Ferny Grove weather

Approx. Latitude S 27� 23' 52"   Longitude E 152 � 55'  35"  Elevation 76 m

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This weather station at Ferny Grove is intended to provide regular updates of local meteorological measurements within the constraints of a suburban backyard. I hope that you find the information useful, your comments, thoughts and/or suggestions are welcome. You can send an email to

Recent station status log

Data on this website now updates every 15 minutes every day (without any guarantees) instead of previously twice each day and more regularly during weekends and notable weather

Scheduled maintenance on Saturday 9 March caused some short outages of temperature and humidity data in order to resolve the issue with aspiration of the temperature and humidity sensor radiation shield which is now resolved.

On Saturday 3 November 2018 the temperature and humidity data was off line for approximately one hour when maintenance and an upgrade was conducted.

Wind direction measurements were not available due to equipment failure at 11:00 AM on December 24 2017. This has caused the wind direction measurements to not record correctly and repeatedly record the same direction. This issue was resolved with the commissioning of a new system. However alternative wind measurements are provided on this page in a trial state as a temporary substitute but at a lower measuring frequency until 26 September 2018. The station used for these measurement is less reliable which failed on the 26 September 2018 and outages during very high humidity occurred when manual observations are not available.

On Wednesday 26 September 2018 all sensors reporting observations at this site were relocated to a different and temporary site between 8 am and 10:30 am. There were interruptions to the collected data during this relocation. This new location is less exposed than the currently installed locations which is expected to produce a moderate impact on recorded observations. As a result lower wind speed, lower rainfall, higher humidity and slightly cooler day-time temperatures are generally expected. A replacement system (Davis Vantage Pro 2) was installed on Wednesday 3 October and replaced the current system at 4:45 PM on Thursday 4 October. The data is measured much more accurately and differences are be expected from the existing observations. A comparison summary comparing the new system to the old system over the next several months will be available in the future.

Wind direction measurements were not available due to equipment failure at 11:00 AM on December 24 2017. This has caused the wind direction measurements to not record correctly and repeatedly record the same direction. This issue was resolved with the commissioning of the new system. The anemometer and cable was inspected with no obvious issues and mostly likely a fault in the internal electronics. An attempt was made to use a working anemometer in a similar but not compatible and older station of the same brand but its measurements didn't register. However alternative wind measurements were provided on this page in a trial state as a temporary substitute but at a lower measuring frequency until 26 September 2018. The station used for these measurement is less reliable which failed on the 26 September 2018 and outages during very high humidity occurred when manual observations are not available.

Temperature and humidity sensors are have been relocated on the 5 April 2018 to a nearby and similar new location at least temporarily which may have an impact on recorded observations. This will be closely monitored and siting adjustments made as necessary. Further updates will be issued if required.

Rainfall observations were incorrect on Thursday 24 August 2017 with readings too low, however rainfall since this occurred has been measured correctly (as compared with a manual rain gauge). The gauge has been checked and the issue is most likely caused by a failing component (rusting magnet) which has been gradually occurring. The gauge was tested for correct operation (by manually tipping the tipping buckets) and also testing with water with the gauge preforming correctly. It possible humid air and/ or moisture while raining was contributing to the issue. It is expected readings might not be reliable and become less reliable and more erratic as the component rusts further. This issued was resolved with the replacement of this system.

Note that observations for Tuesday 25 July 2017 the accuracy of some readings were affected at times between approximately 7am and 2pm.

Weather station information

Manual measurements have been made since April 2009 (to be available in the future). Most data presented on this site is constantly gathered by Cumulus weather station software which started recording from October 2011.

The Davis Vantage Pro 2 currently in use is professional equipment of moderate accuracy. This collects data every 2.5 second for wind speed and direction and every 10 to 15 seconds for most other parameters. The sensors measuring temperature, humidity and rainfall (the Integrated Sensor Suite) transmit this by a very reliable wireless signal to the indoor receiving console using a solar powered transmitter. Similarly a separate solar powered transmitter sends the data from the separately installed wind sensor in the indoor receiving console. The sensors are sited in the most suitable locations that are available in a suburban backyard and are sited in more exposed locations than previously.

