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

* WHAT...Heat index values up to 104. * WHERE...A portion of central Pennsylvania. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Swatara Creek Near Hershey, 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 1172.67
01-02 1194.91
01-03 1079.91
01-04 1139.5
01-05 1013.1
01-06 937.3
01-07 850.33
01-08 779.56
01-09 730.1
01-10 1399.82
01-11 1874.36
01-12 1369.18
01-13 1284.09
01-14 1271.09
01-15 1041.91
01-16 902.82
01-17 945.67
01-18 772.08
01-19 746.15
01-20 733.77
01-21 979.36
01-22 694.27
01-23 671.78
01-24 1493.3
01-25 1566.2
01-26 1760.89
01-27 1410.78
01-28 1258.91
01-29 1291.0
01-30 987.55
01-31 930.18
02-01 1492.18
02-02 906.6
02-03 810.8
02-04 1490.9
02-05 1764.8
02-06 1011.3
02-07 898.91
02-08 1146.91
02-09 998.64
02-10 848.27
02-11 787.45
02-12 1128.73
02-13 992.73
02-14 973.55
02-15 847.45
02-16 887.7
02-17 1858.8
02-18 1201.55
02-19 1005.91
02-20 984.55
02-21 1052.0
02-22 1014.33
02-23 1123.08
02-24 1131.67
02-25 1495.0
02-26 1528.08
02-27 1151.62
02-28 1094.31
02-29 1392.0
03-01 1329.0
03-02 1359.54
03-03 1298.62
03-04 1182.08
03-05 1178.69
03-06 1383.08
03-07 1255.54
03-08 1072.77
03-09 926.69
03-10 1154.36
03-11 1324.5
03-12 1583.21
03-13 1653.14
03-14 1277.31
03-15 1329.15
03-16 1103.15
03-17 1099.31
03-18 1050.21
03-19 974.0
03-20 1010.57
03-21 906.33
03-22 1323.71
03-23 1190.13
03-24 1196.2
03-25 1014.4
03-26 921.2
03-27 878.14
03-28 843.0
03-29 1217.86
03-30 976.0
03-31 1258.29
04-01 1317.73
04-02 1156.87
04-03 1206.67
04-04 1434.67
04-05 1290.53
04-06 1022.2
04-07 1317.13
04-08 1641.4
04-09 1171.2
04-10 991.4
04-11 842.53
04-12 912.93
04-13 1352.71
04-14 1460.5
04-15 1035.58
04-16 1545.83
04-17 1347.15
04-18 969.33
04-19 855.58
04-20 914.75
04-21 889.14
04-22 887.79
04-23 766.5
04-24 721.21
04-25 658.43
04-26 905.86
04-27 770.57
04-28 687.46
04-29 636.38
04-30 651.29
05-01 1839.33
05-02 1505.64
05-03 1015.86
05-04 931.0
05-05 952.07
05-06 1132.93
05-07 1139.0
05-08 1339.13
05-09 1080.2
05-10 1227.47
05-11 951.33
05-12 854.27
05-13 1009.07
05-14 1178.8
05-15 959.86
05-16 1251.71
05-17 1376.79
05-18 1117.0
05-19 975.47
05-20 1447.71
05-21 1261.53
05-22 971.33
05-23 987.67
05-24 898.53
05-25 812.73
05-26 697.07
05-27 671.07
05-28 661.93
05-29 680.2
05-30 983.13
05-31 995.87
06-01 1162.2
06-02 880.8
06-03 903.07
06-04 722.93
06-05 868.6
06-06 834.64
06-07 660.07
06-08 559.27
06-09 644.53
06-10 589.8
06-11 795.0
06-12 1312.43
06-13 902.86
06-14 883.64
06-15 683.27
06-16 580.6
06-17 544.2
06-18 542.73
06-19 543.93
06-20 684.79
06-21 933.31
06-22 927.14
