Aurora Forecast and Prediction for London, Ontario
Did you mean: London, England, United Kingdom?
Kp: 2.33 | Bz: -2.11
Best Viewing Window: 6:25 AM – 6:30 AM EST (0h 5m) · peak hours typically 10:15 PM – 2:15 AM
Best Viewing Window:
6:25 AM – 6:30 AM EST Space Weather Now
Timing: Now
Webcam
No aurora cams nearby. Center on nearest camera (848 km away).
Browse other webcams on Windy3-Day Forecast for London, Ontario
Oct 31
Kp 2.7 is short of the roughly Kp 6 the aurora needs to clear the northern horizon from London.
Global: NOAA has issued a watch for this night (see below) - moderate planetary activity, aurora across the high-latitude zone.
CME Watch: G1 (Minor) · Kp 5 expected
Best time to look up: 4:00 AM–7:00 AM EST
25% chance of elevated activity · Kp 2.67 during viewing window, up to Kp 5 depending on CME timing
Nov 01
Kp 2.7 is short of the roughly Kp 6 the aurora needs to clear the northern horizon from London.
Global: Moderate planetary activity expected - aurora across the high-latitude zone, and lower with a good substorm.
Best time to look up: 10:00 PM–1:00 AM EST
25% chance of elevated activity · Kp 2.67 during viewing window
Nov 02
Kp 1.7 is short of the roughly Kp 6 the aurora needs to clear the northern horizon from London.
Global: Quiet planetary conditions expected - aurora mostly confined to the far north.
Best time to look up: 10:00 PM–1:00 AM EST
10% chance of elevated activity · Kp 1.67 during viewing window
Aurora Oval & Satellite & Sun
Interactive Aurora Globe
Satellite View
Sunspots
Current sunspot number: 24
Coronal Mass Ejections
Aurora Photography by Todd Salat
Original prints from Todd Salat's collection.
Catch of the Day
Seward, Alaska · 2023
Denali Spectacle
Denali Viewpoint South, Alaska · 2023
Denali Stars
Denali Viewpoint South, Alaska · 2018
Nerd Mode
Solar Wind & IMF (GSM)
- Bt
- 2.9 nT
- Bx
- 0.6 nT
- By
- 1.9 nT
- Bz
- -2.11 nT
- Clock Angle θ
- -46°
- Cone Angle φ
- 72.3°
- Speed
- 503 km/s
- Density
- 1 p/cc
IMF Detail (GSE) & Source
- Bx
- 0.6 nT
- By
- 2.7 nT
- Bz
- -0.9 nT
- θ Angle
- -18.2°
- φ Angle
- 77.6°
- Satellite
- ACE
- Data Quality
- Good
- Reading Time
- Nov 1, 6:21 AM EST
Geomagnetic Indices
- Kp (now)
- 2.33
- Dst
- -47 nT
- HPI
- 18 GW
- Sunspot Number
- 24
Aurora Model
- Ovation Value
- 0
- Ovation Label
- None
- Model Data Time
- Nov 1, 7:10 AM EST
- Ovation Data
- Live
Scores & Ratings
- Aurora Visibility
- 0 · Poor
- Aurora Visibility (w/ Moon)
- 0 · Poor
- Prediction Score
- 0 · Little to None
Sky & Location
- Cloud Cover
- 28% · Partly Cloudy
- Clouds, Next Dark Window
- 100% · Overcast · ×0.05
- Aurora Visibility Tonight
- 0 · Poor (Outlook Tonight 3 × cloud 0.05)
- Solar Elevation
- -6.7° · Nautical Twilight
- Moon Phase
- Waning Gibbous
- Moon Illumination
- 61%
- Moon Altitude
- 68.3° · Up
- Latitude
- 42.98339
- Longitude
- -81.23304
- Geomagnetic Latitude
- 52.2°
- Horizon Threshold
- Kp 6
- Overhead Threshold
- Kp 8
Prediction Model Inputs
- Bz Persistence (60min)
- -0.4 nT
- Newell Coupling
- 6773
- Latitude Gate
- 0.00 now · 0.06 tonight (horizon Kp 6)
- Dynamic Pressure
- 0.4 nPa
- Storm Watch (CME)
- ~0h · G1 (Minor)
- Watch Predicted Kp
- 5
Timing & Signal Agreement
- Timing
- Now
- Signal Agreement
- High (7 of 7)
- Do the live inputs point the same way as the score? A score lifted by this city's own Kp can read Low while the solar wind is calm.
