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#1462897 - 01/05/2018 11:20 SA - Cold Front with Showers, Poss Storm May 3-4 2018
StormCapture Offline
Weatherzone Addict

Registered: 19/12/2013
Posts: 1681
Loc: Uleybury
Next burst of wet weather to make it's way across the southern parts of the state early Thursday morning.

Warm northerly winds will filter ahead of the front before they will turn a Northwesterly later Wednesday before a westerly as the front moves through and remaining a west to southwesterly behind it.

There is a chance of a few rumbles as it moves through in the early hours Thursday.

Rainfall has been upped to 25-50mm on the BoM Rainfall map while others are hinting at least 20mm for the Adelaide area with heavier falls in the Hills of up to 60mm, isolated falls of 70mm possible.

Unfortunately not many areas that do need a good drink won't get as much as they need but should get something.

15 to 25mm on the LEP and southern parts of the EEP, reducing to 5-15mm the further north you go and reducing down further north.

Yorke Peninsula, Adelaide Area and KI 15 to 25mm with pockets of 25-50mm possible.

Riverland <5mm


Certainly will be welcomed but will need a very wet winter to get us back to average.

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#1462963 - 02/05/2018 16:27 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Pooraka Offline
Weather Freak

Registered: 24/02/2006
Posts: 144
Loc: Pooraka, Adelaide, South Austr...
Some scattered showers starting to appear out west on radar. How do you all think its shaping up? Would be great to get some rain, just put some compost down in the garden today :-)

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#1462964 - 02/05/2018 16:49 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
teckert Offline
Weatherzone Moderator

Registered: 27/05/2001
Posts: 17590
Loc: NE suburbs, Adelaide, South Au...
Australian Government Bureau of Meteorology
South Australia
TOP PRIORITY FOR IMMEDIATE BROADCAST

Severe Weather Warning
for DAMAGING WINDS and HEAVY RAINFALL

For people in Adelaide Metropolitan, Mount Lofty Ranges, Lower Eyre Peninsula, Eastern Eyre Peninsula, Yorke Peninsula, Mid North, Kangaroo Island, Murraylands, Upper South East, Lower South East and parts of West Coast and Riverland districts.

Issued at 4:06 pm Wednesday, 2 May 2018.
Weather Situation: A trough of low pressure currently in the west of the State will reach central districts, including Adelaide, early Thursday morning before moving across remaining central and eastern districts during Thursday.
A developing band of rain and thunderstorms associated with the trough is forecast to produce damaging winds and locally heavy rainfall over parts of the warning area from late this evening.
Localised damaging winds, averaging 50-65 km/h with gusts of around 90 km/h, are forecast over Eyre Peninsula from late this evening, before extending east. Damaging winds are most likely to be associated with the rain or thunderstorms.
Thunderstorms within the band may also produce locally heavy rainfall in some areas, leading to flash flooding. The heavier rainfall accumulations of 40 mm or more are most likely to occur in the Mount Lofty Ranges district.
Locations which may be affected include Port Lincoln, Whyalla, Clare, Maitland, Adelaide, Kingscote, Murray Bridge, Naracoorte and Mount Gambier.

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#1462979 - 02/05/2018 21:52 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
betsuin Offline
Weather Freak

Registered: 07/04/2010
Posts: 712
Loc: Magill, Adelaide


Well that might be fun tomorrow morning .. I should try a time-lapse out my work's north facing windows.

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#1462981 - 03/05/2018 01:03 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Thunderstruck Offline
Lightning man

Registered: 10/05/2001
Posts: 14961
Loc: Seaford Meadows, SA
Nice system, definitely the most significant of the season or year to date, but I would not call it a break in the season largely due to the pattern that will follow but it may give some at least a start or mitigate the drying trend we have had through much of the last month or two.

