Overview Realtime Historical Map View
Heat Advisory
2026-07-16T20:00:00-04:00

* WHAT...Heat index values around 100. * WHERE...Portions of north central and western Maryland, northwest Virginia, and eastern West Virginia. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Spout Run At Rt 621 Near Millwood, Va 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 22.23
01-02 22.53
01-03 21.38
01-04 19.69
01-05 19.32
01-06 19.97
01-07 19.83
01-08 17.93
01-09 18.39
01-10 19.47
01-11 19.04
01-12 20.62
01-13 19.49
01-14 19.04
01-15 18.66
01-16 18.26
01-17 18.49
01-18 17.76
01-19 16.88
01-20 20.09
01-21 20.37
01-22 18.24
01-23 18.12
01-24 18.86
01-25 23.05
01-26 19.66
01-27 18.61
01-28 18.21
01-29 20.52
01-30 17.96
01-31 38.05
02-01 21.36
02-02 19.29
02-03 18.69
02-04 32.92
02-05 26.37
02-06 36.65
02-07 23.99
02-08 22.22
02-09 21.16
02-10 21.6
02-11 19.27
02-12 20.25
02-13 25.29
02-14 24.36
02-15 21.88
02-16 21.33
02-17 26.34
02-18 22.51
02-19 22.0
02-20 23.14
02-21 26.82
02-22 30.87
02-23 25.41
02-24 26.51
02-25 34.2
02-26 26.8
02-27 24.7
02-28 24.1
02-29 23.15
03-01 27.61
03-02 26.32
03-03 24.92
03-04 25.37
03-05 26.8
03-06 24.42
03-07 23.55
03-08 23.61
03-09 28.36
03-10 30.46
03-11 25.49
03-12 24.46
03-13 25.81
03-14 24.76
03-15 23.26
03-16 22.54
03-17 22.89
03-18 21.94
03-19 21.91
03-20 20.15
03-21 21.0
03-22 47.46
03-23 24.08
03-24 22.69
03-25 22.07
03-26 21.73
03-27 21.61
03-28 21.13
03-29 20.82
03-30 20.95
03-31 25.54
04-01 22.57
04-02 21.27
04-03 21.02
04-04 22.65
04-05 20.8
04-06 20.64
04-07 21.02
04-08 23.27
04-09 20.75
04-10 20.23
04-11 20.57
04-12 20.83
04-13 20.54
04-14 20.05
04-15 25.1
04-16 21.86
04-17 21.58
04-18 20.74
04-19 20.25
04-20 47.72
04-21 21.56
04-22 19.99
04-23 19.97
04-24 19.51
04-25 19.42
04-26 20.16
04-27 19.1
04-28 18.57
04-29 18.74
04-30 18.88
05-01 21.37
05-02 20.21
05-03 19.65
05-04 34.49
05-05 22.9
05-06 32.87
05-07 28.61
05-08 25.69
05-09 22.86
05-10 21.35
05-11 20.9
05-12 23.85
05-13 21.73
05-14 23.95
05-15 28.82
05-16 29.01
05-17 35.1
05-18 46.31
05-19 37.2
05-20 33.25
05-21 26.29
05-22 25.01
05-23 25.81
05-24 26.35
05-25 23.11
05-26 29.21
05-27 23.37
05-28 24.48
05-29 24.03
05-30 22.44
05-31 22.25
06-01 24.07
06-02 21.77
06-03 32.89
06-04 37.54
06-05 25.88
06-06 22.75
06-07 22.61
06-08 22.5
06-09 22.03
06-10 22.95
06-11 24.9
06-12 22.24
06-13 20.41
06-14 35.94
06-15 20.43
06-16 19.17
06-17 18.78
06-18 18.32
06-19 18.52
06-20 18.15
06-21 18.38
06-22 17.36
06-23 25.6
06-24 24.8
06-25 18.73
06-26 16.96
06-27 20.04
06-28 17.31
06-29 16.8
06-30 16.27
07-01 15.81
07-02 16.48
07-03 15.81
07-04 16.48
07-05 16.42
07-06 15.7
07-07 15.85
07-08 15.7
07-09 16.13
07-10 16.03
07-11 14.76
07-12 14.82
07-13 14.46
07-14 14.35
07-15 15.1
07-16 19.58
07-17 15.22
07-18 14.91
07-19 14.31
07-20 14.69
07-21 14.44
07-22 15.23
07-23 15.01
07-24 14.9
07-25 16.86
07-26 16.93
07-27 14.25
07-28 13.73
07-29 16.47
07-30 14.16
07-31 16.52
08-01 14.5
08-02 16.26
08-03 22.48
08-04 28.74
08-05 17.06
08-06 15.77
08-07 15.73
08-08 16.04
08-09 14.81
08-10 13.95
08-11 14.94
08-12 14.02
08-13 13.32
08-14 14.03
08-15 13.29
08-16 12.99
08-17 12.83
08-18 13.23
08-19 13.19
08-20 12.74
08-21 13.15
08-22 13.98
08-23 13.25
08-24 13.5
08-25 12.69
08-26 12.44
08-27 12.29
08-28 12.33
08-29 13.18
08-30 12.54
08-31 12.52
09-01 12.5
09-02 15.91
09-03 13.32
09-04 12.76
09-05 12.54
09-06 12.74
09-07 14.15
09-08 13.62
09-09 13.82
09-10 33.12
09-11 20.28
09-12 16.78
09-13 17.65
09-14 15.26
09-15 14.63
09-16 14.22
09-17 14.0
09-18 14.85
09-19 14.38
09-20 13.44
09-21 13.23
09-22 13.91
09-23 13.38
09-24 17.5
09-25 15.69
09-26 16.01
09-27 15.36
09-28 39.08
09-29 21.8
09-30 20.01
10-01 12.82
10-02 13.1
10-03 13.24
10-04 13.08
10-05 15.03
10-06 14.59
10-07 14.11
10-08 14.78
10-09 15.02
10-10 14.93
10-11 15.36
10-12 18.18
10-13 16.42
10-14 17.92
10-15 16.06
10-16 15.33
10-17 14.23
10-18 14.06
10-19 14.07
10-20 13.43
10-21 13.11
10-22 13.52
10-23 13.94
10-24 12.92
10-25 13.24
10-26 12.93
10-27 13.19
10-28 13.32
10-29 13.03
10-30 19.31
10-31 17.02
11-01 14.21
11-02 13.35
11-03 15.99
11-04 13.57
11-05 11.64
11-06 13.57
11-07 15.38
11-08 13.7
11-09 12.9
11-10 17.32
11-11 14.11
11-12 14.63
11-13 15.17
11-14 15.11
11-15 14.42
11-16 16.74
11-17 22.84
11-18 20.71
11-19 17.27
11-20 15.76
11-21 14.24
11-22 14.74
11-23 13.75
11-24 14.26
11-25 36.55
11-26 15.95
11-27 15.54
11-28 14.53
11-29 13.49
11-30 14.09
12-01 14.07
12-02 14.08
12-03 13.39
12-04 12.76
12-05 12.9
12-06 13.05
12-07 13.85
12-08 16.49
12-09 14.51
12-10 14.84
12-11 14.67
12-12 13.83
12-13 13.38
12-14 13.1
12-15 13.97
12-16 43.86
12-17 23.16
12-18 19.16
12-19 17.07
12-20 16.12
12-21 18.32
12-22 21.8
12-23 24.27
12-24 19.7
12-25 31.61
12-26 22.03
12-27 19.82
12-28 17.99
12-29 21.82
12-30 36.63
12-31 22.31

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index