[Ips-dhfpr] SWS Daily HF Prop Report - 17 August 21 issued 2330 UT on 17 Aug 2021

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 AUGUST 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 AUGUST) 
Date   T index  Conditions    
17 Aug    16    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Near predicted monthly values. Depressions to 25%
      local day and pre-dawn at Darwin.
   Southern Australian Region:
      Near predicted monthly values.
   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
Jul      17
Aug      25
Sep      28


2. FORECAST (18 AUGUST - 20 AUGUST)
Date   T index  Conditions       MUFs                              
18 Aug    15    Normal           Near predicted monthly values
19 Aug    15    Normal           Near predicted monthly values    
20 Aug    10    Normal           Near predicted monthly values   

COMMENT: MUFs in the Australian region on UT day 17 August were 
mostly near predicted monthly values. Sporadic E observed at 
Learmonth afternoon and early evening, and daytime at Darwin. 
Night spread F observed at Hobart. MUFs in the Australian region 
on 18-20 August are expected to be near predicted monthly values 
with occasional depressions to 20%.

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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.

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
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