NOAA Logo

NWS Logo

Organizations

Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Wednesday, June 04, 2025 15:20:57

Main menu

NOAA Scales mini

minimize icon
Space Weather Conditions
on NOAA Scales
24-Hour Observed Maximums
R
no data
S
no data
G
no data
Latest Observed
R
no data
S
no data
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
maximize icon
R
no data
S
no data
G
no data
Current Space Weather Conditions
on NOAA Scales
R1 (Minor) Radio Blackout Impacts
close
HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.
More about the NOAA Space Weather Scales

CME Passage Continues; G3-G4 Still Possible Tonight, June 1st

CME Passage Continues but Showing Some Signs of Weakening
CME Passage Continues; G3-G4 Still Possible Tonight, June 1st
published: Monday, June 02, 2025 22:39 UTC

The G4 (Severe) geomagnetic storm watch remains in effect for tonight, June 1st (EDT), as CME passage continues. There are indications that the coronal mass ejection (CME) passage is weakening, but the solar wind conditions remain elevated, therefore additional periods of G3-G4 (Strong-Severe) levels remain possible. However, we now anticipate that conditions should weaken enough by tomorrow evening, June 2nd (EDT), that G1 (Minor) storm levels is the most likely peak response.