[Ips-dhfpr] ASWFC Daily HF Prop Report - 28 May 23 issued 2330 UT on 28 May 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 MAY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 MAY) 
Date   T index  Conditions    
28 May    87    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    1036UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 25% after local dawn.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Apr      120
May      87
Jun      88


2. FORECAST (29 MAY - 31 MAY)
Date   T index  Conditions       MUFs                              
29 May    90    Normal           Near predicted monthly values
30 May    90    Normal           Near predicted monthly values    
31 May    90    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 52 was issued on 
28 May and is current for 29-31 May. Maximum usable frequencies 
(MUFs) on UT day 28-May were generally near predicted monthly 
values Spread-F was observed during local night hours indicating 
degraded HF communication conditions overnight. MUFs are expected 
to be near predicted monthly values over 29-31 May. Isolated 
shortwave fadeouts are possible.

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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.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au