[Ips-dhfpr] ASWFC Daily HF Prop Report - 29 May 23 issued 2331 UT on 29 May 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/29 MAY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (29 MAY) 
Date   T index  Conditions    
29 May    75    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 30% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

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


2. FORECAST (30 MAY - 01 JUNE)
Date   T index  Conditions       MUFs                              
30 May    75    Normal-fair      Near predicted monthly values 
                                 to 15-20% depressed
31 May    75    Normal-fair      Near predicted monthly values 
                                 to 15-20% depressed    
01 Jun    75    Normal-fair      Near predicted monthly values 
                                 to 15-20% depressed   

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 29-May were near predicted monthly values to 
20% depressed during local night hours. Strong spread-F was observed 
in Hobart; sporadic-E was observed at Townsville, Brisbane and 
Cocos Islands, and general degraded conditions were observed 
in Darwin and Brisbane. MUFs are expected to be near predicted 
monthly values over 30-May to 01-Jun, with some mild depressions. 
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