Bristol Weather Station

Totterdown, Bristol, UK.

http://www.bristolweather.org

For further information e-mail  Barry (change the "AT")

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November 2018: The temperature in November 2018 was 1.0C above the 30 year average.
Rainfall was very close to the 30 year average for the month at 91.9 mm.

Air pressure was below the average and the maximum wind gust of 46 mph on the 29th was the strongest since 54 mph on 4th January 2018.
It was also the windiest month since January 2018.

Sunshine was close to the monthly average but the daily and hourly maximums were the highest for any November since this data started in 2005. The sunniest day was on the 2nd, and the highest hourly incidence of solar radiation was 400.17 WM2 at 13:00 hours on the 14th..

Autumn 2018: It was the 39th driest autumn since records began in 1882 which is 137 years of data with a total of 186.8 mm.
It has been the 19th warmest autumn in 128 years of data with an average temperature of 12.0C when the all time average is 11.0C.

Annual 2017: The annual average temperature of 12.1C in 2017 was 0.8C above the 30 year average for Bristol. This makes 2017 the 3rd warmest year (equal with 1989, 1990 and 1997). Continuous records for average temperature having been found since 1891 in Bristol.

The Total rainfall for 2017 was 751.0 mm. This is 138.9 mm less than the 30 year average for Bristol and the driest year since 2011 when only
723.1 mm was recorded. 2017 was the 39th direst year in Bristol in 165 years of continuous annual data for the city.

It was the dullest year on record since this data started in 2005 with a annual average 0f 37.7% of maximum sunshine. The average is 40.0%..

The 2017 Annual summary is here: http://www.bristolweather.org/weather2017annual.htm

For the full monthly summary please go here: http://www.bristolweather.org/weather2018nov.htm

The Meteorological site is situated in an urban housing area approximately one mile to the south of the Centre of Bristol. This area is in a district called Totterdown.

Statistical correlations with the Bristol Meteorological Office site, that was less than two miles to the North and was situated on top of a City Centre office block, were generally good with rainfall and barometric data particularly close.

The site of the station is approximately 34 metres above sea level with the manual instruments mounted in a Stevenson screen. The screen is sited centrally in a small concreted garden area. A Snowdon rain gauge is mounted correctly in the ground but does not have the full open space required around it. A  Davis Vantage Pro2 Plus automatic weather station (AWS) was added in May 2005 and this is mounted 4 feet above a concrete shelter. The wind data is gathered automatically from a Davis Vantage Pro2 Plus anemometer which is sited 3.3 metres (10 feet) above the house top.

Manual observations are still taken at approximately 09:00 hours GMT every day for rainfall and cloud cover. Rainfall manually recorded in the Snowdon rain gauge is entered for the previous day. The wind data is constantly logged and automatically reset at 24:00 hours GMT every day (in the summer BST -1 hour. The Davis rainfall tipping bucket was recalibrated in November 2005 and is now consistently under 3% under recording (an improvement from installation in May 2005 when 10% was more typically the norm).

Since the arrival of the Davis Vantage Pro2 Plus equipment in May 2005 temperatures, humidity and barometric pressure are recorded from the new equipment. These figures will be more accurate and will be taken at exactly 09:00 GMT (in the summer BST -1 hour) as the data is now logged to a computer.

By default the Davis equipment records every parameter for the 24 hour period 00:00 to 23:59 BST or GMT. Data analysis will enable manual data extraction of temperatures and rainfall to 09:00 GMT (adjusted in the summer). Due to the 0.2 mm (tipping bucket) measurements of precipitation recorded by the Davis equipment the Snowdon rain gauge will still be used due to its greater accuracy (see above).

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