Heat wave in United States and Mexico, 13 April to 5 May 2019

Name: Heat wave in United States and Mexico, 13 April to 5 May 2019
Start: 2019-04-13
End: 2019-05-05
Location: United States, Mexico

Heat wave in United States and Mexico, 13 April to 5 May 2019: 1,011 records at 684 stations, peak on 20 April 2019. Closed.

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

Key Facts

Heat wave in United States and Mexico, 13 April to 5 May 2019 set or tied 1,011 station records at 684 stations.
It ran from 13 April 2019 to 5 May 2019 (23 days) and its peak day was 20 April 2019.
Status: closed.
Wittmann 1SE set a monthly record high minimum temperature of 21.7 C (71.1 F) on 29 April 2019.
The busiest day was 20 April 2019 with 145 records.
The oldest broken record in the ranked list had stood for 124 years.

Footprint

13 April to 5 May 2019

The area covered by Heat wave in United States and Mexico, 13 April to 5 May 2019 is outlined, with 19 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Heat wave in United States and Mexico, 13 April to 5 May 2019: stations that set records in the event
Station	Type	Value	Date
Wittmann 1SE	Record high minimum temperature	21.7 C (71.1 F)	2019-04-29
Spokane Intl AP	Record high minimum temperature	12.2 C (54.0 F)	2019-04-19
Petaluma AP	Record high maximum temperature	31.1 C (88.0 F)	2019-04-24
Auberry 2 NW	Record high minimum temperature	18.9 C (66.0 F)	2019-04-25
Mtn Park	Record high maximum temperature	30.6 C (87.1 F)	2019-05-01
Mc Henry 3W	Record high minimum temperature	10.0 C (50.0 F)	2019-04-20
Primghar	Record high minimum temperature	15.0 C (59.0 F)	2019-04-21
Santa Rosa	Record high maximum temperature	33.9 C (93.0 F)	2019-04-23
Great Falls 16St	Record high minimum temperature	11.7 C (53.1 F)	2019-04-23
Missoula 6 NW WFO	Record high minimum temperature	8.9 C (48.0 F)	2019-04-23
Ft Lewis	Record high minimum temperature	5.6 C (42.1 F)	2019-04-25
Richfield Radio Ksvc	Record high maximum temperature	28.9 C (84.0 F)	2019-04-15
Elko Rgnl AP	Record high minimum temperature	6.1 C (43.0 F)	2019-04-15
Forks 1 E	Record high minimum temperature	8.9 C (48.0 F)	2019-04-18
Cody	Record high minimum temperature	13.3 C (55.9 F)	2019-04-20
Healdsburg	Record high maximum temperature	36.7 C (98.1 F)	2019-04-23
Newman	Record high maximum temperature	37.8 C (100.0 F)	2019-04-25
Merced	Record high minimum temperature	15.6 C (60.1 F)	2019-04-24
Natural Brg	Record high maximum temperature	28.3 C (82.9 F)	2019-04-27

Records per Day

Peak day 145

Records set or tied each day from 13 April 2019 to 5 May 2019. The most in one day was 145 on 20 April 2019.

Records per day during Heat wave in United States and Mexico, 13 April to 5 May 2019
Date	Records
2019-04-13	2
2019-04-14	6
2019-04-15	28
2019-04-16	26
2019-04-17	6
2019-04-18	40
2019-04-19	122
2019-04-20	145
2019-04-21	65
2019-04-22	16
2019-04-23	95
2019-04-24	122
2019-04-25	99
2019-04-26	79
2019-04-27	58
2019-04-28	31
2019-04-29	22
2019-04-30	20
2019-05-01	21
2019-05-02	4
2019-05-03	3
2019-05-05	1

Top Records by Margin

Margin over the record replaced

Top records of Heat wave in United States and Mexico, 13 April to 5 May 2019 ranked by margin
Auberry 2 NW, 04-25	2.8 C (5.0 F)
Mtn Park, 05-01	2.8 C (5.0 F)
Spokane Intl AP, 04-19	2.2 C (4.0 F)
Wittmann 1SE, 04-29	1.7 C (3.1 F)
Petaluma AP, 04-24	1.7 C (3.1 F)
Santa Rosa, 04-23	1.7 C (3.1 F)
Primghar, 04-21	1.7 C (3.1 F)
Great Falls 16St, 04-23	1.7 C (3.1 F)
Mc Henry 3W, 04-20	1.7 C (3.1 F)
Ft Lewis, 04-25	1.2 C (2.2 F)
Newman, 04-26	1.2 C (2.2 F)
Merced, 04-24	1.2 C (2.2 F)
Missoula 6 NW WFO, 04-23	1.1 C (2.0 F)
Healdsburg, 04-23	1.1 C (2.0 F)
Newman, 04-25	1.1 C (2.0 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

