Extreme rain in United States, 6 May to 4 June 2018

Name: Extreme rain in United States, 6 May to 4 June 2018
Start: 2018-05-06
End: 2018-06-04
Location: United States

Extreme rain in United States, 6 May to 4 June 2018: 1,729 records at 1,267 stations, peak on 18 May 2018. Closed.

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

Key Facts

Extreme rain in United States, 6 May to 4 June 2018 set or tied 1,729 station records at 1,267 stations.
It ran from 6 May 2018 to 4 June 2018 (30 days) and its peak day was 18 May 2018.
Status: closed.
Louisville 1 E set a daily record precipitation of 110.2 mm (4.3 in) on 26 May 2018.
The busiest day was 18 May 2018 with 124 records.
The oldest broken record in the ranked list had stood for 135 years.

Footprint

6 May to 4 June 2018

The area covered by Extreme rain in United States, 6 May to 4 June 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, 6 May to 4 June 2018: stations that set records in the event
Station	Type	Value	Date
Maquoketa	Record daily precipitation	71.1 mm (2.8 in)	2018-05-20
Sugar City	Record daily precipitation	35.6 mm (1.4 in)	2018-05-23
Louisville 1 E	Record daily precipitation	110.2 mm (4.3 in)	2018-05-26
Highlands	Record daily precipitation	151.6 mm (6.0 in)	2018-05-30
Haugan 1 W	Record daily precipitation	73.9 mm (2.9 in)	2018-05-31
Northport	Record daily precipitation	46.2 mm (1.8 in)	2018-05-18
Hill City Muni AP	Record daily precipitation	142.5 mm (5.6 in)	2018-05-28
Freehold-Marlboro	Record daily precipitation	90.2 mm (3.6 in)	2018-05-27
Helen	Record daily precipitation	176.8 mm (7.0 in)	2018-06-01
Ashland	Record daily precipitation	104.6 mm (4.1 in)	2018-05-18
Madison	Record daily precipitation	65.8 mm (2.6 in)	2018-05-15
Toccoa	Record daily precipitation	95.8 mm (3.8 in)	2018-05-16
Patuxent River NAS	Record daily precipitation	99.3 mm (3.9 in)	2018-05-18
Iola 1 W	Record daily precipitation	84.6 mm (3.3 in)	2018-05-15
Butler 4W	Record daily precipitation	97.0 mm (3.8 in)	2018-05-25
Blue Canyon Nyack AP	Record daily precipitation	124.0 mm (4.9 in)	2018-05-25
Great Falls 16St	Record daily precipitation	32.5 mm (1.3 in)	2018-05-11
Delta	Record daily precipitation	25.7 mm (1.0 in)	2018-05-13
Chatham	Record daily precipitation	63.2 mm (2.5 in)	2018-05-19

Records per Day

Peak day 124

Records set or tied each day from 6 May 2018 to 4 June 2018. The most in one day was 124 on 18 May 2018.

Records per day during Extreme rain in United States, 6 May to 4 June 2018
Date	Records
2018-05-06	4
2018-05-07	4
2018-05-08	8
2018-05-09	5
2018-05-10	4
2018-05-11	39
2018-05-12	69
2018-05-13	54
2018-05-14	54
2018-05-15	65
2018-05-16	72
2018-05-17	107
2018-05-18	124
2018-05-19	120
2018-05-20	49
2018-05-21	65
2018-05-22	60
2018-05-23	103
2018-05-24	47
2018-05-25	51
2018-05-26	41
2018-05-27	64
2018-05-28	88
2018-05-29	97
2018-05-30	108
2018-05-31	86
2018-06-01	87
2018-06-02	30
2018-06-03	16
2018-06-04	8

