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#1433658 - 11/09/2017 15:13 Re: NSW/ACT day to day weather [Re: Grant]
Kino Offline
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Registered: 10/08/2017
Posts: 2830
Loc: Wollongong, NSW, Aus
Found this - great visualisation of where the rain falls - clearly the area around Saddleback --> Barrengarry --> Knights Hill is very wet all year around. *looks for properties there*



Edited by Kino (11/09/2017 15:13)

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#1433660 - 11/09/2017 15:51 Re: NSW/ACT day to day weather [Re: Grant]
DaveM Offline
Meteorological Motor Mouth

Registered: 21/05/2001
Posts: 10147
Loc: Bathurst NSW about 700 m asl
The Dark Red Zone is similar to what we have out here - on average, not this year of course!! smile

Would be plenty of very damp/soaking wet gullies in some of those areas, imagine under those cliff lines etc, especially on the shady side of the escarpment. Eg Below Fitzroy Falls etc - surely leech heaven smile

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#1433676 - 11/09/2017 19:22 Re: NSW/ACT day to day weather [Re: Grant]
Wave Rider Offline
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Registered: 27/01/2014
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Kino- I'd prefer to move somewhere with less rain than here, not more!! smile We really do need the rain at the moment though. Great map.
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#1433683 - 11/09/2017 21:00 Re: NSW/ACT day to day weather [Re: Grant]
Wave Rider Offline
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Registered: 27/01/2014
Posts: 7050
Was a brilliant day today. Finally nice and warm, but the afternoon was just a touch cool. When I got off the bus at North Gong station I could smell the seabreeze immediately. The seabreeze pushed through here too. There was quite a lot of mid level cloud in the late arvo and haze settled at the base of the escarpment. It looked like a nice landscape.

Tomorrow looks even more fantastic and the next day even better!!!


Edited by Wave Rider (11/09/2017 21:01)
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#1433688 - 11/09/2017 21:45 Re: NSW/ACT day to day weather [Re: Grant]
EddyG Offline
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Registered: 19/12/2008
Posts: 5126
Loc: Port Stephens NSW
It certainly was a nice day WR, was some spectacular lenticular clouds about late this arvo. And yes looking forward to the next couple of days myself!!
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#1433704 - 12/09/2017 09:11 Re: NSW/ACT day to day weather [Re: Grant]
Wave Rider Offline
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Registered: 27/01/2014
Posts: 7050
Indeed, if this lee wave cloud clears away. You can see it backbuilding on the satellite, so we'll see what happens.
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The longer you wait for storms, the more you appreciate them.

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#1433705 - 12/09/2017 09:15 Re: NSW/ACT day to day weather [Re: Wave Rider]
Kino Offline
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Registered: 10/08/2017
Posts: 2830
Loc: Wollongong, NSW, Aus
Originally Posted By: Wave Rider
Indeed, if this lee wave cloud clears away. You can see it backbuilding on the satellite, so we'll see what happens.


Sure is weird - it's actually quite warm (21 already) yet the cloud makes it feel cooler. If it doesn't clear (good chance) it may not even get past average UNLESS those NW'ers kick in soon.

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#1433708 - 12/09/2017 09:30 Re: NSW/ACT day to day weather [Re: Grant]
kizz Offline
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Registered: 11/02/2002
Posts: 2059
Loc: Beacon Hill, Sydney 152m asl
The NW wind was blowing through my place in fits and bursts this morning. Being at 150m I seem to be one of the first places to get these gorgeous nor-westers as they mix down. So it is there and just above our heads.

And this wretched lee wave cloud. I'm not surprised but still annoyed it is here. It seems to prevent the sun from helping the gradient wind mix down. Kind of as if the strong winds just above our heads are keeping any ground inversions in place.


Edited by kizz (12/09/2017 09:31)
Edit Reason: space time anomaly

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#1433710 - 12/09/2017 09:37 Re: NSW/ACT day to day weather [Re: Kino]
ozthunder Offline
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Registered: 23/09/2001
Posts: 3209
Loc: Mt Warrigal, NSW, Australia
Originally Posted By: Kino
For Wollongong peep's, whilst digging around for a decent Illawarra rainfall map, found the following interesting paper from 1979!

Excerpt:

Quote:
The triggering of slope failure by prolonged or intense rainfall has been demonstrated in many environments. For the Wollongong area the critical minimum monthly rainfall needed to trigger such movements is about 250mm; failures were reported in 40% of months with rainfall in excess of this threshold level (Young, 1978). On the escarpment there is a 30.QO% chance that this threshold will be exceeded in February alone, and a 10-30% chance that it will be exceeded in any of the months in autumn, winter and early summer. "Rainfalls likely to induce landslip are clearly a normal and, in historical time, not an infrequent feature of the climate of the lIIawarra" (Young, 1978).

The threat of slope failure increases with height of the escarp- ment because of increasing rainfall as well as steepening of slopes. Annual rainfall on the coastal lowland at Wollongong is 1100- 1200mm but near the escarpment crest is reaches about 16oomm. For the standard period the rainfall gradient from the coast to Mt. Keira was 72mm/km. In the wettest year on record, 1950, this gradient increased to 96mm/km, with 2250mm falling on the coastal lowland and over 3000mm on the Escarpment. What is more, the lower temperatures towards the crest reduce evaporation thereby making more water available for runnoff and infiltration into the soil. An estimated 55% of the rainfall on the higher slopes becomes available for runoff and infiltration, whereas on average only 15% is available on the lowlands.


