Overview Realtime Historical Map View
Heat Advisory
2026-07-15T20:00:00-04:00

* WHAT...Heat index values up to 102 expected. * WHERE...Portions of east central Ohio, northwest, southwest, and western Pennsylvania, and northern and the northern panhandle of West Virginia. * WHEN...From noon today to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Monongahela River Near Masontown, Pa 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 11548.33
01-02 15147.5
01-03 14722.5
01-04 13475.0
01-05 11738.33
01-06 10373.33
01-07 9544.17
01-08 9032.5
01-09 8258.33
01-10 11940.83
01-11 11359.17
01-12 10017.5
01-13 11990.83
01-14 12952.5
01-15 11750.0
01-16 10028.33
01-17 11491.54
01-18 11735.38
01-19 11626.92
01-20 11983.85
01-21 11979.23
01-22 9524.62
01-23 9582.5
01-24 8139.17
01-25 10540.83
01-26 13460.0
01-27 12510.0
01-28 12030.0
01-29 13797.69
01-30 12435.0
01-31 11065.0
02-01 14264.29
02-02 15470.0
02-03 13670.71
02-04 17042.14
02-05 16852.14
02-06 16852.31
02-07 14533.08
02-08 15050.77
02-09 15204.29
02-10 12916.43
02-11 15880.77
02-12 16625.0
02-13 13978.57
02-14 15790.0
02-15 12977.14
02-16 13600.77
02-17 22575.38
02-18 16246.92
02-19 15990.0
02-20 15340.0
02-21 16692.14
02-22 15709.29
02-23 14486.43
02-24 14902.14
02-25 14920.0
02-26 16078.46
02-27 15873.57
02-28 15137.86
02-29 16695.0
03-01 21635.0
03-02 19227.14
03-03 15537.14
03-04 16526.43
03-05 22605.0
03-06 17357.14
03-07 14892.86
03-08 13474.29
03-09 11310.71
03-10 12621.43
03-11 12544.29
03-12 15244.29
03-13 13336.43
03-14 12145.0
03-15 12893.57
03-16 11917.86
03-17 9710.71
03-18 9046.43
03-19 8814.67
03-20 10046.43
03-21 8432.0
03-22 6506.43
03-23 6593.33
03-24 7231.33
03-25 7794.67
03-26 8338.0
03-27 7049.33
03-28 9000.67
03-29 9376.0
03-30 9091.33
03-31 8585.0
04-01 9167.33
04-02 12515.33
04-03 12799.33
04-04 18367.33
04-05 15317.33
04-06 12477.33
04-07 13264.67
04-08 12709.33
04-09 12627.86
04-10 13590.67
04-11 14772.67
04-12 11121.43
04-13 10015.0
04-14 8665.0
04-15 9616.15
04-16 11363.85
04-17 14496.15
04-18 10076.92
04-19 10933.08
04-20 10084.92
04-21 9812.14
04-22 9210.0
04-23 8659.29
04-24 7713.57
04-25 6746.15
04-26 7544.29
04-27 8417.14
04-28 8249.29
04-29 8045.0
04-30 8815.0
05-01 11024.0
05-02 8823.57
05-03 11329.29
05-04 10560.0
05-05 13284.0
05-06 15598.0
05-07 18466.0
05-08 17460.0
05-09 15786.0
05-10 15699.33
05-11 12110.67
05-12 10687.33
05-13 9390.67
05-14 8681.43
05-15 10656.43
05-16 10227.86
05-17 11658.57
05-18 10985.33
05-19 11151.33
05-20 9812.86
05-21 7820.67
05-22 7906.0
05-23 10098.0
05-24 9168.0
05-25 7069.33
05-26 7728.0
05-27 5649.33
05-28 8372.67
05-29 11140.67
05-30 8452.0
05-31 9348.0
06-01 7438.2
06-02 5907.33
06-03 5450.0
06-04 5090.67
06-05 4610.21
06-06 4336.0
06-07 3954.07
06-08 4600.8
06-09 4184.2
06-10 3795.53
06-11 3695.33
06-12 3870.0
06-13 4155.71
06-14 5720.0
06-15 6460.67
