Extreme rain in United States and Mexico, 29 September to 19 October 2018

Name: Extreme rain in United States and Mexico, 29 September to 19 October 2018
Start: 2018-09-29
End: 2018-10-19
Location: United States, Mexico

Extreme rain in United States and Mexico, 29 September to 19 October 2018: 1,970 records at 1,501 stations, peak on 9 October 2018. Closed.

Data as of 2026-10-18. Last revised 18 October 2026 (2026-10-18).

Key Facts

Extreme rain in United States and Mexico, 29 September to 19 October 2018 set or tied 1,970 station records at 1,501 stations.
It ran from 29 September 2018 to 19 October 2018 (21 days) and its peak day was 9 October 2018.
Status: closed.
Wallowa set a daily record precipitation of 34.8 mm (1.4 in) on 9 October 2018.
The busiest day was 9 October 2018 with 345 records.
The oldest broken record in the ranked list had stood for 135 years.

Footprint

29 September to 19 October 2018

The area covered by Extreme rain in United States and Mexico, 29 September to 19 October 2018 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, 29 September to 19 October 2018: stations that set records in the event
Station	Type	Value	Date
Wallowa	Record daily precipitation	34.8 mm (1.4 in)	2018-10-09
Mt Carroll	Record daily precipitation	67.3 mm (2.6 in)	2018-10-06
Junction 4SSW	Record daily precipitation	217.4 mm (8.6 in)	2018-10-08
Beloit	Record daily precipitation	74.4 mm (2.9 in)	2018-10-06
Cimarron	Record daily precipitation	67.3 mm (2.6 in)	2018-10-08
Clinton-Sherman AP	Record daily precipitation	111.3 mm (4.4 in)	2018-10-07
Clayton Muni Air Pk	Record daily precipitation	45.2 mm (1.8 in)	2018-10-07
Ellsworth	Record daily precipitation	173.7 mm (6.8 in)	2018-10-10
Phoenix AP	Record daily precipitation	55.6 mm (2.2 in)	2018-10-13
Dodgeville Wwtp	Record daily precipitation	66.8 mm (2.6 in)	2018-10-02
Watonga	Record daily precipitation	96.5 mm (3.8 in)	2018-10-08
Weatherford	Record daily precipitation	102.9 mm (4.1 in)	2018-10-08
Eagle Mtn	Record daily precipitation	34.3 mm (1.4 in)	2018-10-13
Ardmore	Record daily precipitation	109.2 mm (4.3 in)	2018-10-07
Elk City 4 W	Record daily precipitation	89.9 mm (3.5 in)	2018-10-07
Mutual	Record daily precipitation	87.6 mm (3.4 in)	2018-10-08
Knoxville	Record daily precipitation	108.0 mm (4.3 in)	2018-10-09
W Branch 3SE	Record daily precipitation	39.6 mm (1.6 in)	2018-10-02
Jerome	Record daily precipitation	59.4 mm (2.3 in)	2018-10-03
Lahontan Dam	Record daily precipitation	24.4 mm (1.0 in)	2018-10-03

Records per Day

Peak day 345

Records set or tied each day from 29 September 2018 to 19 October 2018. The most in one day was 345 on 9 October 2018.

Records per day during Extreme rain in United States and Mexico, 29 September to 19 October 2018
Date	Records
2018-09-29	1
2018-09-30	11
2018-10-01	46
2018-10-02	159
2018-10-03	124
2018-10-04	148
2018-10-05	64
2018-10-06	132
2018-10-07	155
2018-10-08	271
2018-10-09	345
2018-10-10	307
2018-10-11	50
2018-10-12	21
2018-10-13	82
2018-10-14	26
2018-10-15	3
2018-10-16	9
2018-10-17	7
2018-10-18	7
2018-10-19	2

