Extreme rain in United States, 11 to 18 December 2020

Name: Extreme rain in United States, 11 to 18 December 2020
Start: 2020-12-11
End: 2020-12-18
Location: United States

Extreme rain in United States, 11 to 18 December 2020: 317 records at 309 stations, peak on 17 December 2020. Closed.

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

Key Facts

Extreme rain in United States, 11 to 18 December 2020 set or tied 317 station records at 309 stations.
It ran from 11 December 2020 to 18 December 2020 (8 days) and its peak day was 17 December 2020.
Status: closed.
Wellsboro 4 SW set a daily record precipitation of 47.2 mm (1.9 in) on 17 December 2020.
The busiest day was 17 December 2020 with 95 records.
The oldest broken record in the ranked list had stood for 162 years.

Footprint

11 to 18 December 2020

The area covered by Extreme rain in United States, 11 to 18 December 2020 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, 11 to 18 December 2020: stations that set records in the event
Station	Type	Value	Date
Wellsboro 4 SW	Record daily precipitation	47.2 mm (1.9 in)	2020-12-17
Elmira	Record daily precipitation	48.5 mm (1.9 in)	2020-12-17
Brodhead Wwtp	Record daily precipitation	41.7 mm (1.6 in)	2020-12-12
Lake City 2 E	Record daily precipitation	75.9 mm (3.0 in)	2020-12-17
Washington	Record daily precipitation	30.0 mm (1.2 in)	2020-12-12
Stevenson Dam	Record daily precipitation	54.9 mm (2.2 in)	2020-12-17
Mayo	Record daily precipitation	66.5 mm (2.6 in)	2020-12-17
Renovo	Record daily precipitation	44.5 mm (1.8 in)	2020-12-17
Indiana 3 SE	Record daily precipitation	40.6 mm (1.6 in)	2020-12-17
Greenville 2 NNE	Record daily precipitation	51.3 mm (2.0 in)	2020-12-12
Fairfield	Record daily precipitation	27.9 mm (1.1 in)	2020-12-12
Gatlinburg 2 SW	Record daily precipitation	39.4 mm (1.6 in)	2020-12-14
Augusta	Record daily precipitation	32.5 mm (1.3 in)	2020-12-12
Montague 4 NW	Record daily precipitation	40.9 mm (1.6 in)	2020-12-12
New Boston Dam 17	Record daily precipitation	32.5 mm (1.3 in)	2020-12-12
Robinson	Record daily precipitation	36.8 mm (1.4 in)	2020-12-13
Apalachicola AP	Record daily precipitation	48.5 mm (1.9 in)	2020-12-16
Emmons	Record daily precipitation	50.3 mm (2.0 in)	2020-12-17
Carlisle Wtp	Record daily precipitation	37.6 mm (1.5 in)	2020-12-17
Stevensville 2SW	Record daily precipitation	33.3 mm (1.3 in)	2020-12-17

Records per Day

Peak day 95

Records set or tied each day from 11 December 2020 to 18 December 2020. The most in one day was 95 on 17 December 2020.

Top Records by Margin

Margin over the record replaced

Top records of Extreme rain in United States, 11 to 18 December 2020 ranked by margin
Lake City 2 E, 12-17	53.0 mm (2.1 in)
Mayo, 12-17	51.8 mm (2.0 in)
Stevenson Dam, 12-17	38.6 mm (1.5 in)
Emmons, 12-17	32.3 mm (1.3 in)
Elmira, 12-17	28.2 mm (1.1 in)
Wellsboro 4 SW, 12-17	27.9 mm (1.1 in)
Apalachicola AP, 12-16	25.1 mm (1.0 in)
Augusta, 12-12	24.9 mm (1.0 in)
Renovo, 12-17	23.4 mm (0.9 in)
Indiana 3 SE, 12-17	22.6 mm (0.9 in)
New Boston Dam 17, 12-12	19.3 mm (0.8 in)
Greenville 2 NNE, 12-12	18.3 mm (0.7 in)
Brodhead Wwtp, 12-12	15.5 mm (0.6 in)
Washington, 12-12	15.5 mm (0.6 in)
Montague 4 NW, 12-12	14.2 mm (0.6 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

