[Ips-hf-warning] SWS HF COMMS WARNING issued 2355 UT on 07 Dec 2016 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS HF RADIO COMMUNICATIONS WARNING 16/65
ISSUED AT 2354UT/07 DECEMBER 2016
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

The earth ionosphere is currently under the influence of disturbed 
solar winds associated with a large southern hemisphere coronal 
hole. The HF depressions are currently been experienced in the 
high latitude regions. Over the next four days (08-11 December), 
the high latitude depressions are expected to extend into the 
low latitude regions as the disturbed geomagnetic conditions 
persist. HF users are advised to use lower than the monthly predicted 
frequencies.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 08-11 DECEMBER 2016
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 Dec:    0   normal/-15%      2  4  6  8 12 12 16 22
09 Dec:  -10          -13%      2  4  6  8 12 12 16 22
10 Dec:  -20          -17%      2  4  6  8  8 12 16 22
11 Dec:   10   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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