Record rainfall - October/December 2002

Highest 30-day rainfall totals

The data in the following table has been derived from the homogeneous precipitation series, which are based upon selected station data. The series goes back to 1931 (using data available on 25 November 2002).

30 day rainfall totals
Region Highest 30-day total in October/ November 2002 Record 30-day rainfall totals, using daily data back to January 1931
Northern Ireland 226.0 mm, beginning 20 October 2002 This is the highest 30-day total, previous highest 217.9 mm starting 19 October 1989.

England and Wales

209.4 mm, beginning 11 October 2002 This is the 3rd highest 30-day total in the series (treating each event separately). Highest 30-day total 240.0 mm, starting 9 October 2000.
Northwest England and Wales 240.4 mm, beginning 11 October 2002 This is the 3rd highest 30-day total in the series (treating each event separately). Highest 30-day total 247.0 mm, starting 20 October 1937.
Central England 155.8 mm, beginning 11 October 2002 This is the 3rd highest 30-day total in the series (treating each event separately). Highest 30-day total 182.8 mm, starting 22 November 1939.

October rainfall totals

The following table, uses actual rain-gauge information available from our real-time network on 1 November 2002.

Rainfall - October 2002
Station Rainfall total (no of days of data used) Highest previous October totals
Milford haven, Pembrokeshire 283.8 mm (31 days) Highest October rainfall total, previous highest 250.2 mm in 1987, records back to 1964.
Dyce, Aberdeen 230.4 mm (31 days) Highest October rainfall total, previous highest 200.0 mm in 1960, records back to 1957.
Aboyne, Aberdeenshire 230.0 mm (31 days) Highest October rainfall total, previous highest 156.2 mm in 1993, records back to 1990.
Charterhall, Scottish Borders 198.0 mm (30 days) Highest October rainfall total, previous highest 132.7 mm in 1993, records back to 1989.
Leuchars, Fife 169.6 mm (31 days) Highest October rainfall total, previous highest 148.8 mm in 1976, records back to 1957.
Boulmer, Northumberland 158.8 mm (31 days) Highest October rainfall total, previous highest 130.0 mm in 1981, records back to 1975.
Pershore, Worcestershire 133.8 mm (31 days) Highest October rainfall total, previous highest 131.8 mm in 2000, records back to 1961.
Hillsborough, County Down 154.2 mm (31 days) 2nd highest rainfall total, highest total 174.7 mm in 1990, records back to 1979.
Aldergrove, County Antrim 157.2 mm (30.5 days) 3rd highest rainfall total, highest total 175.8 mm in 1976, records back to 1949.
Yeovilton, Somerset 142.2 mm (30.5 days) 3rd highest rainfall total, highest total 188.4 mm in 1976, records back to 1964.

November rainfall totals

The following table, uses actual rain gauge information available from our real-time network on 2 December 2002.

Rainfall - November 2002
Station Rainfall total (no of days of data used) Highest previous November totals
Milford Haven, Pembrokeshire 371.8 mm (29.5 days) Highest November rainfall total, previous highest 261.6 mm in 1970, records back to 1964.
Culdrose, Cornwall 253.3 mm (29.5 days) Highest November rainfall total, previous highest 227.2 mm in 1963, records back to 1961.
Ballypatrick Forest, County Antrim 249.8 mm (30 days) Highest November rainfall total, previous highest 194.3 mm in 1991, records back to 1988.
Middle Wallop, Hampshire 244.6 mm (30 days) Highest November rainfall total, previous highest 176.4 mm in 2000, records back to 1975.
Hurn, Dorset 234.6 mm (30 days) Highest November rainfall total, previous highest 217.3 mm in 1970, records back to 1952.
St.Mawgan, Cornwall 235.6 mm (30 days) Highest November rainfall total, previous highest 200.1 mm in 1996, records back to 1957.
Yeovilton, Somerset 192.4 mm (30 days) Highest November rainfall total, previous highest 140.1 mm in 1970, records back to 1964.
Aboyne, Aberdeenshire 187.8 mm (30 days) Highest November rainfall total, previous highest 172.2 mm in 1997, records back to 1990.
Aldergrove, County Antrim 158.2 mm (30 days) Highest November rainfall total, previous highest 144.8 mm in 1982, records back to 1949.
Hillsborough, County Down 149.8 mm (28 days) Highest November rainfall total, previous highest 148.9 mm in 1995, records back to 1979.
Benson, Oxfordshire 142.8 mm (29.5 days) Highest November rainfall total, previous highest 139.5 mm in 1970, records back to 1963.
Bracknell, Berkshire 165.8 mm (30 days) 2nd highest rainfall total, highest 175.2 mm in 1974, records back to 1971.
Heathrow, Greater London 151.0 mm (30 days) 2nd highest rainfall total, highest 151.2 mm in 1970, records back to 1949.
Dyce, Aberdeen 185.4 mm (30 days) 3rd highest rainfall total, highest total 268.3 mm in 1984, records back to 1957.
South Farnborough, Hampshire 170.2 mm (30 days) 3rd highest rainfall total, highest total 181.7 mm in 1974, records back to 1957.

