Extreme rain in United States and Mexico, 17 to 29 September 2018

Name: Extreme rain in United States and Mexico, 17 to 29 September 2018
Start: 2018-09-17
End: 2018-09-29
Location: United States, Mexico

Extreme rain in United States and Mexico, 17 to 29 September 2018: 872 records at 768 stations, peak on 20 September 2018. Closed.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Key Facts

Extreme rain in United States and Mexico, 17 to 29 September 2018 set or tied 872 station records at 768 stations.
It ran from 17 September 2018 to 29 September 2018 (13 days) and its peak day was 20 September 2018.
Status: closed.
Pontotoc 1N set an all-time record daily precipitation of 329.7 mm (13.0 in) on 22 September 2018.
The busiest day was 20 September 2018 with 170 records.
The oldest broken record in the ranked list had stood for 127 years.

Footprint

17 to 29 September 2018

The area covered by Extreme rain in United States and Mexico, 17 to 29 September 2018 is outlined, with 19 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Extreme rain in United States and Mexico, 17 to 29 September 2018: stations that set records in the event
Station	Type	Value	Date
Pontotoc 1N	Record daily precipitation	329.7 mm (13.0 in)	2018-09-22
Arivaca	Record daily precipitation	62.2 mm (2.4 in)	2018-09-20
Sheldon	Record daily precipitation	134.6 mm (5.3 in)	2018-09-20
Arlington Six Flags	Record daily precipitation	185.4 mm (7.3 in)	2018-09-22
Forest City 2 NNE	Record daily precipitation	109.7 mm (4.3 in)	2018-09-20
Menno	Record daily precipitation	74.7 mm (2.9 in)	2018-09-20
Aspermont	Record daily precipitation	97.5 mm (3.8 in)	2018-09-22
Newell	Record daily precipitation	53.3 mm (2.1 in)	2018-09-20
Chandler	Record daily precipitation	99.1 mm (3.9 in)	2018-09-22
Bonham 3NNE	Record daily precipitation	265.9 mm (10.5 in)	2018-09-22
Rock Rapids	Record daily precipitation	88.9 mm (3.5 in)	2018-09-20
Fayette	Record daily precipitation	94.0 mm (3.7 in)	2018-09-20
Spencer 1 N	Record daily precipitation	99.8 mm (3.9 in)	2018-09-20
Spirit Lake	Record daily precipitation	97.8 mm (3.9 in)	2018-09-20
Milford 4 NW	Record daily precipitation	74.9 mm (2.9 in)	2018-09-20
Mullen 3S	Record daily precipitation	68.3 mm (2.7 in)	2018-09-20
Frisco	Record daily precipitation	223.3 mm (8.8 in)	2018-09-22
Marion	Record daily precipitation	89.7 mm (3.5 in)	2018-09-20
Lake Park 3SSE	Record daily precipitation	100.3 mm (3.9 in)	2018-09-20

Records per Day

Peak day 170

Records set or tied each day from 17 September 2018 to 29 September 2018. The most in one day was 170 on 20 September 2018.

Records per day during Extreme rain in United States and Mexico, 17 to 29 September 2018
Date	Records
2018-09-17	1
2018-09-18	18
2018-09-19	32
2018-09-20	170
2018-09-21	122
2018-09-22	105
2018-09-23	70
2018-09-24	58
2018-09-25	85
2018-09-26	95
2018-09-27	53
2018-09-28	62
2018-09-29	1

Top Records by Margin

Margin over the record replaced

Top records of Extreme rain in United States and Mexico, 17 to 29 September 2018 ranked by margin
Pontotoc 1N, 09-22	176.5 mm (6.9 in)
Frisco, 09-22	96.0 mm (3.8 in)
Spirit Lake, 09-20	87.1 mm (3.4 in)
Bonham 3NNE, 09-22	84.3 mm (3.3 in)
Arlington Six Flags, 09-22	77.4 mm (3.0 in)
Forest City 2 NNE, 09-20	69.8 mm (2.7 in)
Sheldon, 09-20	69.1 mm (2.7 in)
Chandler, 09-22	66.1 mm (2.6 in)
Lake Park 3SSE, 09-20	66.0 mm (2.6 in)
Milford 4 NW, 09-21	64.0 mm (2.5 in)
Marion, 09-20	63.0 mm (2.5 in)
Aspermont, 09-22	56.9 mm (2.2 in)
Arivaca, 09-20	56.1 mm (2.2 in)
Rock Rapids, 09-20	50.8 mm (2.0 in)
Spencer 1 N, 09-20	46.5 mm (1.8 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

