[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 2117 UT on 21 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/67
ISSUED AT 2117UT/21 JUNE 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Depressions to maximum usable frequencies (MUFs) of 10-20% have 
been common during local night hours in the Australian region. 
Similar conditions are expected over 22-24 Jun.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 22-24 JUNE 2025
IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
_____________________________________________________________

HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS
       T-index      MUFs        2  4  6  8 12 16 22 26
_____________________________________________________________
22 Jun:   85   normal/-20%      2  4  6  8  8 12 16 16
23 Jun:   85   normal/-20%      2  4  6  8  8 12 16 16
24 Jun:   85   normal/-20%      2  4  6  8  8 12 16 16

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au