Weather Analysis for Great Bealings

Here's some analysis of the weather we've had here since February 2004.

Rainfall

There's one interesting feature of the rain I'd like to point out - the Daily Weather Report shows that the greatest rainfall in one hour was 35 mm concluding at 0:53 a.m. on July 23 2004. But it doesn't say that for most of that hour, it wasn't actually raining! The peak rate was 3 mm per minute and we had 33 mm of rain in only 19 minutes. In the book "Weather Patterns of East Anglia" the author, Alfred Glenn, gives 0.47" of rain in 2.5 minutes as the heaviest rainfall recorded since 1900 - a rate of 11.3" per hour which fell in 1917. Others of 6.2" per hour in 1924 and 7.7" per hour in 1946 are also recorded. The fall in July 2004 was 4.1" per hour over the 19 minutes when it fell heavily.

Rain that heavy and that much in a day is very rare here. The figure below gives the frequency of rainfall per day. Note that the graph is truncated at 20mm in one day: the record is actually 55.4 mm on May 27 2014.

Rainfall Incidence

As can be seen, we get rain free days for about 2/3rds of the time with remarkable consistency, year to year, although 2009 and 2010 have bucked this trend a little, with dry days for 70% of the time.

The graph below shows the rain we've received each month, and whether we are in surplus or deficit compared with average rainfall. As can be seen, between August 2004 and April 2006, the weather was generally dry, leading to a deficit over that period of about 230 mm - about 6 months' typical rainfall. May and August 2006 broke the run of dry weather we'd been having up to then. However, generally since 2008 the weather has been dry, taking us to significant current deficit.

Rainfall Deficit

Rainfall over 15 days

It's interesting to look at rainfall over a period of 15 days, since one definition of a drought is 15 consecutive days without measurable rain. The graph below gives rainfall recorded in the 15 days prior to the date shown on the axis.

Rain over 15 days

We see 3 significant droughts. One was in June 2005, where there was no recorded rain for 24 days, April/May 2007, where no rain fell for 38 days, including a completely rain-free April and June/July 2018 with no rain for 54 days. Other recorded brief droughts are in June 2004, September 2005, December 2005, February 2006, July 2006, September 2007, February 2008, December 2008, April 2009, October 2009, March 2010, April 2010, April/May 2011 and November 2011. Also notable is the record amount of rain in that fell in 15 days between May and June 2008.

Cumulative Annual Rainfall

Pressure

So far, we've averaged 1014.4 mBar, compared with the expected "normal" pressure of 1013 mBar. The pressure frequency chart below illustrates the variation in pressure..

Pressure Frequency Graph

This is based on pressure measurements recoded every minute for the period - a total of 9,034,076 readings. As can be seen, the most common measurement (the mode) is 1016 mBar. There's a substantial tail to the left, caused by 5 periods of very low pressure. January 2020 saw my record high pressure - 1048.6 mBar - and March 2008 a record low of 963 mBar.

Average Temperature

The graph below shows the average temperature for each month since I've had the weather station.

Average Temperatures

It shows that, generally and unsurprisingly, each year has followed a pretty close pattern. The extraordinary months were July 2006, which was about 4°C hotter than normal, December 2010, about 4°C below normal and December 2015, about 5°C above normal.

All Time Monthly Records

Month Max Temp Max Date Min Temp Min Date Max Rain Max Year Min Rain Min Year Ave Rain
Jan
14.6
20/01/2008 13:25
-9.3
08/01/2010 08:35
85.4
2021
11.9
2006
49.5
Feb
18.0
27/02/2019 13:20
-11.8
11/02/2012 06:00
87.0
2007
8.0
2004
41.6
Mar
21.2
31/03/2021 12:48
-7.0
04/03/2005 02:41
98.5
2008
6.1
2011
36.8
Apr
28.6
23/04/2011 13:11
-6.2
07/04/2013 06:30
95.8
2012
0.0
2007
26.5
May
30.8
24/05/2010 13:10
-2.2
13/05/2010 05:15
119.0
2014
1.4
2020
53.2
Jun
32.9
23/06/2005 13:32
1.4
08/06/2005 05:09
102.0
2007
7.0
2005
43.4
Jul
35.0
09/07/2010 14:14
4.9
02/07/2014 04:56
105.0
2004
10.2
2016
53.8
Aug
32.9
08/08/2020 14:30
5.3
24/08/2014 04:02
142.0
2006
8.9
2009
59.3
Sep
29.6
05/09/2013 13:45
1.3
25/09/2018 06:58
56.9
2010
9.5
2011
36.8
Oct
29.8
02/10/2011 13:54
-2.3
29/10/2008 21:54
95.4
2012
20.4
2017
53.7
Nov
18.4
04/11/2010 12:58
-7.0
21/11/2004 04:29
86.6
2014
18.8
2011
52.6
Dec
15.4
22/12/2015 11:49
-11.8
20/12/2010 05:34
89.8
2020
12.8
2016
51.2

Yearly Records

Year
Temperature
Pressure
Humidity
Gust
Average Wind
Rainfall
Min
Max
Ave
Ave Min
Ave Max
Min
Max
Ave
Min
Max
Ave
Max
Ave
Max
Ave
mm
Days
2005
-7.0
32.9
10.4
6.0
15.2
981
1041
1016
28
98
78
27
3.4
17
2.2
466.1
112
2006
-6.9
34.6
11.0
6.7
15.8
978
1044
1015
23
98
71
34
4.2
19
2.9
650.1
115
2007
-7.0
29.9
10.7
5.9
15.8
976
1041
1015
23
98
72
35
4.1
23
2.8
732.2
113
2008
-7.2
31.7
10.2
5.7
15.3
963
1044
1013
15
98
59
31
4.1
24
2.8
713.2
115
2009
-7.5
31.8
10.6
5.9
16.1
964
1037
1013
16
98
64
27
3.4
15
2.2
500.1
97
2010
-11.8
35.0
9.4
5.0
14.5
969
1041
1013
11
98
60
24
2.9
15
1.9
498.0
90
2011
-5.6
32.4
11.2
6.6
16.6
978
1041
1015
13
98
54
28
3.6
17
2.3
433.3
81
2012
-11.8
31.6
10.3
6.0
13.9
975
1044
1014
29
100
85
33
4.7
20
2.7
712.3
132
2013
-9.3
29.8
9.6
5.8
13.7
976
1039
1015
29
100
85
40
4.4
24
2.4
485.4
115
2014
-4.0
28.4
11.2
5.9
15.5
977
1041
1012
39
100
86
39
4.5
23
2.5
629.0
114
2015
-5.4
30.1
10.6
5.9
14.8
975
1041
1016
33
100
85
42
5.3
23
3.1
501.0
117
2016
-5.4
30.2
10.6
6.8
15.0
973
1045
1015
34
100
86
38
4.7
23
2.7
486.6
95
2017
-7.1
28.9
10.7
6.7
14.9
971
1039
1015
30
100
86
44
5.0
27
3.0
462.0
93
2018
-5.7
33.3
11.2
6.8
15.1
984
1039
1015
29
100
85
44
4.6
31
2.6
513.0
107
2019
-6.9
33.7
10.6
6.4
14.9
970
1043
1013
27
100
86
37
4.7
24
2.7
575.8
117
2020
-3.1
32.9
11.2
5.8
15.7
968
1049
1014
28
100
84
45
5.1
24
3.0
515.2
104
2021
-3.3
12.4
3.2
0.8
5.4
973
1031
1010
68
100
95
27
5.6
14
3.4
85.4
16

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