####018002187#### FXXX10 KWNP 060031 DAYTDF :Product: 3-Day Forecast :Issued: 2026 Apr 06 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 # # 3-Day Forecast # A. NOAA Geomagnetic Activity Observation and Forecast The greatest observed 3 hr Kp over the past 24 hours was 4 (below NOAA Scale levels). The greatest expected 3 hr Kp for Apr 06-Apr 08 2026 is 3.00 (below NOAA Scale levels). NOAA Kp index breakdown Apr 06-Apr 08 2026 Apr 06 Apr 07 Apr 08 00-03UT 2.67 2.67 1.67 03-06UT 3.00 2.67 1.67 06-09UT 2.67 2.67 1.67 09-12UT 2.67 2.00 1.33 12-15UT 2.00 0.67 0.67 15-18UT 1.67 0.67 0.67 18-21UT 1.67 1.67 1.67 21-00UT 2.67 2.67 2.00 Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast. B. NOAA Solar Radiation Activity Observation and Forecast Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was below S-scale storm level thresholds. Solar Radiation Storm Forecast for Apr 06-Apr 08 2026 Apr 06 Apr 07 Apr 08 S1 or greater 15% 15% 15% Rationale: There is a slight chance for the greater than 10 MeV proton flux to exceed S1 (Minor) solar radiation storm levels over 06-08 Apr. C. NOAA Radio Blackout Activity and Forecast No radio blackouts were observed over the past 24 hours. Radio Blackout Forecast for Apr 06-Apr 08 2026 Apr 06 Apr 07 Apr 08 R1-R2 55% 55% 55% R3 or greater 15% 15% 15% Rationale: R1 (Minor) radio blackout levels are likely, with a slight chance for an isolated R3 (Strong) event over 06-08 Apr, driven primarily by the flare potential of Region 4409. ####018002542#### FXXX12 KWNP 060031 DAYDIS :Product: Forecast Discussion :Issued: 2026 Apr 06 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 4409 (N02W28, Eac/beta) produced a C3.8 flare at 05/0204 UTC, the strongest of the period, as well as multiple other low-level C-class flares. The region exhibited minor evolution over the past 24 hours. The remaining spotted regions on the visible disk were either stable or in gradual decay. No Earth-directed CMEs were observed in available coronagraph imagery. .Forecast... Solar activity is likely to reach moderate (R1-R2/Minor-Moderate) levels, with a slight chance for X-class (R3/Strong) flares, over 06-08 Apr, driven primarily by the flare potential of Region 4409. Energetic Particle .24 hr Summary... The greater than 2 MeV electron flux reached high levels with a peak flux of 6,000 pfu at 05/1645 UTC. The greater than 10 MeV proton flux continued a gradual decline towards background levels throughout the period. .Forecast... The greater than 2 MeV electron flux is expected to reach high levels on 06-08 Apr. There is a slight chance for the greater than 10 MeV proton flux to exceed S1 (Minor) solar radiation storm levels over 06-08 Apr. Solar Wind .24 hr Summary... Solar wind parameters suggested waning influence from a negative polarity CH HSS. Total magnetic field strength was steady between 4-6 nT and no significant periods of southward Bz were observed. Wind speeds gradually declined from ~575 km/s to ~525 km/s by the end of the UT day. Phi angle was predominantly oriented in the negative solar sector, with sporadic oscillations into a positive orientation throughout the period. .Forecast... The solar wind environment is expected to remain at least slightly enhanced through 06 Apr due to waning negative polarity CH HSS influence. Mostly nominal conditions are expected on 07-08 Apr. Geospace .24 hr Summary... The geomagnetic field reached active levels during the period under negative polarity CH HSS influences. .Forecast... The geomagnetic field is expected to reach unsettled levels on 06-07 Apr, as negative polarity CH HSS influences gradually wane. Mostly quiet levels are likely on 08 Apr. ####018000994#### AXXX82 KWNP 060031 DAYOBS :Product: Summary of Space Weather Observations dayobs.txt :Issued: 2026 Apr 06 0030 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # Summary of Space Weather Observations # :Solar_Region_Summary: 2026 Apr 05 # Region Location Sunspot Characteristics # Helio Spot Spot Mag. # Num Lat.,CMD Long. Area Extent class count class 4403 N15W79 207 10 1 AXX 1 A 4404 N13W60 188 50 2 HSX 1 A 4405 S28W46 174 150 14 EAO 10 B 4406 N07W55 183 40 2 HSX 1 A 4408 N08W28 156 60 2 HSX 1 A 4409 N02W28 156 170 11 EAC 26 B 4412 N10E08 120 10 2 BXO 2 B