The Wacky World of Weather Stations: No. 67- Warra (Tas)

BillinOz has prompted me to go back and check this site in Tasmania which I had overlooked.  Tony Heller noticed some strange temperatures here.

Please refer back to my first post for site specifications.

Station: Warra 97024

Opened: 2004

Daily Temperature data from: 2004

Data used to adjust Acorn sites at:  —

Location: Co-ordinates   -43.0609 146.7040

Warra map

About 50km south-west of Hobart.

BOM site plan 2016:

Warra plan 2016

2019 Google satellite image:

Warra aerial

(The screen is in the small red circle.)

A wider view:

Warra wider

Warra is in an area of forest that has been clear-felled for timber.  There are bare patches of ground, stumps and logs, and areas of rapidly growing regrowth.  The area surrounding this station is always changing, and the high temperatures Tony Heller found may possibly have been due to burning off.  The BOM plans from 2004, 2011, and 2014 show how the eucalypt saplings have grown (and compare with the 2016 heights of 3-4 metres):

Warra plan 2004

Warra plan 2011

Warra plan 2014

From 1-2m to 4-7m in 10 years.  Gum tree saplings love a clearing caused by cutting or fire.  Apart from the gravel road right beside the screen, the site has been changing over the past 15 years, and in any case saplings “<3m” inside the 20 metre rings are hardly vegetation trimmed to a few centimetres.

This station is not compliant, with temperatures reported at Latest Weather Observations but not used to adjust data at Acorn sites.


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One Response to “The Wacky World of Weather Stations: No. 67- Warra (Tas)”

  1. Bill in Oz Says:

    Ken since last week I have been looking at this link re Warra Weather station :

    I do not know what to make of it or it’s significance.
    It seems that BOM placed it’s weather station at Warra at the request of the folks organising this research to assist their purposes.. So presumably it is not a ‘normal’ BOM weather station.

    But then the question is : Is BOM using the temperature and rain fall data collected from Warra for other purposes like homogenising the records of other stations etc. ?

    Rapid growth of tees is always accompanied by an increase in water vapour from those trees in the air. And that should affect the temperatures recorded by any thermometer.

    Also rapid growth of trees will also create a rain shadow and affect the rainfall recorded in the rain gauge.

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