Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
522 FXXX12 KWNP 191231 DAYDIS :Product: Forecast Discussion :Issued: 2025 Nov 19 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 majority of the low level C-class activity was from Region 4284 (S07W39, Dai/beta). The largest flare was a C9.9/Sf at 19/0953 UTC from a region beyond the NE limb. New Regions 4285 (S16W49, Bxo/beta) and 4286 (S15E56, Axx/alpha) were numbered. 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 19-21 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 at background levels. .Forecast... The greater than 2 MeV electron flux is likely to be at moderate levels, with a chance for high levels over 19-21 Nov. The greater than 10 MeV proton flux is expected to remain at background levels through 21 Nov. Solar Wind .24 hr Summary... Negative polarity CH HSS influence was in decline over the period with a decrease in solar wind speed from approximately 550 km/s to near 400 km/s. Total field was steady at 5-8 nT while the Bz component was mostly north between +/-4 nT. Phi angle was in a negative sector. .Forecast... Nominal solar wind conditions are expected on 19-20 Nov. By mid to late on 21 Nov, a negative polarity CH HSS is expected to become geoeffective causing a minor enhancement in solar wind parameters. Geospace .24 hr Summary... The geomagnetic field was at quiet levels. .Forecast... The geomagnetic field is expected to be mostly quiet on 19-20 Nov under nominal solar wind conditions. Unsettled to active levels are expected later on 21 Nov with CH HSS onset.