Storm Desmond brought out the scaremongers and ‘storm chasers’ who want to blame it on man-made causes….the rainfall was said to be the heaviest ever recorded…and of course temperatures generally said to be record breaking.
However things ain’t what they seem, it depends on which statistic you look at.
The highest temperature in the UK was in 2003 and if you look at record temperatures by month they are spread right throughout the last century and the highest wind speeds were in the 1980’s to 1990’s.
And what of that record rainfall?
Highest 24-hour rainfall totals for a rainfall day (0900-0900 GMT)
Country Rainfall (mm) Date Location England 279 18 July 1955 Martinstown (Dorset) Scotland 238 17 January 1974 Sloy Main Adit (Argyll & Bute) Wales 211 11 November 1929 Lluest Wen Reservoir (Mid Glamorgan) Northern Ireland 159 31 October 1968 Tollymore Forest (County Down) The highest 24-hour total for any 24-hour period is 341.4 mm from 1800 GMT on 4th to 1800 GMT on 5th December 2015 at Honister Pass (Cumbria).
That record rainfall of 341.4mm (on a gauge only active since 1970) was not in the offical 24 hour period of 0900 to 0900….just how do they measure it? Surely they must make a continuous measurement of rainfall every hour, record it and then they are able to assess any 24 hour period. How long have they been able to do that work which seems very labour intensive if done manually?…which suggests it is a modern innovation and such records don’t exist for earlier periods….maybe even as late as the 50’s.
If such records could not be kept in previous eras how can the Met. Office claim such a record when it is just as likely that any random 24 hour period in a previous era, if recorded, could have shown similar rain levels?
The Met. Office itself says a record is only a record if standardised…
Weather extremes
The tables show the national weather records. To ensure consistency, these weather records are only given for stations with standard instruments and exposure. Although some records have been broken by non-standard stations, these are not accepted as official records for this reason.
You have to suspect similar rainfall in previous periods especially as the 1800’s had periods of very heavy rain….one random 10 year period being the wettest on record to coin a phrase.
The wettest year on record…1872….2012 two places behind.
The driest year on record….1788…2003 is ranked only 25th driest.