Solar flux 204 and estimated planetary A-index 29. The estimated planetary K-index at 1200 UTC on 18 May was 3.33. Space weather for the past 24 hours has been moderate. Geomagnetic storms reaching the G2 level occurred. Radio blackouts reaching the R2 level occurred.

Forecast Issued at 2200Z on 17 May 2024

Solar Activity Forecast: Solar activity is expected to be low with a chance for M-class flares and a slight chance for an X-class flare on days one, two, and three (18 May, 19 May, 20 May).

Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to minor storm levels on day one (18 May) and quiet to active levels on days two and three (19 May, 20 May). Protons greater than 10 Mev have a slight chance of crossing threshold on day one (18 May).