317 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, 11 to 18 December 2020
Margin (mm)	Years the old record stood
28	50
28	50
16	111
53	55
16	97
39	46
52	40
23	50
23	50
18	48
10	97
13	97
25	59
14	55
25	80
19	59
10	113
32	20
10	162
13	88
13	71
15	46
16	67
5	99
5	129
13	74
4	119
4	120
10	88
8	95
10	71
26	46
5	79
9	74
31	15
22	67
9	71
9	74
14	48
11	67
17	29
1	113
11	59
16	48
10	74
7	55
11	67
15	69
3	92
19	8
22	29
22	6
5	93
11	48
7	59
16	64
2	83
9	50
15	19
6	72
23	29
14	20
19	50
8	48
7	46
11	46
4	67
10	25
16	50
1	74
6	59
2	71
6	59
14	64
13	36
9	53
0	74
10	20
6	67
4	75
18	21
2	72
8	37
11	48
6	48
13	13
20	13
7	24
10	64
6	64
12	46
4	69
9	64
5	48
8	37
9	50
9	46
8	46
26	33
12	28
15	10
10	55
12	15
8	47
22	13
10	47
17	21
6	50
4	46
3	50
18	20
17	30
2	59
9	20
18	39
6	57
7	47
8	55
4	48
1	60
3	46
3	46
4	46
2	59
3	61
5	55
21	20
7	48
2	48
12	20
2	48
5	46
12	45
13	48
3	64
4	47
16	33
8	55
3	50
8	50
3	59
14	20
17	21
10	21
9	33
1	50
8	46
5	50
7	37
5	50
6	20
9	20
0	64
2	46
10	20
3	50
6	44
3	48
3	50
19	20
2	28
15	20
2	50
7	17
15	29
10	6
0	24
20	7
3	47
5	20
12	21
5	37
3	39
1	50
5	20
3	37
13	13
1	48
4	41
3	48
11	10
5	20
8	13
0	46
14	20
6	21
8	17
4	32
13	19
2	38
1	47
6	29
9	29
22	2
2	48
16	7
8	17
9	20
5	20
3	20

Compared With Other Events

Station records per event

Station records in Extreme rain in United States, 11 to 18 December 2020 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, 11 to 18 December 2020 (this event)	317 records

