Extreme rain in United States and Mexico, 15 to 20 December 2021

Name: Extreme rain in United States and Mexico, 15 to 20 December 2021
Start: 2021-12-15
End: 2021-12-20
Location: United States, Mexico

Extreme rain in United States and Mexico, 15 to 20 December 2021: 213 records at 210 stations, peak on 18 December 2021. Closed.

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

Key Facts

Extreme rain in United States and Mexico, 15 to 20 December 2021 set or tied 213 station records at 210 stations.
It ran from 15 December 2021 to 20 December 2021 (6 days) and its peak day was 18 December 2021.
Status: closed.
Morrilton set a daily record precipitation of 68.6 mm (2.7 in) on 19 December 2021.
The busiest day was 18 December 2021 with 104 records.
The oldest broken record in the ranked list had stood for 125 years.

Footprint

15 to 20 December 2021

The area covered by Extreme rain in United States and Mexico, 15 to 20 December 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 United States and Mexico, 15 to 20 December 2021: stations that set records in the event
Station	Type	Value	Date
Morrilton	Record daily precipitation	68.6 mm (2.7 in)	2021-12-19
Hibbing Chisholm Hibbing AP	Record daily precipitation	36.6 mm (1.4 in)	2021-12-15
Ozark Beach 2 NNE	Record daily precipitation	109.0 mm (4.3 in)	2021-12-18
Wasola 5N	Record daily precipitation	130.6 mm (5.1 in)	2021-12-18
Round Spring 2SW	Record daily precipitation	85.6 mm (3.4 in)	2021-12-18
Brainerd	Record daily precipitation	45.0 mm (1.8 in)	2021-12-16
McAlester Rgnl AP	Record daily precipitation	49.3 mm (1.9 in)	2021-12-17
Mtn Grove 2 N	Record daily precipitation	75.2 mm (3.0 in)	2021-12-18
Eveleth Wwtp	Record daily precipitation	49.8 mm (2.0 in)	2021-12-16
Alexandria Chandler Fld	Record daily precipitation	25.4 mm (1.0 in)	2021-12-15
W Plains	Record daily precipitation	91.9 mm (3.6 in)	2021-12-18
Tower 2S	Record daily precipitation	32.5 mm (1.3 in)	2021-12-16
Anna 4 N	Record daily precipitation	67.1 mm (2.6 in)	2021-12-18
Salem	Record daily precipitation	55.1 mm (2.2 in)	2021-12-18
Summersville 3 SE	Record daily precipitation	101.6 mm (4.0 in)	2021-12-18
Floodwood 2E	Record daily precipitation	49.8 mm (2.0 in)	2021-12-16
Omaha	Record daily precipitation	95.3 mm (3.8 in)	2021-12-18
Conroe	Record daily precipitation	82.3 mm (3.2 in)	2021-12-18
Centralia	Record daily precipitation	58.9 mm (2.3 in)	2021-12-18
Red Bud 2 S	Record daily precipitation	62.2 mm (2.4 in)	2021-12-18

Records per Day

Peak day 104

Records set or tied each day from 15 December 2021 to 20 December 2021. The most in one day was 104 on 18 December 2021.

Top Records by Margin

Margin over the record replaced

Top records of Extreme rain in United States and Mexico, 15 to 20 December 2021 ranked by margin
Wasola 5N, 12-18	107.5 mm (4.2 in)
Ozark Beach 2 NNE, 12-18	78.0 mm (3.1 in)
Omaha, 12-18	72.4 mm (2.9 in)
W Plains, 12-18	69.8 mm (2.7 in)
Round Spring 2SW, 12-18	63.0 mm (2.5 in)
Morrilton, 12-19	53.1 mm (2.1 in)
Conroe, 12-18	42.2 mm (1.7 in)
Mtn Grove 2 N, 12-18	41.4 mm (1.6 in)
Centralia, 12-18	35.8 mm (1.4 in)
Red Bud 2 S, 12-18	34.3 mm (1.4 in)
McAlester Rgnl AP, 12-17	30.0 mm (1.2 in)
Eveleth Wwtp, 12-16	25.2 mm (1.0 in)
Floodwood 2E, 12-16	22.9 mm (0.9 in)
Anna 4 N, 12-18	21.9 mm (0.9 in)
Alexandria Chandler Fld, 12-15	19.3 mm (0.8 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