500 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, 17 to 29 September 2018
Margin (mm)	Years the old record stood
177	48
56	100
69	116
77	69
70	95
44	116
57	103
66	104
42	84
84	51
51	95
43	95
47	95
87	64
47	95
39	68
96	44
64	57
63	56
66	53
47	93
53	68
56	117
44	69
53	68
179	63
28	69
98	47
79	47
42	56
87	59
58	45
31	48
18	108
36	55
36	87
69	43
75	43
36	117
105	33
86	48
79	43
42	40
55	40
71	57
25	63
39	84
113	43
74	52
26	95
14	109
46	47
61	63
34	99
62	27
54	67
28	29
36	60
73	24
32	76
38	18
71	12
25	111
26	111
33	69
17	104
47	33
27	87
82	24
64	7
67	11
87	8
37	14
52	76
68	47
51	11
15	93
34	12
18	116
34	53
69	27
47	35
19	77
14	92
12	81
32	44
126	16
9	111
47	48
17	104
10	100
27	51
18	95
20	72
56	12
48	60
96	7
52	51
48	43
9	100
67	20
38	21
8	117
40	24
39	67
23	56
47	48
12	117
75	8
65	24
14	116
12	127
24	45
37	37
39	32
15	48
17	48
49	48
11	116
20	81
68	23
41	63
61	23
22	67
61	12
8	105
7	116
48	25
40	11
19	47
33	21
57	28
14	93
5	112
4	108
49	28
27	41
30	40
4	100
15	76
13	91
17	40
28	40
35	24
20	44
35	12
6	116
26	1
24	21
31	32
26	63
59	48
11	61
28	43
18	80
26	41
5	124
40	33
32	36
35	52
38	19
4	108
6	104
36	48
3	104
7	95
38	63
35	52
38	24
2	116
4	104
20	77
37	24
18	47
20	43
4	93
6	87
26	60
20	59
17	56
28	32
0	108
17	63
6	92
11	59
3	93
33	32
60	15
17	72
5	92
62	20
1	104
51	21
12	76
30	29
37	43
16	56
1	93
17	72
8	67

Compared With Other Events

Station records per event

Station records in Extreme rain in United States and Mexico, 17 to 29 September 2018 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, 17 to 29 September 2018 (this event)	872 records

