[Ips-hf-warning] SWS HF COMMS WARNING issued 0009 UT on 12 Nov 2017 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS HF RADIO COMMUNICATIONS WARNING 17/48
ISSUED AT 0009UT/12 NOVEMBER 2017
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

The previous HF warning 17/47 issued on 10 November 2017 is extended 
for two more days. The depressed MUF conditions, especially in 
mid and high latitudes region, are the aftermaths of active geomagnetic 
conditions associated with the recurrent coronal hole. MUF are 
expected to recover to near monthly predicted values from 14 
November. HF users are advised to continue to use below monthly 
predicted frequencies today (12 November) and tomorrow (13 November).

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 12-13 NOVEMBER 2017
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
_____________________________________________________________
12 Nov:  -25          -13%      2  4  6  8 12 12 16 22
13 Nov:  -15   normal/-15%      2  4  6  8 12 12 16 22

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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