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

* WHAT...Heat index values up to 100 expected. * WHERE...Portions of east central Ohio, northwest, southwest, and western Pennsylvania, and northern and the northern panhandle of West Virginia. * WHEN...From noon to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Allegheny River At Natrona, 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 36850.0
01-02 38950.0
01-03 36808.33
01-04 35991.67
01-05 34133.33
01-06 33663.64
01-07 29766.67
01-08 27866.67
01-09 25083.33
01-10 25650.0
01-11 28283.33
01-12 30758.33
01-13 33483.33
01-14 35316.67
01-15 35050.0
01-16 31941.67
01-17 30776.92
01-18 29023.08
01-19 28982.31
01-20 27784.62
01-21 27507.69
01-22 24546.15
01-23 23250.0
01-24 22766.92
01-25 25246.92
01-26 29150.83
01-27 29773.33
01-28 31935.0
01-29 31937.5
01-30 29790.0
01-31 28473.33
02-01 28647.5
02-02 26653.33
02-03 24607.69
02-04 24099.23
02-05 25198.46
02-06 24252.5
02-07 25510.0
02-08 26038.46
02-09 26304.62
02-10 22976.92
02-11 25502.73
02-12 23824.17
02-13 24606.15
02-14 24311.54
02-15 23642.31
02-16 25651.67
02-17 26701.67
02-18 27337.5
02-19 32971.67
02-20 30549.23
02-21 30930.0
02-22 30244.29
02-23 30556.43
02-24 31531.43
02-25 28903.85
02-26 31681.54
02-27 33682.14
02-28 35743.57
02-29 36750.0
03-01 37489.29
03-02 39735.0
03-03 39430.0
03-04 36022.86
03-05 35978.57
03-06 33328.57
03-07 34025.0
03-08 32408.57
03-09 32214.29
03-10 30900.0
03-11 31035.71
03-12 32585.71
03-13 34207.14
03-14 34742.86
03-15 35271.43
03-16 34614.29
03-17 33742.86
03-18 32535.71
03-19 32357.14
03-20 30700.0
03-21 31886.67
03-22 27057.14
03-23 26953.33
03-24 26306.67
03-25 25613.33
03-26 24686.67
03-27 24766.67
03-28 25653.33
03-29 27213.33
03-30 28220.0
03-31 29264.29
04-01 30500.0
04-02 35213.33
04-03 36100.0
04-04 37500.0
04-05 38500.0
04-06 39028.57
04-07 37878.0
04-08 37592.0
04-09 38670.0
04-10 37052.67
04-11 36261.33
04-12 37037.14
04-13 38634.29
04-14 35865.0
04-15 33293.85
04-16 32293.85
04-17 32014.62
04-18 31695.38
04-19 29657.69
04-20 30041.54
04-21 28465.71
04-22 29935.0
04-23 27662.14
04-24 25445.0
04-25 23216.92
04-26 22913.57
04-27 25570.71
04-28 25226.43
04-29 23146.43
04-30 22157.14
05-01 26506.67
05-02 27250.0
05-03 27385.71
05-04 28433.33
05-05 31780.0
05-06 31826.67
05-07 32580.0
05-08 29846.43
05-09 31342.67
05-10 31264.67
05-11 31220.0
05-12 29000.0
05-13 27060.0
05-14 28946.67
05-15 28542.86
05-16 28112.14
05-17 30530.71
05-18 27426.67
05-19 25613.33
05-20 22985.71
05-21 22122.0
05-22 21028.67
05-23 23977.33
05-24 23348.67
05-25 21691.33
05-26 20725.33
05-27 20005.33
05-28 18622.0
05-29 19710.67
05-30 21850.67
05-31 21249.33
06-01 19505.33
06-02 18870.0
06-03 18672.0
06-04 17343.33
06-05 16251.43
06-06 14403.57
06-07 14247.86
06-08 13358.0
06-09 13281.33
06-10 13198.67
06-11 13933.33
06-12 13564.29
06-13 13182.86
06-14 14055.71
06-15 16206.67
06-16 17537.33
06-17 16784.67
