[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 2148 UT on 16 Apr 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC PRELIMINARY HF RADIO COMMUNICATIONS WARNING 26/36
ISSUED AT 2148UT/16 APRIL 2026
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

The Earth is expected to enter a coronal hole wind stream late 
in the UT day on 17-Apr. The southern Australian regional ionosphere 
is expected to become depressed and degraded at times from late 
in the UT day on 18-Apr to 20-Apr.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 18-20 APRIL 2026
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