The Wacky World of Weather Stations: No. 92- Logan City (Qld)

Please refer back to my first post for site specifications.  I have also found “Meteorological Observations and Reports Instrument Siting Requirements” published in 2018, which reinforces these specifications and adds some detail which I may have overlooked, such as:

At airports, the minimum distance from the instrument enclosure is:

Turing areas and aprons   80m
Runways   60m
Taxiways   30m.

Also, the site plan should show “surrounding features out to about 60 metres”, true north should be clearly identified, and “significant features which may affect the microclimate even though the site remains within specification; (eg. ‘Dirt car park 50 m NE asphalted, March 2010’.)”

I need to go back to check many stations I had originally passed as compliant!

Station: Logan City Water Treatment Plant 40854

Opened: 1992

Daily Temperature data from: 1992

Data used to adjust Acorn sites at: Gayndah, Cape Moreton, Amberley.

Location:   Co-ordinates   -27.6839 153.1947

Logan map

About 28km south-east of Brisbane CBD.

BOM site plan 2019:

Logan plan2019

2019 Google satellite image:

Logan aerial

Wider view:

Logan wider

Interestingly, the site plan shows the site oriented to Magnetic North, not True North, so presumably the screen is not facing True North either, which immediately makes this station non-compliant.  Apart from that, the site has short grass cover and is open, on a small slope.  However, it is 30 metres from a 25 metre water tower when it should be 100 metres away (four times the height), 15 metres from a 12 metre tree, when it should be 48 metres.   Also, it has a large industrial and commercial area with acres of bitumen and steel roofing to the north and west and the water treatment plant to the south and east.  This is likely to affect temperatures.

This station is non-compliant, with temperatures reported at Latest Weather Observations and used to adjust data at Acorn sites.

FAIL

Percentage of all sites not compliant: 12.71%

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3 Responses to “The Wacky World of Weather Stations: No. 92- Logan City (Qld)”

  1. Bill in Oz Says:

    1 : Those new guidelines are interesting. BOM knows that site should not be impacted by urban heat island effects etc. But continues to locate them in such places anyway… Ummmm ?

    2: This Logan BOM weather site is quite close to a sewerage treatment farm..Presumably the one which treats the effluent for the City of Logan

    3: The M1 – Pacific Motorway is about 300 meters away. But what a huge cloverleaf interchange there is just close by to the BOM station..

    Any temperatures measured here will be massively effected by these un natural features of the local surroundings.

  2. The Wacky World of Weather Stations: No. 288- Yamba (NSW) | kenskingdom Says:

    […] 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 […]

  3. The Wacky World of Weather Stations: No. 327- Lake Grace (WA) | kenskingdom Says:

    […] 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 […]

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