Rain in Sydney

[Don White]

This morning Sydney had 20.8 mm – the 10^th day out of the last 14  with 20 mm or more (including the last 5) and the 14 days out of 24  with 10 mm or more.  This is easily the most ever in a month in the 2^nd half of the year. However, the following table of consecutive wet days are quire common.

Consecutive days with more than 25 mm

 

No. Days	Year	Start Date	Rainfall Amounts							Total
6	1920	8 Dec	27.4	49.8	105.2	29.5	55.1	58.9		325.9
6	1964	7 Jun	66.3	36.8	38.1	85.6	41.4	101.9		370.1
6	2021	19 Mar	54.4	47.6	110.4	28.4	46.8	19.4		287.4
5	1867	19 Jun	26.4	104.6	55.4	84.6	34.0			305.0
5	1871	27 Apr	59.7	45.7	75.2	75.2	34.0			289.6
5	1877	29 Apr	45.3	95.3	28.2	88.4	27.2			284.4
5	2003	13 May	37.6	67.8	44.0	34.8	30.6			214.8
4	1860	26 Apr	43.2	62.0	130.8	191.0				427.0
	1860	22 Jul	67.6	68.1	33.3	28.7				197.7
	1889	25 May	56.6	102.9	119.1	212.3				490.9
	1873	23 Jul	33.5	27.7	57.7	53.6				172.5
	1900	23 May	89.2	52.3	79.5	48.0				269.0
	1913	9 Jun	29.7	37.3	58.9	28.2				154.1
	1914	17 Oct	35.6	35.6	63.2	25.4				159.8
	1916	29 Oct	47.2	28.4	36.1	26.2				137.9
	1917	19 Apr	40.9	32.3	45.7	31.5				150.4
	1945	10 Jun	31.2	35.3	38.6	60.5				165.6
	1950	15 Jun	85.9	105.2	66.3	26.7				284.1
	1951	18 Jan	56.9	42.4	33.0	33.3				165.6
	1984	6 Nov	98.0	45.0	44.2	234.6				421.8
	2011	20 Jul	76.8	39.2	88.2	57.4				261.6
	2020	7 Feb	79.0	70.6	66.0	176.0				391.6
	2022	6 Mar	33.8	31.4	95.4	50.8				211.4

 

Consecutive days with > 10 mm of rain

 

No. Days	Year	Start Date	Rainfall amounts
10	1908	31 Jul	20.8	23.1	37.3	33.3	36.8	10.4	10.9	11.2
			16.3	14.7
	2022	23 Feb	105.2	44.4	24,4	49.8	22.0	13.2	34.6	25.2
			50..8	19.6
8	1964	6 Jun	23.4	66.3	36.8	38.1	85.6	41.4	101.9	13.7
8	1916	28 Sep	21.3	47.2	28.4	36.1	26.2	21.1	46.7	86.9
8	1860	21 Jul	19.1	67.6	68.1	33.3	28.7	22.4	25.7	11.4
7	1988**	7 Apr	14.8	12.0	36.8	13.0	16.6	13.4	11.2
7	1890	1 May	12.7	59.7	14.7	10.2	30.7	33.0	16.3
7	1887	28 May	17.0	71.9	24.4	55.4	32.8	23.0	34.8
7	1873	20 Jul	39.9	47.5	10.7	33.5	27.7	57.7	53.6
6	2021**	19 Mar	54.4	47.6	110.4	28.4	46.8	19.4
	2003	13 May	37.6	57.8	44.0	34.8	30.6	10.2
	2003	21 Nov	11.6	15.6	13.4	16.6	11.0	18.6
	1996	1 May	17.2	15.4	15.8	23.0	27.4	16.8
	1990	7 Feb	59.0	20.0	14.8	10.6	56.8	33.6
	1985	27 Apr	17.2	47.8	34.4	13.0	10.2	22.2
	1960	15 Dec	10.9	24.1	55.1	16.0	41.1	11.9
	1943	20 May	69.3	20.3	12.4	11.4	25.9	18.3
	1938	20 Aug	11.4	39.9	39.4	43.2	20.1	38.1
	1920	8 Dec	27.4	49.8	105.2	29.5	55.1	58.9
	1913	9 Jun	15.0	29.7	37.3	58.9	28.2	14.0
	1876	11 Apr	10.9	12.4	34.0	42.9	13.7	12.4
	1867	24 Apr	10.9	20.8	19.8	24.6	15.5	17.8
	1860	9 Feb	75.7	29.5	60.7	22.1	42.2	10.4

**  on 17^th 13.4 & 18^th 9.8 mm so 8 days  over 9.8 mm

** from 2-13 April 1988, 10 out of 11  days > 10 mm

*** from 17 Jul  2022, 6  days over 10 mm and the other 9.8 mm

 

Consecutive days with > 8 mm of rain

No. Days	Year	Start Date	Rainfall amounts
16	2022	22 Feb	8.2	105.2	44.4	24,4	49.8	22.0	13.2	34.6
			25.2	50..8	19.6	8.6	33.8	31.4	95.4	50.8
10	1908	31 Jul	20.8	23.1	37.3	33.3	36.8	10.4	10.9	11.2
			16.3	14.7
9	1916	27 Oct	8.6	21.3	47.2	28.4	36.1	26.2	21.1	46.7
			86.9

 

Other Consecutive wet spells of note

Year	Dates	Phenomenon
1908	28 Jul to 9 Aug	12 out of 13 days  > 10 mm
1916	28 Oct to 5 Nov	8 consecutive days with > 20 mm
2021	13-24 Mar	10 out of 12  > 10 mm with 9.8 mm on one day. 9 out of 11 a>  20 mm
1943	15 to 25 May	10 out of 11 days  > 10 mm
1985	22 Apr to 2 May
1990	2 to 12 Feb
1950	7 to 19 June 8 to 18 June	11 out of 13 days > 10 mm 9 out of 11 days > 25 mm
1988	3 April to 12 April	10 out of 11 days > 10 mm
2022	23 Feb  to 9 Mar	14 days out of 15 > 10 mm & > 13 mm
2022	1 Mar  to 9 Mar	7 out of 9  days > 25 mm

 

 

Sydney has now had  1370.8 mm of the year so far – around 150 mm above its ANNUAL average already.  Even if the next 4 months have just average rainfall this year’s total will end  up the 2^nd wettest year in the last 35 years.

So far in August Sydney has had 389.6  - the 3^rd wettest August in 165 years.

Top rain in the all of Australia  this month is Randwick (in Sydney’s east) with 438 mm, just ahead of Norah Head and Careys Peak (in Barrington Tops)  each with 435 mm while Cronulla and Long Reff in Sydney’s coast have had 413 mm, arounding out 400 mm+ fallss.

 

Don White

donw...@weatherwatch.net.au

Mob: 0417248705

 

[Blair Trewin]

OFFICIAL

Not sure where your 10 out of 14 comes from (I have 7 out of 14, and 9 for the month). 9 days with 20+ mm and 13 with 10+ mm are both records for the second half of the year, as Don says. (Records for any month are 11 and 15 respectively).

 

It's highly unlikely there will be any more 10+ days in the rest of the month.

 

Blair

 

OFFICIAL

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[Don White]

Oops -typo… should have been 10 out of 24   ( from 31 July).

And for the month records of 11 and 25 respectively,  what were  the  dates  for those  occurrences ?

Don

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[Blair Trewin]

OFFICIAL

11 20+ in May 1919, 15 10+ in June 1950 and March 2022.

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[Don White]

Thanks Blair

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