The Temperature and Humidity sensor (SHT-31) is mounted 1.5 metres above grass in a radiation shield which protects the sensor from sunlight and rain while allowing air to flow freely through. The shield was upgraded on 3 November 2018 with the addition of a solar powered fan to keep air moving while the sun is out which ensures heat doesn't collect inside the shield on calm sunny days. It is sited as far from buildings and trees as possible though is affected by some degree, with a large tree to the NE. The tipping bucket rain sensor adjoins the temperature and humidity sensor with its rim at 1.7 metres above grass and measures to a resolution of 0.2 mm. The anemometer and wind vane which measures wind speed and direction is mounted as high as possible at 3.8 metres above ground level and about 0.3 metres above roof level. This is sheltered to the SW and NE to E by trees, with very good exposure to the NNW to NNE and reasonable exposure in the other directions. Air pressure and indoor temperature is measured by the indoor receiving console.

The accuracy of the sensors, not taking into account the siting of the sensors is +/- 0.3 C for temperature , +/- 2 % for relative humidity, +/- 0.3 hPa for air pressure, �4% for rainfall total or one tip of the bucket (0.2mm) for rainfall rates of up to 100 mm/hr, whichever is greater, �5% for rainfall rate of less than 127 mm/hr, +/- 3.2 km/h or �5% for wind speed, whichever is greater and +/- 3� for wind direction.

The weather Station previously in use with Cumulus is the La Crosse WS 2306 which records inside and outside Temperature, Humidity, Rainfall, Barometric Pressure and Wind Speed and Direction. It records from three outdoor sensors at 128 second intervals and transmits via wireless signal to a base unit indoors. The rain and wind sensors are mounted at roof level (2.4m) to allow for good airflow and reasonably accurate measurements with a suitable calibration for the wind sensor to report wind speeds at 10 metres. The Temperature Humidity Sensor is located under the eaves protected by direct sunlight, while air pressure and indoor temperature are measured indoors.

The La Crosse WS-2306 accuracy of the rainfall is to within +/- twenty per cent of a manual gauge on the same site, daytime temperatures is within 1 degree of expectation, overnight temperatures under report by 1 to 4 degrees, maximum humidity under reports by up to 10 per cent (minimum humidity also at times at very low humidity) and wind under or over reports slightly at certain days especially in gusty winds. This is due to the siting of the low accuracy sensors, the low update frequency and low accuracy of the equipment. However all other measurements are within acceptable accuracy. Therefore use the information as only a general guide.

Note that the manual data is more accurate than the previously used La Crosse WS-2306 station (non- professional low accuracy equipment) in use with Cumulus as the manual data makes allowances for inaccurate data due to the siting of the sensors. This is because the overnight temperature and humidity was sited under the eaves and does not measure the extremes as well, wind readings are not entirely accurate and the automatic rain gauge measures to 0.5mm resolution and is not as accurate as the manual gauge which measures to 0.1mm resolution.

To maintain privacy the station longitude and latitude coordinates provided on this site are only approximate.

Details of system used to process the data
Weather Station Details
Weather Station Davis Vantage Pro 2
Weather Station Location Ferny Grove, Brisbane, Queensland,Australia - 12KM North West of Brisbane and 20 KM west of coast
Computer WeatherSoftware Cumulus
Computer Software Version 3.0.0 3048
Program Up Time -46 days -1 hours
Update Interval Recorded at 5 minute intervals except when the weather software is running it is measured each minute and is updated at the start and end of most days,
Last Update 19/04/2019 23:00:02
Last Software error ------ ------
Weather Software Start Date 06 October 2011
Total number of data packets received 26037
Number of missed data packets 269
Longest streak of consecutive packets received 1757
Number of packets received with CRC errors 58
Percentage of good packets received %
The console firmware version 3.80
Number of times the console resynchronised with the transmitter 0
Console battery voltage 4.49
Integrated Sensor Suite battery condition ok
Wind speed and direction transmitter battery condition ok
Data Processing System Details
Operating System Unix 4.14.98.7
Operating System Language English (United Kingdom)
System Up Time 0 days 0 hours
CPU n/a
Number of Processors 4
Memory Status n/a)
Display Size n/a
Allocated Memory 0.00 MB
Disk Space n/a
Free Disk Space n/a

Acknowledgements

Many thanks to Cumulus from here which was written by Steve Loft and is used as the main software for handling of the station data on this site.

Thanks also goes to the following websites who provide freely reusable data or is used for collecting data to present on this site:

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Page updated 19/04/2019 23:00:02
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