reduce the score to zero, while a bright Moon above the horizon applies a smaller penalty.