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 Heat wave in United States and Mexico, 13 April to 5 May 2019
Margin (C)	Years the old record stood
1.7	80
2.2	110
2.8	92
1.7	105
2.8	90
1.7	108
1.2	100
1.7	116
1.7	112
1.1	112
1.7	100
1.1	105
1.2	105
1.1	105
1.1	112
0.6	104
1.1	104
1.1	104
0.5	102
1.2	92
0.6	101
0.6	105
0.5	108
1.1	120
0.5	124
3.3	82
0.6	120
0.6	108
1.1	92
0.6	96
2.8	82
1.1	92
0.6	92
1.6	84
0.6	92
1.1	88
1.1	86
0.5	93
0.6	92
3.9	66
1.7	73
1.1	61
1.7	55
1.1	84
0.5	85
1.1	80
0.6	80
1.6	72
1.1	77
1.1	76
0.6	80
0.5	80
2.8	72
1.1	73
2.2	72
2.2	64
0.6	82
2.8	66
0.6	78
2.7	69
1.1	73
1.1	72
0.6	73
1.2	66
1.1	72
2.2	56
0.6	80
2.2	60
2.2	72
2.2	65
0.5	70
2.2	60
0.5	72
0.5	73
2.2	66
0.6	76
2.2	68
2.3	56
8.3	24
2.3	64
1.7	72
3.4	65
3.9	52
1.1	66
1.1	66
0.6	66
1.7	29
1.1	69
1.1	74
0.5	69
3.9	37
0.6	76
1.1	72
2.2	56
1.1	72
2.2	58
1.6	26
3.4	41
1.1	72
1.1	66
0.5	72
0.6	66
1.1	60
5.5	37
0.6	68
1.6	69
0.5	72
1.7	60
0.6	72
0.6	69
0.6	30
0.6	72
1.1	53
0.6	69
1.1	64
2.2	56
1.1	56
3.4	52
0.5	72
3.4	38
0.5	56
1.1	53
0.6	69
0.6	56
1.7	60
0.6	58
0.6	56
1.1	64
0.6	65
1.7	50
1.1	65
2.2	53
1.1	60
2.7	52
1.1	65
1.1	53
3.3	45
1.7	40
1.1	65
1.7	53
0.6	53
0.6	56
0.6	58
1.1	56
1.1	56
0.6	62
0.5	65
0.5	64
1.1	60
3.4	53
3.9	26
0.6	65
2.3	52
1.7	52
1.1	60
0.5	38
2.8	42
2.2	52
1.1	26
2.2	50
0.6	56
2.2	49
1.1	56
2.2	53
1.1	26
0.6	52
0.6	60
6.6	22
0.5	64
1.1	62
1.7	50
0.5	65
0.6	28
0.6	56
1.1	56
0.5	52
2.2	52
3.4	37
1.1	53
5.0	26
4.5	20
0.6	49
1.1	56
4.4	28
0.6	48
0.5	52
0.5	62
0.5	56
1.7	52
1.6	56
1.6	38
1.7	52
2.2	37
0.6	56
1.1	37
2.2	52
2.8	45
0.6	45
1.7	52
1.1	52

Compared With Other Events

Station records per event

Station records in Heat wave in United States and Mexico, 13 April to 5 May 2019 compared with similar events
Heat wave in United States and Mexico, 16 January to 14 February 2024	9,869 records
Heat wave in United States, 28 January to 24 February 2026	6,528 records
Heat wave in United States and Mexico, 24 May to 19 June 2020	5,047 records
Heat wave in United States and Mexico, 26 March to 17 April 2021	3,669 records
Heat wave in Germany and 49 other countries, 18 December 2021 to 15 January 2022	3,626 records
Heat wave in United States and Mexico, 13 April to 5 May 2019 (this event)	1,011 records