- L1 Delay
- ~50 min
- Magnetic Midnight
- 12:15 AM (peak hours 10:15 PM – 2:15 AM)
- Best Viewing Window
- 6:25 AM – 6:30 AM EST (0h 5m)
3-Day Kp Forecast
| UT slot (EST) | Nov 01 UT | Nov 02 UT | Nov 03 UT |
|---|---|---|---|
| 00–03 UT (8:00 PM–11:00 PM) | 3.67 | 2.67 | 1.67 |
| 03–06 UT (11:00 PM–1:00 AM) | 3 | 2.33 | 1.33 |
| 06–09 UT (1:00 AM–4:00 AM) | 4.67 | 2.33 | 1.33 |
| 09–12 UT (4:00 AM–7:00 AM) | 2.67 | 2.33 | 1.33 |
| 12–15 UT (7:00 AM–10:00 AM) | 3.67 | 2.33 | 1.33 |
| 15–18 UT (10:00 AM–1:00 PM) | 3.33 | 2 | 1.67 |
| 18–21 UT (1:00 PM–4:00 PM) | 3 | 2.33 | 1.67 |
| 21–00 UT (4:00 PM–7:00 PM) | 3.33 | 2.67 | 1.33 |
| Max | 4.67 | 2.67 | 1.67 |
| Ap Index | 20 | 10 | 5 |
Columns are NOAA's UT days, so in EST a column's first rows fall on the previous local evening.
Storm Probability
| Level | Nov 01 UT | Nov 02 UT | Nov 03 UT |
|---|---|---|---|
| Active | 25% | 25% | 10% |
| Minor storm | 35% | 5% | 1% |
| Moderate storm | 20% | 1% | 1% |
| Strong-Extreme storm | 5% | 1% | 1% |
Planetary K-index
Interplanetary Magnetic Field Bz-2.1 nT now
Southward (negative) Bz favors aurora. Observed data only, no forecast product exists for Bz.
Total IMF Field Bt2.9 nT now
Total interplanetary magnetic field strength - the ceiling on how negative Bz can go. A rising Bt alongside a still-fluctuating Bz often leads a stronger southward turn. Observed data only, no forecast product exists for Bt.
Global Storm Trend37 global now
Global (hemisphere-wide, not this city) prediction score over the last 24 hours, logged every 5 minutes - may differ from the Prediction ring above, which is specific to this location and time of night. Red from 60 (Strong), yellow from 40 (Moderate), teal below - the same cutoffs as the Prediction ring. Dashed line is the overall trend.
Dst History-47 nT now
Kyoto Dst geomagnetic storm index over the last 24 hours. Negative = ring-current energy stored = an active storm, not just predicted. Red below −50nT, yellow −20 to −50nT, teal above −20nT.
Solar Wind Speed & Pressure
Each line is scaled independently to its own 24h range (different units) - watch the shape, not a shared axis. A rising speed line or a pressure spike can signal an incoming stream or shock before Bz/Dst move.
Nerd Mode: See what’s really driving the score. Live solar wind, Bz, Kp, Dst, CME timing, and more. Data comes from NOAA SWPC and the Kyoto WDC, with a few metrics calculated here from the raw data. Live data refreshes every minute; trend charts every five.
Aurora Forecasts for Nearby Cities
Checking conditions somewhere else tonight? These are the closest cities with their own northern lights prediction.
- Kitchener 76 km
- Hamilton 116 km
- Erie 134 km
- Brampton 142 km
- Mississauga 144 km
- Windsor 164 km
- Detroit 165 km
- Toronto 169 km
Related Northern Lights Pages
Browse all prediction cities →