Strong subtropical jet aloft with polar jet wrapping atop a big and strong upper trough pushing in from the west. Flow aloft accelerates as the upper trough closes in and moisture gets lifted up in a nicely divergent area aloft forming a rainband which is steadily developing as we speak. Initially, the lower levels are quite dry so there will be a fair bit of virga around which will slowly moisten the layers below until the rain sets in, but will take quite a while - around Adelaide it is already spitting but mostly evaporating, but after about 4-5am it should be a little more consistent and becoming quite substantial after about 630-7am through till about 10-11am when the back edge of the rainband should be coming through.

It is fairly unstable as far as rainbands go, but this is chiefly out west in the earlier stages, once the uppers become more and more saturated and 'warmed' with the cloudband I think the amount of isolated thunderstorms will decrease but I would not rule out a few rumbles within the band or near the rear edge of the band. Winds will be blustery at times as the precipitation mixes down to the surface.

After the rainband clears, there should be a lull but the winds will gradually pick up after swinging westerly, and the surf on the coast will get rougher, with high tide late afternoon, we should see the water levels a fair deal higher than usual, so expect coastal erosion later tomorrow and overnight into friday.

Later in the afternoon, the colder air begins to arrive so the lull in precipitation will give way to an increase in showers in the more unstable cold pool from the upper trough. The angle of this one is more W to WNW so will greatly favour southern suburbs at first before swinging more W to WSW overnight then favouring all areas into the N burbs. Ranges will dominate right throughout and showers will be heavy at times with very squally and lashing winds, and isolated cold air thunderstorms through thursday evening likely. Wouldn't even rule out some brief small hail in stronger cores.

All should ease out friday as the airstream rapidly moderates as the system moves easdtwards.

Expecting around 15-25mm in Adelaide area from the event generally, 30-70mm in the hills though, the 70mm more for the usual sweet spots near Mt Lofty and just behind.

Southern EP/YP should do the best for the farming areas 15-30mm quite possible but dropping off further north and also the rain shadow will be fairly substantial for the Mallee and Riverland areas so generally 3-8mm there, some areas even less unfortunately. LSE will do well 20-30mm or so. Mid North 8-15mm.

TS cool

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#1462992 - 03/05/2018 09:25 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Ryan Hothersall Offline
Weather Freak

Registered: 15/11/2009
Posts: 795
Loc: Gulfview Heights, South Austra...
I sort of remember this wet stuff that's currently falling from the sky.

Had 3.4 mm so far this morning here in Gulfview Heights.
_________________________
Current Gulfview Heights weather
http://ryanhothersall.net/gulfview-heights-weather/

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#1462995 - 03/05/2018 11:28 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
willitrainagain Offline
Weather Freak

Registered: 13/12/2011
Posts: 573
Loc: Mt Barker S.A.
6mm before 9am...11mm since

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#1462998 - 03/05/2018 12:29 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Bergasms Offline
Weather Freak

Registered: 04/08/2010
Posts: 358
Loc: South Plympton, Adelaide, Aus
Lovely stuff. Won't need to water the lawn for a bit now, which is welcome.
_________________________
I wish Mt Lofty was more lofty, another 2km or so would suffice.

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#1462999 - 03/05/2018 12:32 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Bergasms Offline
Weather Freak

Registered: 04/08/2010
Posts: 358
Loc: South Plympton, Adelaide, Aus
Just updated my profile... still had my age set as 23. Guess it's been about 8 years since I last checked that.
_________________________
I wish Mt Lofty was more lofty, another 2km or so would suffice.

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#1463002 - 03/05/2018 12:58 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: Bergasms]
JohnC Offline
Weather Freak

Registered: 03/02/2011
Posts: 165
Loc: Adelaide, South Australia
Originally Posted By: Bergasms
Just updated my profile... still had my age set as 23. Guess it's been about 8 years since I last checked that.


Good call. *updates mine*
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http://jcroucher.com/weather/

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#1463012 - 03/05/2018 14:25 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Bolt Offline
Weather Freak

Registered: 26/01/2005
Posts: 376
Loc: Whyalla South Australia
Nice 10mm for Whyalla all up, so far. Cant complain about that.