06-16 6112.47
06-17 5567.0
06-18 4974.0
06-19 6713.57
06-20 6337.14
06-21 6799.29
06-22 8124.29
06-23 8314.29
06-24 7489.57
06-25 5313.07
06-26 5054.29
06-27 4355.0
06-28 5187.29
06-29 8420.43
06-30 5929.29
07-01 6052.14
07-02 4387.14
07-03 4154.29
07-04 3078.57
07-05 3043.13
07-06 3732.87
07-07 2640.71
07-08 3088.5
07-09 3779.93
07-10 5632.93
07-11 6001.6
07-12 5923.73
07-13 4400.64
07-14 4045.93
07-15 4686.0
07-16 3831.85
07-17 3007.79
07-18 2727.86
07-19 2982.57
07-20 2857.36
07-21 2722.86
07-22 3150.21
07-23 4026.43
07-24 4522.07
07-25 4485.86
07-26 3889.29
07-27 3331.0
07-28 3643.57
07-29 7339.93
07-30 11718.29
07-31 4987.29
08-01 4211.67
08-02 3939.29
08-03 3815.71
08-04 3289.07
08-05 3095.29
08-06 2539.79
08-07 2686.0
08-08 3361.85
08-09 3254.08
08-10 4519.62
08-11 4244.43
08-12 3860.93
08-13 2970.14
08-14 4756.43
08-15 3810.07
08-16 3163.31
08-17 3688.69
08-18 3058.33
08-19 3044.62
08-20 2493.08
08-21 2074.31
08-22 2300.25
08-23 2756.21
08-24 3872.15
08-25 2975.62
08-26 2757.0
08-27 2411.0
08-28 2283.0
08-29 3933.29
08-30 4899.21
08-31 4409.93
09-01 3686.14
09-02 5489.57
09-03 3897.86
09-04 3022.71
09-05 2996.14
09-06 3427.93
09-07 6919.36
09-08 4206.5
09-09 3565.86
09-10 6008.21
09-11 5131.14
09-12 3546.5
09-13 3292.14
09-14 2666.07
09-15 2124.07
09-16 2611.64
09-17 2022.43
09-18 2524.43
09-19 3923.21
09-20 2731.43
09-21 2988.29
09-22 2533.08
09-23 2447.57
09-24 2372.71
09-25 2106.36
09-26 4092.14
09-27 3400.93
09-28 5370.64
09-29 5508.0
09-30 4369.0
10-01 2619.15
10-02 2681.92
10-03 3585.38
10-04 4055.38
10-05 4170.5
10-06 4055.21
10-07 3757.36
10-08 2763.14
10-09 3218.92
10-10 2637.86
10-11 2121.79
10-12 2891.86
10-13 3432.86
10-14 3252.64
10-15 4089.23
10-16 4537.93
10-17 4317.64
10-18 3866.0
10-19 3758.93
10-20 2716.0
10-21 2707.08
10-22 4565.0
10-23 4176.79
10-24 4132.07
10-25 3803.14
10-26 3379.0
10-27 3260.0
10-28 4686.07
10-29 4313.29
10-30 7881.0
10-31 8615.38
11-01 6967.69
11-02 6485.71
11-03 5741.43
11-04 5269.29
11-05 4269.23
11-06 4983.85
11-07 6087.69
11-08 6344.92
11-09 6034.62
11-10 6562.31
11-11 5828.46
11-12 6024.62
11-13 8441.54
11-14 7764.29
11-15 6064.29
11-16 6976.43
11-17 7538.57
11-18 6810.0
11-19 6238.46
11-20 7078.33
11-21 5517.86
11-22 6200.77
11-23 7544.29
11-24 9377.69
11-25 7289.23
11-26 6055.0
11-27 7297.86
11-28 6705.0
11-29 5758.57
11-30 6349.29
12-01 6290.71
12-02 7290.43
12-03 8367.14
12-04 7583.57
12-05 7807.86
12-06 8531.54
12-07 12644.29
12-08 14713.57
12-09 11564.29
12-10 11284.29
12-11 13464.29
12-12 11621.43
12-13 11188.57
12-14 10384.62
12-15 9791.54
12-16 11143.85
12-17 11473.85
12-18 14100.0
12-19 10528.46
12-20 10436.67
12-21 10456.67
12-22 12083.08
12-23 11176.92
12-24 10016.15
12-25 12710.0
12-26 12034.62
12-27 12881.67
12-28 13865.83
12-29 11166.36
12-30 13641.67
12-31 13009.17

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index