Snow forecast 12 January

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Jan 12, 2017, 4:02 am

#46

KARFA

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Quote:

Originally Posted by Porky Speedpig

But with winds gusting to 38kt per the TAF and Airbus equipment with windshear warning systems installed that's a mandatory go around if I recall correctly (pilots on here can confirm/correct). Same issue regularly affects LGW I think especially EZY with more recent deliveries.

No mention of forecast windshear in the TAF though. A forecast of wind and gusts does not automatically mean WS. WS is a separate phenomenon.

WS warning is not a mandatory go-around in all situations anyway.

Jan 12, 2017, 4:40 am

#47

wingtip428

Join Date: May 2016

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Windshear procedures vary by airline - one I've worked for required a mandatory go-around for any windshear warning, while another allowed us to treat it as advisory (under fairly limited circumstances) if it was clearly spurious. The systems are pretty good and I wouldn't expect many to be triggered today, but they're not immune to false warnings in gusty conditions.

Also not sure I've ever seen windshear forecast on a TAF? Normally seems to appear on the METAR or ATIS, if at all.

Quote:

Originally Posted by KARFA

Crosswind component is likely to be around 26kts at most so really not that much of an issue.

Ordinarily, no. But if the visibility does drop to 500 metres (unlikely as its only a 30% chance, temporarily, during a 2-hour window), a 26kt crosswind would likely place it outside of many aircraft's autoland limits.

Jan 12, 2017, 4:51 am

#48

BApilotinsider

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Quote:

Originally Posted by wingtip428

Also not sure I've ever seen windshear forecast on a TAF? Normally seems to appear on the METAR or ATIS, if at all.

WS often used in TAF's in the US. Here is the present TAF for IAD.

TAF: KIAD 121137Z 1212/1318 20013G20KT P6SM BKN070 OVC140 WS020/22045KT

Jan 12, 2017, 4:56 am

#49

wingtip428

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Ah, interesting! Very rare in Europe then

Jan 12, 2017, 4:59 am

#50

KARFA

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Quote:

Originally Posted by wingtip428

Indeed. My comment that a wind shear warning is not a mandatory go-around in all situations was entirely based on several conversations with BA pilots over the years who mentioned some of those reasons you noted. Based on that I don't believe BA is one of those airlines which require mandatory go-arounds for wind shear warnings under all circumstances.

Must admit I have very rarely seen wind shear warnings in METARs in the UK - perhaps wind shear is much more prevalent in the US?

Jan 12, 2017, 5:04 am

#51

florens

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Quote:

Originally Posted by KARFA

Must admit I have very rarely seen wind shear warnings in METARs in the UK - perhaps wind shear is much more prevalent in the US?

FWIW, I have seen plenty of WS warnings in METARs for Swiss airports (especially ZRH) and AMS I believe.

Jan 12, 2017, 6:42 am

#52

corporate-wage-slave

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Looking at the T5 departure boards for this evening's flights, I would say about a quarter or a third of shorthaul services have been cancelled for the usual places (MAD, MAN, EDI etc), starting at 15:00 with BA910 to Frankfurt. No lonhauls, and I'm told all the cancellations were done yesterday or early this morning, so hopefully not too many surprises, and mainly to those on connections.

EDIT: Looking at KARFA's list, one longhaul, Jeddah is cancelled, it's not on the screens here yet.

Last edited by corporate-wage-slave; Jan 12, 2017 at 7:05 am

Jan 12, 2017, 7:03 am

#53

KARFA

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As best as I can extract from the LHR website, it seems the following BA flights are cancelled:

Code:

15:00	BA734	Geneva			Cancelled	5
15:00	BA910	Frankfurt		Cancelled	5
15:10	BA1396	Manchester		Cancelled	5
15:10	BA1446	Edinburgh		Cancelled	5
15:35	BA462	Madrid			Cancelled	5
16:05	BA546	Rome			Cancelled	5
16:10	BA920	Stuttgart		Cancelled	5
16:25	BA440	Amsterdam		Cancelled	5
16:30	BA768	Oslo			Cancelled	5
16:35	BA580	Milan			Cancelled	5
16:40	BA336	Paris			Cancelled	5
16:45	BA348	Nice			Cancelled	5
17:00	BA293	Washington		Cancelled	5
17:20	BA322	Paris			Cancelled	5
17:25	BA708	Zurich			Cancelled	5
17:45	BA1492	Glasgow			Cancelled	5
18:20	BA558	Rome			Cancelled	5
18:20	BA828	Dublin			Cancelled	5
18:25	BA972	Hamburg			Cancelled	5
18:30	BA404	Brussels		Cancelled	5
18:30	BA570	Milan			Cancelled	5
18:40	BA988	Berlin			Cancelled	5
18:45	BA598	Venice			Cancelled	5
18:50	BA516	Madrid			Cancelled	5
19:10	BA738	Geneva			Cancelled	5
19:10	BA756	Basel/Mulhouse		Cancelled	5
19:20	BA916	Frankfurt		Cancelled	5
19:25	BA634	Athens			Cancelled	5
19:40	BA946	Duesseldorf		Cancelled	5
19:45	BA958	Munich			Cancelled	5
19:50	BA544	Bologna			Cancelled	5
19:55	BA183	New York		Cancelled	5
20:55	BA1464	Edinburgh		Cancelled	5
22:25	BA133	Jeddah			Cancelled	5

Jan 12, 2017, 7:18 am

#54

Jordan D

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Quote:

Originally Posted by corporate-wage-slave

.... No lonhauls, and I'm told all the cancellations were done yesterday or early this morning, so hopefully not too many surprises, and mainly to those on connections.

EDIT: Looking at KARFA's list, one longhaul, Jeddah is cancelled, it's not on the screens here yet.

And 1 x IAD and 1 x JFK rotations ...

Jan 12, 2017, 8:10 am

#55

MM00LL2

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Ok! So it's 15:10 in The City and it's been drizzling for hours but not so much as a flake yet! Hurry up I want to hint about a snow day tomorrow before I leave the office!!

Jan 12, 2017, 8:44 am

#56

obduro

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Quote:

Originally Posted by MM00LL2

Hurry up I want to hint about a snow day tomorrow before I leave the office!!

Same, southeastern are warning about disruption tonight and tomorrow so I'd better leave early and call it quits for the week...

Jan 12, 2017, 8:53 am

#57

mario

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On my weather app the forecasted snow has now become a rain forecast.

Jan 12, 2017, 9:34 am

#58

rbhout

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my EDI-LCY flight is delayed almost 4 hours because of the adverse weather in LCY at the moment, and all other flights to london are full

Jan 12, 2017, 9:40 am

#59

r00ty

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I'm located around 15m west of LHR. I can report that there is now snow falling. Due to the huge amount of water on the ground I am not expecting it to settle though. So, it looks like the early forecasts (4pm+) were right.

EDIT: OK, quite a lot is falling now. It's settling on cars/grass but not yet on the tarmac.

Last edited by r00ty; Jan 12, 2017 at 9:49 am

Jan 12, 2017, 10:01 am

#60

HIDDY

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Location: Argentina

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I've taken refuge inside from the 35c heat here. During my daily look at the Greenock webcam I see the snow has been falling and lying there. No idea if GLA has been affected though.

It's dark there now so you'll have to take my word for it.

Last edited by HIDDY; Jan 12, 2017 at 10:24 am

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