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Any Aviation Weather Experts?  
User currently offlineWardialer From United States of America, joined Sep 2001, 1201 posts, RR: 0
Posted (13 years 4 months 3 weeks 6 days 20 hours ago) and read 2071 times:

Somewhere on the net I cant remember, but they mentioned measuring the cloud heights in a certain group which for example, 0 to 5000 feet its measured in 100's of feet, 5000 to 10000 feet its measured in 500's of feet, and from 10000' to 20000' plus its 5000s of feet.

Someone please tell me the exact format and the way its measured? The figures were just examples but I dont know if there accurate.

3 replies: All unread, jump to last
User currently offlineJetguy From , joined Dec 1969, posts, RR:
Reply 1, posted (13 years 4 months 3 weeks 6 days 12 hours ago) and read 2052 times:

Good question. I'm not really sure, but that sounds more or less right, except that you'll get reports up to 25,000', not 20,000' - I don't ever remember seeing a weather report that mentioned anything higher. For the straight answer give the folks at your friendly Flight Service Station (1-800-992-7433) a call.

There are a lot of good aviation weather "theory" text books out there, but if you want an excellent "how to fly" weather book I would recommend that you get your hands on a copy of Weather Flying by Robert Buck. It's excellent reading and a valuable resource for those of you just getting started.


User currently offlineFsuwxman From United States of America, joined Jan 2002, 439 posts, RR: 3
Reply 2, posted (13 years 4 months 3 weeks 6 days 6 hours ago) and read 2034 times:

Here is an excerpt from the FAA 7900.5, the surface weather observer's handbook (our bible at work).

Figure 12-3. Increments of Reportable Values for Layer or Ceiling Heights

Range of Height Values (feet)
Reportable Increment (feet)

To nearest 100

>5,000 but <=10,000
To nearest 500

To nearest 1,000

It is how clouds are reported, it just takes into account as higher one looks in the sky, the less correct one will be in judging cloud heights. It is easy to judge the difference between 100ft and 500ft, but it is about impossible to judge between a 11000ft and 11100ft or even 11000ft or 11500ft.

Hope this helps... If you want to look for yourself


ASOS... Another Shi#y Observation Station
User currently offlineWardialer From United States of America, joined Sep 2001, 1201 posts, RR: 0
Reply 3, posted (13 years 4 months 3 weeks 6 days 1 hour ago) and read 2041 times:

Yes this helps a lot and thanks for the link.

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