[Ips-whfpr] ASWFC Weekly Prop. Report (19 April 23) issued 0148 UT on 19 Apr 2023 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY HF PROPAGATION REPORT
ISSUED ON 19 APRIL 2023 
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 APRIL - 18 APRIL)
Date   T index   Conditions        
12 Apr  114      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Enhanced by 55% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 20-25% during local night and after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

13 Apr  122      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Enhanced by 85% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 45% during local night.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 20-25% during local night and after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 25% over the UT day.

14 Apr  129      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 40% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 40% during local night.
      Enhanced by 20% after local dawn.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Enhanced by 25% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 30% over the UT day.

15 Apr  123      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 80% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Enhanced by 15-25%.
   Southern Australian Region:
      Enhanced by 15-25%.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 25% over the UT day.

16 Apr  123      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 40-90% 
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Northern Australian Region:
      Enhanced by 15-35% 
   Southern Australian Region:
      Enhanced by 15-30% 
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

17 Apr  119      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 100% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 20-30% during local night and after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 20-25% during local night and after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 20% over the UT day.

18 Apr  117      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 45% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 30% 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.
      Enhanced by 15-20% during local night and after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 30% over the UT day.

Predicted Monthly T index for April:  84

2. FORECAST (19 APRIL - 25 APRIL) 
MUFS: Brief mild depressions are possible after local dawn over 19-21 Apr for
southern Australian regions. MUFs are expected to be enhanced by 15-20% 
on other days.

Propagation conditions: Fair during local night hours over 19-21 Apr. 
Otherwise normal. SWFs are possible early in the week.

T index: 84
ASWFC SWF HF Communications Warning 37 was issued on 16 April 
and is current for 17-19 Apr.

3. OUTLOOK (26 APRIL - 26 MAY)
Degraded HF propagation conditions possible:
26-27 Apr, 7-8 May, 23-24 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