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Australia's benign weather

Old 9th Feb 2020, 01:54
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Australia's benign weather

For all the heroes that keep saying Australiaís weather is benign...

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Old 9th Feb 2020, 01:59
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Doesn't even need an alternate!
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Old 9th Feb 2020, 02:20
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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.
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Old 9th Feb 2020, 02:23
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Originally Posted by 73qanda View Post
I see on the current ATIS it is 3000m RA.
I canít 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.

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Old 9th Feb 2020, 03:25
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Well, it was quite pleasant in Melbourne this weekend seeing the Stranglers...
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Old 9th Feb 2020, 03:53
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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.

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Old 9th Feb 2020, 04:09
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Originally Posted by 73qanda View Post
I can’t see how many ml has fallen in last 10mins/ since 9am.
In maggotdriver's post above in the TTF.
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Old 9th Feb 2020, 04:10
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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.
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Old 9th Feb 2020, 04:13
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Thanks Capt Fathom. ( I went straight to my company weather app which doesn’t show it.....should have read the post properly!)
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Old 9th Feb 2020, 04:14
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Looks like a normal winters day in BIKF or BIRK except for the toasty warm temps...
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Old 9th Feb 2020, 06:08
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Originally Posted by 73qanda View Post
Most definitions I can find on the net have Ďheavy rainí 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.
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.
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Old 9th Feb 2020, 06:12
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Originally Posted by lucille View Post
Looks like a normal winters day in BIKF or BIRK except for the toasty warm temps...
METAR
----------
EICK 090530Z 22035G46KT 2000 -RA OVC002 10/10 Q0982 TEMPO 1500

TAF
----------
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.
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Old 9th Feb 2020, 06:23
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Originally Posted by 73qanda View Post
Most definitions I can find on the net have Ďheavy rainí defined as more than 7.6ml/hr

...

Shame that donít put +RA on the ATIS seeing as many airline ops manuals have specific runway requirements for landing in heavy rain.
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.
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Old 9th Feb 2020, 06:42
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Originally Posted by Stickshift3000 View Post
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.
Thatís not the ATIS, thatís the TTF METAR. The ATIS does not include the rainfall
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Old 9th Feb 2020, 06:47
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Originally Posted by maggotdriver View Post
For all the heroes that keep saying Australiaís weather is benign...
Bwahaha. Ok mate congratulations you had a bit of rain. It still is benign though.
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Old 9th Feb 2020, 06:51
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Cork airport Consol? 3 million pax per annum compared to Kingsford Smith’s 42 million? Pfft. Less passengers than Cairns in Australia. Cork is a backwater and very few crew would actually operate there. The impact on the national transport grid if the weather is bad in Cork would be virtually non existent.

Kingsford Smith on the other hand......

I’m sure we can all find places in the world that have worse weather than Australia but I agree with the point maggotdriver is making. When it gets bad in Australia it can be pretty ordinary!
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Old 9th Feb 2020, 07:01
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Originally Posted by maggotdriver View Post
For all the heroes that keep saying Australiaís weather is benign...
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 arenít challenges, but the weather is generally nice most of the time.
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Old 9th Feb 2020, 07:06
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Now add freezing temps and mixed precipitation, ice, snow etc.
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Old 9th Feb 2020, 07:15
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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?
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Old 9th Feb 2020, 07:29
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Originally Posted by morno View Post
Thatís not the ATIS, thatís the TTF METAR. The ATIS does not include the rainfall
True. You could always call up the AWIS for rainfall.
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