[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 May 23 issued 2331 UT on 25 May 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 MAY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 MAY) 
Date   T index  Conditions    
25 May    91    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    1446UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

PCA Event : No event.

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


2. FORECAST (26 MAY - 28 MAY)
Date   T index  Conditions       MUFs                              
26 May   100    Normal           Near predicted monthly values
27 May   110    Normal           Near predicted monthly values 
                                 tp 10-15% enhanced    
28 May   115    Normal           Near predicted monthly values 
                                 to 15-20% enhanced   

COMMENT: ASWFC SWF HF Communications Warning 50 was issued on 
25 May and is current for 26-28 May. Maximum usable frequencies 
(MUFs) on UT day 25-May were near predicted monthly values in 
the Australian region. Spread-F was observed in Townsville, Brisbane 
and Hobart during local night hours. MUFs are expected to be 
near predicted monthly values over 26-28 May, with enhancements 
of 15-20% possible later in the period. 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