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Space Weather Watch @spacewxwatch.bsky.social · 07/09/2026

spacewxwatch.substack.com/p/why-the-no...

Space Weather Watch @spacewxwatch.bsky.social · 21/08/2026

NEW: We just shipped a fully 3D, scrollable aurora visibility forecast: drag to rotate the globe, scroll to zoom, watch the aurora oval expand in real time as geomagnetic activity climbs. Looking for beta testers 👇 auroraforecasttonight.com

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Space Weather Watch @spacewxwatch.bsky.social · 26/07/2026

(We’ll also be upgrading your account to more features if you’re one of the first to sign up)

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Space Weather Watch @spacewxwatch.bsky.social · 26/07/2026

Our flagship product is online today after a few weeks of testing. If that solar storm you were waiting for doesn’t end up arriving, our model won’t exaggerate the visibility forecast. Be sure to sign up for exclusive free access at auroraforecasttonight.com

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Space Weather Watch @spacewxwatch.bsky.social · 17/01/2026

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

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Space Weather Watch @spacewxwatch.bsky.social · 28/11/2025

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...

hhwx.me

Aurora Sightings Map - November 11, 2025

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Reposted by Space Weather Watch

1Zach1 @1zach1.bsky.social · 12/11/2025

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

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Space Weather Watch @spacewxwatch.bsky.social · 11/11/2025

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

discord.gg

Join the Space Weather Watch Discord Server!

Check out the Space Weather Watch community on Discord - hang out with 33 other members and enjoy free voice and text chat.

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Space Weather Watch @spacewxwatch.bsky.social · 12/10/2025

Think you can forecast space weather better? Our brand is for sale! You'll receive access to our X, Facebook, Instagram, Etsy, YouTube, Bluesky, Threads, Patreon, and be in our control of our email and website, too. Official inquires only, please. admin@spacewxwatch.com

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Space Weather Watch @spacewxwatch.bsky.social · 31/08/2025

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!

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Space Weather Watch @spacewxwatch.bsky.social · 31/08/2025

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!

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Space Weather Watch @spacewxwatch.bsky.social · 31/08/2025

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!

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Space Weather Watch @spacewxwatch.bsky.social · 31/08/2025

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

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Space Weather Watch @spacewxwatch.bsky.social · 31/05/2025

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.

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Space Weather Watch @spacewxwatch.bsky.social · 25/05/2025

X1.1-class flare solar flare occurring now

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Space Weather Watch @spacewxwatch.bsky.social · 13/05/2025

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

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Space Weather Watch @spacewxwatch.bsky.social · 29/04/2025

In case you missed our space weather chat from last night, get your popcorn because we went long! 🤩 www.youtube.com/watch?v=_rj_...

youtube.com

Space Weather Unplugged - A chat with Chris Stubenrauch

YouTube video by Shelbydiamondstar - The Aurora Wrangler

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Space Weather Watch @spacewxwatch.bsky.social · 15/04/2025

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.

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Space Weather Watch @spacewxwatch.bsky.social · 15/04/2025

A strong interplanetary shock (solar storm) arrival near Earth is now ongoing, per ACE/DSCOVR satellites. Moderate to strong geomagnetic storms possible this evening

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Space Weather Watch @spacewxwatch.bsky.social · 13/04/2025

A Moderate (G2, Kp=6) Geomagnetic Storm Watch has been issued by NOAA/SWPC for 16 April due to anticipated CME impacts.

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Space Weather Watch @spacewxwatch.bsky.social · 13/04/2025

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!

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Space Weather Watch @spacewxwatch.bsky.social · 13/04/2025

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.

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Space Weather Watch @spacewxwatch.bsky.social · 13/04/2025

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

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Space Weather Watch @spacewxwatch.bsky.social · 28/03/2025

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

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Space Weather Watch @spacewxwatch.bsky.social · 25/03/2025

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.

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Space Weather Watch @spacewxwatch.bsky.social · 25/03/2025

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.

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Space Weather Watch @spacewxwatch.bsky.social · 25/03/2025

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.

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Space Weather Watch @spacewxwatch.bsky.social · 25/03/2025

TONIGHT: We're seeing the pileup out ahead of our anticipated coronal hole high speed stream.

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Space Weather Watch @spacewxwatch.bsky.social · 25/03/2025

(This will hit hard if you were a 90s baby or a parent of one)

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Space Weather Watch @spacewxwatch.bsky.social · 25/03/2025

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.

