Wardialer From United States of America, joined Sep 2001, 1183 posts, RR: 0 Posted (11 years 9 months 3 weeks 1 day 13 hours ago) and read 1336 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.
Jetguy From , joined Dec 1969, posts, RR:
Reply 1, posted (11 years 9 months 3 weeks 1 day 5 hours ago) and read 1317 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.
Fsuwxman From United States of America, joined Jan 2002, 439 posts, RR: 3
Reply 2, posted (11 years 9 months 3 weeks 23 hours ago) and read 1299 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