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 By Courtesy of the Propagation team   

 G3YLA JIM 

 G0KYA STEVE  

 G4BAO  JOHN  

Its all about the weather

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Link : Windy.com

Live Weather Reports

Pictured :

Jim Bacon G3YLA

NARC club member

and Nick Henwood

RSGB President.

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Propogation News

21st November 2025

 

 HF

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3

After the solar mayhem we reported in last week’s GB2RS, the Sun has been relatively quiet over the past week.

 

The maximum Kp index we saw was four (on the 17th), but otherwise it has often been below one or two. The result is that the ionosphere has been more stable and DX has been more forthcoming. Unfortunately, this has coincided with a drop in sunspot numbers, as the solar flux index has fallen from 163 on the 12th to 123 on Thursday, the 20th.

 

However, 123 is still enough to get things moving, and we have seen some good DX being worked. CDXC’s Slack chat group has reported contacts with VK9DX, Norfolk Island on 15m CW, ZL7/LZ1GC, Chatham Islands, on 40m CW, and S79/OK6RA, Seychelles on 10m CW. An interesting spot was JA7BXS on 80m CW on the morning of Thursday the 20th, showing that the low bands are becoming more interesting as we head into winter.

 

DX on 80m has little to do with the solar flux index, but can be influenced by geomagnetic disturbances; hence, these quieter periods have allowed 40 metres and 80 metres to shine.

For next week, NOAA predicts that the solar flux index may decline even more, perhaps down to 105-110. However, it does look like our run of quiet geomagnetic indices may come to an end, with a Kp index of five predicted for November 24th to 27th. In fact, we could have unsettled geomagnetic conditions until the end of the month.

So this may be a good time to start concentrating on the lower bands, such as 40 metres and 80 metres. You never know, they might surprise you! And don’t forget, it’s CQWW CW across the weekend of the 29th and 30th – always a good opportunity for DX.

VHF and up

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The current spell of unsettled weather is very much in a cold phase, but although it continues to be unsettled, it will be milder and wetter in the upcoming week. Perhaps more important is that at times it will be very windy with gales in some areas. For propagation, this means that the one feature absent from the present charts is any high pressure to bring Tropo conditions.

This means the other modes take on more importance. Aurora has provided some recent interest and although there’s nothing dramatic in the immediate future, keep a watching brief for a rising Kp index, which is a good guide for impending activity if it increases beyond Kp = 5.

 

The rain scatter prospects are likely to be good during the coming week as several active frontal systems cross the country. Notably, Wednesday evening the 19th saw trans-North sea propagation visible on the Margate 24GHz WebSDR at URL trig01.ddns.net:8073, this extended into Thursday morning, but unfortunately, no coastal stations were around to make QSOs.

 

While rainscatter is a GHz band activity, on the lower bands you may find some increase in static levels due to lightning activity or even snow static in the period up to this weekend, before it turns milder.

 

Sporadic-E is not expected to be a strong show in the coming week since we are well out of season. Southern UK stations should continue to watch out for fleeting F-layer DX openings on 50MHz, especially to Africa and Asia

For EME operators, the Moon’s declination is at its lowest and negative all week so Moon window lengths are short and peak elevation is low. We passed apogee on the 20th, so path losses are decreasing again. 144 MHz sky noise is high at the weekend, close to 2,500 Kelvin on Saturday, but falling lower as the week progresses.

 

 G3YLA JIM 

 Please read
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 G0KYA STEVE  

Communications and PR for hi-tech and aerospace companies

  STEVE 's  Beacon List 

G3USF's Worldwide List of HF Beacons

G3USF's Worldwide List Of 50MHz Beacons

Understanding Solar Indices

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