[Ips-hf-warning] SWS HF COMMS WARNING issued 2302 UT on 12 Dec 2017 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS HF RADIO COMMUNICATIONS WARNING 17/53
ISSUED AT 2302UT/12 DECEMBER 2017
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

Minor to moderate MUF depressions and degradations in HF conditions 
in high and mid latitude southern hemisphere regions are possible 
from 13 to 14 December. These depression are the aftermath of 
disturbed conditions associated with a coronal hole, and will 
be more prominent in the summer hemisphere.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 13-14 DECEMBER 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
_____________________________________________________________
13 Dec:  -20          -10%      2  4  6  8 12 16 16 22
14 Dec:  -16   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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