Week 24 / 2026 | June 8 – 14 | SFI 141 | SSN 124 | A 36 | K 2 | X-Ray C1.2
Summary
Warning: G3 storm ahead! NOAA forecasts a strong geomagnetic storm reaching Kp 7 (G3 class) for Sunday/Monday (June 8–9). This will temporarily disrupt HF conditions severely — especially on the upper bands. Just last Thursday (June 5), a G2 storm (Kp 6.3) hit Earth, and we’re still recovering.
Solar Flux holds steady at 141 — just below last week’s 142. The Sunspot Number stands at 124, and an M1.8 flare was recorded today (June 6). Flare probabilities remain elevated: C/M-class 50%, X-class 10%. Solar wind is also elevated at 593 km/s.
The week splits in two: Sunday/Monday storm, Tuesday onwards recovery. Those who exploit the second half will be rewarded with SFI 140+ and quiet geomagnetic conditions. The Sporadic E season on 6 m continues unaffected — geomagnetic storms barely influence Es propagation.
Band Forecast
Band conditions are heavily storm-dependent. During the G3 storm (Sun/Mon), upper bands will be severely attenuated, and even 20 m may be affected at times. From Tuesday, conditions should normalise rapidly — SFI 140+ delivers excellent conditions once the field quiets.
| Band | Day (from Tue) | Night | Notes |
|---|---|---|---|
| 160m | Poor | Poor | Season over — nights too short, high QRN |
| 80m | Fair | Fair | Intra-EU evenings possible, Sun/Mon disturbed |
| 40m | Good | Good | Reliable from Tue — NA/JA from 20 UTC |
| 30m | Good | Good | Stable after recovery, FT8/CW consistent |
| 20m | Very good | Good | Main band from Tue — worldwide openings |
| 17m | Very good | Fair | SFI 140+ delivers daytime DX to JA, VK, W |
| 15m | Good to very good | Poor | F2 stable from Tue, Sun/Mon heavily attenuated |
| 12m | Good | Poor | F2 + Es — but only after storm subsides |
| 10m | Good (F2 + Es) | Poor | Sun/Mon dead, from Tue double openings possible |
| 6m | Good (Es) | Poor | Es storm-independent! Daily openings likely |
Geomagnetic Forecast
Warning: NOAA forecasts a G3 storm from Sunday midday. The disturbance will last until Monday night. Rapid recovery expected from Tuesday.
| Day | Kp expected | SFI Forecast | Assessment |
|---|---|---|---|
| Sun, Jun 8 | 2→5→7 | 140 | G1 from midday → G2 → G3 evening — HF severely disturbed |
| Mon, Jun 9 | 7→5 | 138 | G3 aftermath — slow recovery |
| Tue, Jun 10 | 3–4 | 138 | Settling — bands reopening |
| Wed, Jun 11 | 2–3 | 140 | Usable — upper bands returning |
| Thu, Jun 12 | 2 | 140 | Quiet — good DX conditions |
| Fri, Jun 13 | 1–2 | 140 | Quiet — best DX window of the week |
| Sat, Jun 14 | 1–2 | 138 | Excellent — perfect weekend for HF and VHF |
Recommendations for the Coming Week
- Sunday/Monday: Ride out the storm! At Kp 7 (G3), upper bands (10–17 m) are essentially unusable. Even 20 m and 40 m may drop out intermittently. Use the time for antenna work or CW practice.
- 6 metres is storm-resistant: Sporadic E openings are ionospheric and barely affected by geomagnetic storms. If you’re active on 50 MHz, you can still make QSOs on Sunday/Monday — even better with a Yagi.
- Aurora scatter on VHF possible! A G3 storm can produce aurora propagation on 2 m and 70 cm. Monitor CW and SSB on 144.100 MHz and 432.100 MHz — signals sound “raspy” and broad. Point your antenna north!
- From Tuesday: Seize the recovery! The second half of the week promises excellent conditions. SFI 140+ with quiet Kp = perfect combination for DX on all bands from 40 to 10 m.
- Thu–Sat = prime DX window: Kp 1–2 at SFI 140+ — best conditions of the week. Prefer 17 m and 15 m during daytime, 20 m evenings for NA DX.
- HAM RADIO Friedrichshafen: The 49th HAM RADIO takes place June 26–28 — Europe’s largest amateur radio exhibition. Mark your calendars!
Week 23 Review and Outlook
The flux rally since the low at SFI 101 (week 21) stabilises at a high level: 101 → 124 → 142 → 141 over four weeks. The NOAA long-term trend for June averages SFI 138 — we continue to track above the predicted monthly mean.
Week 23 was shaped by the subsiding CH-HSS disturbance from May 30 and excellent conditions from Tuesday. Then on Thursday, June 5, a G2 storm (Kp 6.3) struck — recovery was still underway when NOAA announced the next, stronger storm for Sunday.
Today’s M1.8 flare shows the Sun remains active. The elevated major flare probability (10%) means a larger flare is possible at any time — with corresponding propagation effects. Cycle 25 remains surprisingly strong even in its descending phase.
For VHF enthusiasts, the second week of June is ideal: Sporadic E season is in full swing, and the G3 storm offers the rare chance of aurora scatter on 2 m and 70 cm. Anyone with a transverter or VHF station should monitor 144 MHz on Sunday/Monday evening.
Live Data
| Band | Tag ☀ | Nacht ☾ |
|---|---|---|
| 160m | Schlecht | Mäßig |
| 80–40m | Mäßig | Gut |
| 30–20m | Gut | Gut |
| 17–15m | Gut | Gut |
| 12–10m | Mäßig | Schlecht |
Further Reading
- MUF Maps (prop.kc2g.com)
- NOAA Space Weather Prediction Center
- HamQSL Solar Dashboard
- DXHeat DX Cluster
- SolarHam
Transparency Notice
This weather report was created with the assistance of AI (Claude, Anthropic) based on current data from NOAA/SWPC, HamQSL and SolarHam. All content has been reviewed by the oeradio.at editorial team. Corrections or additions to [email protected].
