FlyerTalk Forums - View Single Post - 70mph winds forecast for tomorrow (8th)

Feb 7, 2016 | 3:24 am

#4

KARFA

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Join Date: Apr 2012

Location: Leeds, UK

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Posts: 48,153

Weather report for tomorrow for Heathrow.

Code:

EGLL 070950Z AUTO 23016KT 9999 FEW028 BKN039 08/02 Q0994 NOSIG

TAF EGLL 070501Z 0706/0812 22013KT 9999 SCT020 
     PROB30 
     TEMPO 0706/0714 8000 SHRA BKN014 
     TEMPO 0710/0714 23016G26KT 
     BECMG 0714/0717 22018G30KT 7000 -RA BKN012 
     PROB40 
     TEMPO 0718/0724 20022G40KT 4000 +RA BKN009 
     BECMG 0723/0802 9999 NSW SCT022 
     PROB30 
     TEMPO 0802/0807 8000 SHRA 
     TEMPO 0807/0812 6000 SHRA BKN012CB 
     BECMG 0808/0811 23022G40KT

The last two lines are the wind noted for tomorrow morning. Tbh it seems less disruptive than Saturday as the wind is no longer coming from due south as it was yesterday but instead from 230 degrees. What this means is the wind has less crosswind component is less.

So yesterday the wind was 80 degrees off runway heading which means the crosswind component was 0.98 x wind speed (inc. gust). So when the wind speed was 40kts the crosswind component was 39.2 kts. The headwind component was only 0.17 x wind speed so 6.8kts.

Tomorrow the wind looks like it will be 40 degrees off runway heading so the crosswind component is now much less at 0.64 x wind speed, and headwind component more at 0.77 x wind speed, giving 25.6kts crosswind component and 30.8ktsheadwind component.

Last edited by KARFA; Feb 7, 2016 at 2:27 pm

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