Top Records by Margin

Margin over the record replaced

Top records of Extreme rain in United States, 6 May to 4 June 2018 ranked by margin
Highlands, 05-30	116.0 mm (4.6 in)
Ashland, 05-28	101.6 mm (4.0 in)
Helen, 06-01	74.7 mm (2.9 in)
Ashland, 05-18	74.1 mm (2.9 in)
Butler 4W, 05-25	62.5 mm (2.5 in)
Louisville 1 E, 05-26	59.4 mm (2.3 in)
Hill City Muni AP, 05-28	53.9 mm (2.1 in)
Freehold-Marlboro, 05-27	53.9 mm (2.1 in)
Blue Canyon Nyack AP, 05-25	51.6 mm (2.0 in)
Patuxent River NAS, 05-18	50.8 mm (2.0 in)
Toccoa, 05-16	45.0 mm (1.8 in)
Madison, 05-15	43.4 mm (1.7 in)
Maquoketa, 05-20	41.9 mm (1.6 in)
Iola 1 W, 05-15	41.2 mm (1.6 in)
Chatham, 05-19	35.3 mm (1.4 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, 6 May to 4 June 2018
Margin (mm)	Years the old record stood
59	115
26	108
42	103
116	115
34	61
21	118
54	50
75	52
54	72
74	68
102	68
45	95
43	117
51	72
41	108
63	72
52	76
21	104
35	88
24	60
26	83
48	60
32	72
26	88
60	49
59	56
27	122
44	95
35	72
29	123
59	55
33	81
60	40
23	119
15	47
108	48
37	93
66	48
17	60
17	57
19	100
44	57
26	37
51	36
53	57
18	76
34	67
70	0
27	84
44	52
46	47
48	64
20	93
71	60
65	32
39	31
43	72
47	48
80	43
25	100
37	72
48	43
18	63
38	55
40	36
16	49
9	124
26	40
37	64
11	100
32	48
56	59
41	0
8	98
27	92
14	29
61	43
20	111
26	67
17	109
22	68
43	47
26	107
21	108
11	72
27	97
56	32
22	112
21	112
22	75
22	37
33	65
13	91
18	100
21	115
34	60
21	60
43	43
65	27
23	24
17	74
18	33
17	79
14	108
22	113
11	75
34	4
17	72
41	31
28	52
40	49
22	116
34	67
39	37
45	40
29	59
38	31
11	103
12	30
77	20
32	22
14	122
64	24
44	15
46	19
42	68
28	36
53	21
65	20
13	67
62	41
72	25
20	79
63	41
37	41
16	83
43	35
33	45
29	71
34	56
14	56
24	52
15	40
7	100
22	61
98	13
10	43
26	59
6	111
34	7
54	8
20	72
27	43
19	55
9	76
30	69
36	8
21	73
30	24
16	67
17	83
14	55
45	32
53	27
22	60
15	24
31	40
11	115
34	51
57	4
26	60
8	108
33	4
21	37
25	59
9	109
16	51
24	83
10	111
29	61
16	61
34	43
11	96
12	113
42	21
39	35
35	13
23	13
31	41
12	20
4	120
9	63
32	55
48	53
9	60
30	7
11	55
17	83
10	95
20	68

Compared With Other Events

Station records per event

Station records in Extreme rain in United States, 6 May to 4 June 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, 6 May to 4 June 2018 (this event)	1,729 records

