Extreme rain in United States, 16 to 20 December 2018

Name: Extreme rain in United States, 16 to 20 December 2018
Start: 2018-12-16
End: 2018-12-20
Location: United States

Extreme rain in United States, 16 to 20 December 2018: 132 records at 129 stations, peak on 18 December 2018. Closed.

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

Key Facts

Extreme rain in United States, 16 to 20 December 2018 set or tied 132 station records at 129 stations.
It ran from 16 December 2018 to 20 December 2018 (5 days) and its peak day was 18 December 2018.
Status: closed.
Moscow U of I set a daily record precipitation of 43.9 mm (1.7 in) on 18 December 2018.
The busiest day was 18 December 2018 with 95 records.
The oldest broken record in the ranked list had stood for 104 years.

Footprint

16 to 20 December 2018

The area covered by Extreme rain in United States, 16 to 20 December 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, 16 to 20 December 2018: stations that set records in the event
Station	Type	Value	Date
Moscow U of I	Record daily precipitation	43.9 mm (1.7 in)	2018-12-18
Mullan Pass Vor/Dme	Record daily precipitation	47.2 mm (1.9 in)	2018-12-18
Fall Rvr Mills	Record daily precipitation	37.6 mm (1.5 in)	2018-12-17
Chico UNIV Farm	Record daily precipitation	54.6 mm (2.1 in)	2018-12-17
Nicolaus #2	Record daily precipitation	50.3 mm (2.0 in)	2018-12-17
Dallas 2 NE	Record daily precipitation	63.5 mm (2.5 in)	2018-12-18
Santa Cruz	Record daily precipitation	63.5 mm (2.5 in)	2018-12-16
Newman	Record daily precipitation	39.6 mm (1.6 in)	2018-12-17
Coleman Fisheries STN	Record daily precipitation	57.9 mm (2.3 in)	2018-12-16
Ft Ross	Record daily precipitation	39.6 mm (1.6 in)	2018-12-17
Harts Pass	Record daily precipitation	58.4 mm (2.3 in)	2018-12-18
Clear Lake	Record daily precipitation	55.9 mm (2.2 in)	2018-12-18
Stampede Pass	Record daily precipitation	115.6 mm (4.6 in)	2018-12-18
Quincy	Record daily precipitation	53.1 mm (2.1 in)	2018-12-17
Clackamas Lake	Record daily precipitation	68.6 mm (2.7 in)	2018-12-18
Tracy Carbona	Record daily precipitation	24.9 mm (1.0 in)	2018-12-17
Gerber Dam	Record daily precipitation	11.9 mm (0.5 in)	2018-12-17
Republic	Record daily precipitation	16.0 mm (0.6 in)	2018-12-17
Pendleton Branch Exp STN	Record daily precipitation	10.4 mm (0.4 in)	2018-12-18
Dallesport AP	Record daily precipitation	24.4 mm (1.0 in)	2018-12-18

Records per Day

Peak day 95

Records set or tied each day from 16 December 2018 to 20 December 2018. The most in one day was 95 on 18 December 2018.

Top Records by Margin

Margin over the record replaced

Top records of Extreme rain in United States, 16 to 20 December 2018 ranked by margin
Stampede Pass, 12-18	61.0 mm (2.4 in)
Clackamas Lake, 12-18	43.2 mm (1.7 in)
Harts Pass, 12-18	38.1 mm (1.5 in)
Santa Cruz, 12-16	30.5 mm (1.2 in)
Clear Lake, 12-18	30.5 mm (1.2 in)
Nicolaus #2, 12-17	28.5 mm (1.1 in)
Moscow U of I, 12-18	27.6 mm (1.1 in)
Mullan Pass Vor/Dme, 12-18	24.6 mm (1.0 in)
Dallas 2 NE, 12-18	21.1 mm (0.8 in)
Chico UNIV Farm, 12-17	20.3 mm (0.8 in)
Coleman Fisheries STN, 12-16	19.8 mm (0.8 in)
Newman, 12-17	16.2 mm (0.6 in)
Fall Rvr Mills, 12-17	14.7 mm (0.6 in)
Tracy Carbona, 12-17	8.9 mm (0.35 in)
Dallesport AP, 12-18	8.1 mm (0.32 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

