Cold outbreak in United States, 29 April to 4 May 2018

Name: Cold outbreak in United States, 29 April to 4 May 2018
Start: 2018-04-29
End: 2018-05-04
Location: United States

Cold outbreak in United States, 29 April to 4 May 2018: 108 records at 96 stations, peak on 2 May 2018. Closed.

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

Key Facts

Cold outbreak in United States, 29 April to 4 May 2018 set or tied 108 station records at 96 stations.
It ran from 29 April 2018 to 4 May 2018 (6 days) and its peak day was 2 May 2018.
Status: closed.
Jerome set a daily record low maximum temperature of 7.8 C (46.0 F) on 3 May 2018.
The busiest day was 2 May 2018 with 49 records.
The oldest broken record in the ranked list had stood for 119 years.

Footprint

29 April to 4 May 2018

The area covered by Cold outbreak in United States, 29 April to 4 May 2018 is outlined, with 20 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Cold outbreak in United States, 29 April to 4 May 2018: stations that set records in the event
Station	Type	Value	Date
Jerome	Record low maximum temperature	7.8 C (46.0 F)	2018-05-03
Searchlight	Record low maximum temperature	15.0 C (59.0 F)	2018-05-03
Quartzsite	Record low maximum temperature	24.4 C (75.9 F)	2018-05-02
Prescott	Record low maximum temperature	11.1 C (52.0 F)	2018-05-03
Ferron	Record low maximum temperature	6.1 C (43.0 F)	2018-05-03
Zion Np	Record low maximum temperature	13.9 C (57.0 F)	2018-05-03
Natural Brg	Record low minimum temperature	-2.8 C (27.0 F)	2018-05-01
Montezuma Castle Nm	Record low maximum temperature	13.3 C (55.9 F)	2018-05-02
El Centro 2 SSW	Record low maximum temperature	21.1 C (70.0 F)	2018-05-02
Laveen 3 SSE	Record low maximum temperature	21.7 C (71.1 F)	2018-05-01
Eagle Mtn	Record low maximum temperature	19.4 C (66.9 F)	2018-05-03
Imperial Beach Ream Fld NAS	Record low minimum temperature	7.8 C (46.0 F)	2018-05-03
Glennville	Record low minimum temperature	-3.3 C (26.1 F)	2018-05-02
Bunkerville	Record low maximum temperature	15.0 C (59.0 F)	2018-05-02
Palomar Mtn Obsy	Record low maximum temperature	5.6 C (42.1 F)	2018-05-02
Blythe ASOS	Record low maximum temperature	23.3 C (73.9 F)	2018-05-02
Swan Valley	Record low maximum temperature	2.2 C (36.0 F)	2018-05-01
Alpine	Record low maximum temperature	11.7 C (53.1 F)	2018-05-02
Prescott Love Fld	Record low maximum temperature	10.0 C (50.0 F)	2018-05-02
Hayfield Pumping Plt	Record low maximum temperature	21.1 C (70.0 F)	2018-05-03

Records per Day

Peak day 49

Records set or tied each day from 29 April 2018 to 4 May 2018. The most in one day was 49 on 2 May 2018.

Top Records by Margin

Margin over the record replaced

Top records of Cold outbreak in United States, 29 April to 4 May 2018 ranked by margin
Bunkerville, 05-02	3.3 C (5.9 F)
Eagle Mtn, 05-03	2.3 C (4.1 F)
El Centro 2 SSW, 05-02	2.2 C (4.0 F)
Searchlight, 05-03	1.7 C (3.1 F)
Jerome, 05-03	1.6 C (2.9 F)
Laveen 3 SSE, 05-01	1.6 C (2.9 F)
Palomar Mtn Obsy, 05-02	1.6 C (2.9 F)
Quartzsite, 05-02	1.2 C (2.2 F)
Zion Np, 05-03	1.1 C (2.0 F)
Montezuma Castle Nm, 05-02	1.1 C (2.0 F)
Glennville, 05-02	1.1 C (2.0 F)
Blythe ASOS, 05-02	1.1 C (2.0 F)
Alpine, 05-02	1.1 C (2.0 F)
Swan Valley, 05-01	1.1 C (2.0 F)
Prescott, 05-03	0.6 C (1.1 F)

Margin is how far the new value is beyond the record it replaced. Ties are not shown.

