The Wacky World of Weather Stations: No. 191- Pemberton (WA)

Thursday 31/10/2019

Please refer back to my first post for site specifications and to No. 92- Logan City for 2018 specifications.  If you wish to check on this (or any) site for yourself, go to my post on how to check for yourself.

Station: Pemberton 9592

Opened: 1941

Daily Temperature data from: 1957

Data used to adjust Acorn sites at: Albany, Bridgetown, Cape Leeuwin.

Location:   Co-ordinates   -34.4478 116.0433

280km south of Perth.

BOM site plan 2015:

Google satellite image 2019:

I first thought this station was just marginal, hardly worth worrying about. However, it is a good example of how sites change over the years, and how building development creeps up on what could otherwise be fairly well sited stations. This can be shown by looking at old site plans.

BOM site plan 1997:

There was an old screen close to the Telecom mast and shed, and a screen too close to some trees. The only other building mentioned was the Parks and Wildlife Office.

BOM site plan 1999:

By 1999 a tank had been installed, the site was still fairly open except the screen was too close to tall trees 25 metres away. Over the years site plans reveal the removal of trees and the construction of new buildings (with dates shown in the Google satellite image below:

The screen is 10 metres from the shed first identified in 2009; 12 metres from the ‘2001’ building; and less than 15 metres from the ‘2008’ building, and still very tall trees are 25 to 30 metres away.

This station is non-compliant, with temperatures reported at Latest Weather Observations and used to adjust data at Acorn sites (although all adjustments were before 1997).


Percentage of all Australian sites not compliant: 26.38%.

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One Response to “The Wacky World of Weather Stations: No. 191- Pemberton (WA)”

  1. Bill In Oz Says:

    Ummmmm ? Clearly not compliant now with BOM’s guidelines.

    The screen is now sheltered from winds on three sides. And each of those buildings not doubt have it’s own heating and cooling systems to keep office workers comfortable.

    And hot or cool air will leak from the buildings as well.

    So all in all there is a lot of urban Heat Island effect happening at this site.

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