Every Record Set

20 of 1,729

Every record set or tied during Extreme rain in United States, 6 May to 4 June 2018, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2018-05-11	Great Falls 16St	Record daily precipitation	32.5 mm (1.3 in)	20.8 mm (0.8 in)	104	66 of 100 (Major)
2018-05-13	Delta	Record daily precipitation	25.7 mm (1.0 in)	24.4 mm (1.0 in)	60	66 of 100 (Major)
2018-05-15	Madison	Record daily precipitation	65.8 mm (2.6 in)	43.4 mm (1.7 in)	117	68 of 100 (Major)
2018-05-15	Iola 1 W	Record daily precipitation	84.6 mm (3.3 in)	41.2 mm (1.6 in)	108	67 of 100 (Major)
2018-05-16	Toccoa	Record daily precipitation	95.8 mm (3.8 in)	45.0 mm (1.8 in)	95	68 of 100 (Major)
2018-05-18	Northport	Record daily precipitation	46.2 mm (1.8 in)	20.8 mm (0.8 in)	118	77 of 100 (Major)
2018-05-18	Ashland	Record daily precipitation	104.6 mm (4.1 in)	74.1 mm (2.9 in)	68	70 of 100 (Major)
2018-05-18	Patuxent River NAS	Record daily precipitation	99.3 mm (3.9 in)	50.8 mm (2.0 in)	72	68 of 100 (Major)
2018-05-19	Chatham	Record daily precipitation	63.2 mm (2.5 in)	35.3 mm (1.4 in)	88	66 of 100 (Major)
2018-05-20	Maquoketa	Record daily precipitation	71.1 mm (2.8 in)	41.9 mm (1.6 in)	103	80 of 100 (Exceptional)
2018-05-23	Sugar City	Record daily precipitation	35.6 mm (1.4 in)	25.7 mm (1.0 in)	108	80 of 100 (Exceptional)
2018-05-25	Butler 4W	Record daily precipitation	97.0 mm (3.8 in)	62.5 mm (2.5 in)	72	67 of 100 (Major)
2018-05-25	Blue Canyon Nyack AP	Record daily precipitation	124.0 mm (4.9 in)	51.6 mm (2.0 in)	76	67 of 100 (Major)
2018-05-26	Louisville 1 E	Record daily precipitation	110.2 mm (4.3 in)	59.4 mm (2.3 in)	115	80 of 100 (Exceptional)
2018-05-27	Freehold-Marlboro	Record daily precipitation	90.2 mm (3.6 in)	53.9 mm (2.1 in)	72	71 of 100 (Major)
2018-05-28	Hill City Muni AP	Record daily precipitation	142.5 mm (5.6 in)	53.9 mm (2.1 in)	50	75 of 100 (Major)
2018-05-28	Ashland	Record daily precipitation	140.0 mm (5.5 in)	101.6 mm (4.0 in)	68	70 of 100 (Major)
2018-05-30	Highlands	Record daily precipitation	151.6 mm (6.0 in)	116.0 mm (4.6 in)	115	80 of 100 (Exceptional)
2018-05-31	Haugan 1 W	Record daily precipitation	73.9 mm (2.9 in)	33.8 mm (1.3 in)	61	78 of 100 (Major)
2018-06-01	Helen	Record daily precipitation	176.8 mm (7.0 in)	74.7 mm (2.9 in)	52	71 of 100 (Major)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 1,729 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.

Margin (mm)	Years the old record stood
59	115
26	108
42	103
116	115
34	61
21	118
54	50
75	52
54	72
74	68
102	68
45	95
43	117
51	72
41	108
63	72
52	76
21	104
35	88
24	60
26	83
48	60
32	72
26	88
60	49
59	56
27	122
44	95
35	72
29	123
59	55
33	81
60	40
23	119
15	47
108	48
37	93
66	48
17	60
17	57
19	100
44	57
26	37
51	36
53	57
18	76
34	67
70	0
27	84
44	52
46	47
48	64
20	93
71	60
65	32
39	31
43	72
47	48
80	43
25	100
37	72
48	43
18	63
38	55
40	36
16	49
9	124
26	40
37	64
11	100
32	48
56	59
41	0
8	98
27	92
14	29
61	43
20	111
26	67
17	109
22	68
43	47
26	107
21	108
11	72
27	97
56	32
22	112
21	112
22	75
22	37
33	65
13	91
18	100
21	115
34	60
21	60
43	43
65	27
23	24
17	74
18	33
17	79
14	108
22	113
11	75
34	4
17	72
41	31
28	52
40	49
22	116
34	67
39	37
45	40
29	59
38	31
11	103
12	30
77	20
32	22
14	122
64	24
44	15
46	19
42	68
28	36
53	21
65	20
13	67
62	41
72	25
20	79
63	41
37	41
16	83
43	35
33	45
29	71
34	56
14	56
24	52
15	40
7	100
22	61
98	13
10	43
26	59
6	111
34	7
54	8
20	72
27	43
19	55
9	76
30	69
36	8
21	73
30	24
16	67
17	83
14	55
45	32
53	27
22	60
15	24
31	40
11	115
34	51
57	4
26	60
8	108
33	4
21	37
25	59
9	109
16	51
24	83
10	111
29	61
16	61
34	43
11	96
12	113
42	21
39	35
35	13
23	13
31	41
12	20
4	120
9	63
32	55
48	53
9	60
30	7
11	55
17	83
10	95
20	68

