Overview Realtime Historical Map View
Extreme Heat Watch
2026-08-19T20:00:00-07:00

* WHAT...Dangerously hot conditions with temperatures ranging between 104 to 109 degrees. Major HeatRisk is expected. * WHERE...South Central Pinal County, Southeast Pinal County, Tohono O'odham Nation, Tucson Metro Area, Upper Gila River Valley, and Western Pima County. * WHEN...From Monday morning through Wednesday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

Santa Cruz River At Trico Road, Nr Marana, Az. Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011
01-01 26.25
01-02 97.85
01-03 32.61
01-04 29.2
01-05 29.49
01-06 28.38
01-07 42.8
01-08 108.6
01-09 41.27
01-10 36.33
01-11 34.13
01-12 32.87
01-13 33.52
01-14 35.35
01-15 35.07
01-16 29.33
01-17 348.21
01-18 354.8
01-19 77.39
01-20 33.08
01-21 30.39
01-22 24.78
01-23 29.53
01-24 46.4
01-25 31.86
01-26 33.16
01-27 42.37
01-28 26.77
01-29 29.14
01-30 27.81
01-31 34.6
02-01 196.45
02-02 67.4
02-03 40.53
02-04 36.64
02-05 40.94
02-06 37.13
02-07 35.92
02-08 36.92
02-09 34.5
02-10 36.21
02-11 36.4
02-12 37.04
02-13 33.24
02-14 34.06
02-15 32.28
02-16 224.23
02-17 60.76
02-18 34.86
02-19 36.2
02-20 33.25
02-21 34.35
02-22 32.11
02-23 115.12
02-24 49.88
02-25 54.81
02-26 63.85
02-27 52.81
02-28 42.42
02-29 34.3
03-01 36.77
03-02 37.93
03-03 35.63
03-04 33.66
03-05 31.18
03-06 30.07
03-07 27.56
03-08 25.94
03-09 26.5
03-10 25.32
03-11 26.5
03-12 25.15
03-13 25.16
03-14 27.08
03-15 24.76
03-16 27.56
03-17 29.27
03-18 28.74
03-19 30.72
03-20 38.04
03-21 38.9
03-22 33.79
03-23 30.93
03-24 27.09
03-25 28.34
03-26 28.23
03-27 26.32
03-28 23.94
03-29 22.52
03-30 24.99
03-31 25.36
04-01 24.73
04-02 21.66
04-03 40.41
04-04 28.75
04-05 25.88
04-06 26.99
04-07 24.99
04-08 23.74
04-09 23.91
04-10 26.69
04-11 26.98
04-12 23.52
04-13 26.56
04-14 23.54
04-15 23.56
04-16 25.27
04-17 23.74
04-18 24.93
04-19 24.35
04-20 24.57
04-21 22.56
04-22 20.21
04-23 19.71
04-24 20.86
04-25 24.5
04-26 23.84
04-27 22.94
04-28 21.78
04-29 24.36
04-30 25.43
05-01 23.87
05-02 24.23
05-03 26.88
05-04 24.69
05-05 23.39
05-06 19.52
05-07 25.41
05-08 23.15
05-09 21.94
05-10 24.24
05-11 21.93
05-12 18.72
05-13 19.79
05-14 23.06
05-15 23.07
05-16 17.82
05-17 20.2
05-18 22.05
05-19 16.98
05-20 15.07
05-21 19.76
05-22 20.37
05-23 19.42
05-24 18.15
05-25 16.5
05-26 19.82
05-27 17.0
05-28 20.24
05-29 16.06
05-30 16.83
05-31 12.17
06-01 14.05
06-02 14.65
06-03 14.13
06-04 19.66
06-05 14.99
06-06 13.82
06-07 19.45
06-08 16.56
06-09 15.08
06-10 15.47
06-11 16.78