132 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, 16 to 20 December 2018
Margin (mm)	Years the old record stood
28	100
25	60
9	104
15	76
20	77
29	45
21	67
16	40
31	56
20	72
4	104
38	11
8	67
2	84
5	56
31	28
61	0
6	68
7	77
43	9
46	36
13	56
18	60
2	77
1	88
3	76
6	60
13	67
41	28
51	11
11	63
6	60
6	71
23	28
31	36
25	27
5	60
16	45
2	68
23	36
31	28
6	24
14	36
4	56
3	45
18	27
31	36
20	36
8	60
1	57
15	36
23	36
5	45
34	3
22	3
1	44
2	57
20	11
2	40
1	45
0	40
15	19
38	11
10	36
28	3
38	9
15	36
2	19
25	19
13	19
13	36
13	36
8	27
15	0
20	3
8	36
15	28
1	45
5	28
10	36
8	36
10	28
8	36
11	3
12	3
5	36
13	19
5	36
5	36
16	16
13	3
3	36
18	11
21	3
8	3
10	19
20	3
3	27
4	11
5	11
23	11
3	19
10	3
8	3
3	28
13	3
3	19
10	3
5	11
3	24
8	3
8	16
5	11
3	11
1	4
3	5
0	9
3	3
10	0
3	11
3	11
8	3
5	3
1	3
4	3
6	0
1	3
3	3
3	3
5	0
1	0
3	0

Compared With Other Events

Station records per event

Station records in Extreme rain in United States, 16 to 20 December 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, 16 to 20 December 2018 (this event)	132 records

Every Record Set

20 of 132

Every record set or tied during Extreme rain in United States, 16 to 20 December 2018, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2018-12-16	Santa Cruz	Record daily precipitation	63.5 mm (2.5 in)	30.5 mm (1.2 in)	56	43 of 100 (Notable)
2018-12-16	Coleman Fisheries STN	Record daily precipitation	57.9 mm (2.3 in)	19.8 mm (0.8 in)	72	42 of 100 (Notable)
2018-12-17	Fall Rvr Mills	Record daily precipitation	37.6 mm (1.5 in)	14.7 mm (0.6 in)	76	48 of 100 (Notable)
2018-12-17	Chico UNIV Farm	Record daily precipitation	54.6 mm (2.1 in)	20.3 mm (0.8 in)	77	47 of 100 (Notable)
2018-12-17	Nicolaus #2	Record daily precipitation	50.3 mm (2.0 in)	28.5 mm (1.1 in)	45	46 of 100 (Notable)
2018-12-17	Newman	Record daily precipitation	39.6 mm (1.6 in)	16.2 mm (0.6 in)	40	43 of 100 (Notable)
2018-12-17	Ft Ross	Record daily precipitation	39.6 mm (1.6 in)	4.0 mm (0.16 in)	104	42 of 100 (Notable)
2018-12-17	Quincy	Record daily precipitation	53.1 mm (2.1 in)	7.4 mm (0.29 in)	77	36 of 100 (Notable)
2018-12-17	Tracy Carbona	Record daily precipitation	24.9 mm (1.0 in)	8.9 mm (0.35 in)	104	20 of 100 (Routine)
2018-12-17	Gerber Dam	Record daily precipitation	11.9 mm (0.5 in)	5.5 mm (0.22 in)	68	20 of 100 (Routine)
2018-12-17	Republic	Record daily precipitation	16.0 mm (0.6 in)	5.1 mm (0.20 in)	56	20 of 100 (Routine)
2018-12-18	Moscow U of I	Record daily precipitation	43.9 mm (1.7 in)	27.6 mm (1.1 in)	100	80 of 100 (Exceptional)
2018-12-18	Mullan Pass Vor/Dme	Record daily precipitation	47.2 mm (1.9 in)	24.6 mm (1.0 in)	60	56 of 100 (Notable)
2018-12-18	Dallas 2 NE	Record daily precipitation	63.5 mm (2.5 in)	21.1 mm (0.8 in)	67	44 of 100 (Notable)
2018-12-18	Harts Pass	Record daily precipitation	58.4 mm (2.3 in)	38.1 mm (1.5 in)	11	41 of 100 (Notable)
2018-12-18	Clear Lake	Record daily precipitation	55.9 mm (2.2 in)	30.5 mm (1.2 in)	28	38 of 100 (Notable)
2018-12-18	Stampede Pass	Record daily precipitation	115.6 mm (4.6 in)	61.0 mm (2.4 in)	0	38 of 100 (Notable)
2018-12-18	Clackamas Lake	Record daily precipitation	68.6 mm (2.7 in)	43.2 mm (1.7 in)	9	36 of 100 (Notable)
2018-12-18	Pendleton Branch Exp STN	Record daily precipitation	10.4 mm (0.4 in)	2.3 mm (0.09 in)	84	20 of 100 (Routine)
2018-12-18	Dallesport AP	Record daily precipitation	24.4 mm (1.0 in)	8.1 mm (0.32 in)	67	20 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 132 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
28	100
25	60
9	104
15	76
20	77
29	45
21	67
16	40
31	56
20	72
4	104
38	11
8	67
2	84
5	56
31	28
61	0
6	68
7	77
43	9
46	36
13	56
18	60
2	77
1	88
3	76
6	60
13	67
41	28
51	11
11	63
6	60
6	71
23	28
31	36
25	27
5	60
16	45
2	68
23	36
31	28
6	24
14	36
4	56
3	45
18	27
31	36
20	36
8	60
1	57
15	36
23	36
5	45
34	3
22	3
1	44
2	57
20	11
2	40
1	45
0	40
15	19
38	11
10	36
28	3
38	9
15	36
2	19
25	19
13	19
13	36
13	36
8	27
15	0
20	3
8	36
15	28
1	45
5	28
10	36
8	36
10	28
8	36
11	3
12	3
5	36
13	19
5	36
5	36
16	16
13	3
3	36
18	11
21	3
8	3
10	19
20	3
3	27
4	11
5	11
23	11
3	19
10	3
8	3
3	28
13	3
3	19
10	3
5	11
3	24
8	3
8	16
5	11
3	11
1	4
3	5
0	9
3	3
10	0
3	11
3	11
8	3
5	3
1	3
4	3
6	0
1	3
3	3
3	3
5	0
1	0
3	0

