Overview Realtime Historical Map View
Flood Warning
2026-09-12T23:00:00-04:00

* WHAT...Flooding caused by excessive rainfall is occurring. * WHERE...Southeastern Armstrong County in west central Pennsylvania... Northern Indiana County in west central Pennsylvania... Southwestern Jefferson PA County in west central Pennsylvania... * WHEN...Until 1100 PM EDT. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - At 748 PM EDT, local law enforcement reported flooding in the warned area. Between 1.5 and 2.5 inches of rain have fallen. - Some locations that will experience flooding include... Indiana, Rural Valley, West Lebanon, Dayton, Chevy Chase Heights, Rossiter, Ernest, Marion Center, Elderton, Creekside, Plumville, Shelocta, Atwood, Dixonville, Jacksonville, Smicksburg and Rochester Mills. - http://www.weather.gov/safety/flood

Little Mahoning Creek At Mccormick, 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
01-01 283.67
01-02 254.17
01-03 251.64
01-04 347.33
01-05 283.89
01-06 227.39
01-07 188.57
01-08 151.24
01-09 136.71
01-10 377.56
01-11 250.48
01-12 215.1
01-13 313.26
01-14 274.77
01-15 241.08
01-16 194.07
01-17 218.74
01-18 238.41
01-19 202.7
01-20 321.39
01-21 267.23
01-22 183.78
01-23 198.33
01-24 340.55
01-25 569.12
01-26 545.5
01-27 484.0
01-28 410.37
01-29 382.27
01-30 293.01
01-31 326.26
02-01 285.33
02-02 233.17
02-03 192.83
02-04 202.29
02-05 290.13
02-06 157.17
02-07 176.25
02-08 204.89
02-09 257.18
02-10 215.78
02-11 379.03
02-12 345.04
02-13 364.79
02-14 318.2
02-15 310.88
02-16 497.59
02-17 598.39
02-18 548.56
02-19 337.0
02-20 372.64
02-21 308.91
02-22 267.01
02-23 391.2
02-24 308.4
02-25 258.61
02-26 317.02
02-27 340.47
02-28 323.0
02-29 406.75
03-01 370.73
03-02 475.67
03-03 304.08
03-04 310.67
03-05 248.71
03-06 237.06
03-07 201.46
03-08 249.75
03-09 253.55
03-10 326.23
03-11 281.43
03-12 381.43
03-13 391.0
03-14 250.65
03-15 344.19
03-16 237.59
03-17 231.01
03-18 227.25
03-19 200.7
03-20 210.16
03-21 262.12
03-22 146.92
03-23 158.35
03-24 256.86
03-25 188.84
03-26 173.06
03-27 167.91
03-28 181.94
03-29 465.64
03-30 236.81
03-31 211.51
04-01 249.96
04-02 239.03
04-03 390.13
04-04 464.89
04-05 313.43
04-06 291.36
04-07 254.58
04-08 245.05
04-09 225.86
04-10 183.77
04-11 235.45
04-12 256.34
04-13 241.8
04-14 215.36
04-15 274.15
04-16 212.44
04-17 241.72
04-18 194.5
04-19 183.43
04-20 263.44
04-21 201.63
04-22 178.8
04-23 164.29
04-24 143.78
04-25 130.36
04-26 124.28
04-27 176.06
04-28 119.66
04-29 108.73
04-30 157.43
05-01 170.67
05-02 202.66
05-03 165.82
05-04 210.6
05-05 227.4
05-06 209.0
05-07 386.73
05-08 253.7
05-09 239.34
05-10 348.2
05-11 208.04
05-12 170.05
05-13 171.19
05-14 240.63
05-15 204.82
05-16 326.67
05-17 268.27
05-18 171.05
05-19 154.12
05-20 126.3
05-21 116.91
05-22 105.5
05-23 140.17
05-24 121.41