Every Record Set

20 of 317

Every record set or tied during Extreme rain in United States, 11 to 18 December 2020, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2020-12-12	Brodhead Wwtp	Record daily precipitation	41.7 mm (1.6 in)	15.5 mm (0.6 in)	111	62 of 100 (Major)
2020-12-12	Washington	Record daily precipitation	30.0 mm (1.2 in)	15.5 mm (0.6 in)	97	58 of 100 (Notable)
2020-12-12	Greenville 2 NNE	Record daily precipitation	51.3 mm (2.0 in)	18.3 mm (0.7 in)	48	52 of 100 (Notable)
2020-12-12	Fairfield	Record daily precipitation	27.9 mm (1.1 in)	9.6 mm (0.38 in)	97	51 of 100 (Notable)
2020-12-12	Augusta	Record daily precipitation	32.5 mm (1.3 in)	24.9 mm (1.0 in)	59	50 of 100 (Notable)
2020-12-12	Montague 4 NW	Record daily precipitation	40.9 mm (1.6 in)	14.2 mm (0.6 in)	55	50 of 100 (Notable)
2020-12-12	New Boston Dam 17	Record daily precipitation	32.5 mm (1.3 in)	19.3 mm (0.8 in)	59	49 of 100 (Notable)
2020-12-13	Robinson	Record daily precipitation	36.8 mm (1.4 in)	10.1 mm (0.4 in)	113	49 of 100 (Notable)
2020-12-14	Gatlinburg 2 SW	Record daily precipitation	39.4 mm (1.6 in)	13.2 mm (0.5 in)	97	51 of 100 (Notable)
2020-12-16	Apalachicola AP	Record daily precipitation	48.5 mm (1.9 in)	25.1 mm (1.0 in)	80	49 of 100 (Notable)
2020-12-17	Wellsboro 4 SW	Record daily precipitation	47.2 mm (1.9 in)	27.9 mm (1.1 in)	50	64 of 100 (Major)
2020-12-17	Elmira	Record daily precipitation	48.5 mm (1.9 in)	28.2 mm (1.1 in)	50	63 of 100 (Major)
2020-12-17	Lake City 2 E	Record daily precipitation	75.9 mm (3.0 in)	53.0 mm (2.1 in)	55	61 of 100 (Major)
2020-12-17	Stevenson Dam	Record daily precipitation	54.9 mm (2.2 in)	38.6 mm (1.5 in)	46	58 of 100 (Notable)
2020-12-17	Mayo	Record daily precipitation	66.5 mm (2.6 in)	51.8 mm (2.0 in)	40	54 of 100 (Notable)
2020-12-17	Renovo	Record daily precipitation	44.5 mm (1.8 in)	23.4 mm (0.9 in)	50	54 of 100 (Notable)
2020-12-17	Indiana 3 SE	Record daily precipitation	40.6 mm (1.6 in)	22.6 mm (0.9 in)	50	53 of 100 (Notable)
2020-12-17	Emmons	Record daily precipitation	50.3 mm (2.0 in)	32.3 mm (1.3 in)	20	49 of 100 (Notable)
2020-12-17	Carlisle Wtp	Record daily precipitation	37.6 mm (1.5 in)	9.7 mm (0.38 in)	162	48 of 100 (Notable)
2020-12-17	Stevensville 2SW	Record daily precipitation	33.3 mm (1.3 in)	12.5 mm (0.5 in)	88	47 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 317 records the event counts. The counts above use the full total.

Related Headlines

Third party news, headline and link only

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.

Date	Records
2020-12-11	10
2020-12-12	83
2020-12-13	6
2020-12-14	92
2020-12-15	6
2020-12-16	22
2020-12-17	95
2020-12-18	3

Margin (mm)	Years the old record stood
28	50
28	50
16	111
53	55
16	97
39	46
52	40
23	50
23	50
18	48
10	97
13	97
25	59
14	55
25	80
19	59
10	113
32	20
10	162
13	88
13	71
15	46
16	67
5	99
5	129
13	74
4	119
4	120
10	88
8	95
10	71
26	46
5	79
9	74
31	15
22	67
9	71
9	74
14	48
11	67
17	29
1	113
11	59
16	48
10	74
7	55
11	67
15	69
3	92
19	8
22	29
22	6
5	93
11	48
7	59
16	64
2	83
9	50
15	19
6	72
23	29
14	20
19	50
8	48
7	46
11	46
4	67
10	25
16	50
1	74
6	59
2	71
6	59
14	64
13	36
9	53
0	74
10	20
6	67
4	75
18	21
2	72
8	37
11	48
6	48
13	13
20	13
7	24
10	64
6	64
12	46
4	69
9	64
5	48
8	37
9	50
9	46
8	46
26	33
12	28
15	10
10	55
12	15
8	47
22	13
10	47
17	21
6	50
4	46
3	50
18	20
17	30
2	59
9	20
18	39
6	57
7	47
8	55
4	48
1	60
3	46
3	46
4	46
2	59
3	61
5	55
21	20
7	48
2	48
12	20
2	48
5	46
12	45
13	48
3	64
4	47
16	33
8	55
3	50
8	50
3	59
14	20
17	21
10	21
9	33
1	50
8	46
5	50
7	37
5	50
6	20
9	20
0	64
2	46
10	20
3	50
6	44
3	48
3	50
19	20
2	28
15	20
2	50
7	17
15	29
10	6
0	24
20	7
3	47
5	20
12	21
5	37
3	39
1	50
5	20
3	37
13	13
1	48
4	41
3	48
11	10
5	20
8	13
0	46
14	20
6	21
8	17
4	32
13	19
2	38
1	47
6	29
9	29
22	2
2	48
16	7
8	17
9	20
5	20
3	20