Margin (mm)	Years the old record stood
28	100
25	60
9	104
15	76
20	77
29	45
21	67
16	40
31	56
20	72
4	104
38	11
8	67
2	84
5	56
31	28
61	0
6	68
7	77
43	9
46	36
13	56
18	60
2	77
1	88
3	76
6	60
13	67
41	28
51	11
11	63
6	60
6	71
23	28
31	36
25	27
5	60
16	45
2	68
23	36
31	28
6	24
14	36
4	56
3	45
18	27
31	36
20	36
8	60
1	57
15	36
23	36
5	45
34	3
22	3
1	44
2	57
20	11
2	40
1	45
0	40
15	19
38	11
10	36
28	3
38	9
15	36
2	19
25	19
13	19
13	36
13	36
8	27
15	0
20	3
8	36
15	28
1	45
5	28
10	36
8	36
10	28
8	36
11	3
12	3
5	36
13	19
5	36
5	36
16	16
13	3
3	36
18	11
21	3
8	3
10	19
20	3
3	27
4	11
5	11
23	11
3	19
10	3
8	3
3	28
13	3
3	19
10	3
5	11
3	24
8	3
8	16
5	11
3	11
1	4
3	5
0	9
3	3
10	0
3	11
3	11
8	3
5	3
1	3
4	3
6	0
1	3
3	3
3	3
5	0
1	0
3	0

Margin (mm)	Years the old record stood
28	100
25	60
9	104
15	76
20	77
29	45
21	67
16	40
31	56
20	72
4	104
38	11
8	67
2	84
5	56
31	28
61	0
6	68
7	77
43	9
46	36
13	56
18	60
2	77
1	88
3	76
6	60
13	67
41	28
51	11
11	63
6	60
6	71
23	28
31	36
25	27
5	60
16	45
2	68
23	36
31	28
6	24
14	36
4	56
3	45
18	27
31	36
20	36
8	60
1	57
15	36
23	36
5	45
34	3
22	3
1	44
2	57
20	11
2	40
1	45
0	40
15	19
38	11
10	36
28	3
38	9
15	36
2	19
25	19
13	19
13	36
13	36
8	27
15	0
20	3
8	36
15	28
1	45
5	28
10	36
8	36
10	28
8	36
11	3
12	3
5	36
13	19
5	36
5	36
16	16
13	3
3	36
18	11
21	3
8	3
10	19
20	3
3	27
4	11
5	11
23	11
3	19
10	3
8	3
3	28
13	3
3	19
10	3
5	11
3	24
8	3
8	16
5	11
3	11
1	4
3	5
0	9
3	3
10	0
3	11
3	11
8	3
5	3
1	3
4	3
6	0
1	3
3	3
3	3
5	0
1	0
3	0