Michael
Thompson's Australian Storm Chase Diary
20th January 1998 - South
West outskirts of Sydney.
COPYRIGHT: All photos
on this and my other pages are copyright . However use for any non-profit
purposes can be had in most instances by simply E Mailing first.
A rather frustrating summer in the Illawarra with
several days where storms developed north of the area, but leaving the
Illawarra untouched. Early afternoon on the 20th January saw some very
promising looking thunderstorms develop around the Illawarra. The first
photo is a view from the back door at work at around 3pm. ( I must at this stage apologise for the quality of the
photos, I am a little worried that the film could have been affected
by heat and humidity as every shot looks a little washed out ). Surprising this promising looking storm did not
amount to much and passed quickly. By 5pm when I finished work, activity
in the southern Illawarra had quietened. On my bicycle ride home I noticed
a large multicell structure to the north. As I watched a gust front
slowly came into view from over the escarpment. This gust front was
moving in a definite SE direction, whilst the actual storms was drifting
NE. I have always like gust fronts that move away at angles from the
downdraft, rather than straight out ahead of the storm. I may be wrong,
but tend to find that these storms more potentially severe. I targeted
the Picton area for a chase. My aim was to get to the NW side of the
storm. I ran into very heavy rain at Mt Keira, almost to flash flooding
stage, the rain cleared rather suddenly at the top of the Mt Keira pass
and I could see the best action was still towards north west, the storm
was moving very quickly. At Mt Razorback near Picton about 6.30pm I
decided to still move NW, to try to avoid the obvious heavy rain to
the N and NE, not to mention urban areas of Sydney's south west suburbs
which would be a mistake. Unfortunately this system moved rather quicker
than I anticipated and I was never able to catch it, let alone get to
the rear or north west side of the storm. I noticed some small limbs
down at Luddenham, and the emergency crew, which I later found out was
because a house had lost its roof. I gave up the chase north of Luddenham
at Elizabeth drive and headed to Liverpool. There was another narrow
damage path along Elizabeth drive, tree branches down.
The photos below show the
storm to the north and north west at around 7.45pm, it
was less than 30 minutes off sunset and I had no hope
catching the system before dark. Although lots a low
cloud made for poor photos you can clearly see the slope
of the large rear anvil and updraft.
 
  
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