Aurora Outlook and Prediction for London, Ontario
Did you mean: London, England, United Kingdom?
Kp: 0 | Bz: 1.35
Best Viewing Window: 5:14 AM – 6:39 AM EDT (1h 25m) · peak hours typically 11:29 PM – 3:29 AM
Best Viewing Window:
5:14 AM – 6:39 AM EDT Space Weather Now
Timing: Now · Signal Strength: High
Webcam
No aurora cams nearby. Center on nearest camera (848 km away).
Browse other webcams on Windy3-Day Forecast for London, Ontario
Sep 16
Kp 3.3 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: 5:00 AM–8:00 AM EDT
35% chance of elevated activity · Kp 3.33 during viewing window, up to Kp 5 depending on CME timing
Sep 17
Kp 3.7 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: 8:00 PM–11:00 PM EDT
35% chance of elevated activity · Kp 3.67 during viewing window
Sep 18
Kp 2.7 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: 8:00 PM–11:00 PM EDT
20% chance of elevated activity · Kp 2.67 during viewing window
Aurora Oval & Satellite & Sun
Interactive Aurora Globe
Satellite View
Sunspots
Current sunspot number: 23
Coronal Mass Ejections
Aurora Photography by Todd Salat
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Solar Wind & IMF (GSM)
- Bt
- 4.2 nT
- Bx
- 3.9 nT
- By
- 0.7 nT
- Bz
- 1.35 nT
- Clock Angle θ
- 18.7°
- Cone Angle φ
- 10.1°
- Speed
- 471 km/s
- Density
- 3.3 p/cc
IMF Detail (GSE) & Source
- Bx
- 3.9 nT
- By
- -0.1 nT
- Bz
- 1.5 nT
- θ Angle
- 20.6°
- φ Angle
- 348°
- Satellite
- SOLAR-1
- Data Quality
- Good
- Reading Time
- Sep 17, 5:08 AM EDT
Geomagnetic Indices
- Kp (now)
- 0
- Dst
- -4 nT
- HPI
- 7 GW
- Sunspot Number
- 23
Aurora Model
- Ovation Value
- 0
- Ovation Label
- None
- Model Data Time
- Sep 17, 5:57 AM EDT
- 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
- 2% · Clear
- Clouds, Next Dark Window
- 5% · Clear · ×1.00
- Aurora Visibility Tonight
- 10 · Poor (Outlook Tonight 10 × cloud 1.00)
- Solar Elevation
- -20.7° · Dark Night
- Moon Phase
- Waxing Crescent
- Moon Illumination
- 31%
- Moon Altitude
- -71° · Below Horizon
- Latitude
- 42.98339
- Longitude
- -81.23304
- Geomagnetic Latitude
- 52.2°
- Horizon Threshold
- Kp 6
- Overhead Threshold
- Kp 8
Prediction Model Inputs
- Bz Persistence (60min)
- 1.7 nT
- Newell Coupling
- 205
- Latitude Gate
- 0.00 now · 0.50 tonight (horizon Kp 6)
- Dynamic Pressure
- 1.2 nPa
- Storm Watch (CME)
- ~0h · G1 (Minor)
- Watch Predicted Kp
- 5
Timing & Signal Strength
- Timing
- Now
- Signal Strength
- High
- L1 Delay
- ~53 min
- Magnetic Midnight
- 1:29 AM (peak hours 11:29 PM – 3:29 AM)
- Best Viewing Window
- 5:14 AM – 6:39 AM EDT (1h 25m)
3-Day Kp Forecast
| EDT | Sep 17 | Sep 18 | Sep 19 |
|---|---|---|---|
| 8:00 PM–11:00 PM | 4 | 3.67 | 2.67 |
| 11:00 PM–2:00 AM | 4.67 | 2 | 2 |
| 2:00 AM–5:00 AM | 3.67 | 2 | 2.33 |
| 5:00 AM–8:00 AM | 3.33 | 2.67 | 2.33 |
| 8:00 AM–11:00 AM | 3.33 | 2.67 | 2.33 |
| 11:00 AM–2:00 PM | 3.33 | 2.67 | 2.33 |
| 2:00 PM–5:00 PM | 3.33 | 2.67 | 2.33 |
| 5:00 PM–8:00 PM | 3.33 | 3 | 2.67 |
| Max | 4.67 | 3.67 | 2.67 |
| Ap Index | 22 | 12 | 10 |
Storm Probability
| Level | Sep 17 | Sep 18 | Sep 19 |
|---|---|---|---|
| Active | 35% | 35% | 20% |
| Minor storm | 45% | 20% | 5% |
| Moderate storm | 10% | 5% | 1% |
| Strong-Extreme storm | 1% | 1% | 1% |
Planetary K-index
Interplanetary Magnetic Field Bz1.9 nT now
Southward (negative) Bz favors aurora. Observed data only, no forecast product exists for Bz.
Total IMF Field Bt4.3 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 Trend20 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 above 70, yellow 50-70, teal below 50 - same thresholds used everywhere else on this page. Dashed line is the overall trend.
Dst History-4 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
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