Page 3 of 3 < 1 2 3
Topic Options
#1475460 - 07/11/2018 10:28 Re: Vic - cold front to expected to provide good rain 5-7/11/18 [Re: Petros]
HigherPerspectiv Offline
Cloud Gazer

Registered: 07/11/2015
Posts: 30
Chased around northern Vic yesterday.

Initially started up near Nathalia (around 15:00), watching cells develop the the W and NW, along the trough line (that was very visible on satellite).

There were already some good storms moving off to the SE along the same line, but most were fairly low topped, but were showing signs of good shear interaction and good convection. Upper level winds were strong and dragging the anvil a long way down wind. This was also limiting updraft height.



The cell the approached Nathalia began to show a fibrous anvil and seemed to be weakening, so we decided to head south to intercept cells now rapidly building along the trough line south of Echuca. Good convection was going and a flanking line formed, feeding into a rapidly intensifying cell near Kyabram.

This cell began to show two separate updraft regions (around 16:00), and then split into a left and right mover. We caught up with these cells just NW of Shepparton, with both cells showing wall clouds, and the left mover showing some small funnels.



The right mover looked stronger on radar, so we decided go south to follow that. Within 15-20 minutes we realised we should have stayed with the left mover, which was now showing interesting doppler returns, and some hook patterns on rain radar.

We turned east to follow it but it had already passed our position and we struggled to catch up to it. Convection was going nuts and huge pulses were boiling over into a large domed overshooting top.



Around this time doppler was showing a velocity couplet that persisted for 30 minutes or so, with one very intense frame at 16:49 just east of Dookie. I believe there may have been a weak tornado at this point.



We couldn't see anything on the ground, as we were on the SW side of the inflow region. Hail shafts and heavy rain were visible and obscuring the view, and there were definite lowerings, but couldn't confirm anything.



After Dookie, the cell seemed to slow its pace and weaken slightly, and we were able to get back on the northern side of it.



We watched it from Mount Major as it moved towards Wangaratta and began back building again, with more large overshooting pulses. Radar suggests perhaps another weak tornado east of Wangaratta, but nothing visible from our position. A large flanking line was feeding into the main storm.



As the storm began to encounter terrain, more large towers formed along the flanking line, with some very large pulses that merged into the main cell, with huge domed overshoots. Doppler shows further tornado potential about this time.



We watched this cell slow right down and seem almost stationary (it really wasn't) for around an hour as it slowly tracked NE. The anvil was huge and stretched to the SE over 100km away from the updraft region. Some of the updraft pulses at this point were overshooting 20% or so of the height of the storm above the rest of the anvil.



The right mover we'd followed earlier was still going and was now near Mt Buller. It still had a large anvil, but had weakened significantly by this stage.



Interestingly, the cell we'd initially been watching at Nathalia did weaken, but then reintensified near Tocumwal and tracked east for quite a distance (well east of Holbrook).




Overall a great chase day (apart from our rookie mistake chasing the right mover). Heaps of amazing timelapse footage to process!



Radar data here:

Rain Radar

Doppler


Edited by HigherPerspectiv (07/11/2018 10:29)

Top
#1475467 - 07/11/2018 12:47 Re: Vic - cold front to expected to provide good rain 5-7/11/18 [Re: Petros]
chasers addict Offline
Weatherzone Addict

Registered: 11/12/2007
Posts: 2652
Loc: Bendigo/ Kangaroo Flat, Vic Ra...
The Northern Country not much rain so I only had 14mm for November.

Top
#1475480 - 07/11/2018 14:48 Re: Vic - cold front to expected to provide good rain 5-7/11/18 [Re: HigherPerspectiv]
balmz Offline
Weather Freak

Registered: 18/11/2012
Posts: 741
Loc: Ferntree Gully, Melbourne, VIC
Originally Posted By: HigherPerspectiv
Chased around northern Vic yesterday.

Initially started up near Nathalia (around 15:00), watching cells develop the the W and NW, along the trough line (that was very visible on satellite).

