Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
349 FXXX12 KWNP 260031 DAYDIS :Product: Forecast Discussion :Issued: 2026 Jul 26 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 low, with background flux hovering near C-level. Region 4493 (N05W52, Ehi/beta-gamma) underwent decay in its trailing spots, but continued to produce infrequent C-class flare activity. This included a C2.0 flare at 25/0352 UTC, the largest of the period. The remaining regions were mostly unchanged and predominantly inactive. No new Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... Solar activity is expected to remain low, with a decreasing chance for M-class (R1-R2; Minor-Moderate) flares through 28 Jul. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux had isolated crossings of the 1,000 pfu threshold (peak of 1,064 pfu at 25/2010 UTC), but never maintained enough consistent readings to warrant issuing an alert. The greater than 10 MeV proton flux was at background values. .Forecast... There is a chance that the 2 MeV electron flux could reach high levels on 26 Jul due to CH HSS effects, with a return to moderate levels likely by 27-28 Jul. The greater than 10 MeV proton flux is expected to remain at background throughout the period. Solar Wind .24 hr Summary... Solar wind conditions were indicative of slowly weakening CH HSS influences, with possible weak transient features mixed in. The total IMF strength averaged near 4 nT. The Bz component was predominantly northward through ~25/0615 UTC, when it began weakly oscillating between +/- 4 nT. Solar wind speed continued to gradually decrease from about 535 km/s to 495 km/s. The phi angle was mainly in a negative sector. .Forecast... CH HSS influences are expected to continue weakening, with a return to mainly an ambient background state on 26 Jul. Enhancements in the solar wind parameters are likely on 27 Jul with the weak, flanking influences of a CME from 24 Jul. Continued elevated enhancements are likely early on 28 Jul as CME effects fade. Geospace .24 hr Summary... The geomagnetic field was quiet under diminishing CH HSS influences. .Forecast... Mostly quiet conditions are expected, with isolated unsettled periods possible, on 26 Jul as CH HSS influence lingers. Weak CME influences on 27 Jul are expected to bring active conditions and a chance for G1 (Minor) storm levels, with conditions likely lasting into 28 Jul.