| Heavy rainfall/thunderstorms |
Synoptic situation
An area of low pressure and associated troughs and fronts
were responsible for heavy rainfall/thunderstorms over much of the
UK, especially on 30
July 2002 and 1st
August 2002.
Rainfall maps
The map below shows the 24 hour rainfall for 30 July 2002.
The map below shows the 24 hour rainfall for 1 August 2002.
The map below shows the accumulated rainfall for the period from
27 July to 2 August 2002.
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Rainfall table - 30 July 2002
The following table, consists of the data which was available from
our network on the 31 July 2002, and shows the highest values recorded
over various periods on the 30 July 2002.
There was an unofficial report of 100 mm in the Halifax area.
| RAINFALL TABLE
- 30 JULY 2002 |
|
Rainfall
Station
|
24 Hour
Rainfall Total
(mm)
|
Start date/time of Rainfall and
length of duration
|
|
|
Marham
|
83.4
|
30 July 2002 09:00 - 1 day
|
126
|
|
Kirklees Council
|
75.2
|
30 July 2002 09:00 - 1 day
|
29
|
|
Waddington
|
72.8
|
30 July 2002 09:00 - 1 day
|
43
|
|
Emley Moor
|
66.0
|
30 July 2002 09:00 - 1 day
|
26
|
|
Cranwell
|
59.6
|
30 July 2002 09:00 - 1 day
|
17
|
|
Leuchars
|
57.4
|
30 July 2002 09:00 - 1 day
|
26
|
|
Sutton Bonington
|
56.4
|
30 July 2002 09:00 - 1 day
|
22
|
| |
|
|
|
| |
|
|
|
|
Kirklees Council
|
63.6
|
30 July 2002 09:00 - 0.5 days/12 hours
|
37
|
|
Waddington
|
59.6
|
30 July 2002 21:00 - 0.5 days/12 hours
|
34
|
|
Emley Moor
|
54.0
|
30 July 2002 09:00 - 0.5 days/12 hours
|
33
|
|
Leuchars
|
51.8
|
30 July 2002 21:00 - 0.5 days/12 hours
|
46
|
|
Cranwell
|
49.8
|
30 July 2002 21:00 - 0.5 days/12 hours
|
20
|
|
Warcop Range
|
47.2
|
30 July 2002 09:00 - 0.5 days/12 hours
|
17
|
|
Marham
|
46.2
|
30 July 2002 09:00 - 0.5 days/12 hours
|
20
|
|
Sutton Bonington
|
41.4
|
30 July 2002 09:00 - 0.5 days/12 hours
|
12
|
| |
|
|
|
| |
|
|
|
|
Kirklees Council
|
54.6
|
30 July 2002 13:00 - 5 hours
|
37
|
|
Marham
|
46.2
|
30 July 2002 13:00 - 5 hours
|
26
|
|
Sutton Bonington
|
37.6
|
30 July 2002 14:00 - 5 hours
|
14
|
|
Waddington
|
51.6
|
31 July 2002 02:00 - 4 hours
|
35
|
|
Cranwell
|
48.8
|
31 July 2002 02:00 - 4 hours
|
33
|
|
Leuchars
|
48.8
|
30 July 2002 22:00 - 3 hours
|
264
|
|
Warcop Range
|
38.6
|
30 July 2002 12:00 - 3 hours
|
33
|
|
Marham
|
36.0
|
31 July 2002 02:00 - 3 hours
|
18
|
|
Andrewsfield
|
28.4
|
30 July 2002 14:00 - 1 hour
|
21
|
|
Leuchars
|
26.0
|
30 July 2002 22:00 - 1 hour
|
167
|
|
The Marham 24 hour period rainfall value of 83.4 mm was the highest
since records began in 1957, previous highest 24 hour total was
61.2 mm on 30 August 1976.
The Marham 12 hour period rainfall value of 46.2 mm was the 3rd
highest since records began in 1957, 49.5 mm was recorded during
a 12 hour period on 30 August 1976 and 50.9 mm during a 12 hour
period on 10 July 1959.
The Waddington 24 hour period rainfall value of 72.8 mm was the
highest since records began in 1949, previous highest 24 hour total
was 56.0 mm on 15 July 1973.
The Waddington 12 hour period rainfall value of 59.6 mm was the
highest since records began in 1949, previous highest 12 hour total
was 49.4 mm on 14 August 1980.
(The above is using data from the standard 12 hour periods of 09Z-21Z
and 21Z-09Z )
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Rainfall table - 01 August 2002
The following table, consists of the data which was available from
our network on the 2 August 2002, and shows the highest values recorded
over various periods on the 1 August 2002.
| RAINFALL TABLE
- 01 AUGUST 2002 |
|
Rainfall Station
|
Rainfall total (mm)
|
Start date/time of Rainfall and
length of duration
|
Return
period
(years)
|
|
Fylingdales
|
114.6
|
1 August 2002 09:00 - 1 day
|
265
|
|
Leeming
|
91.2
|
1 August 2002 09:00 - 1 day
|
205
|
|
Loftus
|
69.4
|
1 August 2002 09:00 - 1 day
|
45
|
|
Topcliffe
|
66.2
|
1 August 2002 09:00 - 1 day
|
65
|
|
Dishforth
|
61.5
|
1 August 2002 09:00 - 1 day
|
33
|
|
Middlesbrough
|
55.2
|
1 August 2002 09:00 - 1 day
|
19
|
|
Leeds Weather Centre
|
50.6
|
1 August 2002 09:00 - 1 day
|
10
|
| |
|
|
|
| |
|
|
|
|
Fylingdales
|
84.0
|
1 August 2002 21:00 - 0.5 days/12 hours
|
195
|
|
Leeming
|
80.6
|
1 August 2002 21:00 - 0.5 days/12 hours
|
234
|
|
Loftus
|
64.6
|
1 August 2002 21:00 - 0.5 days/12 hours
|
86
|
| |
|
|
|
| |
|
|
|
|
Leeming
|
79.0
|
1 August 2002 21:00 - 10 hours
|
137
|
|
Loftus
|
58.4
|
2 August 2002 00:00 - 7 hours
|
60
|
|
Leeming
|
48.2
|
1 August 2002 21:00 - 4 hours
|
52
|
|
Loftus
|
34.6
|
2 August 2002 03:00- 4 hours
|
15
|
|
Leeming
|
26.0
|
1 August 2002 22:00 - 1 hour
|
32
|
|
The Leeming 24 hour period rainfall value of 91.2 mm was the highest
since records began in 1965, previous highest 24 hour total was
64.9 mm on 22 June 1982.
The Leeming 12 hour period rainfall value of 80.6 mm was the highest
since records began in 1965, previous highest 12 hour total was
53.0 mm on 15 June 2001.
The Fylingdales 24 hour period rainfall value of 114.6 mm was the
highest since records began in 1984, previous highest 24 hour total
was 75.2 mm on 13 September 1993.
The Fylingdales 12 hour period rainfall value of 84.0 mm was the
highest since records began in 1984, previous highest 12 hour total
was 61.2 mm on 8 December 1990.
( The above is using data from the standard 12 hour periods of
09Z-21Z and 21Z-09Z )
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Radar
imagery
|
 |
3 hourly radar imagery from 30 July 2002.
View a larger
version
|
 |
|
|
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.
|
ATD
animation
|
|
|
A loop showing 3 hourly lightning
strike frames over the UK from 06:00 28 July 2002 to 18:00 31
July 2002.
View a larger
version |
|
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|