3000mm is a pretty decent fall, equivalent to a northern QLD coast average.

From this paper: http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1001&context=wollgeo


The last few decades have been rather dry in my opinion. Back in the 1970's and 1980's land slippage around Austimer, Bulli and further north was always in the news, with at east one tragic consequence.
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#1433711 - 12/09/2017 09:43 Re: NSW/ACT day to day weather [Re: kizz]
CoastalStorm22 Offline
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Registered: 10/07/2006
Posts: 2884
Loc: Lane Cove, Sydney, NSW
Originally Posted By: kizz
The NW wind was blowing through my place in fits and bursts this morning. Being at 150m I seem to be one of the first places to get these gorgeous nor-westers as they mix down. So it is there and just above our heads.

And this wretched lee wave cloud. I'm not surprised but still annoyed it is here. It seems to prevent the sun from helping the gradient wind mix down. Kind of as if the strong winds just above our heads are keeping any ground inversions in place.


Similar situation here also Kizz, although you're much warmer than me, but my station sits a bit lower at bang on 100m.
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#1433712 - 12/09/2017 09:51 Re: NSW/ACT day to day weather [Re: Grant]
Wave Rider Offline
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Registered: 27/01/2014
Posts: 7050
We have the NWer (westerly) here as well, temp about 23C and rising. The wind has quite strong earlier at about 8am.

Kino, I think it still will get to the forecasted top of 27 or at least 25 anyway. With sunny day there would've been potential for about 30 or 31 degrees.
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#1433717 - 12/09/2017 10:17 Re: NSW/ACT day to day weather [Re: Grant]
Wave Rider Offline
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Registered: 27/01/2014
Posts: 7050
21 degrees at Goulburn and 14 at Camden. Pretty impressive temp difference, it should be the other way around.
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#1433725 - 12/09/2017 11:03 Re: NSW/ACT day to day weather [Re: Grant]
DaveM Offline
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Registered: 21/05/2001
Posts: 10147
Loc: Bathurst NSW about 700 m asl
Overnight low here was 1 but already just over 20.

Orange just over 18, Cowra about 22

Very thin scattered high cloud.

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#1433729 - 12/09/2017 11:54 Re: NSW/ACT day to day weather [Re: Grant]
rain gauge Offline
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Registered: 16/02/2006
Posts: 4536
Loc: Gorokan NSW 4klm West of the ...
28.1 here in Gorokan. And I've only recorded 31mm of rain in nearly 12 weeks.
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Nov Rain. 110.1mm
YTD-1036.9 mm
2017 rainfall-1172.1mm





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#1433738 - 12/09/2017 12:23 Re: NSW/ACT day to day weather [Re: Grant]
Kino Offline
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Registered: 10/08/2017
Posts: 2830
Loc: Wollongong, NSW, Aus
Well we've got to 25 here, still under cloud cover.

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#1433739 - 12/09/2017 12:51 Re: NSW/ACT day to day weather [Re: Grant]
Kino Offline
Weatherzone Addict

Registered: 10/08/2017
Posts: 2830
Loc: Wollongong, NSW, Aus
26! yay smile

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#1433741 - 12/09/2017 13:04 Re: NSW/ACT day to day weather [Re: Grant]
EddyG Offline
Meteorological Motor Mouth

Registered: 19/12/2008
Posts: 5126
Loc: Port Stephens NSW
Stunning day here, no wind whatsoever, just a bit of scattered high cloud about and 27c.

I spent the morning in the Myall Lakes National Park, absolutely beautiful up there, was a bit of smoke about which really p*s**d me off no end!!
_________________________
Rainfall
MTD - 44.4mm
YTD - 875.9mm
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#1433743 - 12/09/2017 13:51 Re: NSW/ACT day to day weather [Re: Grant]
EddyG Offline
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Registered: 19/12/2008
Posts: 5126
Loc: Port Stephens NSW
Like I said, no wind.
IMG_5945 by Eddy Groot, on Flickr

Broadwater, Myall lakes
_________________________
Rainfall
MTD - 44.4mm
YTD - 875.9mm
https://www.instagram.com/eddygroot/

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#1433746 - 12/09/2017 14:21 Re: NSW/ACT day to day weather [Re: CoastalStorm22]
kizz Offline
Weatherzone Addict

Registered: 11/02/2002
Posts: 2059
Loc: Beacon Hill, Sydney 152m asl
Originally Posted By: CoastalStorm22
Similar situation here also Kizz, although you're much warmer than me, but my station sits a bit lower at bang on 100m.


You're catching up to me now temp-wise.

On a side note, how long have you had your station? I'm looking at your wind meteogram and comparing it to mine thinking that my anemometer bearings have seen better days.

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#1433749 - 12/09/2017 14:31 Re: NSW/ACT day to day weather [Re: Grant]
Kino Offline
Weatherzone Addict

Registered: 10/08/2017
Posts: 2830
Loc: Wollongong, NSW, Aus
NE'erly seabreeze in; temps dropped 3-4c in half hour and DP's jump. That's it today for the heat I'd say, see what tomorrow brings.

EC & GFS like the chance of an overnight shower/storm late Wednesday with a second band of showers/light rain Thursday PM. Not much in way of mm's tho (and btw why is rain measured in 'distance' and not volume i.e. mL? always wondered why????)

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