Aurora Forecast and Prediction for Cheyenne, Wyoming

Aurora Visibility0Poor

Kp: 1.33 | Bz: 2.9

Prediction0Little to None

Current Conditions (as of 5:17 AM MDT): Little to no aurora activity in Cheyenne. Geomagnetic conditions are quiet. Overcast skies will likely block any aurora view.

Predicted Outlook (5:17 AM – 6:42 AM MDT): Little to no aurora activity expected currently. Geomagnetic conditions are quiet.

Best Viewing Window: 5:17 AM – 6:42 AM MDT (1h 25m) · peak hours typically 11:02 PM – 3:02 AM

Bz 2.9 nT Aurora None Dark Night Overcast · 100% Prediction 0 · Little to None Waxing Crescent 10% Color Key

Space Weather Now

Kp (now)

1.33

Forecast Kp (today)

3.67

Bz (nT)

2.9

HPI

9 Minimal · 18 GW

Dst (nT)

-12

Density (p/cc)

3.7

Speed (km/s)

549

Sky / Darkness

Overcast Dark Night

Sunspot Number

102

Timing: Now · Signal Strength: High

Webcam

No aurora cams nearby. Center on nearest camera (690 mi away).

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3-Day Forecast for Cheyenne, Wyoming

Tonight's forecast peaks at Kp 2.7, short of the roughly Kp 8 the aurora usually needs to be seen from Cheyenne.

Oct 13

Global: Active Cheyenne: Not expected

Kp 2.7 is short of the roughly Kp 8 the aurora needs to clear the northern horizon from Cheyenne.

Global: Moderate planetary activity expected - aurora across the high-latitude zone, and lower with a good substorm.

Best time to look up: 3:00 AM–6:00 AM MDT

35% chance of elevated activity · Kp 2.67 during viewing window

Oct 14

Global: Active Cheyenne: Not expected

Kp 3.3 is short of the roughly Kp 8 the aurora needs to clear the northern horizon from Cheyenne.

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: Quiet Cheyenne: Not expected

Kp 1.7 is short of the roughly Kp 8 the aurora needs to clear the northern horizon from Cheyenne.

Global: Quiet planetary conditions expected - aurora mostly confined to the far north.

Best time to look up: 6:00 PM–9:00 PM MDT

15% chance of elevated activity · Kp 1.67 during viewing window

Quiet across all 3 days - low likelihood of an aurora display.

Aurora Oval & Satellite & Sun

Aurora Probability

LowHigh

Interactive Aurora Globe

Full-size Aurora Globe

Satellite View

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National Weather Service

Sunspots

Current sunspot number: 102

SOHO

Coronal Mass Ejections

Space Weather Prediction Center

Aurora Photography by Todd Salat

Original prints from Todd Salat's collection.

Goddess of Dawn - aurora borealis photograph taken at Mile 135 Parks Highway, Alaska by Todd Salat

Heaven and Earth

Eagle, Alaska · 1999

See the full gallery Prints and pricing

Solar Wind & IMF (GSM)

Bt: 3.7 nT
Bx: -1.6 nT
By: -1.8 nT
Bz: 2.9 nT
Clock Angle θ: 50.9°
Cone Angle φ: 228.4°
Speed: 549 km/s
Density: 3.7 p/cc

Real-time solar wind and interplanetary magnetic field, in geocentric solar magnetospheric (GSM) coordinates - the values the prediction model actually runs on.

IMF Detail (GSE) & Source

Bx: -1.6 nT
By: -3 nT
Bz: 1.6 nT
θ Angle: 24.9°
φ Angle: 242.6°
Satellite: SOLAR-1
Data Quality: Good
Reading Time: Oct 14, 5:14 AM MDT

The same magnetic field reading in geocentric solar ecliptic (GSE) coordinates, plus which satellite it came from and how fresh it is.

Geomagnetic Indices

Kp (now): 1.33
Dst: -12 nT
HPI: 9 GW
Sunspot Number: 102

Headline storm-activity indices - Kp (planetary), Dst (ring current), HPI (hemispheric power), and today's sunspot count.