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#1463033 - 03/05/2018 17:40 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Pooraka Offline
Weather Freak

Registered: 24/02/2006
Posts: 144
Loc: Pooraka, Adelaide, South Austr...
17mm at Pooraka so far

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#1463044 - 03/05/2018 18:55 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Markus Offline
Weatherzone Moderator

Registered: 02/12/2010
Posts: 2205
Loc: Clare, SA
epic cold front. Rather nice shelf cloud along it wherever it organised into a heavy line, have seen some great images from as far north as Pirie.

17mm total in Clare
_________________________
My Blogging site.

http://markdawsonphoto.wordpress.com/

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#1463045 - 03/05/2018 18:59 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Weather Guru Offline
Weatherzone Addict

Registered: 13/07/2008
Posts: 1654
Loc: Munno Para , Northern Suburb o...
12.7 mm system total so far, more heavy showers tonight, possible rumble for some and even some possible hail.
With that strong squally line of showers that came through this arvo, i had just got home and literally stepped out the car from work and down she came. Even copped some hail.
No thunder or lightning as yet..... keep your ears and eyes open tonight, you might get lucky.
So yeah finally a nice drop of rain to grow the weeds and soursobs... nice and high! smile
_________________________
Adelaide forcefield monitor smile

Jan 10.2 mm
Feb 3.9 mm
Mar 6.3 mm
Apr 14.8
May 20.7
June
July
Aug
Sep
Oct
Nov
Dec
2018 55.9 mm
2017 487.2 mm
2016 571
2015 369.5
2014 460.5
2013 504
2012 417
2011 598.5
2010 553

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#1463053 - 03/05/2018 20:07 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Seira Offline
Meteorological Motor Mouth

Registered: 27/08/2003
Posts: 7579
Loc: Adelaide Hills
26.4 mm 12 midnight to 7.35 pm.

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#1463056 - 03/05/2018 20:45 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
betsuin Offline
Weather Freak

Registered: 07/04/2010
Posts: 712
Loc: Magill, Adelaide
24mm here so far.

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#1463060 - 03/05/2018 21:52 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Markus Offline
Weatherzone Moderator

Registered: 02/12/2010
Posts: 2205
Loc: Clare, SA
Clare aws copped a hell of a shower, judging by radar probs 8mm < 10 minutes. Clipped the edge here, very heavy but short lived. Up to 22mm now smile
_________________________
My Blogging site.

http://markdawsonphoto.wordpress.com/

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#1463066 - 03/05/2018 22:47 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
betsuin Offline
Weather Freak

Registered: 07/04/2010
Posts: 712
Loc: Magill, Adelaide
Nice follow up here and there:


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#1463069 - 03/05/2018 22:57 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Seira Offline
Meteorological Motor Mouth

Registered: 27/08/2003
Posts: 7579
Loc: Adelaide Hills
Have passed 30 mm [to 10.25 pm]...and yes, definitely more to come smile .

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#1463085 - 04/05/2018 08:28 Re: SA - Cold Front with Showers, Poss Storm May 3-4 2018 [Re: StormCapture]
Ryan Hothersall Offline
Weather Freak

Registered: 15/11/2009
Posts: 795
Loc: Gulfview Heights, South Austra...
Had about 19 mm here in Gulfview Heights yesterday.

My weather station did something weird yesterday afternoon, the rain gauge must have gotten stuck and next time I checked, it had recorded 904.8 mm!. Reset the daily rain total, so that's why I guess we had about 19 mm, looking at the nearest official BoM station at Parafield Airport and other weather stations nearby.

Anyone else ever have wacky readings like that?.


Edited by Ryan Hothersall (04/05/2018 08:28)
_________________________
Current Gulfview Heights weather
http://ryanhothersall.net/gulfview-heights-weather/

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