06-12 18.04
06-13 16.41
06-14 12.52
06-15 16.54
06-16 15.82
06-17 13.6
06-18 17.41
06-19 16.79
06-20 17.57
06-21 13.75
06-22 13.12
06-23 10.83
06-24 16.43
06-25 15.12
06-26 16.13
06-27 14.56
06-28 14.2
06-29 13.06
06-30 11.6
07-01 26.38
07-02 29.52
07-03 14.14
07-04 16.76
07-05 28.25
07-06 27.79
07-07 43.0
07-08 25.17
07-09 27.79
07-10 83.3
07-11 28.72
07-12 41.92
07-13 34.3
07-14 104.86
07-15 50.27
07-16 135.69
07-17 63.14
07-18 51.28
07-19 39.88
07-20 163.3
07-21 60.3
07-22 52.26
07-23 51.76
07-24 642.13
07-25 292.76
07-26 1096.71
07-27 223.32
07-28 134.85
07-29 116.74
07-30 244.02
07-31 89.61
08-01 130.1
08-02 108.26
08-03 87.53
08-04 62.32
08-05 32.12
08-06 30.01
08-07 34.86
08-08 26.39
08-09 36.16
08-10 278.19
08-11 83.45
08-12 120.92
08-13 112.01
08-14 164.35
08-15 181.28
08-16 95.89
08-17 64.6
08-18 165.18
08-19 99.87
08-20 168.0
08-21 456.57
08-22 154.59
08-23 82.79
08-24 46.56
08-25 38.99
08-26 40.29
08-27 58.2
08-28 36.06
08-29 28.08
08-30 28.45
08-31 30.08
09-01 35.7
09-02 103.84
09-03 35.77
09-04 235.13
09-05 32.23
09-06 34.71
09-07 28.1
09-08 44.41
09-09 867.06
09-10 32.11
09-11 60.29
09-12 33.85
09-13 41.15
09-14 21.91
09-15 29.12
09-16 272.32
09-17 27.13
09-18 19.72
09-19 26.9
09-20 232.25
09-21 46.0
09-22 53.53
09-23 29.17
09-24 20.47
09-25 91.9
09-26 29.6
09-27 30.13
09-28 22.25
09-29 32.65
09-30 24.32
10-01 30.26
10-02 24.51
10-03 26.34
10-04 22.65
10-05 37.35
10-06 35.99
10-07 23.73
10-08 25.02
10-09 28.99
10-10 65.19
10-11 26.36
10-12 23.05
10-13 29.18
10-14 252.54
10-15 49.73
10-16 28.83
10-17 22.38
10-18 21.99
10-19 23.47
10-20 25.26
10-21 33.44
10-22 22.52
10-23 34.66
10-24 26.31
10-25 44.21
10-26 30.48
10-27 26.62
10-28 27.58
10-29 22.89
10-30 24.21
10-31 26.09
11-01 25.56
11-02 28.5
11-03 26.67
11-04 26.42
11-05 25.77
11-06 28.69
11-07 30.95
11-08 31.46
11-09 29.08
11-10 26.16
11-11 26.15
11-12 27.5
11-13 25.06
11-14 34.06
11-15 27.88
11-16 26.02
11-17 27.68
11-18 29.54
11-19 28.36
11-20 28.93
11-21 27.08
11-22 43.3
11-23 48.9
11-24 84.11
11-25 37.25
11-26 32.42
11-27 29.57
11-28 28.82
11-29 30.11
11-30 56.53
12-01 33.31
12-02 31.41
12-03 25.79
12-04 24.29
12-05 28.77
12-06 29.37
12-07 28.56
12-08 32.77
12-09 30.46
12-10 37.27
12-11 27.79
12-12 27.52
12-13 29.78
12-14 70.35
12-15 31.14
12-16 24.59
12-17 29.66
12-18 25.37
12-19 26.92
12-20 31.75
12-21 28.0
12-22 30.08
12-23 27.74
12-24 28.94
12-25 34.49
12-26 20.06
12-27 26.12
12-28 27.86
12-29 24.46
12-30 24.94
12-31 25.5

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index