Australia's benign weather
 

For all the heroes that keep saying Australia’s weather is benign...
https://cimg4.ibsrv.net/gimg/pprune....cb15daa47b.png

Doesn't even need an alternate! :rolleyes: ;)

I see on the current ATIS it is 3000m RA.
I can’t see how many ml has fallen in last 10mins/ since 9am.
Does anyone have that info? I want to work out how many ml / hr 3000m Viz is.

Latest Capital City Observations Sydney Airport

Well, it was quite pleasant in Melbourne this weekend seeing the Stranglers...

There is a an old (1975) Texas Transportation study Rainfall and Visibility - The View from Behind the Wheel that is worth having look at, particularly Fig 9, page 25, although you will need to do some conversions to metric. Alternatively you could play around with the constant for I in equation 7 to give a direct metric value. The report does cover aviation and includes some values used.

In maggotdriver's post above in the TTF.

Thanks a lot I appreciate it.
Most definitions I can find on the net have ‘heavy rain’ defined as more than 7.6ml/hr
I note that YSSY had 13ml between 1:30 and 2:30 local today and the ATIS was saying RA and down to 2000m vis.
So that was heavy rain.
Shame that don’t put +RA on the ATIS seeing as many airline ops manuals have specific runway requirements for landing in heavy rain.
Especially with the friction notams on the shorter runway. W/S and crosswind.

Thanks Capt Fathom. ( I went straight to my company weather app which doesn’t show it.....should have read the post properly!)

Looks like a normal winters day in BIKF or BIRK except for the toasty warm temps...;)

Because I can't help being a pedant, and units can occasionally be important in aviation, rainfall is measured in mm not ml.
i.e. How deep would the water be if it did not drain away rather than the volume of water that fell.

13ml of rain is less than a tablespoon full, and would not wet very much at all.

Just one of my pet annoyances.

METAR
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EICK 090530Z 22035G46KT 2000 -RA OVC002 10/10 Q0982 TEMPO 1500

TAF
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TAF EICK 090500Z 0906/1006 21030G48KT 4000 -RA BKN005 TEMPO 0906/0909 1500 RA BKN002 BECMG 0907/0909 24033G58KT BECMG 0909/0911 9999 NSW FEW018 SCT030 TEMPO 0909/1003 5000 SHRA SCT010 SCT018CB BECMG 0912/0914 26030G48KT BECMG 0917/0919 26023G38KT TEMPO 1003/1006 7000 -SHRA SCT013 SCT018CB
Current weather here in Ireland as I speak.

ATIS includes rainfall in the last 10 minutes, 1.6 mm in the opening post. I guess you could deduce from the definition of heavy rain (that you found) that 1.6 in 10 mins fits the definition.

Cloud size (rainfall area), wind speed (and gust) and droplet size are other variables that will influence visibility.

That’s not the ATIS, that’s the TTF METAR. The ATIS does not include the rainfall

Bwahaha. Ok mate congratulations you had a bit of rain. It still is benign though.

A typical Wellington day!

The fact you think this is noteworthy is proof of just how benign the weather is in Australia.

Not that there aren’t challenges, but the weather is generally nice most of the time.

Now add freezing temps and mixed precipitation, ice, snow etc.

That weather is normal in a lot of the world and certainly wouldn’t warrant a special mention. Although with the effects of climate change in the weather then you may well see this more regularly.......... congratulations I guess?

True. You could always call up the AWIS for rainfall.

The problem in Sydney isn’t just the weather , its the hopelessly inadequate facilities. Once Sydney goes to single runway operations , as it did today, its game over. Holding goes off the scale. Plus the lack of alternates , plus the lack of Cat 3. Europeans operating here would be shocked at how a bit of weather can completely screw things up. I'll take European weather , and Europeans facilities, any day.