[Ips-dhfpr] SWS Daily HF Prop Report - 21 November 21 issued 2331 UT on 21 Nov 2021

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 NOVEMBER 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 NOVEMBER) 
Date   T index  Conditions    
21 Nov   -19    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Depressed by 20% 02-05 UT. Near predicted monthly
      values 00-01, 06-10 UT. No data available 11-21 UT.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Northern Australian Region:
      Depressed by 25% during local day.
      Depressed by 20% during local night.
   Southern Australian Region:
      Depressed by 30% during local day.
      Depressed by 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 20% depressed.

PCA Event : No event.

Monthly T index:
Month  T index
Oct      18
Nov      32
Dec      35


2. FORECAST (22 NOVEMBER - 24 NOVEMBER)
Date   T index  Conditions       MUFs                              
22 Nov    -5    Normal-fair      15 to 25% below predicted monthly 
                                 values
23 Nov   -10    Normal-fair      20 to 30% below predicted monthly 
                                 values    
24 Nov   -10    Normal-fair      20 to 30% below predicted monthly 
                                 values   

COMMENT: SWS HF Communications Warning 36 was issued on 21 November 
and is current for 21-22 Nov. MUFs in the Australian region on 
UT day 21 November were mostly 15-30% depressed. Occasional sporadic 
E was observed at Perth, Hobart, Canberra and Niue, blanketing 
the F region at Canberra 11 and 17-18 UT. Depressed conditions 
are expected to continue 22-24 November.

----------------------------------------------------------
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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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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