Aurora Outlook and Prediction for Sheridan, Wyoming

Aurora Visibility8Poor

Kp: 3.67 | Bz: -0.77

Prediction13Little to None

Current Conditions: Little to no aurora activity in Sheridan. Geomagnetic conditions are quiet. Scattered clouds may partially block the view.

Predicted Outlook: Little to no aurora activity expected currently. Geomagnetic conditions are quiet.

Best Viewing Window: 3:57 AM – 5:57 AM MDT (2h 0m)

Bz -0.77 nT Aurora None Dark Night Scattered · 82% Prediction 13 · Little to None Waning Gibbous 94% Color Key

Space Weather Now

Kp (now)

3.67

Forecast Kp (today)

3.67

Bz (nT)

-0.77

HPI

6 Minimal

Dst (nT)

-21

Density (p/cc)

5.8

Speed (km/s)

472

Sky / Darkness

Scattered Dark Night

Sunspot Number

Timing: Now · Confidence: Moderate

Webcam

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

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3-Day Forecast for Sheridan, Wyoming

Tonight's forecast peaks at Kp 2.7, short of the roughly Kp 6 the aurora usually needs to be seen from Sheridan.

Aug 30

Quiet

Low chance of aurora - geomagnetic activity is expected to stay quiet.

Best time to look up: 9:00 PM–12:00 AM MDT

10% chance of elevated activity · Kp 2 during viewing window

Aug 31

Quiet

Low chance of aurora - geomagnetic activity is expected to stay quiet.

Best time to look up: 12:00 AM–3:00 AM MDT

10% chance of elevated activity · Kp 1.67 during viewing window

Sep 01

Forecast Pending

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.

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: 73

SOHO

Coronal Mass Ejections

Space Weather Prediction Center

Solar Wind & IMF (GSM)

Bt: 6.3 nT
Bx: 0.1 nT
By: 6.3 nT
Bz: -0.77 nT
Clock Angle θ: -7°
Cone Angle φ: 88.9°
Speed: 472 km/s
Density: 5.8 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: 0.1 nT
By: 5.8 nT
Bz: 2.5 nT
θ Angle: 23.6°
φ Angle: 88.8°
Satellite: SOLAR-1
Data Quality: Good
Reading Time: Aug 30, 3:52 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): 3.67
Dst: -21 nT
HPI: 6 GW
Sunspot Number: 73

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: Aug 30, 4:44 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: 8 · Poor
Aurora Visibility (w/ Moon): 8 · Poor
Prediction Score: 13 · Little to None

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

Sky & Location

Cloud Cover: 82% · Scattered
Solar Elevation: -24.1° · Dark Night
Moon Phase: Waning Gibbous
Moon Illumination: 94%
Moon Altitude: 45.7° · Up
Latitude: 44.79719
Longitude: -106.95618
Geomagnetic Latitude: 52.2°
Horizon Threshold: Kp 6
Overhead Threshold: Kp 8

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): -1.6 nT
Newell Coupling: 5795
Dynamic Pressure: 2.2 nPa
Storm Watch (CME): —
Watch Predicted Kp: —

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

Timing & Confidence

Timing: Now
Confidence: Moderate
L1 Delay: ~3178 min
Best Viewing Window: 3:57 AM – 5:57 AM MDT (2h 0m)

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	Aug 30	Aug 31	Sep 01
6:00 PM–9:00 PM	2.67	1.67	1.67
9:00 PM–12:00 AM	3.67	2	1.33
12:00 AM–3:00 AM	3.67	1.67	1.67
3:00 AM–6:00 AM	2.67	1.67	1.33
6:00 AM–9:00 AM	1.67	1	1.33
9:00 AM–12:00 PM	1	1	1.33
12:00 PM–3:00 PM	1.67	0.67	1.33
3:00 PM–6:00 PM	2.67	2	1.67
Max	3.67	2	1.67
Ap Index	12	5	5

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

Storm Probability

Level	Aug 30	Aug 31	Sep 01
Active	40%	10%	10%
Minor storm	25%	1%	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

Aug 27

Aug 28

Aug 29

Aug 30

Now

Aug 29

Aug 30

Aug 31

Sep 1

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

Interplanetary Magnetic Field Bz-1.1 nT now

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

Total IMF Field Bt6.4 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.

Storm Trend26 now

Prediction score (0-100) over the last 24 hours, logged every 5 minutes. 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-21 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: 467 km/s now Pressure: 2 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.

Related Northern Lights Pages

Aurora Outlook and Prediction for Sheridan, Wyoming

Space Weather Now

Webcam