Northern Lights Alert: Aurora Forecast for August 19 — and Where to See It
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Forecasters just issued a geomagnetic storm watch for August 19 — the strongest aurora window of the month, with the lights possibly dipping into the continental US.
G1 storm (Kp 5) expected — best nights: Aug 3 and Aug 19.
Yes — expect G1 (Kp 5) conditions around Aug 19, with aurora potentially visible across northern Canada and the US northern tier: the Pacific Northwest, northern Plains, Great Lakes and upper Northeast.
Aurora chasers have two dates circled in August 2026 — and the second one lands this week. After an active burst on Aug 3, forecasters now expect the month's strongest geomagnetic activity on Aug 19, the product of a coronal mass ejection (CME) tied to an M1.9 solar flare detected on July 30.
What the August 19 Forecast Actually Says
The Space Weather Prediction Center's watch calls for G1 storm level (Kp index 5) at peak around Aug 19. At Kp 5, the aurora oval dips south: across Canada — including southern Ontario, Quebec and the Prairies — and into the northern US tier: Minnesota, Wisconsin, Michigan, North Dakota, Montana, Idaho, Washington state, with potential dips deeper into New York, Vermont, Maine and Iowa if the storm intensifies. The activity was already elevated early Aug 17 in high latitudes, setting the stage for the midweek peak.
The Twist: Solar Cycle 25 Is Fading — and Still Delivering
Most people assume the aurora window closes as the sun's activity cycle declines. But Solar Cycle 25 — one of the most active in recent decades — keeps producing mid-level flares and CMEs, and the new moon on Aug 13 left the night sky darker than it's been in weeks. That combination means the Aug 19 peak arrives in ideal conditions: dark skies, no moonlight and the best KP forecast of the month.
How to Actually See Them (No, You Don't Need a Telescope)
For the northern US tier and Canada, the window is the night of Aug 19 into Aug 20, best between 10 PM and 2 AM local time, away from city lights and looking north. A smartphone in night mode often catches aurora colors the naked eye misses — a common trick that turns a faint glow into a full photo. If clouds ruin Aug 19, the trailing activity typically lingers one or two nights, so keep the app alerts on.
