Extreme rain in Australia, 16 to 20 April 2021

Name: Extreme rain in Australia, 16 to 20 April 2021
Start: 2021-04-16
End: 2021-04-20
Location: Australia

Extreme rain in Australia, 16 to 20 April 2021: 117 records at 110 stations, peak on 18 April 2021. Closed.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Key Facts

Extreme rain in Australia, 16 to 20 April 2021 set or tied 117 station records at 110 stations.
It ran from 16 April 2021 to 20 April 2021 (5 days) and its peak day was 18 April 2021.
Status: closed.
Walcha (Karori) set a daily record precipitation of 35.0 mm (1.4 in) on 18 April 2021.
The busiest day was 18 April 2021 with 89 records.
The oldest broken record in the ranked list had stood for 112 years.

Footprint

16 to 20 April 2021

The area covered by Extreme rain in Australia, 16 to 20 April 2021 is outlined, with 20 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Extreme rain in Australia, 16 to 20 April 2021: stations that set records in the event
Station	Type	Value	Date
Walcha (Karori)	Record daily precipitation	35.0 mm (1.4 in)	2021-04-18
Walcha (Emu Creek)	Record daily precipitation	30.4 mm (1.2 in)	2021-04-18
Ebor (Wongwibinda)	Record daily precipitation	34.0 mm (1.3 in)	2021-04-18
Coramba (Glenfiddich)	Record daily precipitation	115.6 mm (4.6 in)	2021-04-17
Dundee (Wattle Dale)	Record daily precipitation	30.0 mm (1.2 in)	2021-04-18
Elsmore (Danthonia)	Record daily precipitation	27.5 mm (1.1 in)	2021-04-18
Bundarra (Araluen)	Record daily precipitation	59.0 mm (2.3 in)	2021-04-20
Uralla (Mihi)	Record daily precipitation	36.2 mm (1.4 in)	2021-04-18
Uralla (Blue Nobby)	Record daily precipitation	25.0 mm (1.0 in)	2021-04-18
Glen Morrison (Branga Plains)	Record daily precipitation	38.0 mm (1.5 in)	2021-04-17
Talwood State School	Record daily precipitation	20.0 mm (0.8 in)	2021-04-17
Willow Tree (Cooinda)	Record daily precipitation	19.4 mm (0.8 in)	2021-04-17
Texas Post Office	Record daily precipitation	16.0 mm (0.6 in)	2021-04-18
Graman (Ulupna)	Record daily precipitation	19.0 mm (0.7 in)	2021-04-18
Attunga (Garthowen)	Record daily precipitation	18.4 mm (0.7 in)	2021-04-18
Danglemah (Rutherglen)	Record daily precipitation	23.0 mm (0.9 in)	2021-04-18
Uralla (Salisbury Court)	Record daily precipitation	20.0 mm (0.8 in)	2021-04-18
Uralla (Dumaresq St)	Record daily precipitation	23.8 mm (0.9 in)	2021-04-18
Walcha Road ( Boxley)	Record daily precipitation	24.6 mm (1.0 in)	2021-04-18
Glen Morrison (Millbank)	Record daily precipitation	17.6 mm (0.7 in)	2021-04-18

Records per Day

Peak day 89

Records set or tied each day from 16 April 2021 to 20 April 2021. The most in one day was 89 on 18 April 2021.

Top Records by Margin

Margin over the record replaced

Top records of Extreme rain in Australia, 16 to 20 April 2021 ranked by margin
Coramba (Glenfiddich), 04-17	80.4 mm (3.2 in)
Dundee (Wattle Dale), 04-18	23.0 mm (0.9 in)
Walcha (Karori), 04-18	22.8 mm (0.9 in)
Glen Morrison (Branga Plains), 04-17	21.5 mm (0.8 in)
Bundarra (Araluen), 04-20	20.8 mm (0.8 in)
Willow Tree (Cooinda), 04-17	19.4 mm (0.8 in)
Walcha (Emu Creek), 04-18	18.8 mm (0.7 in)
Uralla (Mihi), 04-18	18.2 mm (0.7 in)
Elsmore (Danthonia), 04-18	17.3 mm (0.7 in)
Walcha Road ( Boxley), 04-18	15.6 mm (0.6 in)
Uralla (Blue Nobby), 04-18	13.8 mm (0.5 in)
Glen Morrison (Millbank), 04-18	11.6 mm (0.5 in)
Danglemah (Rutherglen), 04-18	8.8 mm (0.35 in)
Attunga (Garthowen), 04-18	7.0 mm (0.28 in)
Uralla (Dumaresq St), 04-18	6.0 mm (0.24 in)

Margin is how far the new value is beyond the record it replaced. Ties are not shown.

