[Ips-dhfpr] ASWFC Daily HF Prop Report - 03 May 25 issued 2331 UT on 03 May 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/03 MAY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (03 MAY) 
Date   T index  Conditions    
03 May   118    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 25% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Apr      123
May      113
Jun      111


2. FORECAST (04 MAY - 06 MAY)
Date   T index  Conditions       MUFs                              
04 May   115    Normal           Near predicted monthly values
05 May   125    Normal           Near predicted monthly values    
06 May   125    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 43 was issued on 
1 May and is current for 2-4 May. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 03-May were near predicted 
monthly values. Significant spread F was observed at Hobart during 
local night hours. Sporadic E was observed in the Cocos Island 
region over 03-May. MUFs are expected to be near predicted monthly 
values over 04-06 May. Further spread F is expected at Hobart. 
There is a chance of mild depressions in the southern Australian 
region on 04-May. Minor 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