Overall a great chase day (apart from our rookie mistake chasing the right mover). Heaps of amazing timelapse footage to process!

Radar data here:

Rain Radar

Doppler


Great detailed summary, thank you!

Top
#1475494 - 07/11/2018 16:05 Re: Vic - cold front to expected to provide good rain 5-7/11/18 [Re: Petros]
Spectreman Offline
Cloud Gazer

Registered: 15/09/2018
Posts: 3
Loc: Melbourne
Got a whopping 40mm of rain in Box Hill yesterday, most amount of rain here for some time.
The local flood retarding basin that doubles as an oval was fully flooded, huge amount of water flowing into it yesterday.
I managed to get some good audio recordings of thunder, first time in many months, was great !

Top
#1475499 - 07/11/2018 17:18 Re: Vic - cold front to expected to provide good rain 5-7/11/18 [Re: Petros]
chasers addict Offline
Weatherzone Addict

Registered: 11/12/2007
Posts: 2652
Loc: Bendigo/ Kangaroo Flat, Vic Ra...
isolated showers and cold of 12.7c.

NSW Lucky lots rain.

Top
#1475513 - 07/11/2018 20:00 Re: Vic - cold front to expected to provide good rain 5-7/11/18 [Re: Petros]
balmz Offline
Weather Freak

Registered: 18/11/2012
Posts: 741
Loc: Ferntree Gully, Melbourne, VIC
Nice little cold Thunderstorm moving through the Eastern suburbs. smile

Ironically seeing more bolts now with this than through yesterdays downpour!!! (I saw none.. lol)

Top
#1475520 - 07/11/2018 21:18 Re: Vic - cold front to expected to provide good rain 5-7/11/18 [Re: Petros]
balmz Offline
Weather Freak

Registered: 18/11/2012
Posts: 741
Loc: Ferntree Gully, Melbourne, VIC
So that little storm formed a bit of a cold convergence line and dumped a fair amount of small hail! My friend in Chadstone just posted this!

Top
#1475540 - 08/11/2018 07:22 Re: Vic - cold front to expected to provide good rain 5-7/11/18 [Re: Petros]
Alexia Offline
Weather Freak

Registered: 14/12/2002
Posts: 597
Loc: Corryong
This system we have had 44mm rain just amazing it is hard to tell you how good it is here we are just a sea of grass everyone is flat out trying to get silage made and just starting on hay.


Edited by Alexia (08/11/2018 07:23)

Top
#1475543 - 08/11/2018 08:45 Re: Vic - cold front to expected to provide good rain 5-7/11/18 [Re: Petros]
samboz Offline
Weatherzone Addict

Registered: 16/11/2014
Posts: 2099
Loc: Sale, Central Gippsland, S/E V...
Excellent Alexia, takes a lot of pressure off. grin

Top
#1475672 - 10/11/2018 11:46 Re: Vic - cold front to expected to provide good rain 5-7/11/18 [Re: Petros]
stormygirl Offline
Weather Babe and Moderator

Registered: 21/12/2004
Posts: 4045
Loc: Melbourne, SE Burbs
Great pic from your friend in Chadstone, balmz! My street looked exactly the same smile

Prior to this event, my YTD rainfall hadn't reached 300mm, and I needed 150mm both in November and December to reach my average. I received 52.2mm for the week, which is exceptional, but I doubt I will still reach my average.

It's shaping up to be one of (if not) the lowest rainfall since I began taking records in 2006 frown
_________________________
New online weather station up and running: http://www.stormygirl.net/wx/index.html




Top
Page 3 of 3 < 1 2 3


Who's Online
0 registered (), 44 Guests and 3 Spiders online.
Key: Admin, Global Mod, Mod
Today's Birthdays
Chris #3, Cloudwatcher, dave-tsv, GuyH, Joshg, Prettybub, s016230, Sprouts
Forum Stats
29700 Members
32 Forums
24005 Topics
1502889 Posts

Max Online: 2925 @ 02/02/2011 22:23
Satellite Image