Margin (mm)	Years the old record stood
59	115
26	108
42	103
116	115
34	61
21	118
54	50
75	52
54	72
74	68
102	68
45	95
43	117
51	72
41	108
63	72
52	76
21	104
35	88
24	60
26	83
48	60
32	72
26	88
60	49
59	56
27	122
44	95
35	72
29	123
59	55
33	81
60	40
23	119
15	47
108	48
37	93
66	48
17	60
17	57
19	100
44	57
26	37
51	36
53	57
18	76
34	67
70	0
27	84
44	52
46	47
48	64
20	93
71	60
65	32
39	31
43	72
47	48
80	43
25	100
37	72
48	43
18	63
38	55
40	36
16	49
9	124
26	40
37	64
11	100
32	48
56	59
41	0
8	98
27	92
14	29
61	43
20	111
26	67
17	109
22	68
43	47
26	107
21	108
11	72
27	97
56	32
22	112
21	112
22	75
22	37
33	65
13	91
18	100
21	115
34	60
21	60
43	43
65	27
23	24
17	74
18	33
17	79
14	108
22	113
11	75
34	4
17	72
41	31
28	52
40	49
22	116
34	67
39	37
45	40
29	59
38	31
11	103
12	30
77	20
32	22
14	122
64	24
44	15
46	19
42	68
28	36
53	21
65	20
13	67
62	41
72	25
20	79
63	41
37	41
16	83
43	35
33	45
29	71
34	56
14	56
24	52
15	40
7	100
22	61
98	13
10	43
26	59
6	111
34	7
54	8
20	72
27	43
19	55
9	76
30	69
36	8
21	73
30	24
16	67
17	83
14	55
45	32
53	27
22	60
15	24
31	40
11	115
34	51
57	4
26	60
8	108
33	4
21	37
25	59
9	109
16	51
24	83
10	111
29	61
16	61
34	43
11	96
12	113
42	21
39	35
35	13
23	13
31	41
12	20
4	120
9	63
32	55
48	53
9	60
30	7
11	55
17	83
10	95
20	68

Margin (mm)	Years the old record stood
59	115
26	108
42	103
116	115
34	61
21	118
54	50
75	52
54	72
74	68
102	68
45	95
43	117
51	72
41	108
63	72
52	76
21	104
35	88
24	60
26	83
48	60
32	72
26	88
60	49
59	56
27	122
44	95
35	72
29	123
59	55
33	81
60	40
23	119
15	47
108	48
37	93
66	48
17	60
17	57
19	100
44	57
26	37
51	36
53	57
18	76
34	67
70	0
27	84
44	52
46	47
48	64
20	93
71	60
65	32
39	31
43	72
47	48
80	43
25	100
37	72
48	43
18	63
38	55
40	36
16	49
9	124
26	40
37	64
11	100
32	48
56	59
41	0
8	98
27	92
14	29
61	43
20	111
26	67
17	109
22	68
43	47
26	107
21	108
11	72
27	97
56	32
22	112
21	112
22	75
22	37
33	65
13	91
18	100
21	115
34	60
21	60
43	43
65	27
23	24
17	74
18	33
17	79
14	108
22	113
11	75
34	4
17	72
41	31
28	52
40	49
22	116
34	67
39	37
45	40
29	59
38	31
11	103
12	30
77	20
32	22
14	122
64	24
44	15
46	19
42	68
28	36
53	21
65	20
13	67
62	41
72	25
20	79
63	41
37	41
16	83
43	35
33	45
29	71
34	56
14	56
24	52
15	40
7	100
22	61
98	13
10	43
26	59
6	111
34	7
54	8
20	72
27	43
19	55
9	76
30	69
36	8
21	73
30	24
16	67
17	83
14	55
45	32
53	27
22	60
15	24
31	40
11	115
34	51
57	4
26	60
8	108
33	4
21	37
25	59
9	109
16	51
24	83
10	111
29	61
16	61
34	43
11	96
12	113
42	21
39	35
35	13
23	13
31	41
12	20
4	120
9	63
32	55
48	53
9	60
30	7
11	55
17	83
10	95
20	68