[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 2214 UT on 28 Nov 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/112
ISSUED AT 2212UT/28 NOVEMBER 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Australian regional MUFs have become depressed by 15-30% after 
local dawn this morning, possibly in association with mild overnight 
geomagnetic activity. MUFs are expected to recover as the day 
progresses.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 29 NOVEMBER 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
_____________________________________________________________
29 Nov:   65   -20%/normal      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