Some figures relating to rainfall over the 6 and 12 months
up to the end of March, 2001: at Tawfield, SW Bracknell, Berkshire
12 months: (April 2000 to March 2001)
Total rainfall=1208.2mm (173% of estimated 1961-90 climatology) [ worthy
of somewhere in the middle of Dartmoor ]
Days >=0.2 mm: 199
Days >=1.0 mm: 164
Days >=10.0 mm: 36
Days >=25.0 mm: 5
Of the total of some 1208 mm of rain in these 12 months, 640 mm (53%) were due
to events of >=10.0mm in ea. 24 hr period. 6 of these months each provided
more than 100mm of precipitation (viz: April, May, October, November, December
and March)
Longest 'dry' periods between events of ppn >=0.2mm 8days: in two blocks ...
14th to 21st July 2000 & 11th to 18th January 2001.
6 months: (October 2000 to March 2001) i.e. the 'winter' half-year.
Total rainfall=737.0mm (which represents 61% out of the total actual
rainfall for the past 12 months, and some 197% of the estimated long-term
climatological average (1961-90) hereabouts.
65% of days (09-09Z) in this 6 months period managed >=0.2mm of ppn, and
just over half (51%) recorded rainfall/snowfall equivalent >=1.0mm. There
were 23 days in these 6 months with 10mm or more, and 3 days with 25mm or more.