We've been burned ourselves :-)
My notes say:
- a circle for calm winds (0 speed)
- a shaft with no barbs<= 2.5 knots
- a shaft with a half barb for > 2.5 and< 7.5 knots
Please let us know if you have further questions.
Unidata IDV Support
On 4/16/13 3:02 PM, Chris Herbster wrote:
Before I attempt to look through code that I don't know (in a language
I can barely read), can anyone help with a definitive answer to the
thresholds used to draw a "calm" circle around a station, a shaft with
no barbs, and then the 5 knot increment for the barbs? (I assume that
a "short barb" for "5 kts" is drawn is speed is >2.5 kts and <= 7.5,
but I have gotten burned by an assumption more than once in the past!)
As always, any help is welcome!