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#1433897 - 13/09/2017 14:52 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Markus Offline
Weatherzone Moderator

Registered: 02/12/2010
Posts: 2124
Loc: Clare, SA
Had an absolute belter of a hail shower earlier in Clare. Dropped the temp to 5.5, a brief white covering of hail and a solitary rumble of thunder, awesome!
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#1433904 - 13/09/2017 15:09 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
berga1987 Offline
Weather Freak

Registered: 04/08/2010
Posts: 337
Loc: Malvern, Adelaide, Aus
That is getting tantalisingly close to snow temperatures.
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#1434390 - 19/09/2017 17:04 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
teckert Offline
Weatherzone Moderator

Registered: 27/05/2001
Posts: 17521
Loc: NE suburbs, Adelaide, South Au...
Good chance a pretty decent nocturnal light show late on Friday night into saturday morning....

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#1434407 - 19/09/2017 19:50 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Skysthelimit Offline
Weatherzone Addict

Registered: 08/11/2008
Posts: 1124
Loc: Gladstone Sth Aust
Sure hope you're right Teck. After the Crows demolish the Cats would be nice! smile

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#1434439 - 20/09/2017 09:03 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Thunderstruck Offline
Lightning man

Registered: 10/05/2001
Posts: 14865
Loc: Seaford Meadows, SA
Yer been lookin quite thundery for a few days now, starting late arvo and early evening, most unstable air is just after the game finishes as well....these upper dynamic driven events have a habit of moving in quickly so be very frustrating if it's going off around the traps during the game.

TS cool

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#1434538 - 21/09/2017 02:47 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Pooley72 Offline
Cloud Gazer

Registered: 17/01/2017
Posts: 36
Loc: Seacliff Park
Ripper dew point at the moment. 2:15am with 10% humidity and the DP is -13.7 (Was -15 at 0145). That is pretty low in my book. BOM is saying 18.9 with 17% for a DP of -6.2 at the airport.
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#1434562 - 21/09/2017 11:57 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Meh Offline
Weather Freak

Registered: 30/01/2016
Posts: 209
11:00am

Adelaide: 17.5C
Renmark: 28.0C

Adelaide failing at life big time lmao that is just hilarious to the nth degree LOL

WHat's the likely hood of storms in this area on Friday night? Do I need to stock up on beer?

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#1434599 - 21/09/2017 16:43 Re: South Australian and Adelaide day to day forecasting [Re: Pooley72]
StormCapture Offline
Weatherzone Addict

Registered: 19/12/2013
Posts: 1644
Loc: Uleybury
Originally Posted By: Pooley72
Ripper dew point at the moment. 2:15am with 10% humidity and the DP is -13.7 (Was -15 at 0145). That is pretty low in my book. BOM is saying 18.9 with 17% for a DP of -6.2 at the airport.


It is very interesting actually giving yours is a Fine-Offset regardless if it is a Holman or whatnot, yet the WX Station just up the road from you (say 200m) reads a low DP of -2 to -3
Your Humidity sensor must be out by a significant amount giving it was stuck on 10% as that's how low they go, and to be at night adds more question on it as I'd expect a bizarre reading on the unit if it was in the middle of the day but for night, yeah I'd say your RH sensor within the outdoor unit is out. No way was the air that dry.

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#1434632 - 22/09/2017 00:48 Re: South Australian and Adelaide day to day forecasting [Re: StormCapture]
Pooley72 Offline
Cloud Gazer

Registered: 17/01/2017
Posts: 36
Loc: Seacliff Park
Originally Posted By: StormCapture


It is very interesting actually giving yours is a Fine-Offset regardless if it is a Holman or whatnot, yet the WX Station just up the road from you (say 200m) reads a low DP of -2 to -3
<>
, yeah I'd say your RH sensor within the outdoor unit is out. No way was the air that dry.


Yeah, humidity sensor is one of those things that is really really hard to calibrate accurately. I have manually calibrated mine to be somewhere between the BOM Adelaide Airport and Noarlunga observations. Tonight, it's reading 75% humidity, DP of 7.5 degrees at a temperature of 11.8. Airport says 89%, DP 8.5 at a temp of 10.3. Noarlunga has 74%, DP 7.2 and temp is 11.7. Trouble is that I can only calibrate in a linear way so it may be more accurate at higher humidity, or conversely it may be more accurate at lower. I have to strike a balance and try for the middle ground bearing in mind that I am aware that the unit the unit I have is a basic "prosumer" level device smile

Oh edited to add: not sure why but my observed humidity did go as low as 8% at one stage. Without looking at the number I would assume that this was when the DP was measured at its lowest.

