Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
401 FXXX12 KWNP 301231 DAYDIS :Product: Forecast Discussion :Issued: 2026 Jul 30 1230 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. The largest flare was a C3.8/Sf at 30/0606 UTC from Region 4498 (N14E44, Dai/beta-gamma). Only minor changes in area was observed in Region 4498. Slight growth was observed in Regions 4499 (N04E12, Dro/beta-gamma) and 4501 (S08E10, Cro/beta-gamma). The rest of the spot groups were either stable or in decay. Other activity included and approximate 20 degree filament eruption, centered near N40W02, that began at 29/2000 UTC. A narrow, northerly directed CME was observed in SOHO/LASCO C2 imagery beginning at 30/0312 UTC. Modelling of the CME indicated no Earth-directed component. .Forecast... Solar activity is expected to be low with a chance for M-class flares (R1-R2, Minor-Moderate) through 01 August. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux was at normal to moderate levels. The greater than 10 MeV proton flux remained at background levels. .Forecast... The greater than 2 MeV electron flux is likely to remain at normal to moderate levels and the greater than 10 MeV proton flux is expected to remain at background levels through 01 August. Solar Wind .24 hr Summary... Solar wind parameters were at nominal levels with solar wind speed averaging around 334 km/s. Total field ranged from 1-5 nT while the Bz component was between +/-4 nT. Phi angle was variable. .Forecast... A disturbed solar wind environment will likely return late on 30 July due to the prospect of combined positive polarity CH HSS effects and CME arrivals from events that left the Sun on 26 and 27 July. An additional disturbance is likely on 01 August with the arrival of an additional CME that left the Sun late on 27 July. Geospace .24 hr Summary... The geomagnetic field was quiet. .Forecast... Quiet to unsettled conditions, with isolated active periods, are expected beginning late on 30 Jul and persisting through 01 August due to weak positive polarity CH HSS influences and a combination of either glancing or relatively weak CME effects from events that left the Sun over the course of 26 and 27 July. Chances for G1 or greater activity during the forecast period sit at 25-30%, but could become higher depending on both CME trajectory and strength of connectivity to the aforementioned positive polarity CH HSS.