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

* WHAT...Heat index values up to 104 expected. * WHERE...Adams, Cumberland, Franklin, Fulton, Lancaster, and York Counties. * WHEN...From 11 AM to 8 PM EDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Smoke aloft from wildfires in Ontario and northern Minnesota may help to lower the temperatures a degree or two from current expectations for Wednesday. If it does, that would help to lessen concerns for heat illnesses.

Pequea Creek Near Ronks Historical Data

Historical Data


Streamflow Range


Date Average 2026 2025 2024 2023 2022 2021 2020 2019
01-01 88.67
01-02 188.96
01-03 101.14
01-04 112.68
01-05 96.04
01-06 81.0
01-07 94.75
01-08 85.88
01-09 79.7
01-10 420.7
01-11 114.17
01-12 104.55
01-13 134.92
01-14 108.2
01-15 104.18
01-16 104.72
01-17 100.28
01-18 97.0
01-19 101.58
01-20 123.67
01-21 115.68
01-22 103.92
01-23 109.25
01-24 108.7
01-25 109.36
01-26 168.94
01-27 129.14
01-28 117.02
01-29 131.62
01-30 107.92
01-31 105.72
02-01 97.95
02-02 95.95
02-03 93.38
02-04 126.25
02-05 106.22
02-06 99.26
02-07 99.5
02-08 99.5
02-09 95.3
02-10 81.78
02-11 80.94
02-12 86.47
02-13 86.63
02-14 92.3
02-15 83.55
02-16 92.45
02-17 125.04
02-18 91.22
02-19 88.22
02-20 92.84
02-21 90.22
02-22 88.72
02-23 94.48
02-24 88.8
02-25 85.07
02-26 89.49
02-27 85.0
02-28 92.64
02-29 113.9
03-01 129.11
03-02 95.7
03-03 103.54
03-04 104.91
03-05 88.7
03-06 125.61
03-07 101.24
03-08 90.36
03-09 86.17
03-10 173.23
03-11 95.67
03-12 105.33
03-13 108.14
03-14 100.96
03-15 99.04
03-16 105.8
03-17 104.91
03-18 100.56
03-19 102.54
03-20 98.75
03-21 87.82
03-22 178.84
03-23 105.52
03-24 121.24
03-25 134.05
03-26 108.15
03-27 97.56
03-28 97.67
03-29 124.58
03-30 94.97
03-31 91.59
04-01 98.63
04-02 108.44
04-03 126.2
04-04 133.29
04-05 111.07
04-06 107.22
04-07 102.4
04-08 154.34
04-09 102.31
04-10 103.8
04-11 98.36
04-12 106.57
04-13 101.36
04-14 102.3
04-15 111.74
04-16 91.94
04-17 87.31
04-18 84.56
04-19 126.19
04-20 90.94
04-21 86.99
04-22 84.1
04-23 83.86
04-24 83.04
04-25 83.7
04-26 84.9
04-27 97.59
04-28 83.63
04-29 91.06
04-30 85.49
05-01 202.5
05-02 90.61
05-03 85.89
05-04 96.03
05-05 90.04
05-06 94.89
05-07 102.76
05-08 138.3
05-09 99.53
05-10 93.67
05-11 88.74
05-12 88.07
05-13 90.69
05-14 81.18
05-15 99.02
05-16 95.98
05-17 93.02
05-18 85.5
05-19 87.23
05-20 91.2
05-21 84.91
05-22 85.37
05-23 96.76
05-24 91.07
05-25 95.54
05-26 86.03
05-27 86.3
05-28 93.84
05-29 138.4
05-30 116.41
05-31 94.86
06-01 90.71
06-02 84.76
06-03 82.83
06-04 135.96
06-05 76.18
06-06 88.1
