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Can Planes Fly Over Bad Storms?  
User currently offlineQFA380 From Australia, joined Jul 2005, 2081 posts, RR: 1
Posted (8 years 5 months 2 weeks 1 day 20 hours ago) and read 14087 times:

By bad storms I meant lets say category 3+ Cyclones/Hurricanes/Typhoons and category 4+ thunder storms. I have searched the net and a.net for any information about this but was unsucessful.

Is there high altitude winds above one or unpredictable winds? Is turbulence bad enough to force the plane to detour the storm? I don't know how this came into my head but it did.

I put this in here as I think this forum has the highest number of active users who actually know what they're talking about but if you deem it unnecessary to have it in this forum by all means please move it.

Thanks

10 replies: All unread, jump to last
 
User currently offlineAirPacific747 From Denmark, joined May 2008, 2450 posts, RR: 24
Reply 1, posted (8 years 5 months 2 weeks 1 day 19 hours ago) and read 14090 times:

I think that a hurricane reaches too high up in the air, so a passenger jet would probably fly around it or cancel the flight, if there was a big hurricane in the middle of the route.

[Edited 2006-06-13 09:54:57]

User currently offlineHAWK21M From India, joined Jan 2001, 31702 posts, RR: 56
Reply 2, posted (8 years 5 months 2 weeks 1 day 17 hours ago) and read 14054 times:

I don't think any Pilot would want to attempt this deliberately,unless they find themselves in such a situation.Its too big a risk,not knowing the Impact.
regds
MEL



Think of the brighter side!
User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 3, posted (8 years 5 months 2 weeks 1 day 17 hours ago) and read 14047 times:

Simple answer..NO...!! Commercial aircraft fly much lower then then the altitude of storm tops.


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineFlyMatt2Bermud From United States of America, joined Jan 2006, 563 posts, RR: 7
Reply 4, posted (8 years 5 months 2 weeks 1 day 16 hours ago) and read 14025 times:

We have flown close to hurricanes at FL430 and higher provided our navigable route did not fly into any thunderstorms or embedded cells. I've seen upper level winds in excess of 180mph and remarkably the flight was smooth. Typically in cyclones and hurricanes the heaviest weather is in bands circling the center of low pressure. Average tops of the general precip varies but typically that is FL300 with the cells going much higher. Negotiating those bands that can climb above FL510 is very much like canyon flying. You best know what you are flying into and keep in mind they are changing with the development of the storm. If you get too close you can encounter extreme turbulence, heavy precipitation and hail.

Some straight turbojets engines (and some high time fanjets) can flameout pretty easily in thin unstable air. In the event an engine flames out, you will have to descend to your relight envelope which can put you in weather that you will probably wish you had not ventured into. For safety, it is best to avoid unless you know you have an open escape route.



"When once you have tasted flight, you will forever walk the earth with your eyes turned skyward" Leonardo Da Vinci
User currently offlineRsbj From United States of America, joined Jan 2006, 153 posts, RR: 0
Reply 5, posted (8 years 5 months 2 weeks 1 day 15 hours ago) and read 14014 times:

My guide to weather I can fly over it or not is to figure out if we can fly over it by 1000' for every 10 knots of wind, but never less than 3000'. I would not try flying over the anvil of a thunderstorm using this criteria.

By using our HUD, it makes it very easy to see just how far you'll clear the tops. It also gives us a great view of it's growth or dissipation.



I fly really fast and take a lot of chances.
User currently offlineLitz From United States of America, joined Dec 2003, 1773 posts, RR: 0
Reply 6, posted (8 years 5 months 2 weeks 1 day 15 hours ago) and read 13995 times:
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Consider also that just because you SEE the top of a storm doesn't mean there aren't updrafts ABOVE the top of a storm ..

And as mentioned - you always have to consider where you are going to go if you have to descend rapidly due to depressurization, flameout, et al.

If it's that big, caution is probably the better mode of operation ...

Pass it to the side, and enjoy the view of mother nature at work ...

- litz


User currently offlineSlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 68
Reply 7, posted (8 years 5 months 2 weeks 1 day 13 hours ago) and read 13966 times:

Another answer is maybe, since the U-2 and the SR-71 are airplanes.

I have seen thunderstorms topping seventy thousand feet. There is a rule of thumb to clear thunderstorms by a thousand feet for each knot of windspeed. Personally I like more clearance than that.

I have flown over the top of some little cells that were maybe only twelve to fifteen thousand feet, putting me twenty thousand feet above them. Pretty much a non-event. But crowding closer to them is dangerous. As was stated above, they have violent updrafts, in fact that is what is building them. They can also spit a column of intense rain or hail outside the visible storm.

There was a pretty thorough discussion of this just about two months ago here. I don't remember the thread title but there was some good stuff there.



Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently offlineTu204 From Russia, joined Mar 2006, 1251 posts, RR: 17
Reply 8, posted (8 years 5 months 2 weeks 1 day 8 hours ago) and read 13866 times:

I know a pilot who flew a Tu-160 over a typhoon in the pacific. He was at 17km and that put him about 5km over the disturbances. He did say that it was pretty beautiful from above.


I do not dream about movie stars, they must dream about me for I am real and they are not. - Alexander Popov
User currently offlineQFA380 From Australia, joined Jul 2005, 2081 posts, RR: 1
Reply 9, posted (8 years 5 months 2 weeks 1 day 7 hours ago) and read 13840 times:

Thanks heaps for your replies.

User currently offline411A From United States of America, joined Nov 2001, 1826 posts, RR: 8
Reply 10, posted (8 years 5 months 2 weeks 1 day 5 hours ago) and read 13805 times:

The answer is (as is usual with many aviation questions)...it depends.

In my experience, many typhoons in the western Pacific do not build to significant heights, except for the odd isolated buildups.
So yes, generally these can be overflown with reasonable safety.

However, in the event of an engine failure, or perhaps a diversion for (say) a medical emergency or pressurization failure, one might find yourself having to descend into the nasty weather, so utmost caution is advised.

Usually, extra fuel is uplifted to avoid flying over these storms for prolonged periods.

[Edited 2006-06-14 00:35:01]

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