[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0032 UT on 13 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC PRELIMINARY HF RADIO COMMUNICATIONS WARNING 25/62
ISSUED AT 0032UT/13 JUNE 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Southward Bz conditions from a recent coronal hole may cause 
depressions to maximum usable frequencies by 10-15% on 13-Jun. 
Further depressions are possible over 14-16 June due to another 
connecting coronal hole.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 13-16 JUNE 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