[Ips-dhfpr] ASWFC Daily HF Prop Report - 28 November 22 issued 2330 UT on 28 Nov 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 NOVEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 NOVEMBER) 
Date   T index  Conditions    
28 Nov    57    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values.
      Brief 50% enhancement during 04-05UT.
   Northern Australian Region:
      Enhanced by 15-20% during 00-06UT.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
      West coast depressed 15-30% during 00-04UT.
      Depressed 15-20% after 20UT.
   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
Oct      83
Nov      70
Dec      70


2. FORECAST (29 NOVEMBER - 01 DECEMBER)
Date   T index  Conditions       MUFs                              
29 Nov    45    Normal-fair      Depressed 10 to 20%/near predicted 
                                 monthly values
30 Nov    50    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values    
01 Dec    50    Normal           Depressed 10 to 15%/near predicted 
                                 monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 90 was issued 
on 27 November and is current for 30 Nov to 1 Dec. Maximum usable 
frequencies (MUFs) on UT day 28-Nov were variable with western 
Australian region MUFs initially depressed 20-30% and northern 
Australian region MUFs enhanced by 20% early in the UT day, then 
MUFs returned to near normal levels. MUFs are generally expected 
to be 15% depressed to near predicted monthly values. Degraded 
HF conditions may be experienced during local night hours 29-Nov 
to 01-Dec for the southern Australian region due to mildly enhanced 
geomagnetic conditions induced by coronal hole wind streams.

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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