The models need updating or initialising with real observations.
According to the BoM in Brisbane, Brisbane at least still launches
balloons for the Observations they publish.
The bloke I spoke to thought this was also the case for the other
stations on the aerological diagrams page.
You can do all the modelling you like but weather models drift from
reality over time. A few days is all it takes. Nowadays they at least
still look like real weather charts. They didn't used to after a while.
Hence the need to update with real data.
Mike
At 10:43 AM 21/08/2014, you wrote:
On Aug 21, 2014, at 10:07 AM, Mike Borgelt
<mborg...@borgeltinstruments.com> wrote:
> Matt Gage is right too. The chart tells you what was happening at
the time of the balloon flight.
It used to, but it doesn't anymore.
The chart is essentially an extract from the BoM's global
atmospheric model. The date of the chart doesn't necessarily bear
any resemblance to the date of the balloon (or, indeed, whether
there's a balloon at all)
- mark
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