The two-month total at Dyce currently stands at 415.8 mm for October and November, making it the highest two-month total since the Met Office electronic archive began for Dyce in 1957. The previous highest two-month spell was November and December 1984 with 387.4 mm.

The wettest two-month total at Milford Haven was 655.6 mm for October and November, making it the highest two-month total since the Met Office electronic archive began for Milford Haven in 1964, previous highest two-month spell was September and October 1976 with 421.3 mm.

December rainfall totals

The following table, uses actual rain gauge information available from our real-time network on 7 January 2003.

Rainfall - December 2002
Station Rainfall total (no of days of data used) Highest previous December totals
Bracknell, Beaufort Park 125.0 mm (31 days) 2nd highest rainfall total, highest 150.1 mm in 1978, records back to 1971.
Heathrow 119.0 mm (31 days) 2nd highest rainfall total, highest 119.3 mm in 1989, records back to 1949.

26 December 2002 - 3 January 2003 rainfall totals

The flooding at the end of December 2002 and beginning of January 2003, was the result of a wet three-month period. The maps below show the nine-day rainfall totals prior to and around the time of the flooding, with some areas receiving 100 mm in this period, and many stations in south-east England experiencing 125 to 150% of December's average rainfall in this period.

Nine-day rainfall maps, 26 December 2002 to 3 January 2003:

Actual (mm) (per cent, compared to the whole of December)

26dec3janRainfall_Actual

Actual (mm)(per cent, compared to the whole of December)

26dec3janRainfall_Anomaly

October and November rainfall combined

These initial regional averages use data available from about 180 observing sites available on 2 December 2002. They represent an initial assessment of the rainfall that was experienced across the UK during October and November 2002 and how it compares with the 1961 to 1990 average. The column headed 'Anom' (anomaly) shows percent of the 1961-90 long-term average.

October and November 2002: rainfall actual

octnov02Rainfall_Actual

October and November 2002: rainfall anomaly

octnov02Rainfall_Anomaly

Rainfall - October and November 2002
Region Actual (mm) Anomaly (%)
UK 304.6 137
England 256.3 163
Wales 438.5 151
Scotland 338.8 108
N Ireland 353.3 160
England & Wales 281.3 161
England N 253.8 141
England S 257.6 179
Scotland N 274.3 76
Scotland E 353.2 167
Scotland W 413.0 116
England E & NE 212.8 157
England NW & Wales N 335.9 127
Midlands 234.4 171
East Anglia 193.7 174
England SW & Wales S 416.2 170
England SE & Central S 274.4 181

October to December Rainfall (combined)

These initial regional averages use data available from about 180 observing sites available on 7 January 2003. They represent an initial assessment of the rainfall that was experienced across the UK during October to December 2002 and how it compares with the 1961 to 1990 average. The column headed 'Anom' (anomaly) show the per cent of the 1961-90 long term average.

October to December 2002: rainfall actual

octdec02Rainfall_Actual

October to December 2002: rainfall anomaly

octdec02Rainfall_Anomaly

Rainfall - October to December 2002
Region Actual (mm) Anomaly (%)
UK 413.7 123
England 380.7 158
Wales 613.7 137
Scotland 407.6 87
N Ireland 446.7 136
England & Wales 412.7 153
England N 384.8 142
England S 378.5 170
Scotland N 317.3 59
Scotland E 444.9 141
Scotland W 492.8 93
England E & NE 323.8 157
England NW & Wales N 491.9 123
Midlands 350.0 164
East Anglia 291.2 175
England SW & Wales S 581.3 152
England SE & Central S 414.8 179

Last updated: 11 February 2013