Northern Lights May Illuminate US Border States This Weekend

Weekend Aurora Event Targets Northern Tier

The National Oceanic and Atmospheric Administration forecasts visible northern lights across several northern US states Friday and Saturday nights. Space weather experts predict geomagnetic storms will push the Kp index to 4.6 Friday night and 5.6 in the early hours of Saturday morning, extending aurora visibility slightly below the Canadian border. The storms arrive from multiple coronal mass ejections detected leaving the sun on June 11, which reached Earth early Saturday, June 13.

NOAA’s strongest forecast period runs from 0000-0600 UTC on Sunday, June 14. For US observers, that timeframe translates to Saturday evening through the very early hours of Sunday morning. The agency characterizes the predicted Kp index levels as conditions where the aurora may appear “quite pleasing” to see in the right locations. This represents a modest geomagnetic disturbance, not a major aurora outbreak, yet sufficient to bring displays to portions of the northern United States.

NOAA has issued predictions for geomagnetic storms from Friday through Sunday, including a G2 class storm in the early hours of Saturday morning. These storms stem from eruptions of plasma and magnetic fields from the sun’s outer atmosphere. A coronal mass ejection represents charged particle clouds often generated by solar flares. Unlike solar flares that travel at light speed, these ejections move at up to 1,900 miles per second and require several days to cross the solar system.

Geographic Visibility Zones For Friday and Saturday

NOAA’s forecast maps show aurora visibility chances for Friday night across Washington, Idaho, Montana, North Dakota, northern Wyoming, South Dakota, Minnesota, northern Wisconsin and Michigan. These states face relatively modest probabilities compared to much of Alaska, where forecasters predict high visibility chances across a large portion of the state’s interior. Saturday night may also provide viewing opportunities, as NOAA maintains a Kp index prediction of 4.6 for that evening.

The agency rates this event as a G1-rated geomagnetic storm, indicating minor disturbance levels. However, Kp 4 conditions can sometimes bring visible northern lights to the far northern tier of the US, especially near the Canadian border. If the predicted G2 class geomagnetic storm materializes Saturday morning, the viewline could extend significantly southward. That scenario would add Oregon, Nebraska, Iowa, Illinois, Indiana, Ohio, New York, Vermont and New Hampshire to the potential viewing zone, though this expansion depends entirely on storm intensity reaching G2 levels.

“G1 (Minor) levels are likely on 14 June, as the CMEs’ effects wane,” stated NOAA’s Space Weather Prediction Center in its forecast.

Understanding Coronal Mass Ejections

The current aurora opportunity stems from a coronal mass ejection that departed the sun on June 11. These solar phenomena consist of massive clouds of charged particles ejected from the sun’s corona. When Earth-directed, they produce geomagnetic storms and auroras upon arrival. Two additional coronal mass ejections also approach Earth, creating uncertainty in the forecasts. Space weather can change rapidly, with forecasts revised frequently as new data arrives from solar monitoring satellites.

The UK Met Office forecast notes that although conditions were expected to gradually ease during June 13, solar wind speeds could become enhanced again. This enhancement would occur if a glancing coronal mass ejection arrives during the forecast period. The phrase “glancing blow” refers to a coronal mass ejection that does not directly strike Earth but passes close enough to trigger minor geomagnetic disturbances. Such indirect impacts typically produce weaker effects than direct hits yet can still generate visible auroras at high latitudes.

Optimal Viewing Strategies

The best chance of observing the lights typically occurs between 10 p.m. and 2 a.m. local time, according to NOAA guidance. Hopeful viewers should travel as far north as possible to a high, north-facing vantage point away from light pollution. Clear skies remain essential, as cloud cover will completely obscure any aurora display. Aurora watchers should look northward, avoid bright artificial lights, and allow at least 15-20 minutes for eyes to adjust to darkness.

Cameras often detect faint aurora before the human eye perceives color clearly, making photography a valuable tool even when visual displays appear weak. Long-exposure settings reveal auroral structures invisible to unaided vision. iPhone users should activate night mode, while Android users should switch to Pro mode. All smartphone photographers should disable flash and shoot in RAW image format for maximum flexibility in post-processing. These settings capture the full dynamic range of auroral displays, which often appear more vivid in photographs than to the naked eye.

Photography Technical Specifications

Those using dedicated cameras should set the aperture or F-stop to four or less to maximize light gathering. Focus should be set to the furthest possible setting, typically marked as infinity on lens barrels. All photographers should use tripods for stabilizing images during the long exposures required for aurora photography. Exposure times typically range from 5 to 30 seconds depending on aurora intensity and camera sensitivity settings.

Higher ISO settings between 1600 and 3200 help capture fainter auroral features, though they introduce noise into images. Wide-angle lenses perform best, capturing more sky and providing compositional context with foreground elements. Manual focus ensures sharp stars and auroral structures, as autofocus systems struggle in low-light conditions. Photographers should take multiple exposures at varying settings, as auroral intensity fluctuates rapidly and optimal exposure parameters change throughout displays.

Seasonal Viewing Challenges

The timing presents challenges for aurora observation. In the lead-up to the June solstice, nights become very short across northern US states and much of Canada. Twilight persists for much of the night in these latitudes, limiting darkness and making auroras more difficult to see. The prolonged twilight reduces contrast between the aurora and background sky, requiring stronger displays for visibility than during darker winter months.

However, the moon phase works in observers’ favor this weekend. Dark skies without moonlight interference enhance aurora visibility, allowing fainter displays to stand out against the sky. This advantage partially compensates for the seasonal twilight challenges. Observers in the predicted viewing zones should monitor space weather forecasts closely, as conditions may evolve. Real-time aurora monitoring websites provide current data on geomagnetic activity, helping skywatchers decide when to head outside for optimal viewing opportunities.