[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 2327 UT on 31 Aug 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC PRELIMINARY HF RADIO COMMUNICATIONS WARNING 25/79
ISSUED AT 2327UT/31 AUGUST 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Due to an anticipated CME arrival late on 1-Sep or early 2-Sep 
UT day, maximum usable frequencies in the Australian region may 
become depressed up to 20%.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 02-03 SEPTEMBER 2025
IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
A MORE DETAILED HF WARNING WILL FOLLOW IF DEPRESSIONS EVENTUATE.
_____________________________________________________________

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