Margin Against Age of the Broken Record

108 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 Cold outbreak in United States, 29 April to 4 May 2018
Margin (C)	Years the old record stood
1.6	112
1.7	103
1.2	104
0.6	112
0.6	119
1.1	88
0.6	52
1.1	76
2.2	63
1.6	67
2.3	59
0.5	69
1.1	64
3.3	26
1.6	63
1.1	63
1.1	63
0.6	59
1.1	34
0.6	63
0.6	63
0.6	63
1.7	40
0.6	53
3.3	40
1.7	30
0.5	63
1.6	0
1.7	51
3.9	28
2.2	40
0.6	53
2.8	35
0.6	51
3.9	27
3.3	35
3.3	27
0.6	40
1.6	40
4.4	29
1.7	39
4.4	8
0.6	40
0.5	40
5.0	8
0.5	37
1.7	29
2.3	35
2.3	35
3.7	27
0.6	35
0.5	33
2.8	27
2.2	27
1.7	29
1.1	27
3.3	8
1.5	31
0.6	35
2.3	8
1.1	16
4.4	8
1.7	27
1.7	29
1.6	27
1.7	29
0.6	35
0.5	35
1.7	27
0.6	16
2.2	8
2.8	8
0.5	31
1.6	16
0.5	16
0.6	27
5.0	5
2.2	23
0.6	29
1.1	8
3.9	5
2.8	9
3.0	8
0.1	29
2.2	5
1.2	8
1.1	5
1.1	8
1.2	8
0.6	23
1.2	19
0.5	24
0.6	8
1.7	5
2.4	8
1.1	8
1.7	8
1.6	9
1.3	9
2.1	8
0.5	8
1.1	8
1.1	7
1.5	8
0.5	5
1.1	4
0.6	8
0.7	8

Compared With Other Events

Station records per event

Station records in Cold outbreak in United States, 29 April to 4 May 2018 compared with similar events
Cold outbreak in United States and Mexico, 6 February to 5 March 2021	12,118 records
Cold outbreak in United States and Mexico, 13 October to 5 November 2020	9,841 records
Cold outbreak in United States and Mexico, 23 December 2017 to 8 January 2018	8,263 records
Cold outbreak in United States and Mexico, 3 to 23 January 2024	7,675 records
Cold outbreak in United States, 15 January to 10 February 2026	5,568 records
Cold outbreak in United States, 29 April to 4 May 2018 (this event)	108 records

Every Record Set

20 of 108

Every record set or tied during Cold outbreak in United States, 29 April to 4 May 2018, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2018-05-01	Natural Brg	Record low minimum temperature	-2.8 C (27.0 F)	0.6 C (1.1 F)	52	36 of 100 (Notable)
2018-05-01	Laveen 3 SSE	Record low maximum temperature	21.7 C (71.1 F)	1.6 C (2.9 F)	67	30 of 100 (Routine)
2018-05-01	Swan Valley	Record low maximum temperature	2.2 C (36.0 F)	1.1 C (2.0 F)	34	26 of 100 (Routine)
2018-05-02	Quartzsite	Record low maximum temperature	24.4 C (75.9 F)	1.2 C (2.2 F)	104	42 of 100 (Notable)
2018-05-02	Montezuma Castle Nm	Record low maximum temperature	13.3 C (55.9 F)	1.1 C (2.0 F)	76	33 of 100 (Routine)
2018-05-02	El Centro 2 SSW	Record low maximum temperature	21.1 C (70.0 F)	2.2 C (4.0 F)	63	31 of 100 (Routine)
2018-05-02	Glennville	Record low minimum temperature	-3.3 C (26.1 F)	1.1 C (2.0 F)	64	28 of 100 (Routine)
2018-05-02	Bunkerville	Record low maximum temperature	15.0 C (59.0 F)	3.3 C (5.9 F)	26	28 of 100 (Routine)
2018-05-02	Palomar Mtn Obsy	Record low maximum temperature	5.6 C (42.1 F)	1.6 C (2.9 F)	63	27 of 100 (Routine)
2018-05-02	Blythe ASOS	Record low maximum temperature	23.3 C (73.9 F)	1.1 C (2.0 F)	63	27 of 100 (Routine)
2018-05-02	Alpine	Record low maximum temperature	11.7 C (53.1 F)	1.1 C (2.0 F)	63	26 of 100 (Routine)
2018-05-02	Prescott Love Fld	Record low maximum temperature	10.0 C (50.0 F)	0.6 C (1.1 F)	63	26 of 100 (Routine)
2018-05-03	Jerome	Record low maximum temperature	7.8 C (46.0 F)	1.6 C (2.9 F)	112	43 of 100 (Notable)
2018-05-03	Searchlight	Record low maximum temperature	15.0 C (59.0 F)	1.7 C (3.1 F)	103	43 of 100 (Notable)
2018-05-03	Prescott	Record low maximum temperature	11.1 C (52.0 F)	0.6 C (1.1 F)	112	41 of 100 (Notable)
2018-05-03	Ferron	Record low maximum temperature	6.1 C (43.0 F)	0.6 C (1.1 F)	119	41 of 100 (Notable)
2018-05-03	Zion Np	Record low maximum temperature	13.9 C (57.0 F)	1.1 C (2.0 F)	88	38 of 100 (Notable)
2018-05-03	Eagle Mtn	Record low maximum temperature	19.4 C (66.9 F)	2.3 C (4.1 F)	59	30 of 100 (Routine)
2018-05-03	Imperial Beach Ream Fld NAS	Record low minimum temperature	7.8 C (46.0 F)	0.5 C (0.9 F)	69	29 of 100 (Routine)
2018-05-03	Hayfield Pumping Plt	Record low maximum temperature	21.1 C (70.0 F)	0.6 C (1.1 F)	59	26 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 108 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
2018-04-29	1
2018-04-30	3
2018-05-01	25
2018-05-02	49
2018-05-03	28
2018-05-04	2