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Space Weather Watch @spacewxwatch.bsky.social · 23/03/2025

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?

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Space Weather Watch @spacewxwatch.bsky.social · 23/03/2025

The CME we were expecting late last night still hasn’t reached Earth yet—I’ll keep you posted if anything changes! In the meantime, thanks for sticking with real space weather experts and not the "armchair" meteorologists who were confidently predicting auroras deep into the U.S. last night! 😉

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Space Weather Watch @spacewxwatch.bsky.social · 23/03/2025

(5/5) Stay ahead of the action and get space weather summaries and handwritten Kp forecasts sent to you every M/W/F: www.patreon.com/spacewxwatch Follow us for more: spacewxwatch.com www.youtube.com/@spacewxwatch x.com/spacewxwatch www.threads.net/@spacewxwatch bsky.app/profile/spac...

patreon.com

Space weather tutorials and Northern Lights forecasts.

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Space Weather Watch @spacewxwatch.bsky.social · 23/03/2025

(4/5) Meanwhile, a very large coronal hole structure is about 2.5 to 3 days out from being geoeffective; Tuesday the 25th could bring about moderate geomagnetic storms.

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Space Weather Watch @spacewxwatch.bsky.social · 23/03/2025

(3/5) We're not decreasing our Kp "forecast" yet, however. Kp from 5-7 is expected with the arrival of any solar storm near Earth--it might be very late tonight or daytime hours for the U.S. tomorrow.

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Space Weather Watch @spacewxwatch.bsky.social · 23/03/2025

(2/5) Particles at ACE which can sometimes be used as a diagnostic for a CME arrival to come are on a decreasing trend, signaling not much is on the horizon in the next few hours, most likely.

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Space Weather Watch @spacewxwatch.bsky.social · 23/03/2025

(1/5) March 22 09:15pm ET: The solar wind is a bit enhanced still from yesterday's CME arrival, but magnetic field is rather low and stable and solar wind velocities are less than 500 km/s.

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Space Weather Watch @spacewxwatch.bsky.social · 22/03/2025

For the CME, Kp ranging likely from 5 (minor storm) to 7 (strong storm) with an outside chance at Kp=8 (severe storm) with arrival likely very late tonight for the U.S. Could be a few stormy nights ahead!

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Space Weather Watch @spacewxwatch.bsky.social · 22/03/2025

Did you see #aurora last night? Please let us know! Meanwhile, a fast Earth-directed CME followed shortly after by the effects of a large coronal hole will almost certainly bring more geomagnetic storms to Earth in the next 1-3 days. More deets below:

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Space Weather Watch @spacewxwatch.bsky.social · 21/03/2025

That is a very large coronal hole--a patch of open magnetic field lines on the Sun which stream out fast solar wind known as a "high speed stream". Effects from it could start at Earth as soon as late on March 24th and will probably persist for two days or more. #spacewx

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Space Weather Watch @spacewxwatch.bsky.social · 21/03/2025

CME ARRIVAL: Minor to moderate (Kp=5-6) geomagnetic storms likely this evening with strong storming possible (Kp=7) as a strong magnetic field enhancement is observed at solar wind spacecraft at ACE/DSCOVR following the passage of a solar coronal mass ejection

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Space Weather Watch @spacewxwatch.bsky.social · 20/03/2025

Coronal hole of the year now rotating into view...

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Space Weather Watch @spacewxwatch.bsky.social · 19/03/2025

We're still awaiting a CME arrival during the second half of tomorrow, but meanwhile, some disturbance is passing by the near-Earth environment... folks in Canada and the northern fringes of the U.S. could be in for aurora views tonight, potentially... let us know if you see anything?

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Space Weather Watch @spacewxwatch.bsky.social · 17/03/2025

Measuring the speed of the storm using software to track its leading edge, it’s possible that the CME arrives near Earth late in the Zulu day on Wednesday (sometime in the afternoon or evening Wednesday EDT). If so, it could bring enhancements in #aurora to those at high and maybe mid latitudes.

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Space Weather Watch @spacewxwatch.bsky.social · 17/03/2025

What does it mean? Well, when compared with Earth-facing telescope imagery of the Sun, it looks fairly likely that the solar storm has an Earth directed component.

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