To my SWW followers: I’ve started a new account/website focused on explaining the latest Long COVID research in plain language, if you're interested, as this is where I’m needed right now. I’ll be posting space wx content less frequently here. Thanks for all of the continued support.
long-covid.org
Thank you for your aurora reports! We had nearly 2,000 photos of aurora sent in from 12 countries across the world and 49/50 U.S. states as the Northern Lights made another widespread appearance on November 11 2025.
View our interactive map, courtesy Hunter Hurley, here:
hhwx.me/projects/aur...
Northern lights over the Great Lakes
Northern Lights over Wisconsin
Northern lights over Western Washington
Northern Lights over Minneapolis
Nearly a full flight of northern lights IAD->SEA. Just a small selection of photos, best I could do out of a plane at 35k ft with an iPhone @capitalweather.bsky.social @spacewxwatch.bsky.social
We’re excited to announce that the great @hunterhurleywx.bsky.social has set up a Discord server for us! Come join the conversation and talk all things space weather with the community over on Discord:
discord.gg/U6PV78MrUa
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Monday PM/Tue AM US forecast: Red line shows Kp=7 oval. Clouds high in NE/Midwest; better in West/North. Storm hits ~18:00Z Mon (ET daytime). "Show me" event—may underperform models. Visibility limited by clouds. Check our site for updates!
Where to see auroras: G3-G4 storm could light up Alaska, N. Canada, Iceland, Scandinavia, N. US states (WA, ID, MT, Dakotas, MN, WI, MI, ME). Southern Hemisphere: NZ, Tasmania, S. Australia. Look N horizon under clear skies. Track Kp on NOAA site. Possible live YouTube coverage!
Side view from NASA's STEREO-A shows good Earth alignment in the ecliptic plane. High confidence of impact, but storm intensity uncertain. Models predict Kp 7-9 (strong-extreme), but NOAA & I think it'll be milder: Kp=6 Sep 1, Kp=7 Sep 2. Manage expectations!
Incoming CME alert! A fast-moving solar storm (~1300 km/s) blasted from the Sun yesterday—Earth-directed halo type. Low mass, so moderate-strong impact expected. Arrival: Afternoon Sep 1 (Labor Day). Monitoring closely! #Aurora #SpaceWeather
Strong M8-class flare occurring now, initating a very large-scale eruption on the Earth-facing solar disk which is at least likely partially Earth-directed. A full halo CME is expected.
TONIGHT'S AURORA/CLOUD FORECAST:
X1.1-class flare solar flare occurring now
Incredible eruption associated with today's X1.2-class flare off the western limb. Imagery of the solar storm is still coming in, but expecting it to look like a partial halo. The storm itself will probably miss Earth, but energetic particles are currently streaming towards Earth
In case you missed our space weather chat from last night, get your popcorn because we went long! 🤩
www.youtube.com/watch?v=_rj_...
AURORA/CLOUD FORECAST TONIGHT:
A significant CME has arrived and geomagnetic effects are likely this evening. We may choose to move our auroral line farther south this PM, so stay tuned to our page for details. The red line represents southern extent of aurora visibility on the northern horizon.
A strong interplanetary shock (solar storm) arrival near Earth is now ongoing, per ACE/DSCOVR satellites. Moderate to strong geomagnetic storms possible this evening
A Moderate (G2, Kp=6) Geomagnetic Storm Watch has been issued by NOAA/SWPC for 16 April due to anticipated CME impacts.
Cloud wise, low clouds will likely be present over the Great Lakes region and Northeast with high clouds generally present over the Pacific Northwest. Your best shot looks to be the upper Midwest.
Follow us for the latest forecast updates and space weather alerts!
Arrival of one or more of these events seems likely during the second half of the day on Tuesday the 15th, but storm intensity is very uncertain. Here's where aurora visibility could make it down to Tuesday evening if we see an arrival of one or more CMEs that lead to moderate geomagnetic storms.
TUESDAY NIGHT (4/15) AURORA FORECAST: A pair of filament eruptions occurred today on the Earth-facing disk, both of which may potentially be Earth-directed. The first appears to be more Earth-directed in EUV imagery, but the second appears to have a wider extent, indicating likely Earth-directedness
A gigantic eruption occurred today, and it was one of the significant eruptions in recent memory. I think it's safe to say that we dodged an extreme geomagnetic storm here.
If all of the power in today's eruption could be harnessed, it would probably power all of humanity for over 100 billion years
With magnetic field already enhanced above 10 nT, it could potentially be a great night for aurora, especially when wind speeds start to pick up a bit.
As the fast CH HSS overtakes the slower ambient solar wind, plasma and magnetic fields are compressed at the leading edge. The compression leads to a pileup of solar wind plasma, causing an increase in density--a good sign the high speed stream will be following shortly after this region.
A coronal hole high speed stream (abbreviated CH HSS) typically has a velocity of 500–800 km/s, whereas the slow solar wind ahead of it moves at 300–400 km/s. This speed difference causes compression when the fast wind catches up to the slow wind.
TONIGHT: We're seeing the pileup out ahead of our anticipated coronal hole high speed stream.
(This will hit hard if you were a 90s baby or a parent of one)
Moderate geomagnetic storms expected later in the Zulu day as Earth connects to this high speed stream, potentially lasting 2 days or more. Yep yep yep.
If you could take any one person, celebrities included, on a 7-day, all-inclusive Northern Lights adventure and tour, complete with a cabin that has a crystal clear view of the sky from your bedroom... who would it be?