Every Record Set

20 of 872

Every record set or tied during Extreme rain in United States and Mexico, 17 to 29 September 2018, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2018-09-20	Arivaca	Record daily precipitation	62.2 mm (2.4 in)	56.1 mm (2.2 in)	100	80 of 100 (Exceptional)
2018-09-20	Sheldon	Record daily precipitation	134.6 mm (5.3 in)	69.1 mm (2.7 in)	116	80 of 100 (Exceptional)
2018-09-20	Forest City 2 NNE	Record daily precipitation	109.7 mm (4.3 in)	69.8 mm (2.7 in)	95	78 of 100 (Major)
2018-09-20	Menno	Record daily precipitation	74.7 mm (2.9 in)	44.2 mm (1.7 in)	116	75 of 100 (Major)
2018-09-20	Newell	Record daily precipitation	53.3 mm (2.1 in)	42.4 mm (1.7 in)	84	74 of 100 (Major)
2018-09-20	Rock Rapids	Record daily precipitation	88.9 mm (3.5 in)	50.8 mm (2.0 in)	95	72 of 100 (Major)
2018-09-20	Fayette	Record daily precipitation	94.0 mm (3.7 in)	43.2 mm (1.7 in)	95	70 of 100 (Major)
2018-09-20	Spencer 1 N	Record daily precipitation	99.8 mm (3.9 in)	46.5 mm (1.8 in)	95	70 of 100 (Major)
2018-09-20	Spirit Lake	Record daily precipitation	97.8 mm (3.9 in)	87.1 mm (3.4 in)	64	69 of 100 (Major)
2018-09-20	Milford 4 NW	Record daily precipitation	74.9 mm (2.9 in)	46.5 mm (1.8 in)	95	68 of 100 (Major)
2018-09-20	Mullen 3S	Record daily precipitation	68.3 mm (2.7 in)	38.6 mm (1.5 in)	68	68 of 100 (Major)
2018-09-20	Marion	Record daily precipitation	89.7 mm (3.5 in)	63.0 mm (2.5 in)	56	67 of 100 (Major)
2018-09-20	Lake Park 3SSE	Record daily precipitation	100.3 mm (3.9 in)	66.0 mm (2.6 in)	53	66 of 100 (Major)
2018-09-21	Milford 4 NW	Record daily precipitation	114.3 mm (4.5 in)	64.0 mm (2.5 in)	57	67 of 100 (Major)
2018-09-22	Pontotoc 1N	Record daily precipitation	329.7 mm (13.0 in)	176.5 mm (6.9 in)	48	81 of 100 (Exceptional)
2018-09-22	Arlington Six Flags	Record daily precipitation	185.4 mm (7.3 in)	77.4 mm (3.0 in)	69	80 of 100 (Exceptional)
2018-09-22	Aspermont	Record daily precipitation	97.5 mm (3.8 in)	56.9 mm (2.2 in)	103	75 of 100 (Major)
2018-09-22	Chandler	Record daily precipitation	99.1 mm (3.9 in)	66.1 mm (2.6 in)	104	74 of 100 (Major)
2018-09-22	Bonham 3NNE	Record daily precipitation	265.9 mm (10.5 in)	84.3 mm (3.3 in)	51	73 of 100 (Major)
2018-09-22	Frisco	Record daily precipitation	223.3 mm (8.8 in)	96.0 mm (3.8 in)	44	68 of 100 (Major)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 872 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 2026-10-12. 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
177	48
56	100
69	116
77	69
70	95
44	116
57	103
66	104
42	84
84	51
51	95
43	95
47	95
87	64
47	95
39	68
96	44
64	57
63	56
66	53
47	93
53	68
56	117
44	69
53	68
179	63
28	69
98	47
79	47
42	56
87	59
58	45
31	48
18	108
36	55
36	87
69	43
75	43
36	117
105	33
86	48
79	43
42	40
55	40
71	57
25	63
39	84
113	43
74	52
26	95
14	109
46	47
61	63
34	99
62	27
54	67
28	29
36	60
73	24
32	76
38	18
71	12
25	111
26	111
33	69
17	104
47	33
27	87
82	24
64	7
67	11
87	8
37	14
52	76
68	47
51	11
15	93
34	12
18	116
34	53
69	27
47	35
19	77
14	92
12	81
32	44
126	16
9	111
47	48
17	104
10	100
27	51
18	95
20	72
56	12
48	60
96	7
52	51
48	43
9	100
67	20
38	21
8	117
40	24
39	67
23	56
47	48
12	117
75	8
65	24
14	116
12	127
24	45
37	37
39	32
15	48
17	48
49	48
11	116
20	81
68	23
41	63
61	23
22	67
61	12
8	105
7	116
48	25
40	11
19	47
33	21
57	28
14	93
5	112
4	108
49	28
27	41
30	40
4	100
15	76
13	91
17	40
28	40
35	24
20	44
35	12
6	116
26	1
24	21
31	32
26	63
59	48
11	61
28	43
18	80
26	41
5	124
40	33
32	36
35	52
38	19
4	108
6	104
36	48
3	104
7	95
38	63
35	52
38	24
2	116
4	104
20	77
37	24
18	47
20	43
4	93
6	87
26	60
20	59
17	56
28	32
0	108
17	63
6	92
11	59
3	93
33	32
60	15
17	72
5	92
62	20
1	104
51	21
12	76
30	29
37	43
16	56
1	93
17	72
8	67

