From the NOAA Space Weather Prediction Center

G3 (STRONG) GEOMAGNETIC STORMS NOW LIKELY ON 01 DEC WITH A FULL HALO CME published: Wednesday, November 29, 2023 18:58 UTC

With 3 CMEs already inbound, the addition of a 4th, full halo CME has prompted SWPC forecasters to upgrade the G2 Watch on 01 Dec to a G3 Watch. This faster-moving halo CME is progged to merge with 2 of the 3 upstream CMEs, all arriving at Earth on 01 Dec. G3 (Strong) conditions are now likely on 01 Dec. Continue to monitor spaceweather.gov for the latest updates.