[Ips-dhfpr] SWS Daily HF Prop Report - 21 May 22 issued 2331 UT on 21 May 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 MAY 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 MAY) 
Date   T index  Conditions    
21 May    97    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Enhanced by 25% during local night.
   Niue Island Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Enhanced by 30% during local day.
      Enhanced by 35% during local night.
      Enhanced by 25% after local dawn.
   Southern Australian Region:
      Enhanced by 30% during local day.
      Enhanced by 15% 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 (22 MAY - 24 MAY)
Date   T index  Conditions       MUFs                              
22 May    90    Normal           Near to 20% above predicted 
                                 monthly values
23 May    90    Normal           Near to 20% above predicted 
                                 monthly values    
24 May    85    Normal           Near to 20% 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 21 May were mostly enhanced with larger enhancements 
during the day and early evening. Spread F was observed at Hobart 
during night hours and occasionally at Darwin and Brisbane. MUFs 
are expected to be generally enhanced to about 20% above predicted 
monthly values on 22-24 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
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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