[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 2149 UT on 04 Nov 2023 [SEC=OFFICIAL]

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SUBJ: ASWFC PRELIMINARY HF RADIO COMMUNICATIONS WARNING 23/109
ISSUED AT 2149UT/04 NOVEMBER 2023
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Due to several CME impacts and a coronal hole wind stream expected 
to induce geomagnetic activity, degradations to HF radio communication 
are expected over 05-07 Nov. Maximum usable frequencies (MUFs) 
are expected to become 10-20% depressed over this period. The 
strongest degradations and depressions are expected during local 
night and dawn hours. Some equatorial scintillation is possible 
over 05-06 Nov.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 05-07 NOVEMBER 2023
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