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Highest ever forecast CB bases - FL100

LFQQ 080500Z 0806/0912 14003KT CAVOK PROB30 TEMPO 0816/0820 VRB15G25KT SHRA BKN100CB PROB30 TEMPO 0903/0909 07013KT SHRA BKN100CB

Shoreham EGKA, United Kingdom

That is really high. I wonder how they arrived at that TAF. Will be interesting to see what develops.

LSZH, Switzerland

It seems they weren’t wrong – this is the metar:

LFQQ 090500Z AUTO 00000KT CAVOK 23/14 Q1017 TEMPO VRB15G25KT SCT100CB

and a new taf with the same:

LFQQ 082300Z 0900/1006 06006KT CAVOK TEMPO 0900/0906 VRB15G25KT SCT100CB TEMPO 0915/1006 VRB15G25KT SHRA SCT100CB

Is it possible to get a lightning strike between a FL100 CB base, and ground? According to e.g. this it is clearly possible.

Shoreham EGKA, United Kingdom

Peter wrote:

Is it possible to get a lightning strike between a FL100 CB base, and ground?


BTW, this is not a FL100 base, this is a 10’000 ft AGL base, so potentially even higher than 10’000 ft AMSL. In the case of LFQQ that difference is marginal however with aprx 150 ft Elevation.

LSZH, Switzerland

I flew past this earlier from LFAT to LFQA. The sky was CAVOK except about a 30nm stretch where you could clearly see a CB buildup from about 10000ft. A bit of deviation to the right worked out well, before clearing it and turning back on course. At one point I was getting a bit close to the Paris class A but it worked out ok. Was really odd to see a cloud like that so high.

EGBP / EGBJ, United Kingdom

These kind over Ile de Ré this evening (sh..t can’t upload from Android…)

Last Edited by greg_mp at 09 Aug 19:55
LFMD, France

Works here, S10e, Chrome

What I think doesn’t work with Android is multiple image upload in one go, although as with all these things it is likely to be browser and OS dependent.

Shoreham EGKA, United Kingdom

These ones:

LFMD, France

I’d say those are at best TCUs, no?

Shoreham EGKA, United Kingdom

I don’t think there is much lightning or rain in those high altitude build outs but you will get load of turbulence and windheer, saw one last 2 weeks not a single strike on the stormscope and don’t think it got wet anywhere along, flying nearby under (slowly) was almost a non-event as long as you keep some blue above

ESSEX, United Kingdom
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