Margin Against Age of the Broken Record

117 records plotted by how far they beat the old record (across) and how many years the old record had stood (up). Long standing records beaten by a wide margin sit in the top right.

Margin against age of the broken record in Extreme rain in Australia, 16 to 20 April 2021
Margin (mm)	Years the old record stood
23	70
6	112
19	31
3	112
19	71
23	32
80	11
0	112
17	62
5	88
2	92
4	92
7	70
9	70
16	42
21	31
18	6
14	42
12	42
22	20
11	62
21	22
8	62
12	50
17	42
7	50
6	50
15	42
12	48
5	66
18	8
11	42
17	18
10	42
7	52
3	50
1	50
7	50
7	50
0	59
4	50
8	31
8	42
7	42
3	50
17	4
7	38
4	44
11	20
1	50
11	18
13	28
10	28
3	42
2	31
6	36
9	22
2	42
6	20
4	42
12	8
9	39
12	8
4	16
7	31
11	8
8	20
10	10
1	42
2	22
10	8
21	2
8	31
7	22
1	22
8	8
12	8
9	8
7	8
14	8
9	8
4	22
7	8
7	32
3	23
10	10
4	20
3	23
9	4
5	10
9	8
1	8
2	26
3	18
7	12
0	20
6	10
3	20
3	20
3	8
3	19
5	8
6	8
4	8
3	8
6	10
0	12
3	10
2	8
1	14
2	8
2	8
1	8
0	8
1	8
2	8
3	8

Compared With Other Events

Station records per event

Station records in Extreme rain in Australia, 16 to 20 April 2021 compared with similar events
Extreme rain in United States and Mexico, 23 February to 15 March 2019	2,223 records
Extreme rain in United States, 3 to 19 January 2024	2,133 records
Extreme rain in Australia, 7 to 26 March 2021	2,099 records
Extreme rain in United States and Mexico, 29 September to 19 October 2018	1,970 records
Extreme rain in United States, 19 December 2022 to 13 January 2023	1,941 records
Extreme rain in Australia, 16 to 20 April 2021 (this event)	117 records

Every Record Set

20 of 117

Every record set or tied during Extreme rain in Australia, 16 to 20 April 2021, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2021-04-17	Coramba (Glenfiddich)	Record daily precipitation	115.6 mm (4.6 in)	80.4 mm (3.2 in)	11	41 of 100 (Notable)
2021-04-17	Glen Morrison (Branga Plains)	Record daily precipitation	38.0 mm (1.5 in)	21.5 mm (0.8 in)	20	34 of 100 (Routine)
2021-04-17	Talwood State School	Record daily precipitation	20.0 mm (0.8 in)	4.8 mm (0.19 in)	88	20 of 100 (Routine)
2021-04-17	Willow Tree (Cooinda)	Record daily precipitation	19.4 mm (0.8 in)	19.4 mm (0.8 in)	71	20 of 100 (Routine)
2021-04-18	Walcha (Karori)	Record daily precipitation	35.0 mm (1.4 in)	22.8 mm (0.9 in)	70	58 of 100 (Notable)
2021-04-18	Walcha (Emu Creek)	Record daily precipitation	30.4 mm (1.2 in)	18.8 mm (0.7 in)	31	42 of 100 (Notable)
2021-04-18	Ebor (Wongwibinda)	Record daily precipitation	34.0 mm (1.3 in)	2.8 mm (0.11 in)	112	42 of 100 (Notable)
2021-04-18	Dundee (Wattle Dale)	Record daily precipitation	30.0 mm (1.2 in)	23.0 mm (0.9 in)	32	41 of 100 (Notable)
2021-04-18	Elsmore (Danthonia)	Record daily precipitation	27.5 mm (1.1 in)	17.3 mm (0.7 in)	62	40 of 100 (Notable)
2021-04-18	Uralla (Mihi)	Record daily precipitation	36.2 mm (1.4 in)	18.2 mm (0.7 in)	6	35 of 100 (Notable)
2021-04-18	Uralla (Blue Nobby)	Record daily precipitation	25.0 mm (1.0 in)	13.8 mm (0.5 in)	42	35 of 100 (Notable)
2021-04-18	Texas Post Office	Record daily precipitation	16.0 mm (0.6 in)	2.0 mm (0.08 in)	92	20 of 100 (Routine)
2021-04-18	Graman (Ulupna)	Record daily precipitation	19.0 mm (0.7 in)	3.8 mm (0.15 in)	92	20 of 100 (Routine)
2021-04-18	Attunga (Garthowen)	Record daily precipitation	18.4 mm (0.7 in)	7.0 mm (0.28 in)	70	20 of 100 (Routine)
2021-04-18	Danglemah (Rutherglen)	Record daily precipitation	23.0 mm (0.9 in)	8.8 mm (0.35 in)	70	20 of 100 (Routine)
2021-04-18	Uralla (Salisbury Court)	Record daily precipitation	20.0 mm (0.8 in)	0.2 mm (0.01 in)	112	20 of 100 (Routine)
2021-04-18	Uralla (Dumaresq St)	Record daily precipitation	23.8 mm (0.9 in)	6.0 mm (0.24 in)	112	20 of 100 (Routine)
2021-04-18	Walcha Road ( Boxley)	Record daily precipitation	24.6 mm (1.0 in)	15.6 mm (0.6 in)	42	20 of 100 (Routine)
2021-04-18	Glen Morrison (Millbank)	Record daily precipitation	17.6 mm (0.7 in)	11.6 mm (0.5 in)	42	20 of 100 (Routine)
2021-04-20	Bundarra (Araluen)	Record daily precipitation	59.0 mm (2.3 in)	20.8 mm (0.8 in)	31	36 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 117 records the event counts. The counts above use the full total.

