Heavy rainfall/strong winds - 13 October 2002

Heavy rainfall and strong winds occurred over much of the south-west of the UK on the 13th October 2002.

The synoptic chart shows the situation at 1200 GMT on the 13th October, with a low pressure system and associated fronts over the far south-west of the UK.

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Rainfall Contour Maps

The map shows the amount of rainfall recorded, using gauge data available from the real-time network on the 14 October 2002.

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Individual 24-hour rainfall map for 12 October 2002

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Individual 24-hour rainfall map for 13 October 2002

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Gust and Hourly Mean Wind Speed Maps

These maps show the highest gust and mean wind speeds recorded, using data available from the real-time network on the 14 October 2002.

Highest hourly mean wind speed was 47 knots (54 m.p.h.) at The Needles (Isle of Wight).

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Highest Gust speed was 65 knots (75 m.p.h.) at Culdrose. However, Alderney Airport on the Channel Islands reported a spot gust of 74 knots (85 m.p.h.).

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Rain Gauge Information

The rainfall table, which has the data available from our real time network, shows the highest rainfall totals for various periods on the 13th October 2002.

Rainfall Table - 13 October 2002
Rainfall
Station
Rainfall Total
(mm)
Start date/time of Rainfall and
length of duration
Return Period
(years)
Pembrey Sands, Carmanthenshire 72.2 13 October 2002 09:00 - 12 hours 81
Milford Haven, Pembrokeshire 69.2 13 October 2002 09:00 - 12 hours 62
Gawlish, Devon 65.5 13 October 2002 09:00 - 12 hours 39
Dunkeswell, Devon 58.2 13 October 2002 09:00 - 12 hours 20
St. Athan, Glamorgan 42.0 13 October 2002 09:00 - 12 hours 5.5
Cardiff Weather Centre 40.0 13 October 2002 09:00 - 12 hours 5.7
       
Milford Haven, Pembrokeshire 40.0 13 October 2002 14:00 - 3 hours 25
Milford Haven, Pembrokeshire 32.0 13 October 2002 14:00 - 2 hours 20
Milford Haven, Pembrokeshire 20.0 13 October 2002 15:00 - 1 hours 11

Pembrey Sands reported 73.2 mm in the 24-hour period ending 09 GMT on 14 October, their highest 24-hour total (09-09 GMT) since Met Office electronic archive data records began in 1994. The previous highest value was 60.0 mm on the 21 April 1995 and the previous highest October figure was 39.6 mm on 29 October 2000). The previous highest 12-hourly value (09-21 GMT or 21-09 GMT) was 38.8mm on 13 August 2000.

Milford Haven reported 72.4 mm in the 24-hour period ending 09 GMT on 14 October, their highest 24-hour total (09-09 GMT) since Met Office electronic archive data records began in 1964. The previous highest value was 70.5 mm on the 25 August 1986 and the previous highest October figure was 43.3 mm on 14 October 1976. The previous highest 12-hourly value (09-21 GMT or 21-09 GMT) was 61.5 mm on 25 August 1996.

Gawlish reported 65.5 mm in the 24-hour period ending 09 GMT on 14 October, their highest 24-hour total (09-09 GMT) since Met Office electronic archive data records began in 1989. The previous highest value was 65.2 mm on the 10 June 1993 and the previous highest October figure was 39.3 mm on 29 October 2000. The previous highest 12-hourly value (09-21 GMT or 21-09 GMT) was 62.9 mm on 10 June 1993.

The average October 1961-1990 rainfall.

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Radar imagery

3-hourly radar imagery from 13/14 October 2002

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Please note: The empirical relationship between radar reflectivity and rainfall rate is fixed whereas in reality this is highly dependent on precipitation type and is very different for rain and hail.

Last updated: 11 February 2013