06-07 71.37
06-08 68.65
06-09 134.14
06-10 146.91
06-11 81.14
06-12 82.29
06-13 88.91
06-14 72.9
06-15 73.21
06-16 71.41
06-17 85.67
06-18 72.69
06-19 72.63
06-20 75.24
06-21 74.14
06-22 69.61
06-23 72.89
06-24 77.83
06-25 74.64
06-26 71.13
06-27 72.21
06-28 102.71
06-29 71.64
06-30 66.96
07-01 79.06
07-02 212.64
07-03 92.93
07-04 81.66
07-05 84.6
07-06 83.53
07-07 81.5
07-08 76.3
07-09 88.47
07-10 117.33
07-11 84.87
07-12 143.22
07-13 62.93
07-14 64.06
07-15 74.53
07-16 72.7
07-17 69.55
07-18 80.78
07-19 66.02
07-20 67.05
07-21 67.17
07-22 61.58
07-23 112.02
07-24 62.22
07-25 57.7
07-26 58.52
07-27 57.32
07-28 55.35
07-29 55.28
07-30 54.45
07-31 50.17
08-01 56.15
08-02 60.97
08-03 53.8
08-04 50.65
08-05 116.68
08-06 53.62
08-07 52.63
08-08 180.82
08-09 57.68
08-10 52.37
08-11 64.4
08-12 56.07
08-13 51.94
08-14 58.48
08-15 50.03
08-16 45.54
08-17 47.98
08-18 59.34
08-19 104.98
08-20 44.84
08-21 47.02
08-22 49.85
08-23 52.68
08-24 72.23
08-25 46.97
08-26 43.95
08-27 42.38
08-28 41.8
08-29 44.03
08-30 45.95
08-31 40.48
09-01 39.07
09-02 37.54
09-03 61.43
09-04 50.48
09-05 48.17
09-06 59.55
09-07 52.03
09-08 47.07
09-09 49.5
09-10 70.28
09-11 47.88
09-12 45.67
09-13 55.6
09-14 42.6
09-15 39.55
09-16 38.68
09-17 38.3
09-18 38.82
09-19 37.5
09-20 35.57
09-21 34.78
09-22 34.87
09-23 35.25
09-24 65.95
09-25 68.98
09-26 44.92
09-27 40.47
09-28 41.6
09-29 40.87
09-30 126.98
10-01 48.34
10-02 43.48
10-03 56.4
10-04 48.03
10-05 59.13
10-06 45.8
10-07 44.07
10-08 44.07
10-09 42.02
10-10 40.32
10-11 40.53
10-12 44.12
10-13 46.18
10-14 61.42
10-15 50.22
10-16 42.83
10-17 77.62
10-18 43.07
10-19 40.87
10-20 45.38
10-21 47.98
10-22 44.2
10-23 48.63
10-24 50.0
10-25 45.5
10-26 67.47
10-27 48.3
10-28 56.67
10-29 45.68
10-30 148.68
10-31 70.9
11-01 258.75
11-02 62.03
11-03 51.54
11-04 52.25
11-05 50.78
11-06 48.56
11-07 48.46
11-08 47.44
11-09 47.22
11-10 47.62
11-11 47.54
11-12 84.34
11-13 62.38
11-14 51.6
11-15 49.42
11-16 75.2
11-17 56.05
11-18 51.67
11-19 51.38
11-20 51.53
11-21 49.2
11-22 85.52
11-23 54.63
11-24 53.73
11-25 53.78
11-26 54.8
11-27 57.13
11-28 52.38
11-29 47.88
11-30 46.68
12-01 101.32
12-02 63.57
12-03 66.92
12-04 65.88
12-05 64.02
12-06 55.42
12-07 63.25
12-08 53.35
12-09 50.47
12-10 58.4
12-11 101.23
12-12 66.62
12-13 55.8
12-14 59.88
12-15 70.8
12-16 116.74
12-17 102.48
12-18 327.04
12-19 100.57
12-20 92.23
12-21 75.48
12-22 75.62
12-23 120.53
12-24 85.42
12-25 240.1
12-26 96.98
12-27 94.47
12-28 177.6
12-29 90.85
12-30 76.16
12-31 86.57

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index