


Routine Space Environment Product Issued Weekly
Issued by NWS
Issued by NWS
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785 FXXX02 KWNP 170156 WEKFOR :Product: 27-day Space Weather Forecast :Issued: 2025 Mar 17 0140 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # 27-day Space Weather Forecast # Forecast of Solar and Geomagnetic Activity 17 March - 12 April 2025 Solar activity is expected to be at a chance for R1-R2 (Minor-Moderate) levels through the outlook period. No proton events are expected at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at high levels on 17, 29-31 March and 06-12 April due to recurrent CH HSS influences. Normal to moderate levels are expected for the rest of the outlook period. Geomagnetic field activity is expected to be at unsettled to active levels on 17-21 March due to a combination of negative polarity CH HSS effects and weak CME effects. Active to minor storm (G1-Minor) levels are expected on 25-28 March due to recurrent positive polarity CH HSS effects. Active to minor to major storm (G1-G2/Minor-Moderate) levels are expected on 04-12 April due to recurrent negative polarity CH HSS effects. Quiet to unsettled levels are expected for the remainder of the period (subject to change with any CME activity).