05-25 113.39
05-26 108.77
05-27 90.26
05-28 93.63
05-29 205.93
05-30 262.59
05-31 159.69
06-01 212.19
06-02 163.52
06-03 108.09
06-04 84.77
06-05 69.81
06-06 73.63
06-07 69.84
06-08 62.95
06-09 86.57
06-10 71.11
06-11 75.61
06-12 68.31
06-13 90.69
06-14 123.36
06-15 142.87
06-16 207.49
06-17 132.07
06-18 123.05
06-19 285.06
06-20 253.43
06-21 246.46
06-22 154.06
06-23 127.85
06-24 121.85
06-25 93.55
06-26 118.77
06-27 86.29
06-28 253.35
06-29 257.93
06-30 125.57
07-01 145.64
07-02 114.09
07-03 172.66
07-04 92.91
07-05 80.69
07-06 123.69
07-07 233.25
07-08 123.53
07-09 131.11
07-10 148.44
07-11 135.73
07-12 124.26
07-13 79.7
07-14 62.36
07-15 102.94
07-16 61.43
07-17 51.26
07-18 80.55
07-19 204.26
07-20 84.54
07-21 63.47
07-22 65.43
07-23 68.37
07-24 51.28
07-25 42.6
07-26 48.9
07-27 53.04
07-28 61.04
07-29 237.56
07-30 85.47
07-31 55.25
08-01 50.44
08-02 44.2
08-03 154.26
08-04 93.94
08-05 57.31
08-06 49.34
08-07 44.36
08-08 44.79
08-09 43.6
08-10 93.32
08-11 81.8
08-12 56.36
08-13 177.93
08-14 89.76
08-15 72.86
08-16 58.77
08-17 81.68
08-18 72.94
08-19 61.72
08-20 53.91
08-21 216.46
08-22 159.58
08-23 87.41
08-24 66.86
08-25 48.83
08-26 56.0
08-27 39.82
08-28 34.5
08-29 73.41
08-30 94.91
08-31 41.87
09-01 45.18
09-02 80.31
09-03 59.05
09-04 62.95
09-05 54.47
09-06 56.7
09-07 52.18
09-08 65.26
09-09 74.19
09-10 295.09
09-11 537.21
09-12 138.16
09-13 110.23
09-14 77.06
09-15 66.11
09-16 54.48
09-17 43.04
09-18 99.18
09-19 66.6
09-20 47.31
09-21 44.87
09-22 58.61
09-23 51.2
09-24 49.52
09-25 46.45
09-26 67.94
09-27 61.61
09-28 77.25
09-29 58.97
09-30 167.49
10-01 51.48
10-02 50.56
10-03 107.02
10-04 79.3
10-05 78.6
10-06 57.66
10-07 52.24
10-08 61.01
10-09 72.59
10-10 49.54
10-11 40.87
10-12 79.68
10-13 56.56
10-14 51.86
10-15 82.94
10-16 58.47
10-17 52.03
10-18 75.82
10-19 54.58
10-20 49.26
10-21 50.28
10-22 138.49
10-23 39.23
10-24 70.88
10-25 49.49
10-26 49.58
10-27 42.94
10-28 66.95
10-29 175.11
10-30 311.95
10-31 224.19
11-01 247.79
11-02 161.21
11-03 126.37
11-04 100.07
11-05 67.82
11-06 189.74
11-07 113.55
11-08 108.77
11-09 80.69
11-10 118.78
11-11 143.38
11-12 166.23
11-13 111.56
11-14 86.64
11-15 71.91
11-16 101.69
11-17 89.42
11-18 90.38
11-19 109.02
11-20 180.43
11-21 149.98
11-22 215.34
11-23 150.63
11-24 152.37
11-25 140.09
11-26 126.42
11-27 145.55
11-28 138.72
11-29 108.32
11-30 93.29
12-01 97.29
12-02 129.51
12-03 167.16
12-04 187.93
12-05 134.29
12-06 146.69
12-07 252.76
12-08 189.59
12-09 166.92
12-10 212.41
12-11 224.4
12-12 209.64
12-13 150.51
12-14 126.11
12-15 152.51
12-16 151.01
12-17 177.29
12-18 268.04
12-19 264.57
12-20 180.07
12-21 189.64
12-22 448.09
12-23 329.18
12-24 302.72
12-25 363.43
12-26 261.3
12-27 208.62
12-28 377.45
12-29 341.34
12-30 371.73
12-31 259.0

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index