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Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Illinois River at La Salle Observed crest: 15.48 ft at 12:30am Feb 07 Observed: 18.64 ft at 5:30am Jan 31 Observed: 18.61 ft at 6:00am Jan 31 Observed: 18.64 ft at 6:30am Jan 31 Observed: 18.58 ft at 7:00am Jan 31 Observed: 18.59 ft at 7:30am Jan 31 Observed: 18.58 ft at 8:00am Jan 31 Observed: 18.6 ft at 8:30am Jan 31 Observed: 18.6 ft at 9:00am Jan 31 Observed: 18.6 ft at 9:30am Jan 31 Observed: 18.59 ft at 10:00am Jan 31 Observed: 18.59 ft at 10:30am Jan 31 Observed: 18.57 ft at 11:00am Jan 31 Observed: 18.59 ft at 11:30am Jan 31 Observed: 18.59 ft at 12:00pm Jan 31 Observed: 18.58 ft at 12:30pm Jan 31 Observed: 18.59 ft at 1:00pm Jan 31 Observed: 18.59 ft at 1:30pm Jan 31 Observed: 18.59 ft at 2:00pm Jan 31 Observed: 18.57 ft at 2:30pm Jan 31 Observed: 18.55 ft at 3:00pm Jan 31 Observed: 18.55 ft at 3:30pm Jan 31 Observed: 18.54 ft at 4:00pm Jan 31 Observed: 18.54 ft at 4:30pm Jan 31 Observed: 18.55 ft at 5:00pm Jan 31 Observed: 18.52 ft at 5:30pm Jan 31 Observed: 18.48 ft at 6:00pm Jan 31 Observed: 18.45 ft at 6:30pm Jan 31 Observed: 18.45 ft at 7:00pm Jan 31 Observed: 18.43 ft at 7:30pm Jan 31 Observed: 18.4 ft at 8:00pm Jan 31 Observed: 18.39 ft at 8:30pm Jan 31 Observed: 18.38 ft at 9:00pm Jan 31 Observed: 18.31 ft at 9:30pm Jan 31 Observed: 18.29 ft at 10:00pm Jan 31 Observed: 18.24 ft at 10:30pm Jan 31 Observed: 18.28 ft at 11:00pm Jan 31 Observed: 18.23 ft at 11:30pm Jan 31 Observed: 18.2 ft at 12:00am Feb 1 Observed: 18.18 ft at 12:30am Feb 1 Observed: 18.17 ft at 1:00am Feb 1 Observed: 18.15 ft at 1:30am Feb 1 Observed: 18.16 ft at 2:00am Feb 1 Observed: 18.13 ft at 2:30am Feb 1 Observed: 18.12 ft at 3:00am Feb 1 Observed: 18.1 ft at 3:30am Feb 1 Observed: 18.08 ft at 4:00am Feb 1 Observed: 18.09 ft at 4:30am Feb 1 Observed: 18.06 ft at 5:00am Feb 1 Observed: 18.05 ft at 5:30am Feb 1 Observed: 18.04 ft at 6:00am Feb 1 Observed: 18.03 ft at 6:30am Feb 1 Observed: 18.01 ft at 7:00am Feb 1 Observed: 18.08 ft at 7:30am Feb 1 Observed: 18.09 ft at 8:00am Feb 1 Observed: 17.95 ft at 8:30am Feb 1 Observed: 18.12 ft at 9:00am Feb 1 Observed: 18.07 ft at 9:30am Feb 1 Observed: 18.06 ft at 10:00am Feb 1 Observed: 18.12 ft at 10:30am Feb 1 Observed: 18.13 ft at 11:00am Feb 1 Observed: 18.13 ft at 11:30am Feb 1 Observed: 18.12 ft at 12:00pm Feb 1 Observed: 18.15 ft at 12:30pm Feb 1 Observed: 18.08 ft at 1:00pm Feb 1 Observed: 18.07 ft at 1:30pm Feb 1 Observed: 18.04 ft at 2:00pm Feb 1 Observed: 18.03 ft at 2:30pm Feb 1 Observed: 18.01 ft at 3:00pm Feb 1 Observed: 18 ft at 3:30pm Feb 1 Observed: 18 ft at 4:00pm Feb 1 Observed: 17.89 ft at 4:30pm Feb 1 Observed: 17.87 ft at 5:00pm Feb 1 Observed: 17.85 ft at 5:30pm Feb 1 Observed: 17.72 ft at 6:00pm Feb 1 Observed: 17.7 ft at 6:30pm Feb 1 Observed: 17.65 ft at 7:00pm Feb 1 Observed: 17.62 ft at 7:30pm Feb 1 Observed: 17.59 ft at 8:00pm Feb 1 Observed: 17.55 ft at 8:30pm Feb 1 Observed: 17.53 ft at 9:00pm Feb 1 Observed: 17.51 ft at 9:30pm Feb 1 Observed: 17.49 ft at 10:00pm Feb 1 Observed: 17.47 ft at 10:30pm Feb 1 Observed: 17.46 ft at 11:00pm Feb 1 Observed: 17.44 ft at 11:30pm Feb 1 Observed: 17.62 ft at 12:00am Feb 2 Observed: 17.64 ft at 12:30am Feb 2 Observed: 17.67 ft at 1:00am Feb 2 Observed: 17.69 ft at 1:30am Feb 2 Observed: 17.7 ft at 2:00am Feb 2 Observed: 17.7 ft at 2:30am Feb 2 Observed: 17.7 ft at 3:00am