[Ips-hf-warning] SWS HF COMMS WARNING issued 2344 UT on 21 Mar 2017 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS HF RADIO COMMUNICATIONS WARNING 17/20
ISSUED AT 2343UT/21 MARCH 2017
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

The Earth's ionosphere is currently under the influence of a 
strong solar wind stream associated with the recurrent coronal 
hole. This effect is expected to raise the geomagnetic activity 
to minor storm levels on 22 and 23 March. This expected increase 
in geomagnetic activity levels is likely to result in minor to 
moderate depressions in MUFs and degradations in HF conditions 
on 22 and 23 March.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 22-23 MARCH 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
_____________________________________________________________
22 Mar:    0   normal/-30%      2  4  6  6  8 12 16 16
23 Mar:    0   normal/-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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