Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
567 FXXX12 KWNP 280031 DAYDIS :Product: Forecast Discussion :Issued: 2026 Mar 28 0030 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # http://www.swpc.noaa.gov/wwire.html # # Forecast Discussion # Solar Activity .24 hr Summary... Solar activity was at low levels. Region 4401 (N25W02, Ekc/beta-gamma) exhibited signs of evolution as it gained maturing penumbra in its intermediate area while maintaining a mixed polarity configuration. Newly numbered Region 4405 (S25E66, Eho/beta) was the main culprit for C-class flare activity during the period producing a C5.4 flare at 27/1002 UTC, which was the largest of the period. A CME originating from the vicinity of AR 4405 was observed in LASCO C2 imagery near the beginning of the 27 Mar UTC-day. This event was modeled and determined to be a miss well behind Earths orbit. Additional activity included a potentially disappearing filament centered near S28E23, but it is unclear as of the time of this writing if it resulted in an eruption. No Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... Solar activity is expected to be low with a chance for M-class (R1-R2/Minor-Moderate) flares through 30 Mar. Energetic Particle .24 hr Summary... Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 12,784 pfu. The greater than 10 MeV proton flux remained at background levels. .Forecast... The greater than 2 MeV electron flux is expected to continue to reach high levels through 30 Mar. The greater than 10 MeV proton flux is expected to continue at background levels. Solar Wind .24 hr Summary... Solar wind parameters reflected a return to an ambient-like environment. Solar wind speed reached a peak near 477 km/s before decreasing to near 400 km/s. Total IMF reached 5 nT at 27/0200Z. The maximum southward component of Bz reached -4 nT at 27/2058Z. Phi was predominantly negative. .Forecast... Near background conditions are expected to persist through 28 Mar. Enhancements from recurrent, positive polarity CH HSS influences are anticipated to begin by late 29 Mar and persist through 30 Mar. Geospace .24 hr Summary... The geomagnetic field was at quiet levels. .Forecast... Primarily quiet levels are expected to persist through 28 Mar. Quiet conditions are then expected to give way to unsettled to active levels by late on 29 Mar and continue into 30 Mar due to positive polarity CH HSS effects.