Margin (mm)	Years the old record stood
28	50
28	50
16	111
53	55
16	97
39	46
52	40
23	50
23	50
18	48
10	97
13	97
25	59
14	55
25	80
19	59
10	113
32	20
10	162
13	88
13	71
15	46
16	67
5	99
5	129
13	74
4	119
4	120
10	88
8	95
10	71
26	46
5	79
9	74
31	15
22	67
9	71
9	74
14	48
11	67
17	29
1	113
11	59
16	48
10	74
7	55
11	67
15	69
3	92
19	8
22	29
22	6
5	93
11	48
7	59
16	64
2	83
9	50
15	19
6	72
23	29
14	20
19	50
8	48
7	46
11	46
4	67
10	25
16	50
1	74
6	59
2	71
6	59
14	64
13	36
9	53
0	74
10	20
6	67
4	75
18	21
2	72
8	37
11	48
6	48
13	13
20	13
7	24
10	64
6	64
12	46
4	69
9	64
5	48
8	37
9	50
9	46
8	46
26	33
12	28
15	10
10	55
12	15
8	47
22	13
10	47
17	21
6	50
4	46
3	50
18	20
17	30
2	59
9	20
18	39
6	57
7	47
8	55
4	48
1	60
3	46
3	46
4	46
2	59
3	61
5	55
21	20
7	48
2	48
12	20
2	48
5	46
12	45
13	48
3	64
4	47
16	33
8	55
3	50
8	50
3	59
14	20
17	21
10	21
9	33
1	50
8	46
5	50
7	37
5	50
6	20
9	20
0	64
2	46
10	20
3	50
6	44
3	48
3	50
19	20
2	28
15	20
2	50
7	17
15	29
10	6
0	24
20	7
3	47
5	20
12	21
5	37
3	39
1	50
5	20
3	37
13	13
1	48
4	41
3	48
11	10
5	20
8	13
0	46
14	20
6	21
8	17
4	32
13	19
2	38
1	47
6	29
9	29
22	2
2	48
16	7
8	17
9	20
5	20
3	20

Margin (mm)	Years the old record stood
28	50
28	50
16	111
53	55
16	97
39	46
52	40
23	50
23	50
18	48
10	97
13	97
25	59
14	55
25	80
19	59
10	113
32	20
10	162
13	88
13	71
15	46
16	67
5	99
5	129
13	74
4	119
4	120
10	88
8	95
10	71
26	46
5	79
9	74
31	15
22	67
9	71
9	74
14	48
11	67
17	29
1	113
11	59
16	48
10	74
7	55
11	67
15	69
3	92
19	8
22	29
22	6
5	93
11	48
7	59
16	64
2	83
9	50
15	19
6	72
23	29
14	20
19	50
8	48
7	46
11	46
4	67
10	25
16	50
1	74
6	59
2	71
6	59
14	64
13	36
9	53
0	74
10	20
6	67
4	75
18	21
2	72
8	37
11	48
6	48
13	13
20	13
7	24
10	64
6	64
12	46
4	69
9	64
5	48
8	37
9	50
9	46
8	46
26	33
12	28
15	10
10	55
12	15
8	47
22	13
10	47
17	21
6	50
4	46
3	50
18	20
17	30
2	59
9	20
18	39
6	57
7	47
8	55
4	48
1	60
3	46
3	46
4	46
2	59
3	61
5	55
21	20
7	48
2	48
12	20
2	48
5	46
12	45
13	48
3	64
4	47
16	33
8	55
3	50
8	50
3	59
14	20
17	21
10	21
9	33
1	50
8	46
5	50
7	37
5	50
6	20
9	20
0	64
2	46
10	20
3	50
6	44
3	48
3	50
19	20
2	28
15	20
2	50
7	17
15	29
10	6
0	24
20	7
3	47
5	20
12	21
5	37
3	39
1	50
5	20
3	37
13	13
1	48
4	41
3	48
11	10
5	20
8	13
0	46
14	20
6	21
8	17
4	32
13	19
2	38
1	47
6	29
9	29
22	2
2	48
16	7
8	17
9	20
5	20
3	20