Looking Back On Our Weather Patterns – SEPTEMBER 2018
Bury St. Edmunds River Linnet Rainfall
Location – 1 mile west of Town Centre.
Height above MSL 46metres
Grid Reference TL 836638
█ Month’s Total Rainfall only 25.0mm
█ 49% of 1961-1990 Regional Average
█ 7 days with more than 1mm –1 less than average.
█ and only 8 days with significant rainfall of 0.2mm or more
█ Wettest 24hrs of 6.1mm was from 0900hrs on the 22nd – see below.
Only 10mm of rain fell on four days up to early morning of the 12th then no more until teatime on the 19th. Rainfall Stations have always recorded values 0900 to 0900 hrs GMT and the total thrown back to the day it started. The 22nd had only a little daytime rain but continuous moderate rain set in for about four hours before 0600 hrs the following morning and, by time of reading, 6mm fell and another 5mm up to a showery mid afternoon – in all 11mm over eight hours. The last week started with two frosty mornings and another on the 29th but it was sunny and dry.
In the four months from June, we’ve only had 103mm – half the average rain – the previous drier were only 100mm in 1990 and 90mm in 1921 but neither of these years suffered such extreme droughts like we have had this year. What a massive contrast 50 years ago!
There has been plenty of reflection in the Press and on TV recalling the dreadful floods fifty years ago. The Bury Free Press recently quoted that seven weeks’ worth of rain fell within 24hours on the 15th. That would have been the 83mm – 3.3inches – measured in the Abbey Gardens. The main reason for all the flooding on the Linnet and Lark was that the whole summer leading up to the 15th was very wet and unsettled.
The 30-average summer rainfall for our area is 152mm. The Abbey Gardens had 252mm – four inches more! Other sites in our area were similar. Significant was the rarity of such a devastating September after a very wet summer! Before the 15th deluge, even the first two weeks of September had over 30mm of rain.
The table shows the 3-month 1968 summer total in Column 1 – all falling from 37 days with more than 1mm – average is 24! At all sites, August was notably the wettest. I was then at RAF Stradishall’s Met. Office and it’s summer total was only 11mm less followed by 78mm on that classic day that made the River Stour severely flood Kedington.
East Anglia’s wettest areas over September were around our area, NE Norfolk and the Essex coast.
|Great Bradley Hall||250||132||85|
Broom’s Barn Research Station just north of Barrow