Oh and the nearby stations are a little flakey (IMHO), the one that is about 500m to my East has a tendency to disappear from Wunderground (due to failing WU's QA process I assume) and the one that is about 700m to my north is further on the plains than I am. Possibility that this may account for differences in some of the readings maybe?


Edited by Pooley72 (22/09/2017 00:55)
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Jan: 52.2mm
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Apr: 39.6mm
May: 37.8mm
Jun: 14.4mm
Jul: 107.9mm
Aug: 74.4mm
Sep: 54.9mm
Oct: 24.9mm
Nov: 5.4mm
Dec:
2017: 472.5mm

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#1434646 - 22/09/2017 08:42 Re: South Australian and Adelaide day to day forecasting [Re: Pooley72]
betsuin Offline
Weather Freak

Registered: 07/04/2010
Posts: 579
Loc: Magill, Adelaide
Originally Posted By: Pooley72
Yeah, humidity sensor is one of those things that is really really hard to calibrate accurately.


I have a SHT15 sitting in a room at the top of my stairs:
Temperature = 12.74 C, Humidity = 69.84 %, Dewpoint = 7.37 C

58% at West Tce according to BOM at the moment. The SHT15 allegedly is calibrated at the factory and offset values written into each individual MEMS sensor. The library used to read the thing reads those values and applies them to the raw data - it is supposed to be accurate - YMMV!

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#1434705 - 22/09/2017 13:57 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Thunderstruck Offline
Lightning man

Registered: 10/05/2001
Posts: 14865
Loc: Seaford Meadows, SA
Storm chances to tonight have eased a fair bit but it's still there. Isolated, very high based and random type cells but very dry generally

TS cool

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#1434735 - 22/09/2017 15:28 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
wrxflame Offline
Weather Freak

Registered: 18/06/2007
Posts: 86
Loc: Torrensville SA
Thanks for the update TS I was wondering if it had vanished. Camera gear check and batteries charged just in case...

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#1434752 - 22/09/2017 15:45 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
teckert Offline
Weatherzone Moderator

Registered: 27/05/2001
Posts: 17521
Loc: NE suburbs, Adelaide, South Au...
Going by GFS I'd say our chances were between about 9pm and midnight. Going by EC I'd say more likely 3am-6am.

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#1434801 - 23/09/2017 00:25 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Meh Offline
Weather Freak

Registered: 30/01/2016
Posts: 209
1st fizzer of the season to add to the ever growing list. The closest thing to a "lightshow" is my flickering TV screen.

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#1434803 - 23/09/2017 00:52 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
teckert Offline
Weatherzone Moderator

Registered: 27/05/2001
Posts: 17521
Loc: NE suburbs, Adelaide, South Au...
sigh.... it was a marginal system at best. ANy storms would be a bonus.
secondly, its not over - models had prob best chances IMO after midnight.
thirdly, there was pretty much never any chance of the Riverland seeing any.

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#1434866 - 23/09/2017 14:03 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Markus Offline
Weatherzone Moderator

Registered: 02/12/2010
Posts: 2124
Loc: Clare, SA
Hope we get something soon or it's yet another disappointing month. This coming week lacks focus and then I see some strong ridging is working its way in at the end of runs. Maybe we'll get something from onshores before that happens.

Was reading the other day as a whole Australia's winter crop yield is down 60% already, only southern SA and Vic doing alright.
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#1434911 - 23/09/2017 21:24 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Stargate Offline
Weather Freak

Registered: 30/09/2003
Posts: 725
Loc: Daveron Park, Northern Suburb...
Galaxyman buy yourself a wobble board and use it whilst watching your TV screen smile

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#1434938 - 24/09/2017 01:03 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Markus Offline
Weatherzone Moderator

Registered: 02/12/2010
Posts: 2124
Loc: Clare, SA
Could easily see the lightning flashes from those cells between YP and KI tonight near Burra. Quite amazing really, these nights with perfectly clear skies but random flashes on the horizon are so cool.
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#1435204 - 27/09/2017 00:00 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
betsuin Offline
Weather Freak

Registered: 07/04/2010
Posts: 579
Loc: Magill, Adelaide
Well that cold southerly has been trying to push up all day .. didn't really feel warm til mid-arvo?



And if that some actual rain just down south!


Edited by betsuin (27/09/2017 00:01)

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#1435507 - 29/09/2017 20:46 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Seira Offline
Meteorological Motor Mouth

Registered: 27/08/2003
Posts: 7155
Loc: Adelaide Hills.
I think there is a major rainfall event starting/underway west of Marla in the state's far NW corner. Probably the reason it's not getting some coverage (if any) is because of the minimal population density, rain gauges (and radar coverage) out that way. So letting those who are not aware of it know now smile .


Edited by Seira (29/09/2017 20:48)

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