[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 November 23 issued 2330 UT on 21 Nov 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 NOVEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 NOVEMBER) 
Date   T index  Conditions    
21 Nov    88    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 20% after local dawn.
   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
Oct      130
Nov      100
Dec      98


2. FORECAST (22 NOVEMBER - 24 NOVEMBER)
Date   T index  Conditions       MUFs                              
22 Nov    75    Fair-normal      Depressed 10 to 25%/near predicted 
                                 monthly values
23 Nov   110    Normal           Near predicted monthly values    
24 Nov   110    Normal           Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 116 was issued on 21 
November and is current for 22 Nov only. Maximum usable frequencies 
(MUFs) in the Australian region on 21-Nov were variable with 
some southern region sites depressed 15-20% during the local 
day. Northern Australian regional MUFs were mostly near predicted 
monthly values. Similar conditions are expected for today, with 
southern Australian regional MUFs expected to be depressed 15-20% 
on 22-Nov during the local day, then generally near predicted 
monthly values for 22-24 Nov. Northern Australian region MUFs 
are expected to remain near normal. 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