Overview Realtime Historical Map View
Heat Advisory
2026-07-20T17:00:00-04:00

* WHAT...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. * WHERE...Portions of Puerto Rico and Virgin Islands. * WHEN...Until 5 PM AST this afternoon. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Recent observations indicate that the region is experiencing hot conditions, characterized by warmer-than-normal early-morning temperatures and rapidly rising afternoon highs. The leftover moisture from yesterday's tropical wave, along with these elevated temperatures, has led to the issuance of a Heat Advisory for coastal and urban areas.

Rio Grande De Loiza At Hwy 183 San Lorenzo, Pr 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 69.16
01-02 68.52
01-03 74.8
01-04 63.61
01-05 73.02
01-06 67.52
01-07 69.38
01-08 75.58
01-09 65.21
01-10 63.25
01-11 64.9
01-12 64.12
01-13 85.22
01-14 64.82
01-15 93.51
01-16 75.92
01-17 60.27
01-18 73.9
01-19 56.13
01-20 55.32
01-21 59.35
01-22 54.93
01-23 69.75
01-24 63.47
01-25 74.97
01-26 59.92
01-27 57.29
01-28 71.73
01-29 52.63
01-30 52.31
01-31 55.39
02-01 59.93
02-02 63.13
02-03 60.66
02-04 58.55
02-05 58.63
02-06 72.23
02-07 97.81
02-08 80.09
02-09 64.56
02-10 58.52
02-11 54.71
02-12 54.26
02-13 57.79
02-14 59.83
02-15 77.77
02-16 100.78
02-17 75.76
02-18 56.37
02-19 51.68
02-20 61.09
02-21 51.65
02-22 52.28
02-23 49.93
02-24 46.44
02-25 41.29
02-26 55.68
02-27 51.2
02-28 49.46
02-29 42.95
03-01 46.81
03-02 43.82
03-03 52.29
03-04 43.28
03-05 63.77
03-06 47.99
03-07 44.86
03-08 54.87
03-09 52.0
03-10 60.2
03-11 50.68
03-12 46.18
03-13 46.62
03-14 47.72
03-15 44.21
03-16 46.16
03-17 49.03
03-18 39.37
03-19 48.27
03-20 46.75
03-21 39.84
03-22 44.64
03-23 50.15
03-24 62.34
03-25 49.68
03-26 63.98
03-27 45.71
03-28 50.42
03-29 48.98
03-30 94.83
03-31 75.31
04-01 87.83
04-02 54.17
04-03 52.39
04-04 44.24
04-05 48.88
04-06 48.61
04-07 40.39
04-08 529.45
04-09 61.75
04-10 44.56
04-11 43.06
04-12 70.04
04-13 52.95
04-14 46.19
04-15 73.26
04-16 41.76
04-17 64.03
04-18 86.06
04-19 63.09
04-20 65.5
04-21 53.86
04-22 45.18
04-23 49.87
04-24 140.53
04-25 75.96
04-26 50.86
04-27 57.23
04-28 67.65
04-29 163.57
04-30 73.17
05-01 82.08
05-02 90.01
05-03 83.42
05-04 66.24
05-05 77.28
05-06 72.99
05-07 67.92
05-08 49.84
05-09 84.33
05-10 65.88
05-11 94.82
05-12 86.35
05-13 96.02
05-14 73.08
05-15 64.07
05-16 83.35
05-17 74.22
05-18 137.84
05-19 92.86
05-20 110.85
05-21 170.37
05-22 89.31
05-23 109.51
05-24 81.61
05-25 80.47
05-26 71.21
05-27 75.79
05-28 116.41
05-29 95.32
05-30 120.65
05-31 160.21
06-01 94.59
06-02 81.28
06-03 78.8
06-04 70.0
06-05 104.48
06-06 103.99
