[Ips-whfpr] ASWFC Weekly Prop. Report (26 April 23) issued 0146 UT on 26 Apr 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY HF PROPAGATION REPORT
ISSUED ON 26 APRIL 2023 
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 APRIL - 25 APRIL)
Date   T index   Conditions        
19 Apr  127      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 15% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 50% during local night.
      Enhanced by 20% after local dawn.
   Southern Australian Region:
      Enhanced by 25% during local day.
      Enhanced by 20% during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

20 Apr  125      Fair-normal       
MUFS:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 50% during local night.
   Niue Island Region:
      Enhanced by 50% during local day.
      Enhanced by 50% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 30% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 25% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

21 Apr  114      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Enhanced by 45% during local night.
   Niue Island Region:
      Enhanced by 30% during local day.
      Enhanced by 45% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 30% over the UT day.

22 Apr  116      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 95% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

23 Apr  115      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 35% during local night.
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 20% during local night.
      Depressed by 35% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

24 Apr  109      Fair-poor         
MUFS:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 90% during local night.
      Enhanced by 35% after local dawn.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 20-35% during local night and after local dawn.
   Southern Australian Region:
      Depressed by 40% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 35% over the UT day.

25 Apr  103      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Enhanced by 70% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 45% during local night.
   Northern Australian Region:
      Enhanced by 25% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

Predicted Monthly T index for April:  84

2. FORECAST (26 APRIL - 02 MAY) 
MUFS: Mild depressions are possible on 27-29 Apr
MUFs are expected to be near predicted monthly 
values to 15% enhanced on other days.

Propagation conditions: Fair conditions are 
possible on 27-29 Apr. Normal propagation 
conditions are expected on other days. 
Shortwave fadeouts are possible later in the week. 

T index: 110

3. OUTLOOK (03 MAY - 02 JUNE)
Degraded HF propagation conditions possible:
6-8 May, 23-26 May

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