[Ips-dhfpr] SWS Daily HF Prop Report - 19 May 22 issued 2331 UT on 19 May 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 MAY 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 MAY) 
Date   T index  Conditions    
19 May    89    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.1 18/2202UT  possible   lower  East Pacific/
                                    North American
  M5.6    0719UT  possible   lower  Mid East/Indian
  M1.5    1009UT  possible   lower  European
  M1.2    1516UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 55% during local day.
      Enhanced by 50% during local night.
      Enhanced by 30% after local dawn.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 45% during local night.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 20% during local night.
      Enhanced by 25% after local dawn.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 20% during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 30% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Apr      77
May      51
Jun      54


2. FORECAST (20 MAY - 22 MAY)
Date   T index  Conditions       MUFs                              
20 May    85    Normal           Near to 15% above predicted 
                                 monthly values
21 May    85    Normal           Near to 15% above predicted 
                                 monthly values    
22 May    85    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: SWS SWF HF Communications Warning 45 was issued on 19 
May and is current for 20-22 May. Maximum usable frequencies 
(MUFs) on UT day 19-May were near monthly predicted values to 
slightly enhanced. Spread-F was observed at Hobart during 1300-2100UT. 
MUFs are expected to be mostly near monthly predicted values 
to slightly enhanced during 20-22 May. Shortwave fadeouts are 
possible during this period.

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For an explanation of some of the terms in this report, go to
https://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
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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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