06-18 18456.67
06-19 22095.0
06-20 23477.14
06-21 21635.0
06-22 22457.86
06-23 19078.57
06-24 17604.29
06-25 17257.86
06-26 20923.08
06-27 18282.14
06-28 17760.0
06-29 20761.43
06-30 19158.57
07-01 17837.86
07-02 18591.43
07-03 17657.86
07-04 16295.0
07-05 13911.33
07-06 13047.33
07-07 12486.43
07-08 12596.43
07-09 12984.29
07-10 11271.33
07-11 12405.71
07-12 12224.0
07-13 10727.14
07-14 11474.0
07-15 11478.57
07-16 10622.86
07-17 10417.14
07-18 11012.14
07-19 12887.86
07-20 11634.29
07-21 12835.71
07-22 11787.14
07-23 11485.0
07-24 10750.0
07-25 9547.86
07-26 9587.14
07-27 9017.14
07-28 9622.14
07-29 10447.14
07-30 9140.71
07-31 8343.57
08-01 7850.83
08-02 7280.0
08-03 6675.71
08-04 6767.86
08-05 6493.57
08-06 6331.43
08-07 5790.71
08-08 6188.46
08-09 6146.15
08-10 5803.08
08-11 5715.71
08-12 6502.14
08-13 6586.43
08-14 7182.86
08-15 7937.14
08-16 7537.69
08-17 7089.23
08-18 6779.17
08-19 6637.69
08-20 7526.15
08-21 7137.69
08-22 6989.17
08-23 8090.71
08-24 7881.54
08-25 7717.69
08-26 8267.14
08-27 7191.43
08-28 6656.43
08-29 8331.43
08-30 7254.29
08-31 6917.86
09-01 6430.71
09-02 7233.57
09-03 7232.86
09-04 6909.29
09-05 6939.29
09-06 6762.86
09-07 6334.29
09-08 6341.43
09-09 6233.57
09-10 9694.29
09-11 12331.43
09-12 11214.29
09-13 11217.86
09-14 11115.0
09-15 10364.29
09-16 9732.14
09-17 8922.86
09-18 8152.14
09-19 9069.29
09-20 8193.57
09-21 7223.57
09-22 7118.46
09-23 7155.0
09-24 7203.57
09-25 7407.14
09-26 7457.14
09-27 7847.86
09-28 9119.29
09-29 9146.43
09-30 10343.08
10-01 8120.0
10-02 7885.38
10-03 7459.23
10-04 7719.23
10-05 9870.71
10-06 9381.43
10-07 8765.0
10-08 9217.86
10-09 9757.69
10-10 8607.86
10-11 8385.0
10-12 8001.43
10-13 7702.86
10-14 7596.43
10-15 7713.08
10-16 8176.43
10-17 8542.14
10-18 9465.0
10-19 9680.71
10-20 9912.14
10-21 9515.38
10-22 11813.57
10-23 13168.57
10-24 12340.0
10-25 11958.57
10-26 12505.38
10-27 12125.71
10-28 12898.57
10-29 17339.29
10-30 20427.14
10-31 24492.14
11-01 26903.57
11-02 26651.43
11-03 26260.0
11-04 24200.71
11-05 20998.46
11-06 21655.38
11-07 22949.23
11-08 20783.85
11-09 19533.08
11-10 18558.46
11-11 17928.46
11-12 18056.15
11-13 20040.0
11-14 18652.14
11-15 17532.86
11-16 18187.14
11-17 18345.71
11-18 17182.31
11-19 19086.15
11-20 22690.0
11-21 19815.71
11-22 19240.0
11-23 18940.71
11-24 17385.38
11-25 17570.0
11-26 19342.14
11-27 19262.86
11-28 20214.29
11-29 20425.0
11-30 20354.29
12-01 20368.57
12-02 20734.29
12-03 20752.86
12-04 21594.29
12-05 22400.0
12-06 21715.38
12-07 23470.71
12-08 24665.71
12-09 24362.14
12-10 23199.29
12-11 24784.29
12-12 24670.71
12-13 22837.14
12-14 21292.31
12-15 20183.08
12-16 19707.69
12-17 19125.38
12-18 20790.0
12-19 22447.69
12-20 23253.33
12-21 24558.33
12-22 28769.23
12-23 34976.92
12-24 34107.69
12-25 34969.23
12-26 34880.0
12-27 33233.33
12-28 33633.33
12-29 31763.64
12-30 36925.0
12-31 37916.67

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index