Top Records by Margin

Margin over the record replaced

Top records of Extreme rain in United States and Mexico, 29 September to 19 October 2018 ranked by margin
Weatherford, 10-08	80.0 mm (3.1 in)
Ellsworth, 10-10	71.8 mm (2.8 in)
Ardmore, 10-07	69.3 mm (2.7 in)
Watonga, 10-08	63.0 mm (2.5 in)
Junction 4SSW, 10-08	62.5 mm (2.5 in)
Clinton-Sherman AP, 10-07	59.5 mm (2.3 in)
Elk City 4 W, 10-07	58.1 mm (2.3 in)
Mutual, 10-08	52.5 mm (2.1 in)
Phoenix AP, 10-13	52.0 mm (2.0 in)
Cimarron, 10-08	48.5 mm (1.9 in)
Mt Carroll, 10-06	42.7 mm (1.7 in)
Beloit, 10-06	38.8 mm (1.5 in)
Clayton Muni Air Pk, 10-07	36.6 mm (1.4 in)
Eagle Mtn, 10-13	34.0 mm (1.3 in)
Dodgeville Wwtp, 10-02	33.5 mm (1.3 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, 29 September to 19 October 2018
Margin (mm)	Years the old record stood
21	107
43	117
63	38
39	91
49	99
72	44
60	59
37	108
52	84
63	80
34	104
34	76
17	79
80	72
69	91
58	81
53	93
22	121
29	104
25	116
14	100
38	72
24	124
24	118
38	60
17	101
24	71
35	72
44	67
44	63
41	88
25	95
108	48
23	85
27	68
35	104
19	108
35	93
21	97
24	76
60	40
44	40
31	87
16	104
50	104
25	91
20	74
20	89
63	40
25	50
52	60
63	49
10	88
23	76
90	40
39	69
40	35
18	84
15	95
24	92
22	91
18	92
15	101
53	35
34	44
31	49
21	69
31	36
36	36
7	112
16	100
15	116
19	113
42	35
17	112
31	17
36	31
55	56
44	49
35	49
42	80
34	44
41	36
22	67
25	89
42	49
29	60
20	16
12	93
14	97
11	97
22	72
34	40
31	0
49	33
24	73
13	105
27	57
6	107
15	92
33	36
32	36
8	77
40	79
28	68
14	93
17	99
16	100
40	25
16	92
21	68
42	60
93	7
35	8
17	48
34	28
19	68
24	3
22	28
12	57
30	9
15	45
27	68
40	53
41	76
119	17
25	64
48	28
31	40
25	35
46	56
19	71
3	67
20	71
30	48
23	52
38	28
41	48
10	107
74	13
11	104
40	49
22	68
31	35
34	56
16	89
27	76
39	48
23	60
25	56
24	56
15	88
35	80
105	8
5	107
50	36
61	7
33	72
10	119
18	64
23	51
25	32
17	64
23	28
22	67
9	104
10	99
47	13
13	132
9	96
7	116
8	119
6	104
27	80
17	34
73	13
10	69
8	104
32	40
26	16
13	44
41	16
74	16
8	105
18	72
12	58
14	87
54	13
53	13
19	44
76	24
61	13
21	56
65	15
14	57
15	49
35	3
24	64
8	113
17	72

Compared With Other Events

Station records per event

Station records in Extreme rain in United States and Mexico, 29 September to 19 October 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 (this event)	1,970 records
Extreme rain in United States, 19 December 2022 to 13 January 2023	1,941 records
Extreme rain in United States, 1 to 23 April 2019	1,769 records

