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Air Quality Alert
None

The Pennsylvania Department of Environmental Protection has issued a code ORANGE air quality alert for Tuesday, for the greater Pittsburgh region, including Allegheny, Butler, Beaver, Armstrong, Washington, Westmoreland and Fayette counties. A code ORANGE air quality alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children, the elderly, and people suffering from asthma, heart disease, or other lung diseases. The effects of air pollution can be minimized by avoiding outdoor exercise or strenuous activity. For more information on ground-level ozone and fine particles, visit http://www.airnow.gov and https://www.ahs.dep.pa.gov/AQPartnersWeb/

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 11550.71
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