Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
674 FXXX12 KWNP 181231 DAYDIS :Product: Forecast Discussion :Issued: 2025 Nov 18 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 low. The largest flare was a C5.4/Sf at 17/1654 UTC from Region 4284 (S07W26, Dsi/beta). Region 4284 continued to be in a growth phase and developed penumbra on its leading and trailing spots. The rest of the spotted regions were either stable or in decay. No Earth-directed CMEs were observed. .Forecast... Solar activity is expected to be at low levels, with slight chance for moderate levels (R1-R2/Minor-Moderate), over 18-20 Nov. 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 was near background levels. .Forecast... The greater than 2 MeV electron flux is likely to be at moderate levels, with a chance for high levels over 18-20 Nov. The greater than 10 MeV proton flux is expected to remain at or near background levels through 20 Nov. Solar Wind .24 hr Summary... Solar wind parameters were enhanced from a negative polarity CH HSS. Solar wind speed gradually decreased from approximately 550 km/s to near 490 km/s. Total field ranged from 1-7 nT while the Bz component was between +6/-5 nT. Phi was mostly negative with deviations into a positive sector early in the period. .Forecast... Solar wind parameters are expected to continue to be elevated on 18-19 Nov under HSS conditions. A return to nominal conditions is expected by 20 Nov. Geospace .24 hr Summary... The geomagnetic field was at quiet to unsettled levels. .Forecast... Unsettled to active levels are expected on 18 Nov as HSS activity persists. A return to quiet to unsettled levels is expected on 19-20 Nov.