213 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 United States and Mexico, 15 to 20 December 2021
Margin (mm)	Years the old record stood
53	87
78	62
13	36
108	62
63	52
16	1
41	62
30	114
25	14
70	31
19	27
22	121
18	96
2	119
19	78
72	26
23	1
42	64
36	31
34	62
44	27
19	110
21	11
10	7
10	75
15	92
18	125
9	125
6	60
48	26
14	92
14	92
50	34
41	26
12	36
43	26
22	72
49	20
9	122
12	36
16	6
39	64
38	56
2	106
10	2
20	7
3	96
37	26
33	26
44	26
24	64
7	1
4	88
7	2
9	2
16	8
13	62
16	28
1	88
13	8
6	36
8	64
5	72
18	48
24	31
10	62
11	7
0	75
4	36
18	31
17	26
1	72
8	56
4	28
16	26
26	26
17	36
16	31
1	60
4	28
4	56
22	26
0	70
19	26
4	58
1	56
9	6
10	6
13	26
4	19
18	26
17	31
7	20
0	56
32	26
21	26
4	60
0	54
9	56
15	26
14	31
1	51
4	18
12	26
2	40
8	48
19	26
7	7
2	2
6	31
1	36
3	44
5	8
6	31
12	26
0	44
2	48
22	26
20	26
4	8
5	7
5	7
17	26
1	36
26	26
19	26
1	51
2	44
11	19
7	7
0	36
7	26
2	36
12	31
5	48
5	31
10	36
13	19
5	20
3	26
6	31
3	19
1	44
15	7
1	36
2	27
13	23
0	28
4	11
7	26
4	26
9	26
2	31
2	18
5	24
5	7
6	30
10	7
14	26
1	26
4	31
4	31
3	7
2	35
12	26
4	36
2	20
6	26
6	7
16	7
4	19
3	11
3	8
2	19
2	34
22	7
2	26
8	26
6	8
0	34
5	12
20	7
12	7
10	3
1	7
2	7
5	4
5	26
2	20
2	6
4	8
10	2
1	6
7	10
4	4
1	27
3	23
8	7
7	7
3	4

Compared With Other Events

Station records per event

Station records in Extreme rain in United States and Mexico, 15 to 20 December 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 United States and Mexico, 15 to 20 December 2021 (this event)	213 records

