Aurora Forecast and Prediction for Calgary, Alberta
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Kp: 0 | Bz: -0.25
Best Viewing Window: 7:25 PM – 7:25 AM MDT (12h 0m) · peak hours typically 11:55 PM – 3:55 AM
Best Viewing Window:
7:25 PM – 7:25 AM MDT Space Weather Now
Timing: Tonight · Signal Strength: Low
3-Day Forecast for Calgary, Alberta
Oct 13
Kp 4 clears the roughly Kp 3 Calgary needs - aurora possible low on the northern horizon under dark, clear skies.
Global: Moderate planetary activity expected - aurora across the high-latitude zone, and lower with a good substorm.
Best time to look up: 9:00 PM–12:00 AM MDT
35% chance of elevated activity · Kp 4 during viewing window
Oct 14
Kp 3.3 is right around the roughly Kp 3 Calgary needs - a borderline night, worth a look to the north.
Global: Moderate planetary activity expected - aurora across the high-latitude zone, and lower with a good substorm.
Best time to look up: 9:00 PM–12:00 AM MDT
20% chance of elevated activity · Kp 3.33 during viewing window
Oct 15
Global: This night's forecast isn't in NOAA's 3-day window yet - check back closer to the date.
This night's forecast isn't available yet - check back closer to the date.
Aurora Oval & Satellite & Sun
Interactive Aurora Globe
Satellite View
Sunspots
Current sunspot number: 93
Coronal Mass Ejections
Aurora Photography by Todd Salat
Original prints from Todd Salat's collection.
Goddess of Dawn
Mile 135 Parks Highway, Alaska · 1996
Heart of Alaska
Glennallen, Alaska · 2024
Heaven and Earth
Eagle, Alaska · 1999
Solar Wind & IMF (GSM)
- Bt
- 9.3 nT
- Bx
- 2.3 nT
- By
- -9 nT
- Bz
- -0.25 nT
- Clock Angle θ
- -1.5°
- Cone Angle φ
- 284.2°
- Speed
- 608 km/s
- Density
- 5.9 p/cc
IMF Detail (GSE) & Source
- Bx
- 2.3 nT
- By
- -8.4 nT
- Bz
- -3.2 nT
- θ Angle
- -19.9°
- φ Angle
- 285.1°
- Satellite
- SOLAR-1
- Data Quality
- Good
- Reading Time
- Oct 13, 11:58 AM MDT
Geomagnetic Indices
- Kp (now)
- 0
- Dst
- -8 nT
- HPI
- 8 GW
- Sunspot Number
- 93
Aurora Model
- Ovation Value
- 0
- Ovation Label
- None
- Model Data Time
- Oct 13, 12:41 PM MDT
- Ovation Data
- Live
Scores & Ratings
- Aurora Visibility
- 0 · Poor
- Aurora Visibility (w/ Moon)
- 0 · Poor
- Prediction Score
- 28 · Weak Activity
Sky & Location
- Cloud Cover
- 97% · Overcast
- Clouds, Next Dark Window
- 81% · Scattered · ×0.50
- Aurora Visibility Tonight
- 14 · Poor (Outlook Tonight 28 × cloud 0.50)
- Solar Elevation
- 28.7° · Daytime
- Moon Phase
- Waxing Crescent
- Moon Illumination
- 6%
- Moon Altitude
- 0.7° · Up
- Latitude
- 51.05011
- Longitude
- -114.08529
- Geomagnetic Latitude
- 57.6°
- Horizon Threshold
- Kp 3
- Overhead Threshold
- Kp 5
Prediction Model Inputs
- Bz Persistence (60min)
- 5.3 nT
- Newell Coupling
- 9376
- Latitude Gate
- 0.00 now · 1.00 tonight (horizon Kp 3.4)
- Dynamic Pressure
- 3.6 nPa
- Storm Watch (CME)
- ~0h · G1 (Minor)
- Watch Predicted Kp
- 5
Timing & Signal Strength
- Timing
- Tonight
- Signal Strength
- Low
- L1 Delay
- ~41 min
- Magnetic Midnight
- 1:55 AM (peak hours 11:55 PM – 3:55 AM)
- Best Viewing Window
- 7:25 PM – 7:25 AM MDT (12h 0m)
3-Day Kp Forecast
| MDT | Oct 13 | Oct 14 | Oct 15 |
|---|---|---|---|
| 6:00 PM–9:00 PM | 4 | 3.67 | 2.67 |
| 9:00 PM–12:00 AM | 4.67 | 4 | 3.33 |
| 12:00 AM–3:00 AM | 5 | 2.67 | 3 |
| 3:00 AM–6:00 AM | 4.33 | 3.67 | 2.33 |
| 6:00 AM–9:00 AM | 4 | 3.67 | 1.67 |
| 9:00 AM–12:00 PM | 3.67 | 3.67 | 1 |
| 12:00 PM–3:00 PM | 3.33 | 3.33 | 1.33 |
| 3:00 PM–6:00 PM | 2.67 | 2.67 | 2.33 |
| Max | 5 | 4 | 3.33 |
| Ap Index | 28 | 20 | 10 |
Storm Probability
| Level | Oct 13 | Oct 14 | Oct 15 |
|---|---|---|---|
| Active | 35% | 35% | 20% |
| Minor storm | 35% | 25% | 5% |
| Moderate storm | 15% | 10% | 1% |
| Strong-Extreme storm | 5% | 1% | 1% |
Planetary K-index
Interplanetary Magnetic Field Bz-0.1 nT now
Southward (negative) Bz favors aurora. Observed data only, no forecast product exists for Bz.
Total IMF Field Bt9.3 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 Trend25 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-8 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.
- Red Deer 137 km
- Lethbridge 175 km
- Medicine Hat 266 km
- Edmonton 281 km
- Whitefish 294 km
- Kalispell 318 km
- Sandpoint 356 km
- Kelowna 404 km
Related Northern Lights Pages
Browse all prediction cities →
