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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: 2103
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: 336
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: 17490
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: 1109
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: 14848
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 - Yesterday at 02:47 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Pooley72 Offline
Cloud Gazer

Registered: 17/01/2017
Posts: 34
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 - Yesterday at 11:57 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Galaxyman Offline
Weather Freak

Registered: 30/01/2016
Posts: 199
Loc: Renmark
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 - Yesterday at 16:43 Re: South Australian and Adelaide day to day forecasting [Re: Pooley72]
StormCapture Offline
Weatherzone Addict

Registered: 19/12/2013
Posts: 1642
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 - Today at 00:48 Re: South Australian and Adelaide day to day forecasting [Re: StormCapture]
Pooley72 Offline
Cloud Gazer

Registered: 17/01/2017
Posts: 34
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 (Today at 00:55)
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My PWS: www.wunderground.com/personal-weather-station/dashboard?ID=INOARLUN2

Jan: 52.2mm
Feb: 32.8mm
Mar: 28.2mm
Apr: 39.6mm
May: 37.8mm
Jun: 14.4mm
Jul: 107.9mm
Aug: 74.4mm
Sep: 50.8mm
Oct:
Nov:
Dec:
2017: 422.7mm

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#1434646 - Today at 08:42 Re: South Australian and Adelaide day to day forecasting [Re: Pooley72]
betsuin Offline
Weather Freak

Registered: 07/04/2010
Posts: 552
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 - Today at 13:57 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
Thunderstruck Offline
Lightning man

Registered: 10/05/2001
Posts: 14848
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 - Today at 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 - Today at 15:45 Re: South Australian and Adelaide day to day forecasting [Re: Thunderstruck]
teckert Offline
Weatherzone Moderator

Registered: 27/05/2001
Posts: 17490
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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