Overview
- NOAA’s latest watch points to G3 conditions with Kp up to about 7.3, with the strongest window expected roughly 03:00–09:00 UTC (late evening in North America).
- Aurora may be visible across northern U.S. states and into the lower Midwest, with some forecasts extending potential visibility to as many as 22 states including parts of Oregon.
- The Met Office warns of visible aurora across northern UK with a chance of limited views farther south under ideal conditions, with activity likely into Wednesday before easing.
- R3 radio blackouts were logged after recent X‑class flares, and agencies caution that HF communications used by aviation and maritime services could experience disruptions.
- Forecasters stress uncertainty due to CME timing and interaction, with Spaceweather.com noting a possible “cannibal CME,” and viewers are advised to look between 10 p.m. and 2 a.m. local time while factoring in cloud cover and moonlight.