HF Fadeout Warning

(last updated 16 May 2025 22:35 UT)
SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/47 ISSUED AT 2248UT/14 MAY 2025 BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE. AR4087 has recently produced flares at R2-R3 levels. Further flaring impacting lower HF frequencies is probable. DEGRADED HF PROPAGATION CONDITIONS EXPECTED FROM 14-16 MAY 2025 IF COMMS DIFFICULTIES EXPERIENCED TRY A HIGHER FREQUENCY BAND _____________________________________________________________ SOLAR ACTIVITY FORECAST HF COMMS FADEOUTS 14 May: R2, chance R3 Probable 15 May: R2, chance R3 Probable 16 May: R2, chance R3 Probable