Every Record Set

20 of 213

Every record set or tied during Extreme rain in United States and Mexico, 15 to 20 December 2021, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2021-12-15	Hibbing Chisholm Hibbing AP	Record daily precipitation	36.6 mm (1.4 in)	13.0 mm (0.5 in)	36	67 of 100 (Major)
2021-12-15	Alexandria Chandler Fld	Record daily precipitation	25.4 mm (1.0 in)	19.3 mm (0.8 in)	27	56 of 100 (Notable)
2021-12-16	Brainerd	Record daily precipitation	45.0 mm (1.8 in)	16.0 mm (0.6 in)	1	58 of 100 (Notable)
2021-12-16	Eveleth Wwtp	Record daily precipitation	49.8 mm (2.0 in)	25.2 mm (1.0 in)	14	57 of 100 (Notable)
2021-12-16	Tower 2S	Record daily precipitation	32.5 mm (1.3 in)	2.0 mm (0.08 in)	119	55 of 100 (Notable)
2021-12-16	Floodwood 2E	Record daily precipitation	49.8 mm (2.0 in)	22.9 mm (0.9 in)	1	53 of 100 (Notable)
2021-12-17	McAlester Rgnl AP	Record daily precipitation	49.3 mm (1.9 in)	30.0 mm (1.2 in)	114	58 of 100 (Notable)
2021-12-18	Ozark Beach 2 NNE	Record daily precipitation	109.0 mm (4.3 in)	78.0 mm (3.1 in)	62	67 of 100 (Major)
2021-12-18	Wasola 5N	Record daily precipitation	130.6 mm (5.1 in)	107.5 mm (4.2 in)	62	66 of 100 (Major)
2021-12-18	Round Spring 2SW	Record daily precipitation	85.6 mm (3.4 in)	63.0 mm (2.5 in)	52	63 of 100 (Major)
2021-12-18	Mtn Grove 2 N	Record daily precipitation	75.2 mm (3.0 in)	41.4 mm (1.6 in)	62	58 of 100 (Notable)
2021-12-18	W Plains	Record daily precipitation	91.9 mm (3.6 in)	69.8 mm (2.7 in)	31	56 of 100 (Notable)
2021-12-18	Anna 4 N	Record daily precipitation	67.1 mm (2.6 in)	21.9 mm (0.9 in)	121	55 of 100 (Notable)
2021-12-18	Salem	Record daily precipitation	55.1 mm (2.2 in)	18.3 mm (0.7 in)	96	55 of 100 (Notable)
2021-12-18	Summersville 3 SE	Record daily precipitation	101.6 mm (4.0 in)	18.8 mm (0.7 in)	78	54 of 100 (Notable)
2021-12-18	Omaha	Record daily precipitation	95.3 mm (3.8 in)	72.4 mm (2.9 in)	26	53 of 100 (Notable)
2021-12-18	Conroe	Record daily precipitation	82.3 mm (3.2 in)	42.2 mm (1.7 in)	64	53 of 100 (Notable)
2021-12-18	Centralia	Record daily precipitation	58.9 mm (2.3 in)	35.8 mm (1.4 in)	31	52 of 100 (Notable)
2021-12-18	Red Bud 2 S	Record daily precipitation	62.2 mm (2.4 in)	34.3 mm (1.4 in)	62	51 of 100 (Notable)
2021-12-19	Morrilton	Record daily precipitation	68.6 mm (2.7 in)	53.1 mm (2.1 in)	87	68 of 100 (Major)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 213 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
53	87
78	62
13	36
108	62
63	52
16	1
41	62
30	114
25	14
70	31
19	27
22	121
18	96
2	119
19	78
72	26
23	1
42	64
36	31
34	62
44	27
19	110
21	11
10	7
10	75
15	92
18	125
9	125
6	60
48	26
14	92
14	92
50	34
41	26
12	36
43	26
22	72
49	20
9	122
12	36
16	6
39	64
38	56
2	106
10	2
20	7
3	96
37	26
33	26
44	26
24	64
7	1
4	88
7	2
9	2
16	8
13	62
16	28
1	88
13	8
6	36
8	64
5	72
18	48
24	31
10	62
11	7
0	75
4	36
18	31
17	26
1	72
8	56
4	28
16	26
26	26
17	36
16	31
1	60
4	28
4	56
22	26
0	70
19	26
4	58
1	56
9	6
10	6
13	26
4	19
18	26
17	31
7	20
0	56
32	26
21	26
4	60
0	54
9	56
15	26
14	31
1	51
4	18
12	26
2	40
8	48
19	26
7	7
2	2
6	31
1	36
3	44
5	8
6	31
12	26
0	44
2	48
22	26
20	26
4	8
5	7
5	7
17	26
1	36
26	26
19	26
1	51
2	44
11	19
7	7
0	36
7	26
2	36
12	31
5	48
5	31
10	36
13	19
5	20
3	26
6	31
3	19
1	44
15	7
1	36
2	27
13	23
0	28
4	11
7	26
4	26
9	26
2	31
2	18
5	24
5	7
6	30
10	7
14	26
1	26
4	31
4	31
3	7
2	35
12	26
4	36
2	20
6	26
6	7
16	7
4	19
3	11
3	8
2	19
2	34
22	7
2	26
8	26
6	8
0	34
5	12
20	7
12	7
10	3
1	7
2	7
5	4
5	26
2	20
2	6
4	8
10	2
1	6
7	10
4	4
1	27
3	23
8	7
7	7
3	4