Aurora Model

Ovation Value: 0
Ovation Label: None
Model Data Time: Oct 14, 5:54 AM MDT
Ovation Data: Live

NOAA's OVATION Prime output - how far south the aurora oval is likely to extend right now.

Scores & Ratings

Aurora Visibility: 0 · Poor
Aurora Visibility (w/ Moon): 0 · Poor
Prediction Score: 0 · Little to None

This page's three scores side by side - raw activity, moon/cloud-adjusted visibility, and the forecast.

Sky & Location

Cloud Cover: 100% · Overcast
Clouds, Next Dark Window: 100% · Overcast · ×0.05
Aurora Visibility Tonight: 0 · Poor (Outlook Tonight 0 × cloud 0.05)
Solar Elevation: -21.9° · Dark Night
Moon Phase: Waxing Crescent
Moon Illumination: 10%
Moon Altitude: -64.8° · Below Horizon
Latitude: 41.13998
Longitude: -104.82025
Geomagnetic Latitude: 48.8°
Horizon Threshold: Kp 8
Overhead Threshold: Never

Local sky and moon conditions - what actually turns the raw aurora score into a real visibility score for this spot.

Prediction Model Inputs

Bz Persistence (60min): 1.8 nT
Newell Coupling: 341
Latitude Gate: 0.00 now · 0.00 tonight (horizon Kp 7.7)
Dynamic Pressure: 1.9 nPa
Storm Watch (CME): —
Watch Predicted Kp: —

The individual weighted inputs - Bz persistence, coupling, pressure, CME timing - that combine into the Prediction score.

Timing & Signal Strength

Timing: Now
Signal Strength: High
L1 Delay: ~46 min
Magnetic Midnight: 1:02 AM (peak hours 11:02 PM – 3:02 AM)
Best Viewing Window: 5:17 AM – 6:42 AM MDT (1h 25m)

How soon a solar wind change reaches Earth, how confident the model is right now, and today's best window to actually look up.

3-Day Kp Forecast

MDT	Oct 14	Oct 15	Oct 16
6:00 PM–9:00 PM	3.67	2.67	1.67
9:00 PM–12:00 AM	3.33	3.33	1.67
12:00 AM–3:00 AM	3.67	3	1.33
3:00 AM–6:00 AM	2.67	2.33	1.33
6:00 AM–9:00 AM	2.67	1.67	1.33
9:00 AM–12:00 PM	3.33	1	1.33
12:00 PM–3:00 PM	3.33	1.33	1.67
3:00 PM–6:00 PM	3.33	2.33	1.33
Max	3.67	3.33	1.67
Ap Index	18	10	5

Max Kp forecast under 4 for all 3 days - low likelihood of an aurora display.

Storm Probability

Level	Oct 14	Oct 15	Oct 16
Active	35%	20%	15%
Minor storm	25%	5%	1%
Moderate storm	10%	1%	1%
Strong-Extreme storm	1%	1%	1%

NOAA SWPC's official 3-day Kp forecast and geomagnetic storm probability - an independent second opinion alongside this page's own real-time model.

Planetary K-index

Oct 11

Oct 12

Oct 13

Oct 14

Now

Oct 13

Oct 14

Oct 15

Oct 16

Quiet (Kp 0-3) Unsettled (Kp 4) Minor-Moderate Storm (Kp 5-6) Strong+ Storm (Kp 7-9) Forecast (hatched)

Interplanetary Magnetic Field Bz2.9 nT now

Southward (negative) Bz favors aurora. Observed data only, no forecast product exists for Bz.

Total IMF Field Bt3.8 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 Trend13 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-12 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

Speed: 549 km/s now Pressure: 1.9 nPa now

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.

24-hour trend charts for the values above, so you can see whether conditions are building or fading.

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.

Fort Collins 41 mi
Boulder 81 mi
Denver 97 mi
Aurora 97 mi
Casper 142 mi
Colorado 153 mi
Colorado Springs 159 mi
Rapid City 219 mi

Related Northern Lights Pages

Aurora Forecast and Prediction for Cheyenne, Wyoming

Space Weather Now

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