Overview Realtime Historical Map View
Freeze Warning
2026-10-24T09:00:00-04:00

* WHAT...Sub-freezing temperatures as low as 30 possible. * WHERE...Lancaster and Lebanon Counties. * WHEN...From midnight tonight to 9 AM EDT Saturday. * IMPACTS...Freezing conditions could kill crops and other sensitive vegetation.

Susquehanna River At Marietta, 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 59200.0
01-02 62681.82
01-03 63327.27
01-04 62227.27
01-05 62820.0
01-06 60370.0
01-07 56810.0
01-08 53966.67
01-09 48877.78
01-10 47100.0
01-11 59300.0
01-12 63266.67
01-13 57700.0
01-14 59930.0
01-15 61160.0
01-16 62870.0
01-17 62454.55
01-18 55220.0
01-19 62233.33
01-20 59491.67
01-21 60500.0
01-22 67490.91
01-23 67900.0
01-24 59311.11
01-25 54311.11
01-26 62388.89
01-27 61444.44
01-28 72340.0
01-29 75810.0
01-30 68472.73
01-31 61100.0
02-01 56025.0
02-02 66766.67
02-03 60216.67
02-04 55141.67
02-05 51927.27
02-06 44120.0
02-07 42927.27
02-08 40636.36
02-09 49433.33
02-10 52058.33
02-11 47358.33
02-12 42441.67
02-13 40650.0
02-14 41100.0
02-15 38475.0
02-16 38790.91
02-17 39990.91
02-18 50936.36
02-19 46681.82
02-20 58900.0
02-21 56154.55
02-22 49981.82
02-23 47163.64
02-24 47600.0
02-25 44209.09
02-26 51181.82
02-27 67425.0
02-28 64083.33
02-29 62700.0
03-01 62538.46
03-02 63353.85
03-03 61057.14
03-04 63214.29
03-05 61392.86
03-06 58364.29
03-07 58100.0
03-08 60671.43
03-09 60492.86
03-10 63750.0
03-11 69023.08
03-12 68446.15
03-13 67884.62
03-14 69257.14
03-15 77185.71
03-16 71278.57
03-17 65671.43
03-18 66164.29
03-19 63253.33
03-20 64514.29
03-21 61813.33
03-22 60664.29
03-23 60486.67
03-24 58740.0
03-25 56420.0
03-26 54746.67
03-27 52480.0
03-28 52153.33
03-29 52940.0
03-30 55506.67
03-31 59742.86
04-01 60500.0
04-02 64713.33
04-03 67126.67
04-04 77046.67
04-05 81820.0
04-06 81626.67
04-07 78060.0
04-08 76346.67
04-09 74860.0
04-10 73806.67
04-11 70853.33
04-12 66221.43
04-13 64914.29
04-14 63264.29
04-15 61384.62
04-16 59538.46
04-17 62846.15
04-18 63700.0
04-19 61169.23
04-20 59030.77
04-21 56728.57
04-22 60078.57
04-23 62264.29
04-24 60528.57
04-25 54178.57
04-26 49764.29
04-27 47035.71
04-28 45764.29
04-29 45764.29
04-30 45735.71
05-01 67813.33
05-02 76100.0
05-03 77114.29
05-04 68786.67
05-05 64640.0
05-06 65206.67
05-07 70940.0
05-08 78021.43
05-09 76933.33
05-10 71993.33
05-11 64960.0
05-12 61920.0
05-13 59253.33
05-14 58460.0
05-15 56064.29
05-16 55878.57
05-17 60642.86
05-18 66886.67
05-19 64400.0
05-20 59600.0
05-21 57520.0
05-22 52200.0
05-23 49020.0
05-24 50433.33
05-25 51973.33
05-26 46566.67
05-27 41826.67
05-28 40486.67
05-29 40992.86
05-30 40873.33
05-31 41040.0
06-01 43040.0
06-02 43333.33
06-03 41571.33
06-04 38022.0
06-05 34256.0
06-06 32784.29
06-07 29658.57
06-08 27432.0
06-09 26620.67
06-10 28148.67
06-11 29570.67
06-12 32191.54
06-13 32103.08
06-14 31178.57
06-15 29631.33
06-16 29506.67
06-17 28106.67
06-18 27673.33
06-19 28414.29
06-20 32100.0
