[Ips-hf-warning] SWS HF COMMS WARNING issued 2256 UT on 07 Nov 2018 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS HF RADIO COMMUNICATIONS WARNING 18/13
ISSUED AT 2254UT/07 NOVEMBER 2018
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

Expect near predicted MUFs to 20% depressions on 8-9 November 
due to continued very low levels of ionising radiation. On 10 
November expect deeper depressions to 30% and some degradation 
in HF communication induced by an increase in geomagnetic activity 
on 09 November leading to ionospheric storming.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 08-10 NOVEMBER 2018
IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
_____________________________________________________________

HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS
       T-index      MUFs        2  4  6  8 12 16 22 26
_____________________________________________________________
08 Nov:  -20   normal/-20%      2  4  6  8  8 12 16 16
09 Nov:  -20   normal/-20%      2  4  6  8  8 12 16 16
10 Nov:  -35        10-30%      2  4  6  6  8 12 16 16

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386                         WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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