[Ips-hf-warning] ASWFC HF COMMS WARNING issued 0032 UT on 30 Sep 2022 [SEC=OFFICIAL]

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SUBJ: ASWFC PRELIMINARY HF RADIO COMMUNICATIONS WARNING 22/75
ISSUED AT 0030UT/30 SEPTEMBER 2022
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

++ CORRECTION OF HF PRELIMINARY WARNING 74 +++

Degraded HF communication conditions are expected for middle 
to high latitudes (southern Australian region) during the interval 
01-02 Oct. The degraded conditions are expected due to anticipated 
geomagnetic activity induced by a coronal hole high speed wind 
stream. An ASWFC HF MUF depression warning will follow this preliminary 
warning if ionospheric frequency depressions eventuate after 
local dawn during the disturbance period. Northern Australian 
region MUFs are expected to remain near predicted monthly values.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 01-02 OCTOBER 2022
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