September 2019 was mostly dry, but still wet!

The headline says it all. September 2019 was really dry and quite pleasant for the first three weeks before the rains came back.  Only 8.1mm fell in the first three weeks, as pressure remained high. Remarkable that the total for the month ended up at 81.0mm, making it a ‘wet’ month overall. That just shows how monthly statistics can completely mask what lies within.

Temperature was very equable, with no really warm days, but no really cold ones either. The warmest temperature came in a short 3 day spell grouped around 20th, when 21.9 degC was reached. The coldest was the morning of the 8th when temps dropped to 3.5 degC.

September’s overall mean temp (mean max+mean min/2) was 12.8 degC, which is slightly below the 1981-2010 mean. This has been rare in recent times.

 

The River Floods Again – September 2012

The very wet Summer of 2012 continued into Autumn. The river burst it’s banks again in the city. This red car (Ford Ka) became quite famous as it bobbed about in front of the new Radisson Hotel (due to open a couple of months after this photo was taken).

A view of the flood from the Passport Office/National Savings Building. The red car can just be seen in the left mid-distance.

Rising water levels in the River Wear at Durham Credit: ITV Tyne Tees

The Figures

There was exceptionally heavy rainfall and flooding towards the end of the month. The rainfall was spread across two days, with 47.4mm recorded on the 24th and 40.8mm on the 25th. The former is the 27th wettest day on record at Durham since 1850 and the latter was the 41st wettest. Looking at 2-day totals, the combined total of 88.2mm is the 5th highest 2-day total since 1850, although well less than the record holder, 10th / 11th September 1976 when a total of 120.1mm was recorded. The heaviest rain fell late on the evening of the 24th when 16mm fell in 3 hours. It was the wettest September since 1976 and the 7th wettest on record.

http://community.dur.ac.uk/durham.weather/weather-data-2011-2015/the-weather-at-durham-in-2012/september-2012/

Professor Tim Burt
Department of Geography
Durham University

Website created by D.K. O'Hara Copyright 2018. dkohara.com