06-21 32735.71
06-22 32521.43
06-23 33264.29
06-24 31300.0
06-25 27377.14
06-26 26378.57
06-27 24692.86
06-28 25285.71
06-29 25850.0
06-30 28614.29
07-01 28228.57
07-02 29487.14
07-03 29137.86
07-04 29157.14
07-05 26726.0
07-06 27555.33
07-07 27147.14
07-08 25369.29
07-09 25176.43
07-10 23119.33
07-11 22444.67
07-12 21289.33
07-13 19787.33
07-14 19571.33
07-15 23821.33
07-16 23473.33
07-17 21889.33
07-18 22581.33
07-19 21690.67
07-20 20698.0
07-21 21810.0
07-22 19659.33
07-23 20354.67
07-24 22664.67
07-25 31103.33
07-26 39930.0
07-27 40238.0
07-28 30648.0
07-29 24637.33
07-30 21150.67
07-31 19184.0
08-01 17788.57
08-02 17440.67
08-03 18570.0
08-04 18460.0
08-05 23100.67
08-06 21055.33
08-07 18456.0
08-08 18607.14
08-09 17959.29
08-10 17190.71
08-11 15787.33
08-12 15308.67
08-13 18278.0
08-14 20116.0
08-15 24837.33
08-16 29320.71
08-17 29191.43
08-18 24103.08
08-19 20332.86
08-20 23360.71
08-21 23298.57
08-22 24357.69
08-23 21213.33
08-24 19631.43
08-25 19770.0
08-26 17994.0
08-27 16496.67
08-28 15643.33
08-29 15794.0
08-30 15139.33
08-31 16031.33
09-01 17152.67
09-02 21911.33
09-03 28592.67
09-04 22098.0
09-05 20282.0
09-06 19474.0
09-07 21751.33
09-08 38320.0
09-09 59927.33
09-10 51271.33
09-11 46444.67
09-12 45348.67
09-13 41687.33
09-14 33089.33
09-15 27926.0
09-16 25053.33
09-17 22654.0
09-18 21027.33
09-19 20932.67
09-20 24641.33
09-21 24776.67
09-22 21482.14
09-23 18627.33
09-24 23043.33
09-25 28240.0
09-26 27223.33
09-27 26282.0
09-28 27011.33
09-29 33258.0
09-30 39475.0
10-01 28061.43
10-02 23698.57
10-03 22370.0
10-04 21385.71
10-05 26716.67
10-06 25696.67
10-07 24244.0
10-08 22069.33
10-09 20942.14
10-10 19166.67
10-11 19023.33
10-12 25440.0
10-13 23894.67
10-14 21699.33
10-15 21665.0
10-16 21917.33
10-17 21826.67
10-18 20905.33
10-19 19696.67
10-20 19368.67
10-21 20294.67
10-22 19943.33
10-23 20934.0
10-24 22282.86
10-25 21176.43
10-26 20488.57
10-27 18842.14
10-28 18958.57
10-29 25965.71
10-30 32442.86
10-31 42456.43
11-01 51063.57
11-02 51835.0
11-03 49657.86
11-04 45322.14
11-05 34216.92
11-06 32474.62
11-07 32206.15
11-08 29371.54
11-09 27670.0
11-10 27186.92
11-11 27238.46
11-12 26073.85
11-13 25694.62
11-14 34497.86
11-15 36530.71
11-16 33124.29
11-17 30617.14
11-18 29020.0
11-19 28411.54
11-20 27666.15
11-21 27852.86
11-22 27596.15
11-23 28842.14
11-24 34015.38
11-25 36720.77
11-26 35640.71
11-27 33752.14
11-28 33955.71
11-29 36647.86
11-30 35657.14
12-01 35064.29
12-02 34221.43
12-03 33900.0
12-04 33235.71
12-05 33700.0
12-06 34269.23
12-07 35100.0
12-08 35800.0
12-09 40335.71
12-10 40057.14
12-11 36772.86
12-12 35500.0
12-13 38214.29
12-14 38440.0
12-15 36461.54
12-16 33783.08
12-17 37773.08
12-18 39832.31
12-19 42409.23
12-20 48338.46
12-21 49083.33
12-22 49676.92
12-23 55469.23
12-24 65238.46
12-25 68223.08
12-26 78861.54
12-27 84241.67
12-28 69184.62
12-29 66309.09
12-30 61900.0
12-31 60458.33

Annual Peak Streamflow


Seasonal Comparison


Oceanic Nino Index