Every Record Set

20 of 1,011

Every record set or tied during Heat wave in United States and Mexico, 13 April to 5 May 2019, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2019-04-15	Richfield Radio Ksvc	Record high maximum temperature	28.9 C (84.0 F)	1.1 C (2.0 F)	112	42 of 100 (Notable)
2019-04-15	Elko Rgnl AP	Record high minimum temperature	6.1 C (43.0 F)	1.1 C (2.0 F)	104	42 of 100 (Notable)
2019-04-18	Forks 1 E	Record high minimum temperature	8.9 C (48.0 F)	0.6 C (1.1 F)	104	42 of 100 (Notable)
2019-04-19	Spokane Intl AP	Record high minimum temperature	12.2 C (54.0 F)	2.2 C (4.0 F)	110	46 of 100 (Notable)
2019-04-20	Mc Henry 3W	Record high minimum temperature	10.0 C (50.0 F)	1.7 C (3.1 F)	100	43 of 100 (Notable)
2019-04-20	Cody	Record high minimum temperature	13.3 C (55.9 F)	1.1 C (2.0 F)	104	42 of 100 (Notable)
2019-04-21	Primghar	Record high minimum temperature	15.0 C (59.0 F)	1.7 C (3.1 F)	116	43 of 100 (Notable)
2019-04-23	Santa Rosa	Record high maximum temperature	33.9 C (93.0 F)	1.7 C (3.1 F)	108	43 of 100 (Notable)
2019-04-23	Great Falls 16St	Record high minimum temperature	11.7 C (53.1 F)	1.7 C (3.1 F)	112	43 of 100 (Notable)
2019-04-23	Missoula 6 NW WFO	Record high minimum temperature	8.9 C (48.0 F)	1.1 C (2.0 F)	112	43 of 100 (Notable)
2019-04-23	Healdsburg	Record high maximum temperature	36.7 C (98.1 F)	1.1 C (2.0 F)	105	42 of 100 (Notable)
2019-04-24	Petaluma AP	Record high maximum temperature	31.1 C (88.0 F)	1.7 C (3.1 F)	105	44 of 100 (Notable)
2019-04-24	Merced	Record high minimum temperature	15.6 C (60.1 F)	1.2 C (2.2 F)	92	41 of 100 (Notable)
2019-04-25	Auberry 2 NW	Record high minimum temperature	18.9 C (66.0 F)	2.8 C (5.0 F)	92	44 of 100 (Notable)
2019-04-25	Ft Lewis	Record high minimum temperature	5.6 C (42.1 F)	1.2 C (2.2 F)	100	43 of 100 (Notable)
2019-04-25	Newman	Record high maximum temperature	37.8 C (100.0 F)	1.1 C (2.0 F)	105	42 of 100 (Notable)
2019-04-26	Newman	Record high maximum temperature	35.6 C (96.1 F)	1.2 C (2.2 F)	105	42 of 100 (Notable)
2019-04-27	Natural Brg	Record high maximum temperature	28.3 C (82.9 F)	0.5 C (0.9 F)	102	41 of 100 (Notable)
2019-04-29	Wittmann 1SE	Record high minimum temperature	21.7 C (71.1 F)	1.7 C (3.1 F)	80	47 of 100 (Notable)
2019-05-01	Mtn Park	Record high maximum temperature	30.6 C (87.1 F)	2.8 C (5.0 F)	90	44 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 1,011 records the event counts. The counts above use the full total.

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 (C)	Years the old record stood
1.7	80
2.2	110
2.8	92
1.7	105
2.8	90
1.7	108
1.2	100
1.7	116
1.7	112
1.1	112
1.7	100
1.1	105
1.2	105
1.1	105
1.1	112
0.6	104
1.1	104
1.1	104
0.5	102
1.2	92
0.6	101
0.6	105
0.5	108
1.1	120
0.5	124
3.3	82
0.6	120
0.6	108
1.1	92
0.6	96
2.8	82
1.1	92
0.6	92
1.6	84
0.6	92
1.1	88
1.1	86
0.5	93
0.6	92
3.9	66
1.7	73
1.1	61
1.7	55
1.1	84
0.5	85
1.1	80
0.6	80
1.6	72
1.1	77
1.1	76
0.6	80
0.5	80
2.8	72
1.1	73
2.2	72
2.2	64
0.6	82
2.8	66
0.6	78
2.7	69
1.1	73
1.1	72
0.6	73
1.2	66
1.1	72
2.2	56
0.6	80
2.2	60
2.2	72
2.2	65
0.5	70
2.2	60
0.5	72
0.5	73
2.2	66
0.6	76
2.2	68
2.3	56
8.3	24
2.3	64
1.7	72
3.4	65
3.9	52
1.1	66
1.1	66
0.6	66
1.7	29
1.1	69
1.1	74
0.5	69
3.9	37
0.6	76
1.1	72
2.2	56
1.1	72
2.2	58
1.6	26
3.4	41
1.1	72
1.1	66
0.5	72
0.6	66
1.1	60
5.5	37
0.6	68
1.6	69
0.5	72
1.7	60
0.6	72
0.6	69
0.6	30
0.6	72
1.1	53
0.6	69
1.1	64
2.2	56
1.1	56
3.4	52
0.5	72
3.4	38
0.5	56
1.1	53
0.6	69
0.6	56
1.7	60
0.6	58
0.6	56
1.1	64
0.6	65
1.7	50
1.1	65
2.2	53
1.1	60
2.7	52
1.1	65
1.1	53
3.3	45
1.7	40
1.1	65
1.7	53
0.6	53
0.6	56
0.6	58
1.1	56
1.1	56
0.6	62
0.5	65
0.5	64
1.1	60
3.4	53
3.9	26
0.6	65
2.3	52
1.7	52
1.1	60
0.5	38
2.8	42
2.2	52
1.1	26
2.2	50
0.6	56
2.2	49
1.1	56
2.2	53
1.1	26
0.6	52
0.6	60
6.6	22
0.5	64
1.1	62
1.7	50
0.5	65
0.6	28
0.6	56
1.1	56
0.5	52
2.2	52
3.4	37
1.1	53
5.0	26
4.5	20
0.6	49
1.1	56
4.4	28
0.6	48
0.5	52
0.5	62
0.5	56
1.7	52
1.6	56
1.6	38
1.7	52
2.2	37
0.6	56
1.1	37
2.2	52
2.8	45
0.6	45
1.7	52
1.1	52

