[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0406 UT on 19 Mar 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC PRELIMINARY HF RADIO COMMUNICATIONS WARNING 26/27
ISSUED AT 0405UT/19 MARCH 2026
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Southern Australian regional MUFs are expected to be depressed 
by up to 20% over 20-21 Mar due to an anticipated increase in 
geomagnetic activity from two CME arrivals and coronal hole wind 
streams.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 20-21 MARCH 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