[Ips-dhfpr] ASWFC Daily HF Prop Report - 15 May 26 issued 2330 UT on 15 May 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/15 MAY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (15 MAY) 
Date   T index  Conditions    
15 May    47    Normal         

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 20% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Depressed by 15% during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 20% after local dawn.
   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 (16 MAY - 18 MAY)
Date   T index  Conditions       MUFs                              
16 May    55    Normal-fair      Near predicted monthly values/depressed 
                                 5 to 15%
17 May    60    Normal-fair      Near predicted monthly values    
18 May    65    Normal           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 depressed by 15% in the northern Australian region, 
with frequencies mostly near predicted monthly vales in the southern 
region. Spread-F was observed at Hobart during local night hours. 
MUFs are expected to be near predicted monthly values over 16-18 
May, with depressions of up to 15% expected in the first half 
of the day of 16-May in the southern Australian region.

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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