Related Headlines

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Download the Data

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.

Margin (mm)	Years the old record stood
23	70
6	112
19	31
3	112
19	71
23	32
80	11
0	112
17	62
5	88
2	92
4	92
7	70
9	70
16	42
21	31
18	6
14	42
12	42
22	20
11	62
21	22
8	62
12	50
17	42
7	50
6	50
15	42
12	48
5	66
18	8
11	42
17	18
10	42
7	52
3	50
1	50
7	50
7	50
0	59
4	50
8	31
8	42
7	42
3	50
17	4
7	38
4	44
11	20
1	50
11	18
13	28
10	28
3	42
2	31
6	36
9	22
2	42
6	20
4	42
12	8
9	39
12	8
4	16
7	31
11	8
8	20
10	10
1	42
2	22
10	8
21	2
8	31
7	22
1	22
8	8
12	8
9	8
7	8
14	8
9	8
4	22
7	8
7	32
3	23
10	10
4	20
3	23
9	4
5	10
9	8
1	8
2	26
3	18
7	12
0	20
6	10
3	20
3	20
3	8
3	19
5	8
6	8
4	8
3	8
6	10
0	12
3	10
2	8
1	14
2	8
2	8
1	8
0	8
1	8
2	8
3	8

Margin (mm)	Years the old record stood
23	70
6	112
19	31
3	112
19	71
23	32
80	11
0	112
17	62
5	88
2	92
4	92
7	70
9	70
16	42
21	31
18	6
14	42
12	42
22	20
11	62
21	22
8	62
12	50
17	42
7	50
6	50
15	42
12	48
5	66
18	8
11	42
17	18
10	42
7	52
3	50
1	50
7	50
7	50
0	59
4	50
8	31
8	42
7	42
3	50
17	4
7	38
4	44
11	20
1	50
11	18
13	28
10	28
3	42
2	31
6	36
9	22
2	42
6	20
4	42
12	8
9	39
12	8
4	16
7	31
11	8
8	20
10	10
1	42
2	22
10	8
21	2
8	31
7	22
1	22
8	8
12	8
9	8
7	8
14	8
9	8
4	22
7	8
7	32
3	23
10	10
4	20
3	23
9	4
5	10
9	8
1	8
2	26
3	18
7	12
0	20
6	10
3	20
3	20
3	8
3	19
5	8
6	8
4	8
3	8
6	10
0	12
3	10
2	8
1	14
2	8
2	8
1	8
0	8
1	8
2	8
3	8

Margin (mm)	Years the old record stood
23	70
6	112
19	31
3	112
19	71
23	32
80	11
0	112
17	62
5	88
2	92
4	92
7	70
9	70
16	42
21	31
18	6
14	42
12	42
22	20
11	62
21	22
8	62
12	50
17	42
7	50
6	50
15	42
12	48
5	66
18	8
11	42
17	18
10	42
7	52
3	50
1	50
7	50
7	50
0	59
4	50
8	31
8	42
7	42
3	50
17	4
7	38
4	44
11	20
1	50
11	18
13	28
10	28
3	42
2	31
6	36
9	22
2	42
6	20
4	42
12	8
9	39
12	8
4	16
7	31
11	8
8	20
10	10
1	42
2	22
10	8
21	2
8	31
7	22
1	22
8	8
12	8
9	8
7	8
14	8
9	8
4	22
7	8
7	32
3	23
10	10
4	20
3	23
9	4
5	10
9	8
1	8
2	26
3	18
7	12
0	20
6	10
3	20
3	20
3	8
3	19
5	8
6	8
4	8
3	8
6	10
0	12
3	10
2	8
1	14
2	8
2	8
1	8
0	8
1	8
2	8
3	8