"Cyclone" Victoria Feb 2005, summary

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MurrayWx
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"Cyclone" Victoria Feb 2005, summary

#1 Postby MurrayWx » Thu Sep 22, 2005 10:34 pm

for reference and review (and criticism and comment)

Please note, this is taken from my perspective 300km north of Melbourne, Australia.

In early February, what the media termed "cyclone victoria" swept across south-east Australia:

Image
Satellite Image of the severe weather event in february, 2005. [Bureau of Meteorology]

A bit of local analysis from the "screaming eagle" "Cyclone Victoria" as pictured in an earlier post in this thread:

Things to note:

1) there was a sharp temperature drop from 38C on the 1st of February to 13.8C - graphically it does not show that this temperature drop occurred in less than 30 minutes in the evening of the 1st. About this time, the wind picked up, sustained at only 30km/h but with gusts over 120km/h occuring frequently.

2) Much of the precipitation was in the form of hail, in other areas it snowed. Widespread flooding was recorded - the river near here did flood but thankfully not too far. The rain occurred 12 hours after the temperature drop.

3) most of the damage occurred late on the 2nd and into the 3rd of February, when wind gusts of up to 144km/h was recorded in Cobram (3km from here).

4) no thunder and lightning was recorded in the district.

5) tornadoes were recorded 15km south and 22km north-east.

6) from this severe weather event to the 8 June, the area experienced only 4 days of significant rainfall. Of which only approximately 25% of the average rainfall fell.
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Aslkahuna
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#2 Postby Aslkahuna » Fri Sep 23, 2005 4:43 am

Nice off season extratropical Low. Classic cold air comma with low level CAA from the S behind it as shown by the inversion dominated SC.

Steve
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#3 Postby MurrayWx » Fri Sep 23, 2005 5:18 am

G'day Steve, I am still learning, but I think I know what you mean, and you are spot on.

Here is the Mean Sea Level Pressure analysis for 0000UTC (11am EDST) on 3rd February (from the Bureau's website)

Image
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#4 Postby Aslkahuna » Sat Sep 24, 2005 4:13 pm

One would need to look at the upper air and the history of the system to see if it was the extratropical remnat of a Cyclone as I have seen those travel from NW Australia across the Continent to emerge on the South Coast as an ET Low. Without the H5 map, the pattern looks like a closed ULL lifting out ahead of the larger system to the south.

Steve
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