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Synoptic situation
An area of low pressure with associated troughs and fronts
was responsible for heavy rainfall over
much of the UK, especially central southern England and the north-west
on 9th September
2002.
Rainfall maps
The map below shows the 24-hour rainfall for 9 September
2002.
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Rainfall table - 9 September 2002
The following table consists of the data which were available from
our real-time network, and shows the highest values recorded over
various periods on the 9th September 2002.
There was also a report from Swanage (Dorset) of 121.4 mm in the
24-hour period ending 18:00 on the 9th, which would give a return
period of around 280 years.
| RAINFALL TABLE
- 9 SEPTEMBER 2002 |
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Rainfall
Station
|
|
Start date/time of Rainfall and
length of duration
|
|
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St Catherine's Point
|
74.0
|
9 September 2002 09:00 - 1 day
|
65
|
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Point of Ayre
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66.8
|
9 September 2002 09:00 - 1 day
|
32
|
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Hurn
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43.0
|
9 September 2002 09:00 - 1 day
|
3.2
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West Freugh
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42.6
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9 September 2002 09:00 - 1 day
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5.1
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Liverpool Museum
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39.2
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9 September 2002 09:00 - 1 day
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5.1
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| |
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|
|
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Isle of Portland
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40.4
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9 Sept 2002 07:00 - 12 hours
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4.3
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St Catherines Point
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71.4
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9 Sept 2002 11:00 - 6 hours
|
166
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Hurn
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39.0
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9 Sept 2002 12:00 - 6 hours
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8.8
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Liverpool Museum
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35.0
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9 Sept 2002 14:00 - 6 hours
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8.9
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| Boscombe Down |
30.2
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9 Sept 2002 12:00 - 6 hours |
4.0
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Liverpool Museum
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23.8
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9 Sept 2002 16:00 - 2 hours
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7.8
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Hurn
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22.0
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9 Sept 2002 13:00 - 2 hours
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5.8
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St Catherines Point
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53.2
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9 Sept 2002 14:00 - 1 hour
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473
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The St.Catherine's Point rainfall was the highest 24-hour 09 to
09 total since records began in 1982 (the previous highest was 42
mm on 2nd May 1996).
The total for Swanage (unconfirmed) is the highest in a 24-hour
period (compared with 09 to 09 totals) since records began in 1961,
the previous highest being 57.5 mm on 10th June 1971.
Point of Ayre's rainfall is the 3rd highest 24-hour 09 to 09 total
since records began in 1962. The record is 69.8 mm which fell on
1st July 1968.
The average September 1961-1990 rainfall can be found here. The Swanage total is almost double the average monthly rainfall for September, while just over 100% of the average September rainfall fell
at St.Catherine's Point in just 6 hours.
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Radar imagery
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Hourly radar imagery from
9 September 2002.
View a larger
version (195 k)
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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.
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