December 2020 weather review

The review of the weather at Ferny Grove during December 2020 is now available.

in December 2020 overnight temperatures were over 1 ºC above average and was the highest for December in 11 years. Daytime temperatures were close to average and the lowest in 5 years. Minimum temperatures in December were predominately above average during the month and were near or below average in the middle of the month and at the end of the month. Maximum temperatures in December saw two periods of warm days at the start of the month and between the 18th and 23rd, as well as near average or below average temperatures. The first 8 days of the month saw warm days and nights that were up 7 ºC above average during a low to severe intensity heatwave .

Rainfall in December was above average with a total of 145.9 mm (112.9% of the long term average). This is the highest for December since the current record high of 450.1 mm in 2010. The annual rainfall total remained above average at 23.3% above the long term average and was the highest since 1263.6 mm in 2015. Most rainfall in the month occurred between the 7th and 18th during an active period of drizzle, showers, rain, and mild thunderstorms. The first 8 days of the month was dry and later in the month there were some drizzle and light showers on some days. The highest daily total rainfall on the 14th of 70.1 mm was the highest for December since 82 mm on 28 December 1999. This rainfall was a result of light to moderate rain from the evening of the 13th to early on the 14th that was associated with a coastal low pressure system that brought severe weather conditions to coastal areas of south-east Queensland.

Most long period rainfall totals continue to remain below or well below average, that improved for many of these periods. 6 monthly rainfall improved a little to 18.3 mm below average, while 9 monthly rainfall deteriorated from 171.9 mm above average to 52.7 mm below average. 12 month rainfall improved by 91 mm to 94.2 mm above average and 18 month rainfall improved by 100 mm at 38 mm below average. 24 month to 48 month rainfall was between 156.7 mm below average for 48 month rainfall and 366.1 mm below average for 24 month rainfall. Compared with the same period in the previous year these periods improved, and the greatest improvement was 12 monthly rainfall that improved by 564 mm.

The summary containing the key information can be found here.

The full report of more detailed analysis is available here.

November 2020 weather review

The review of the weather at Ferny Grove during November 2020 is now available.

in November 2020 overnight and daytime temperatures were close to average. Minimum temperatures were near average or below average in the first half of the month and then warm nights during the rest of the month with some cool nights. Daytime temperatures were mostly below average in the first half of the month before most days were warm during the rest of the month. An 8 day cool period occurred for the daily maximum temperatures between the 6th and 13th that peaked at 7 ºC below average.

Rainfall in November was well below average with a total of 4.7 mm (4.9% of the long term average). This is a new record low for this location for the past thirty years beating the previous record low of 14.2 mm in 2019. The year to date rainfall remained above average at 3.8% above the long term average. Most rainfall in the month occurred on the 17th from the edge of two mild thunderstorms when 4 mm was measured. On the 5th there was a mid-afternoon brief light shower from a thunderstorm passing to the south with 0.5 mm of rainfall. On the 13th there was some light rain but with no measurable rainfall.

Most long period rainfall totals continue to remain well below average, that improved for some of these periods. 6 monthly rainfall improved slightly to 58 mm below average, while 9 monthly rainfall reduced significantly from 97.2 mm in the previous month to 205.9 mm below average. 12 month rainfall remained nearly the same as the previous month at 3.4 mm above average. 18 month to 48-month rainfall was between 140.7 mm below average for 48 month rainfall and 384 mm below average for 24 month rainfall. Compared with the same period in the previous year most of these periods improved, except for 36 monthly rainfall which have worsened and was the lowest since 2008 when it was 334.2 mm below average.

The summary containing the key information can be found here.

The full report of more detailed analysis is available here.

October 2020 weather review

The review of the weather at Ferny Grove during October 2020 is now available.

During October 2020 overnight temperatures were close to average and daytime temperatures were above average. Overnight temperatures were near or below average in the first half of the month before warm nights during most of the second half of the month. The 22nd to 29th saw warm nights of up to 6 ºC above average. Daytime temperatures were above average throughout the month with some days that were cool.

Rainfall in October was above average with a total of 119.5 mm (185.4% of the long term average). The year to date rainfall remained above average at 11.5 % above the long term average. From the 19th was an active period of showers, rain and thunderstorms with some moderate to heavy falls. 14 mm of rainfall fell in 8 minutes on the 25th during a severe thunderstorm with marble size hail. On the 31st was 2 hours of thunder from 4 nearby thunderstorms with very little rainfall.

Long period rainfall totals remained well below average during most periods though improved for some periods. 6 monthly rainfall improved by 130 mm to 64.5 mm below average. 9 monthly rainfall remained above average at 97.2 mm above average while 12 month rainfall was 12.2 mm above average, improving from 58.6 mm below average in the previous month. Periods between 18 to 48-month remained below average and was as much as 624.9 mm below average for 36 month rainfall.

The summary containing the key information can be found here.

The full report of more detailed analysis is available here.

Solar and air quality data

New data is now available on multiple pages to incorporate solar radiation, sunshine and air quality following the start of recording these parameters from 26 December 2020. These sensor were installed along with the change to using a Weatherlink Live receiving unit between 19 and 22 December 2020, which were then tested for compatibility with our processes and existing data.

The following pages have been updated with additional data:

  • The home page: the solar and air quality data have been added to the real time updates on the home page, sunshine/ night-time bands have been added to the real-time graph, the station forecast have been removed and a Bureau of Meteorology forecast added
  •  Gauges: A gauge for solar radiation was added
  •  Today and Yesterday: Averages, Totals and Extremes for Solar, Insolation, Sunshine and Air Quality added
  •  System Status: Reworked to align with the system changes and to provide additional system information now available with this change
  •  Glossary: Updated with additional terms of Air Quality, Insolation, Solar Radiation and Sunshine.

 A routine now runs at the start of each day to collate the air quality data into an additional daily database table used in the Historical graphs. The Realtime database table was altered to include air quality data. A monthly air quality database is also populated with data each 5 minutes.

A combination of our regular data updating on the website and these Realtime and Monthly database tables are used to update the tables and graphs on the website. The Realtime and Monthly database tables are also used as in the input to update the daily air quality database table.

Coming soon will be the addition of UV data. Also air quality data for the this month, this year and all-time records is also planned. Additional data will need to added to the daily database table in order to show that data along with the date and time of the occurrences.

Under progress is the calculation of daily potential evapotranspiration and possibly evaporation now that we are measuring solar radiation. Due to limitations with the system I am using it appears these will have to be calculated, rather than supplied by the weather station directly. These are rather complex multi-step calculations, so considerations are being made with the practicalities of that and what data will be shown from that on the website.