Margin (mm)	Years the old record stood
53	87
78	62
13	36
108	62
63	52
16	1
41	62
30	114
25	14
70	31
19	27
22	121
18	96
2	119
19	78
72	26
23	1
42	64
36	31
34	62
44	27
19	110
21	11
10	7
10	75
15	92
18	125
9	125
6	60
48	26
14	92
14	92
50	34
41	26
12	36
43	26
22	72
49	20
9	122
12	36
16	6
39	64
38	56
2	106
10	2
20	7
3	96
37	26
33	26
44	26
24	64
7	1
4	88
7	2
9	2
16	8
13	62
16	28
1	88
13	8
6	36
8	64
5	72
18	48
24	31
10	62
11	7
0	75
4	36
18	31
17	26
1	72
8	56
4	28
16	26
26	26
17	36
16	31
1	60
4	28
4	56
22	26
0	70
19	26
4	58
1	56
9	6
10	6
13	26
4	19
18	26
17	31
7	20
0	56
32	26
21	26
4	60
0	54
9	56
15	26
14	31
1	51
4	18
12	26
2	40
8	48
19	26
7	7
2	2
6	31
1	36
3	44
5	8
6	31
12	26
0	44
2	48
22	26
20	26
4	8
5	7
5	7
17	26
1	36
26	26
19	26
1	51
2	44
11	19
7	7
0	36
7	26
2	36
12	31
5	48
5	31
10	36
13	19
5	20
3	26
6	31
3	19
1	44
15	7
1	36
2	27
13	23
0	28
4	11
7	26
4	26
9	26
2	31
2	18
5	24
5	7
6	30
10	7
14	26
1	26
4	31
4	31
3	7
2	35
12	26
4	36
2	20
6	26
6	7
16	7
4	19
3	11
3	8
2	19
2	34
22	7
2	26
8	26
6	8
0	34
5	12
20	7
12	7
10	3
1	7
2	7
5	4
5	26
2	20
2	6
4	8
10	2
1	6
7	10
4	4
1	27
3	23
8	7
7	7
3	4

Margin (mm)	Years the old record stood
53	87
78	62
13	36
108	62
63	52
16	1
41	62
30	114
25	14
70	31
19	27
22	121
18	96
2	119
19	78
72	26
23	1
42	64
36	31
34	62
44	27
19	110
21	11
10	7
10	75
15	92
18	125
9	125
6	60
48	26
14	92
14	92
50	34
41	26
12	36
43	26
22	72
49	20
9	122
12	36
16	6
39	64
38	56
2	106
10	2
20	7
3	96
37	26
33	26
44	26
24	64
7	1
4	88
7	2
9	2
16	8
13	62
16	28
1	88
13	8
6	36
8	64
5	72
18	48
24	31
10	62
11	7
0	75
4	36
18	31
17	26
1	72
8	56
4	28
16	26
26	26
17	36
16	31
1	60
4	28
4	56
22	26
0	70
19	26
4	58
1	56
9	6
10	6
13	26
4	19
18	26
17	31
7	20
0	56
32	26
21	26
4	60
0	54
9	56
15	26
14	31
1	51
4	18
12	26
2	40
8	48
19	26
7	7
2	2
6	31
1	36
3	44
5	8
6	31
12	26
0	44
2	48
22	26
20	26
4	8
5	7
5	7
17	26
1	36
26	26
19	26
1	51
2	44
11	19
7	7
0	36
7	26
2	36
12	31
5	48
5	31
10	36
13	19
5	20
3	26
6	31
3	19
1	44
15	7
1	36
2	27
13	23
0	28
4	11
7	26
4	26
9	26
2	31
2	18
5	24
5	7
6	30
10	7
14	26
1	26
4	31
4	31
3	7
2	35
12	26
4	36
2	20
6	26
6	7
16	7
4	19
3	11
3	8
2	19
2	34
22	7
2	26
8	26
6	8
0	34
5	12
20	7
12	7
10	3
1	7
2	7
5	4
5	26
2	20
2	6
4	8
10	2
1	6
7	10
4	4
1	27
3	23
8	7
7	7
3	4