06-07 119.78
06-08 111.59
06-09 71.87
06-10 83.52
06-11 69.66
06-12 58.65
06-13 57.41
06-14 54.48
06-15 51.69
06-16 57.15
06-17 60.89
06-18 77.01
06-19 50.51
06-20 59.3
06-21 57.95
06-22 52.52
06-23 50.8
06-24 46.83
06-25 46.7
06-26 54.94
06-27 240.05
06-28 72.88
06-29 60.76
06-30 52.9
07-01 76.49
07-02 80.48
07-03 193.89
07-04 101.36
07-05 71.11
07-06 70.31
07-07 88.33
07-08 73.48
07-09 101.54
07-10 106.21
07-11 67.26
07-12 69.86
07-13 82.86
07-14 135.22
07-15 74.72
07-16 76.56
07-17 62.24
07-18 62.23
07-19 94.83
07-20 73.07
07-21 87.2
07-22 74.94
07-23 71.29
07-24 98.96
07-25 77.24
07-26 67.44
07-27 78.98
07-28 96.17
07-29 85.23
07-30 85.44
07-31 108.2
08-01 129.54
08-02 81.04
08-03 99.98
08-04 65.03
08-05 89.35
08-06 94.61
08-07 82.2
08-08 86.2
08-09 95.98
08-10 81.47
08-11 164.56
08-12 93.73
08-13 73.5
08-14 70.37
08-15 59.2
08-16 78.16
08-17 86.78
08-18 129.67
08-19 79.73
08-20 104.99
08-21 145.32
08-22 174.81
08-23 321.79
08-24 351.65
08-25 160.11
08-26 137.36
08-27 298.09
08-28 104.41
08-29 121.65
08-30 108.2
08-31 106.28
09-01 87.21
09-02 86.96
09-03 96.67
09-04 101.46
09-05 110.76
09-06 130.71
09-07 137.24
09-08 154.14
09-09 123.83
09-10 88.61
09-11 87.98
09-12 87.2
09-13 108.28
09-14 100.75
09-15 96.26
09-16 76.85
09-17 81.91
09-18 81.86
09-19 88.94
09-20 803.82
09-21 127.32
09-22 137.23
09-23 209.76
09-24 110.91
09-25 137.58
09-26 118.63
09-27 110.29
09-28 122.96
09-29 95.81
09-30 107.99
10-01 130.47
10-02 101.53
10-03 116.73
10-04 116.9
10-05 152.81
10-06 113.91
10-07 98.32
10-08 96.38
10-09 143.9
10-10 122.55
10-11 131.96
10-12 210.36
10-13 90.55
10-14 133.3
10-15 98.68
10-16 135.24
10-17 149.36
10-18 138.61
10-19 105.99
10-20 111.74
10-21 115.31
10-22 139.56
10-23 107.94
10-24 163.34
10-25 108.59
10-26 261.2
10-27 180.95
10-28 142.21
10-29 179.3
10-30 124.77
10-31 111.65
11-01 104.85
11-02 156.25
11-03 122.59
11-04 127.71
11-05 125.61
11-06 194.19
11-07 120.02
11-08 234.62
11-09 170.22
11-10 458.79
11-11 302.55
11-12 394.07
11-13 135.24
11-14 171.44
11-15 175.26
11-16 189.31
11-17 186.89
11-18 441.8
11-19 151.95
11-20 141.73
11-21 137.54
11-22 148.49
11-23 480.58
11-24 114.25
11-25 96.28
11-26 125.76
11-27 131.92
11-28 121.07
11-29 215.17
11-30 117.3
12-01 147.67
12-02 147.59
12-03 138.53
12-04 128.83
12-05 117.07
12-06 108.88
12-07 122.03
12-08 107.13
12-09 76.17
12-10 76.02
12-11 81.31
12-12 87.04
12-13 75.73
12-14 95.13
12-15 83.91
12-16 81.94
12-17 93.92
12-18 94.74
12-19 77.73
12-20 73.14
12-21 79.31
12-22 72.52
12-23 69.8
12-24 74.15
12-25 89.61
12-26 75.98
12-27 76.58
12-28 66.39
12-29 76.5
12-30 66.95
12-31 79.18

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index