Every Record Set

20 of 1,970

Every record set or tied during Extreme rain in United States and Mexico, 29 September to 19 October 2018, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2018-10-02	Dodgeville Wwtp	Record daily precipitation	66.8 mm (2.6 in)	33.5 mm (1.3 in)	104	72 of 100 (Major)
2018-10-02	W Branch 3SE	Record daily precipitation	39.6 mm (1.6 in)	25.4 mm (1.0 in)	116	67 of 100 (Major)
2018-10-03	Jerome	Record daily precipitation	59.4 mm (2.3 in)	28.9 mm (1.1 in)	104	67 of 100 (Major)
2018-10-03	Lahontan Dam	Record daily precipitation	24.4 mm (1.0 in)	17.0 mm (0.7 in)	79	20 of 100 (Routine)
2018-10-06	Mt Carroll	Record daily precipitation	67.3 mm (2.6 in)	42.7 mm (1.7 in)	117	79 of 100 (Major)
2018-10-06	Beloit	Record daily precipitation	74.4 mm (2.9 in)	38.8 mm (1.5 in)	91	75 of 100 (Major)
2018-10-07	Clinton-Sherman AP	Record daily precipitation	111.3 mm (4.4 in)	59.5 mm (2.3 in)	59	73 of 100 (Major)
2018-10-07	Clayton Muni Air Pk	Record daily precipitation	45.2 mm (1.8 in)	36.6 mm (1.4 in)	108	73 of 100 (Major)
2018-10-07	Ardmore	Record daily precipitation	109.2 mm (4.3 in)	69.3 mm (2.7 in)	91	69 of 100 (Major)
2018-10-07	Elk City 4 W	Record daily precipitation	89.9 mm (3.5 in)	58.1 mm (2.3 in)	81	69 of 100 (Major)
2018-10-08	Junction 4SSW	Record daily precipitation	217.4 mm (8.6 in)	62.5 mm (2.5 in)	38	76 of 100 (Major)
2018-10-08	Cimarron	Record daily precipitation	67.3 mm (2.6 in)	48.5 mm (1.9 in)	99	74 of 100 (Major)
2018-10-08	Watonga	Record daily precipitation	96.5 mm (3.8 in)	63.0 mm (2.5 in)	80	72 of 100 (Major)
2018-10-08	Weatherford	Record daily precipitation	102.9 mm (4.1 in)	80.0 mm (3.1 in)	72	71 of 100 (Major)
2018-10-08	Mutual	Record daily precipitation	87.6 mm (3.4 in)	52.5 mm (2.1 in)	93	69 of 100 (Major)
2018-10-09	Wallowa	Record daily precipitation	34.8 mm (1.4 in)	20.8 mm (0.8 in)	107	80 of 100 (Exceptional)
2018-10-09	Knoxville	Record daily precipitation	108.0 mm (4.3 in)	21.6 mm (0.9 in)	121	68 of 100 (Major)
2018-10-10	Ellsworth	Record daily precipitation	173.7 mm (6.8 in)	71.8 mm (2.8 in)	44	73 of 100 (Major)
2018-10-13	Phoenix AP	Record daily precipitation	55.6 mm (2.2 in)	52.0 mm (2.0 in)	84	73 of 100 (Major)
2018-10-13	Eagle Mtn	Record daily precipitation	34.3 mm (1.4 in)	34.0 mm (1.3 in)	76	71 of 100 (Major)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 1,970 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 2026-10-18. 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
21	107
43	117
63	38
39	91
49	99
72	44
60	59
37	108
52	84
63	80
34	104
34	76
17	79
80	72
69	91
58	81
53	93
22	121
29	104
25	116
14	100
38	72
24	124
24	118
38	60
17	101
24	71
35	72
44	67
44	63
41	88
25	95
108	48
23	85
27	68
35	104
19	108
35	93
21	97
24	76
60	40
44	40
31	87
16	104
50	104
25	91
20	74
20	89
63	40
25	50
52	60
63	49
10	88
23	76
90	40
39	69
40	35
18	84
15	95
24	92
22	91
18	92
15	101
53	35
34	44
31	49
21	69
31	36
36	36
7	112
16	100
15	116
19	113
42	35
17	112
31	17
36	31
55	56
44	49
35	49
42	80
34	44
41	36
22	67
25	89
42	49
29	60
20	16
12	93
14	97
11	97
22	72
34	40
31	0
49	33
24	73
13	105
27	57
6	107
15	92
33	36
32	36
8	77
40	79
28	68
14	93
17	99
16	100
40	25
16	92
21	68
42	60
93	7
35	8
17	48
34	28
19	68
24	3
22	28
12	57
30	9
15	45
27	68
40	53
41	76
119	17
25	64
48	28
31	40
25	35
46	56
19	71
3	67
20	71
30	48
23	52
38	28
41	48
10	107
74	13
11	104
40	49
22	68
31	35
34	56
16	89
27	76
39	48
23	60
25	56
24	56
15	88
35	80
105	8
5	107
50	36
61	7
33	72
10	119
18	64
23	51
25	32
17	64
23	28
22	67
9	104
10	99
47	13
13	132
9	96
7	116
8	119
6	104
27	80
17	34
73	13
10	69
8	104
32	40
26	16
13	44
41	16
74	16
8	105
18	72
12	58
14	87
54	13
53	13
19	44
76	24
61	13
21	56
65	15
14	57
15	49
35	3
24	64
8	113
17	72

