[Ips-dhfpr] ASWFC Daily HF Prop Report - 13 May 26 issued 2330 UT on 13 May 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/13 MAY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (13 MAY) 
Date   T index  Conditions    
13 May    45    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Depressed by 15% during local day.
      Depressed by 25% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Depressed by 30% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Apr      74
May      71
Jun      68


2. FORECAST (14 MAY - 16 MAY)
Date   T index  Conditions       MUFs                              
14 May    45    Normal           Depressed 15%/near predicted 
                                 monthly values
15 May    50    Normal-fair      Depressed 15%/near predicted 
                                 monthly values    
16 May    50    Normal-fair      Depressed 15%/near predicted 
                                 monthly values   

COMMENT: ASWFC HF Communications Warning 48 was issued on 13 
May and is current for 14-16 May. Maximum Usable Frequencies 
(MUFs) were near predicted monthly values to 15-30% depressed 
in the Australian region on UT day 13-May. Spread-F was observed 
at Hobart and Canberra during local night hours. MUFs are expected 
to be near predicted values to 15% depressed over 14-16 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