Go Back  PPRuNe Forums > PPRuNe Worldwide > Canada
Reload this Page >

Turbulence in CYYT

Canada The great white north. A BIG country with few people and LOTS of aviation.

Turbulence in CYYT

Old 6th Feb 2018, 18:23
  #1 (permalink)  
Thread Starter
 
Join Date: Feb 2018
Location: Seville (Spain)
Posts: 4
Turbulence in CYYT

Hi pals,
Anyone familiar with approaches to CYYT?
I read in my charts the following CAUTION note, "Precipitous terrain on APCH. Moderate to severe turbulence, windshear and downdrafts may be encountered".
I'm used to operate ETOPS with CYYT as ERA, and would like to have some more complimentary information about this particularity due to the orography of St John's. In other airports you can find some information regarding wind directions and speed range that makes it more likely to find this type of turbulence. Does anyone have information for CYYT?

Thank you!
IReadYou5 is offline  
Old 7th Feb 2018, 16:32
  #2 (permalink)  
 
Join Date: May 2013
Location: Canada
Posts: 71
Historic wx and almanac info

I am on the ground here at CYYT.


Try this link, there is a link to historic wind speed and direction - it may help. The folks who publish it are Environment Canada, you might get exactly what you need by contacting them directly if these data are insufficient.


Almanac Averages and Extremes for February 06 - Climate - Environment and Climate Change Canada


Best,


Pete

Last edited by Viper 7; 7th Feb 2018 at 16:33. Reason: splelling
Viper 7 is offline  
Old 7th Feb 2018, 19:26
  #3 (permalink)  
Thread Starter
 
Join Date: Feb 2018
Location: Seville (Spain)
Posts: 4
Dear Pete,
Thank you very much for your answer.
Unfortunately I can't find here the information I'm seeking for. I'm sure I didn't explain myself properly. I try again with an example.
In Bilbao (Spain) LEBB, we can find the following company published information,
"[I]When wind direction is between 160 and 230 degrees and with an intensity of more than 15KT expect moderate to severe turbulence and vertical windshear. If intensity is more than 20KT from this direction, it
is not recommended to operate at this airport without favorable PIREPS."
[/I]

As CYYT looks an airdrome where you have a high probability of encountering MOD-SEV turbulence, I thought there could be any publication (maybe Air Canada?) refering wind direction and intensity that makes more probable of resulting in turbulence during approach, or even, as in LEBB, unrecommending to operate.

Thank you!

Jesús.
IReadYou5 is offline  
Old 7th Feb 2018, 21:09
  #4 (permalink)  
 
Join Date: Apr 2000
Location: BC
Posts: 451
Flown there a lot. RWY 11, expect severe downdrafts with a strong West/NW wind. Severe subsiding air as it passes over the airport and spills down the cliffs at the approach end. Rock and Roll! You need to have some good 'hands and feet' skills. All in a day's fun.
777AV8R is offline  
Old 8th Feb 2018, 01:58
  #5 (permalink)  
 
Join Date: Apr 2005
Location: yyz
Posts: 32
Fun begins at 40 in yyt, kts that is....... i forget the number, but when they preface "cleared to land at your discretion" you know it is going to be sporting
rigpiggy is offline  
Old 8th Feb 2018, 05:39
  #6 (permalink)  
 
Join Date: Apr 2000
Location: BC
Posts: 451
Calm Day

Originally Posted by rigpiggy View Post
Fun begins at 40 in yyt, kts that is....... i forget the number, but when they preface "cleared to land at your discretion" you know it is going to be sporting
40K is considered calm there, isn’t it?
777AV8R is offline  
Old 8th Feb 2018, 12:34
  #7 (permalink)  
 
Join Date: May 2013
Location: Canada
Posts: 71
I am not aware of any published warnings with that level of detail for CYYT.


It is a very windy location, that is for certain, particularly in the winter. Here is our METAR at the moment for instance:


METAR CYYT 081300Z 20030G42KT 15SM -RA SCT040 OVC076 05/04 A2987 RMK
SC3AC5 SLP121=



I expect approaches to 29 would be similarly challenging with winds over 40 knots given the terrain on short final. I fly a jet ranger from a private pad in those hills just short final on 29 and we watch the winds very carefully indeed.
Viper 7 is offline  
Old 8th Feb 2018, 13:28
  #8 (permalink)  
 
Join Date: Jun 2006
Location: Canada
Posts: 1,306
Things do get a bit breezy on the "Rock", however if one keeps a firm hand on the throttle's {Thrust levers to the collage grads!} and get rid of auto throttles all will be well, the only aircraft I have had any problem holding the glide path when IMC was the Viscount when fully loaded, but it never got to the point of having to overshoot, its a great place for spending a layover and the population are the friendliest and most welcoming in the world!
clunckdriver is offline  
Old 10th Feb 2018, 10:05
  #9 (permalink)  
Thread Starter
 
Join Date: Feb 2018
Location: Seville (Spain)
Posts: 4
Thank you all for the feedback

Dear ALL,
Thank you very much for all this valuable feedback. I got it! Though I understand it's not more detailly published, ok, with your experience feedback I can figure out how it is a windy (usual) day approach into St John's.
Thanks!
IReadYou5 is offline  
Old 11th Feb 2018, 15:19
  #10 (permalink)  
 
Join Date: Jan 2008
Location: On the lake
Age: 79
Posts: 665
If you come from away, Gander (CYQX) is not far as an alternate.
twochai is offline  
Old 15th Feb 2018, 07:55
  #11 (permalink)  
Thread Starter
 
Join Date: Feb 2018
Location: Seville (Spain)
Posts: 4
Thank you vary much for your feedback.
Yes, sometimes Gander is our first decision for ETOPS planning according to WX minima, as well as CYJT or CYHZ, for example. None of this other airports have the singularity of the "you may expect turbulence during approach" published for CYYT, and though that's not a regulated determining WX condition for ETOPS planning, I think it should be very seriously taken into account. It's not very smart to divert your flight with one engine out to an airport where you'll probably encounter severe turbulence. CRM should start at the office, right?

Originally Posted by twochai View Post
If you come from away, Gander (CYQX) is not far as an alternate.
IReadYou5 is offline  
Old 15th Feb 2018, 20:21
  #12 (permalink)  
bzh
 
Join Date: Jun 2004
Location: canada
Posts: 81
Yyt is a place you can get moderate turbulence on the ground sitting at the gate....
bzh is offline  
Old 15th Feb 2018, 22:13
  #13 (permalink)  
 
Join Date: Feb 2006
Location: On the dark side of the moon
Posts: 962
Originally Posted by bzh View Post
Yyt is a place you can get moderate turbulence on the ground sitting at the gate....
... on a good day!
J.O. is offline  
Old 17th Jul 2020, 20:00
  #14 (permalink)  
 
Join Date: Apr 2005
Location: yyz
Posts: 32
My record is 55 direct,in yhz sporting to the extreme(right after MK airlines). My F/O's(JB) leg into deer lake ydf was 48G63 at 30 off. Carried lots of extra as our ASI went from Vref to Vfe continuously 115-170. we touched down at about 70kts on the gps and 140 indicated. Most fun as you can have with yer clothes on
rigpiggy is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.