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Posted by: Colmait Offline Posted: Wednesday, 20 November 2019 4:55:04 PM(UTC)
Originally Posted by: Greg Go to Quoted Post
Originally Posted by: CantSpellNarangba Go to Quoted Post
Beeeeloody hell. The wind must have been impressive. I wonder if there were any (semi) reliable wind recordings from any personal weather stations in the area?

The pros would be able to correct me, but could this be a microburst or a down draft to cause this damage?


I wish you wouldn't have said that CSN BigGrin

I had a look through the Weatherunderground web site this afternoon https://www.wunderground.com/wundermap for any private weather stations close to where that block of units was unroofed. Using Google Earth I managed to find that block which is not far from Mooloolaba Beach. It is situated at the head of a canal off Tuckers Creek and would have been exposed to any strong gusts from the SW - W.

The nearest private weather station I could find was in Palm Drive about 1.02 kms NW of the unit block. The weather station there experienced three gusts of 133.3, 132.8 and the maximum gust of 136.5 kph all were from the NNW. I don't know a great deal about weather stations so I can't say how accurate or well sited this station is, and the timing of these gusts does not corrolate very well with the observations on here. (may be the power went out or has the clock set at a differnent time?) I am just writing what I found on the net. I managed to find a couple of others but the maximum gust at those was around 80 kph and that was about 1.55 km to the south of where the unit block was, and one up off Karawatha Drive at 88 kph when obviously the power went out and everything flatlined!

I know you have had some building experience Colin, is that a metal cliplock roof?

Greg



That is awesome Greg. Those gust could well and truly be right or even stronger due to the wind rating that the building code would have required back then. I had a look at the closest BoM reading at the airport North of Mooloolaba and it peaked at 86km/h if I remember and it missed the strongest part of the storm.

As for the roof, yes it was a clip lock roof. Sharjay also mentioned a house had become unstable not far from there and the residents had to be evacuated, so I am not sure if it was on stilts or poor tie down. That takes a lot of force to do that either way.

Cheers and great fact finding skills there Greg. Love it.
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