06-23 646.0
06-24 648.43
06-25 712.36
06-26 515.31
06-27 483.92
06-28 693.77
06-29 1211.86
06-30 613.64
07-01 724.36
07-02 1197.71
07-03 806.9
07-04 627.31
07-05 592.69
07-06 566.0
07-07 486.14
07-08 760.86
07-09 914.14
07-10 676.33
07-11 522.93
07-12 495.93
07-13 427.2
07-14 429.67
07-15 749.07
07-16 733.15
07-17 497.21
07-18 752.5
07-19 523.21
07-20 418.0
07-21 371.07
07-22 393.5
07-23 666.0
07-24 1861.36
07-25 2369.36
07-26 2991.79
07-27 1387.79
07-28 807.5
07-29 631.21
07-30 579.21
07-31 497.43
08-01 461.85
08-02 562.92
08-03 734.38
08-04 822.93
08-05 1089.29
08-06 666.57
08-07 555.62
08-08 842.08
08-09 641.58
08-10 501.54
08-11 416.86
08-12 814.21
08-13 1063.71
08-14 1339.77
08-15 928.92
08-16 678.52
08-17 617.85
08-18 520.25
08-19 758.46
08-20 658.02
08-21 473.05
08-22 535.27
08-23 594.43
08-24 569.08
08-25 440.15
08-26 380.57
08-27 354.43
08-28 333.79
08-29 876.31
08-30 463.55
08-31 371.21
09-01 774.5
09-02 1503.43
09-03 2097.85
09-04 601.21
09-05 558.34
09-06 897.7
09-07 1140.41
09-08 487.62
09-09 393.23
09-10 2957.29
09-11 1140.86
09-12 814.64
09-13 639.43
09-14 547.5
09-15 467.57
09-16 394.62
09-17 376.07
09-18 352.77
09-19 603.58
09-20 490.64
09-21 357.54
09-22 334.15
09-23 343.29
09-24 945.93
09-25 612.43
09-26 668.43
09-27 509.93
09-28 487.79
09-29 1035.36
09-30 711.0
10-01 601.46
10-02 434.08
10-03 443.54
10-04 430.23
10-05 516.0
10-06 480.64
10-07 398.57
10-08 402.54
10-09 433.62
10-10 524.0
10-11 395.29
10-12 1092.71
10-13 635.64
10-14 502.93
10-15 564.69
10-16 494.36
10-17 597.92
10-18 441.79
10-19 387.86
10-20 475.57
10-21 429.79
10-22 376.43
10-23 362.79
10-24 355.64
10-25 381.71
10-26 337.0
10-27 329.71
10-28 605.29
10-29 560.0
10-30 1067.14
10-31 1480.79
11-01 1549.29
11-02 1476.43
11-03 1023.07
11-04 820.43
11-05 522.46
11-06 785.46
11-07 881.85
11-08 659.23
11-09 551.38
11-10 632.46
11-11 548.38
11-12 565.54
11-13 820.92
11-14 754.93
11-15 570.07
11-16 535.64
11-17 654.29
11-18 665.46
11-19 618.77
11-20 590.69
11-21 537.36
11-22 558.92
11-23 789.71
11-24 1109.31
11-25 1077.62
11-26 832.64
11-27 876.64
11-28 941.36
11-29 707.57
11-30 681.36
12-01 802.93
12-02 803.86
12-03 806.36
12-04 726.07
12-05 655.64
12-06 634.69
12-07 731.71
12-08 951.43
12-09 834.14
12-10 743.93
12-11 726.36
12-12 798.0
12-13 657.79
12-14 616.85
12-15 669.31
12-16 757.38
12-17 978.92
12-18 960.23
12-19 1431.77
12-20 1073.38
12-21 796.73
12-22 1234.55
12-23 998.5
12-24 1049.25
12-25 1629.5
12-26 1942.31
12-27 1173.0
12-28 1146.0
12-29 1465.64
12-30 1341.33
12-31 1180.42

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index