[Ips-whfpr] ASWFC Weekly Prop. Report (26 August 26) issued 0119 UT on 26 Aug 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY HF PROPAGATION REPORT
ISSUED ON 26 AUGUST 2026 
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 AUGUST - 25 AUGUST)
Date   T index   Conditions        
19 Aug   71      Normal            
MUFS:
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

20 Aug   73      Normal            
MUFS:
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

21 Aug   78      Normal            
MUFS:
   Niue Island Region:
      Enhanced by 15% during local day.
      Depressed by 20% during local night.
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

22 Aug   77      Normal            
MUFS:
   Niue Island Region:
      No data available during local day.
      No data available during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 15% over the UT day.

23 Aug   73      Normal            
MUFS:
   Niue Island Region:
      No data available during local day.
      No data available during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 20% over the UT day.

24 Aug   79      Normal            
MUFS:
   Niue Island Region:
      No data available during local day.
      No data available during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

25 Aug   79      Normal            
MUFS:
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 85% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 20% over the UT day.

Predicted Monthly T index for August:  64

2. FORECAST (26 AUGUST - 01 SEPTEMBER) 
MUFS: 
Maximum Usable Frequencies (MUFs) are expected to be near predicted monthly
values
this week, though depressions of 10-15% are possible on 28-Aug due to expected
geomagnetic activity.

Propagation conditions: Mostly normal propagation conditions are expected this
week,
with normal to fair conditions on 28-Aug due to anticipated geomagnetic
activity.
Shortwave fadeouts are possible throughout the week.

T index: 70
ASWFC SWF HF Communications Warning 77 was issued on 25 August 
and is current for 25-27 Aug.

3. OUTLOOK (02 SEPTEMBER - 02 OCTOBER)
Degraded HF propagation conditions possible:
 14-15 Sep

PLEASE NOTE:
Space weather conditions can frequently be determined by short 
timescale events that cannot be forecast a week in advance,
particularly at solar maximum.

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