Margin (mm)	Years the old record stood
177	48
56	100
69	116
77	69
70	95
44	116
57	103
66	104
42	84
84	51
51	95
43	95
47	95
87	64
47	95
39	68
96	44
64	57
63	56
66	53
47	93
53	68
56	117
44	69
53	68
179	63
28	69
98	47
79	47
42	56
87	59
58	45
31	48
18	108
36	55
36	87
69	43
75	43
36	117
105	33
86	48
79	43
42	40
55	40
71	57
25	63
39	84
113	43
74	52
26	95
14	109
46	47
61	63
34	99
62	27
54	67
28	29
36	60
73	24
32	76
38	18
71	12
25	111
26	111
33	69
17	104
47	33
27	87
82	24
64	7
67	11
87	8
37	14
52	76
68	47
51	11
15	93
34	12
18	116
34	53
69	27
47	35
19	77
14	92
12	81
32	44
126	16
9	111
47	48
17	104
10	100
27	51
18	95
20	72
56	12
48	60
96	7
52	51
48	43
9	100
67	20
38	21
8	117
40	24
39	67
23	56
47	48
12	117
75	8
65	24
14	116
12	127
24	45
37	37
39	32
15	48
17	48
49	48
11	116
20	81
68	23
41	63
61	23
22	67
61	12
8	105
7	116
48	25
40	11
19	47
33	21
57	28
14	93
5	112
4	108
49	28
27	41
30	40
4	100
15	76
13	91
17	40
28	40
35	24
20	44
35	12
6	116
26	1
24	21
31	32
26	63
59	48
11	61
28	43
18	80
26	41
5	124
40	33
32	36
35	52
38	19
4	108
6	104
36	48
3	104
7	95
38	63
35	52
38	24
2	116
4	104
20	77
37	24
18	47
20	43
4	93
6	87
26	60
20	59
17	56
28	32
0	108
17	63
6	92
11	59
3	93
33	32
60	15
17	72
5	92
62	20
1	104
51	21
12	76
30	29
37	43
16	56
1	93
17	72
8	67

Margin (mm)	Years the old record stood
177	48
56	100
69	116
77	69
70	95
44	116
57	103
66	104
42	84
84	51
51	95
43	95
47	95
87	64
47	95
39	68
96	44
64	57
63	56
66	53
47	93
53	68
56	117
44	69
53	68
179	63
28	69
98	47
79	47
42	56
87	59
58	45
31	48
18	108
36	55
36	87
69	43
75	43
36	117
105	33
86	48
79	43
42	40
55	40
71	57
25	63
39	84
113	43
74	52
26	95
14	109
46	47
61	63
34	99
62	27
54	67
28	29
36	60
73	24
32	76
38	18
71	12
25	111
26	111
33	69
17	104
47	33
27	87
82	24
64	7
67	11
87	8
37	14
52	76
68	47
51	11
15	93
34	12
18	116
34	53
69	27
47	35
19	77
14	92
12	81
32	44
126	16
9	111
47	48
17	104
10	100
27	51
18	95
20	72
56	12
48	60
96	7
52	51
48	43
9	100
67	20
38	21
8	117
40	24
39	67
23	56
47	48
12	117
75	8
65	24
14	116
12	127
24	45
37	37
39	32
15	48
17	48
49	48
11	116
20	81
68	23
41	63
61	23
22	67
61	12
8	105
7	116
48	25
40	11
19	47
33	21
57	28
14	93
5	112
4	108
49	28
27	41
30	40
4	100
15	76
13	91
17	40
28	40
35	24
20	44
35	12
6	116
26	1
24	21
31	32
26	63
59	48
11	61
28	43
18	80
26	41
5	124
40	33
32	36
35	52
38	19
4	108
6	104
36	48
3	104
7	95
38	63
35	52
38	24
2	116
4	104
20	77
37	24
18	47
20	43
4	93
6	87
26	60
20	59
17	56
28	32
0	108
17	63
6	92
11	59
3	93
33	32
60	15
17	72
5	92
62	20
1	104
51	21
12	76
30	29
37	43
16	56
1	93
17	72
8	67