[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0115 UT on 03 Sep 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/81
ISSUED AT 0114UT/03 SEPTEMBER 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Southern Australian region MUFs are depressed by 40-50% after 
local dawn on 03-Sep. Further depressions are likely throughout 
the UT day. Northern Australian MUFs are currently unaffected 
and near predicted monthly values.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 03 SEPTEMBER 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
_____________________________________________________________
03 Sep:   10          -40%      2  4  4  4  8  8 12 12

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