07/05/2026
HF Band Conditions Forecast - Weekend (May 9-10, 2026)
Current Solar Activity Status
• Solar Flux Index (SFI): 120 (Good conditions)
• Sunspot Number (SSN): 105 (Active solar cycle)
• Kp Index: 0.0-2.67 (Quiet to unsettled)
• Overall Conditions: GOOD
Geomagnetic Forecast (NOAA SWPC)
May 7 (Today)
• Radio Blackout Risk: 15% (R1-R2 Minor)
• Solar Radiation Storm: 1% (S1 or greater)
• Current Status: R1 (Minor) Radio Blackout impacts observed
◦ HF Radio: Weak or minor degradation on sunlit side
◦ Occasional loss of radio contact possible
◦ Navigation: Low-frequency signals degraded for brief intervals
May 8 (Friday)
• Radio Blackout Risk: 30% (R1-R2 Minor)
• Solar Radiation Storm: 10% (R3-R5 possible)
• Expected Conditions: Slightly elevated activity
May 9-10 (Weekend)
• Radio Blackout Risk: 30% (R1-R2 Minor)
• Solar Radiation Storm: 10% (R3-R5 possible)
• Expected Conditions: Continued minor activity
HF Band Propagation Forecast (Weekend)
Best Performing Bands
80m (3.5-4.0 MHz)
• Daytime: Good
• Nighttime: Good
• Best times: 13:00-16:00 UTC
40m (7.0-7.3 MHz)
• Daytime: Good
• Nighttime: Good
• Best times: 08:00-14:00 UTC
30m (10.1-10.15 MHz)
• Daytime: Good
• Nighttime: Good
• Best times: 09:00-11:00 UTC
20m (14.0-14.35 MHz)
• Daytime: Good
• Nighttime: Good
• Best times: 11:00-13:00 UTC
Marginal Bands
17m (18.068-18.168 MHz)
• Conditions: Fair to Poor
• Expected success rate: 15-20%
15m (21.0-21.45 MHz)
• Conditions: Poor
• Expected success rate: 11-17%
12m (24.89-24.99 MHz)
• Conditions: Poor
• Expected success rate: 18-20%
10m (28.0-29.7 MHz)
• Conditions: Poor
• Expected success rate: 10-19%
Recommendations for Weekend Operations
1 Focus on Lower Bands: 80m, 40m, 30m, and 20m should provide the most reliable propagation throughout the weekend.
2 Timing Strategy:
◦ Morning hours (08:00-14:00 UTC) are optimal for most bands
◦ Evening propagation remains good on 80m and 40m
3 Solar Activity Monitoring: Keep an eye on geomagnetic indices as minor radio blackout events (R1-R2) are possible, which could cause weak degradation on the sunlit side of the earth.
4 Gray-Line Operations: The gray-line (terminator) will provide excellent propagation opportunities during dawn and dusk transitions.
5 DX Potential: With SFI at 120 and good overall conditions, weekend DX opportunities should be favorable, particularly on 20m during peak hours.
Additional Resources
• Real-time Propagation: https://www.dxpredictor.com/forecast
• NOAA Space Weather: https://www.swpc.noaa.gov/products/3-day-forecast
• HF Band Status: https://solar.w5mmw.net/
• Live Activity Map: https://hf.dxview.org/
Forecast Disclaimer: This forecast is based on current solar and geomagnetic data as of May 7, 2026, 11:10 UTC. Actual conditions may vary. Always check real-time propagation tools before operating.
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