Margin (C)	Years the old record stood
1.7	80
2.2	110
2.8	92
1.7	105
2.8	90
1.7	108
1.2	100
1.7	116
1.7	112
1.1	112
1.7	100
1.1	105
1.2	105
1.1	105
1.1	112
0.6	104
1.1	104
1.1	104
0.5	102
1.2	92
0.6	101
0.6	105
0.5	108
1.1	120
0.5	124
3.3	82
0.6	120
0.6	108
1.1	92
0.6	96
2.8	82
1.1	92
0.6	92
1.6	84
0.6	92
1.1	88
1.1	86
0.5	93
0.6	92
3.9	66
1.7	73
1.1	61
1.7	55
1.1	84
0.5	85
1.1	80
0.6	80
1.6	72
1.1	77
1.1	76
0.6	80
0.5	80
2.8	72
1.1	73
2.2	72
2.2	64
0.6	82
2.8	66
0.6	78
2.7	69
1.1	73
1.1	72
0.6	73
1.2	66
1.1	72
2.2	56
0.6	80
2.2	60
2.2	72
2.2	65
0.5	70
2.2	60
0.5	72
0.5	73
2.2	66
0.6	76
2.2	68
2.3	56
8.3	24
2.3	64
1.7	72
3.4	65
3.9	52
1.1	66
1.1	66
0.6	66
1.7	29
1.1	69
1.1	74
0.5	69
3.9	37
0.6	76
1.1	72
2.2	56
1.1	72
2.2	58
1.6	26
3.4	41
1.1	72
1.1	66
0.5	72
0.6	66
1.1	60
5.5	37
0.6	68
1.6	69
0.5	72
1.7	60
0.6	72
0.6	69
0.6	30
0.6	72
1.1	53
0.6	69
1.1	64
2.2	56
1.1	56
3.4	52
0.5	72
3.4	38
0.5	56
1.1	53
0.6	69
0.6	56
1.7	60
0.6	58
0.6	56
1.1	64
0.6	65
1.7	50
1.1	65
2.2	53
1.1	60
2.7	52
1.1	65
1.1	53
3.3	45
1.7	40
1.1	65
1.7	53
0.6	53
0.6	56
0.6	58
1.1	56
1.1	56
0.6	62
0.5	65
0.5	64
1.1	60
3.4	53
3.9	26
0.6	65
2.3	52
1.7	52
1.1	60
0.5	38
2.8	42
2.2	52
1.1	26
2.2	50
0.6	56
2.2	49
1.1	56
2.2	53
1.1	26
0.6	52
0.6	60
6.6	22
0.5	64
1.1	62
1.7	50
0.5	65
0.6	28
0.6	56
1.1	56
0.5	52
2.2	52
3.4	37
1.1	53
5.0	26
4.5	20
0.6	49
1.1	56
4.4	28
0.6	48
0.5	52
0.5	62
0.5	56
1.7	52
1.6	56
1.6	38
1.7	52
2.2	37
0.6	56
1.1	37
2.2	52
2.8	45
0.6	45
1.7	52
1.1	52