[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 1206 UT on 10 Nov 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC PRELIMINARY HF RADIO COMMUNICATIONS WARNING 25/107
ISSUED AT 1205UT/10 NOVEMBER 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Due to strong to severe geomagnetic storming expected over 11-12 
Nov, HF conditions are expected to become depressed up to 20% 
on 11-Nov and 40-50% on 12-Nov. Conditions may begin to improve 
by 13-Nov but are still expected to be depressed by 10-30%.
Equatorial scintillation is possible on 12-Nov. 

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 11-13 NOVEMBER 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