Margin (mm)	Years the old record stood
21	107
43	117
63	38
39	91
49	99
72	44
60	59
37	108
52	84
63	80
34	104
34	76
17	79
80	72
69	91
58	81
53	93
22	121
29	104
25	116
14	100
38	72
24	124
24	118
38	60
17	101
24	71
35	72
44	67
44	63
41	88
25	95
108	48
23	85
27	68
35	104
19	108
35	93
21	97
24	76
60	40
44	40
31	87
16	104
50	104
25	91
20	74
20	89
63	40
25	50
52	60
63	49
10	88
23	76
90	40
39	69
40	35
18	84
15	95
24	92
22	91
18	92
15	101
53	35
34	44
31	49
21	69
31	36
36	36
7	112
16	100
15	116
19	113
42	35
17	112
31	17
36	31
55	56
44	49
35	49
42	80
34	44
41	36
22	67
25	89
42	49
29	60
20	16
12	93
14	97
11	97
22	72
34	40
31	0
49	33
24	73
13	105
27	57
6	107
15	92
33	36
32	36
8	77
40	79
28	68
14	93
17	99
16	100
40	25
16	92
21	68
42	60
93	7
35	8
17	48
34	28
19	68
24	3
22	28
12	57
30	9
15	45
27	68
40	53
41	76
119	17
25	64
48	28
31	40
25	35
46	56
19	71
3	67
20	71
30	48
23	52
38	28
41	48
10	107
74	13
11	104
40	49
22	68
31	35
34	56
16	89
27	76
39	48
23	60
25	56
24	56
15	88
35	80
105	8
5	107
50	36
61	7
33	72
10	119
18	64
23	51
25	32
17	64
23	28
22	67
9	104
10	99
47	13
13	132
9	96
7	116
8	119
6	104
27	80
17	34
73	13
10	69
8	104
32	40
26	16
13	44
41	16
74	16
8	105
18	72
12	58
14	87
54	13
53	13
19	44
76	24
61	13
21	56
65	15
14	57
15	49
35	3
24	64
8	113
17	72

Margin (mm)	Years the old record stood
21	107
43	117
63	38
39	91
49	99
72	44
60	59
37	108
52	84
63	80
34	104
34	76
17	79
80	72
69	91
58	81
53	93
22	121
29	104
25	116
14	100
38	72
24	124
24	118
38	60
17	101
24	71
35	72
44	67
44	63
41	88
25	95
108	48
23	85
27	68
35	104
19	108
35	93
21	97
24	76
60	40
44	40
31	87
16	104
50	104
25	91
20	74
20	89
63	40
25	50
52	60
63	49
10	88
23	76
90	40
39	69
40	35
18	84
15	95
24	92
22	91
18	92
15	101
53	35
34	44
31	49
21	69
31	36
36	36
7	112
16	100
15	116
19	113
42	35
17	112
31	17
36	31
55	56
44	49
35	49
42	80
34	44
41	36
22	67
25	89
42	49
29	60
20	16
12	93
14	97
11	97
22	72
34	40
31	0
49	33
24	73
13	105
27	57
6	107
15	92
33	36
32	36
8	77
40	79
28	68
14	93
17	99
16	100
40	25
16	92
21	68
42	60
93	7
35	8
17	48
34	28
19	68
24	3
22	28
12	57
30	9
15	45
27	68
40	53
41	76
119	17
25	64
48	28
31	40
25	35
46	56
19	71
3	67
20	71
30	48
23	52
38	28
41	48
10	107
74	13
11	104
40	49
22	68
31	35
34	56
16	89
27	76
39	48
23	60
25	56
24	56
15	88
35	80
105	8
5	107
50	36
61	7
33	72
10	119
18	64
23	51
25	32
17	64
23	28
22	67
9	104
10	99
47	13
13	132
9	96
7	116
8	119
6	104
27	80
17	34
73	13
10	69
8	104
32	40
26	16
13	44
41	16
74	16
8	105
18	72
12	58
14	87
54	13
53	13
19	44
76	24
61	13
21	56
65	15
14	57
15	49
35	3
24	64
8	113
17	72