The National Weather Service’s Space Weather Prediction Center (SWPC) has issued a G1 (Minor) Geomagnetic Storm Watch for today and a G2 (Moderate) Geomagnetic Storm Watch for tomorrow.

Computer forecast models used by space weather experts suggest that a coronal mass ejection (CME) produced by region 2,680 on the Sun early on August 28 associated with an M4 flare may arrive later on September 1 creating minor geomagnetic storm conditions. According to the SWPC, activity could intensify into September 2 with the possible arrival of a second CME associated with a filament eruption that occurred later on August 28.

Should these CMEs materialize, combined effects from the two transients have the potential to result in G1-G2 storm conditions. The SWPC warns that forecast confidence is low due to the nature of these faint and somewhat ambiguous CMEs.