Margin (C)	Years the old record stood
1.6	112
1.7	103
1.2	104
0.6	112
0.6	119
1.1	88
0.6	52
1.1	76
2.2	63
1.6	67
2.3	59
0.5	69
1.1	64
3.3	26
1.6	63
1.1	63
1.1	63
0.6	59
1.1	34
0.6	63
0.6	63
0.6	63
1.7	40
0.6	53
3.3	40
1.7	30
0.5	63
1.6	0
1.7	51
3.9	28
2.2	40
0.6	53
2.8	35
0.6	51
3.9	27
3.3	35
3.3	27
0.6	40
1.6	40
4.4	29
1.7	39
4.4	8
0.6	40
0.5	40
5.0	8
0.5	37
1.7	29
2.3	35
2.3	35
3.7	27
0.6	35
0.5	33
2.8	27
2.2	27
1.7	29
1.1	27
3.3	8
1.5	31
0.6	35
2.3	8
1.1	16
4.4	8
1.7	27
1.7	29
1.6	27
1.7	29
0.6	35
0.5	35
1.7	27
0.6	16
2.2	8
2.8	8
0.5	31
1.6	16
0.5	16
0.6	27
5.0	5
2.2	23
0.6	29
1.1	8
3.9	5
2.8	9
3.0	8
0.1	29
2.2	5
1.2	8
1.1	5
1.1	8
1.2	8
0.6	23
1.2	19
0.5	24
0.6	8
1.7	5
2.4	8
1.1	8
1.7	8
1.6	9
1.3	9
2.1	8
0.5	8
1.1	8
1.1	7
1.5	8
0.5	5
1.1	4
0.6	8
0.7	8

Margin (C)	Years the old record stood
1.6	112
1.7	103
1.2	104
0.6	112
0.6	119
1.1	88
0.6	52
1.1	76
2.2	63
1.6	67
2.3	59
0.5	69
1.1	64
3.3	26
1.6	63
1.1	63
1.1	63
0.6	59
1.1	34
0.6	63
0.6	63
0.6	63
1.7	40
0.6	53
3.3	40
1.7	30
0.5	63
1.6	0
1.7	51
3.9	28
2.2	40
0.6	53
2.8	35
0.6	51
3.9	27
3.3	35
3.3	27
0.6	40
1.6	40
4.4	29
1.7	39
4.4	8
0.6	40
0.5	40
5.0	8
0.5	37
1.7	29
2.3	35
2.3	35
3.7	27
0.6	35
0.5	33
2.8	27
2.2	27
1.7	29
1.1	27
3.3	8
1.5	31
0.6	35
2.3	8
1.1	16
4.4	8
1.7	27
1.7	29
1.6	27
1.7	29
0.6	35
0.5	35
1.7	27
0.6	16
2.2	8
2.8	8
0.5	31
1.6	16
0.5	16
0.6	27
5.0	5
2.2	23
0.6	29
1.1	8
3.9	5
2.8	9
3.0	8
0.1	29
2.2	5
1.2	8
1.1	5
1.1	8
1.2	8
0.6	23
1.2	19
0.5	24
0.6	8
1.7	5
2.4	8
1.1	8
1.7	8
1.6	9
1.3	9
2.1	8
0.5	8
1.1	8
1.1	7
1.5	8
0.5	5
1.1	4
0.6	8
0.7	8

Margin (C)	Years the old record stood
1.6	112
1.7	103
1.2	104
0.6	112
0.6	119
1.1	88
0.6	52
1.1	76
2.2	63
1.6	67
2.3	59
0.5	69
1.1	64
3.3	26
1.6	63
1.1	63
1.1	63
0.6	59
1.1	34
0.6	63
0.6	63
0.6	63
1.7	40
0.6	53
3.3	40
1.7	30
0.5	63
1.6	0
1.7	51
3.9	28
2.2	40
0.6	53
2.8	35
0.6	51
3.9	27
3.3	35
3.3	27
0.6	40
1.6	40
4.4	29
1.7	39
4.4	8
0.6	40
0.5	40
5.0	8
0.5	37
1.7	29
2.3	35
2.3	35
3.7	27
0.6	35
0.5	33
2.8	27
2.2	27
1.7	29
1.1	27
3.3	8
1.5	31
0.6	35
2.3	8
1.1	16
4.4	8
1.7	27
1.7	29
1.6	27
1.7	29
0.6	35
0.5	35
1.7	27
0.6	16
2.2	8
2.8	8
0.5	31
1.6	16
0.5	16
0.6	27
5.0	5
2.2	23
0.6	29
1.1	8
3.9	5
2.8	9
3.0	8
0.1	29
2.2	5
1.2	8
1.1	5
1.1	8
1.2	8
0.6	23
1.2	19
0.5	24
0.6	8
1.7	5
2.4	8
1.1	8
1.7	8
1.6	9
1.3	9
2.1	8
0.5	8
1.1	8
1.1	7
1.5	8
0.5	5
1.1	4
0.6	8
0.7	8