Feb 2 Observed: 17.72 ft at 3:30am Feb 2 Observed: 17.72 ft at 4:00am Feb 2 Observed: 17.73 ft at 4:30am Feb 2 Observed: 17.72 ft at 5:00am Feb 2 Observed: 17.88 ft at 5:30am Feb 2 Observed: 17.9 ft at 6:00am Feb 2 Observed: 17.94 ft at 6:30am Feb 2 Observed: 17.97 ft at 7:00am Feb 2 Observed: 17.98 ft at 7:30am Feb 2 Observed: 18.01 ft at 8:00am Feb 2 Observed: 18.03 ft at 8:30am Feb 2 Observed: 18.03 ft at 9:00am Feb 2 Observed: 18.06 ft at 9:30am Feb 2 Observed: 17.93 ft at 10:00am Feb 2 Observed: 17.88 ft at 10:30am Feb 2 Observed: 17.85 ft at 11:00am Feb 2 Observed: 17.81 ft at 11:30am Feb 2 Observed: 17.82 ft at 12:00pm Feb 2 Observed: 17.81 ft at 12:30pm Feb 2 Observed: 17.81 ft at 1:00pm Feb 2 Observed: 17.79 ft at 1:30pm Feb 2 Observed: 17.79 ft at 2:00pm Feb 2 Observed: 17.76 ft at 2:30pm Feb 2 Observed: 17.62 ft at 3:00pm Feb 2 Observed: 17.52 ft at 3:30pm Feb 2 Observed: 17.52 ft at 4:00pm Feb 2 Observed: 17.48 ft at 4:30pm Feb 2 Observed: 17.46 ft at 5:00pm Feb 2 Observed: 17.54 ft at 5:30pm Feb 2 Observed: 17.51 ft at 6:00pm Feb 2 Observed: 17.51 ft at 6:30pm Feb 2 Observed: 17.5 ft at 7:00pm Feb 2 Observed: 17.49 ft at 7:30pm Feb 2 Observed: 17.47 ft at 8:00pm Feb 2 Observed: 17.47 ft at 8:30pm Feb 2 Observed: 17.47 ft at 9:00pm Feb 2 Observed: 17.43 ft at 9:30pm Feb 2 Observed: 17.43 ft at 10:00pm Feb 2 Observed: 17.43 ft at 10:30pm Feb 2 Observed: 17.4 ft at 11:00pm Feb 2 Observed: 17.3 ft at 11:30pm Feb 2 Observed: 17.29 ft at 12:00am Feb 3 Observed: 17.25 ft at 12:30am Feb 3 Observed: 17.24 ft at 1:00am Feb 3 Observed: 17.2 ft at 1:30am Feb 3 Observed: 17.18 ft at 2:00am Feb 3 Observed: 17.17 ft at 2:30am Feb 3 Observed: 17.15 ft at 3:00am Feb 3 Observed: 17.19 ft at 3:30am Feb 3 Observed: 17.22 ft at 4:00am Feb 3 Observed: 17.2 ft at 4:30am Feb 3 Observed: 17.21 ft at 5:00am Feb 3 Observed: 17.2 ft at 5:30am Feb 3 Observed: 17.22 ft at 6:00am Feb 3 Observed: 17.21 ft at 6:30am Feb 3 Observed: 17.2 ft at 7:00am Feb 3 Observed: 17.14 ft at 7:30am Feb 3 Observed: 17.13 ft at 8:00am Feb 3 Observed: 17.12 ft at 8:30am Feb 3 Observed: 17.14 ft at 9:00am Feb 3 Observed: 17.09 ft at 9:30am Feb 3 Observed: 17.13 ft at 10:00am Feb 3 Observed: 17.06 ft at 10:30am Feb 3 Observed: 17.05 ft at 11:00am Feb 3 Observed: 17.02 ft at 11:30am Feb 3 Observed: 16.98 ft at 12:00pm Feb 3 Observed: 17.01 ft at 12:30pm Feb 3 Observed: 16.98 ft at 1:00pm Feb 3 Observed: 16.98 ft at 1:30pm Feb 3 Observed: 16.95 ft at 2:00pm Feb 3 Observed: 16.92 ft at 2:30pm Feb 3 Observed: 16.86 ft at 3:00pm Feb 3 Observed: 16.85 ft at 3:30pm Feb 3 Observed: 16.82 ft at 4:00pm Feb 3 Observed: 16.81 ft at 4:30pm Feb 3 Observed: 16.8 ft at 5:00pm Feb 3 Observed: 16.78 ft at 5:30pm Feb 3 Observed: 16.76 ft at 6:00pm Feb 3 Observed: 16.74 ft at 6:30pm Feb 3 Observed: 16.72 ft at 7:00pm Feb 3 Observed: 16.72 ft at 7:30pm Feb 3 Observed: 16.7 ft at 8:00pm Feb 3 Observed: 16.69 ft at 8:30pm Feb 3 Observed: 16.69 ft at 9:00pm Feb 3 Observed: 16.68 ft at 9:30pm Feb 3 Observed: 16.64 ft at 10:00pm Feb 3 Observed: 16.63 ft at 10:30pm Feb 3 Observed: 16.61 ft at 11:00pm Feb 3 Observed: 16.61 ft at 11:30pm Feb 3 Observed: 16.67 ft at 12:00am Feb 4 Observed: 16.59 ft at 12:30am Feb 4 Observed: 16.56 ft at 1:00am Feb 4 Observed: 16.58 ft at 1:30am Feb 4 Observed: 16.56 ft at 2:00am Feb 4 Observed: 16.55 ft at 2:30am Feb 4 Observed: 16.67 ft at 3:00am Feb 4 Observed: 16.71 ft at 3:30am Feb 4 Observed: 16.73 ft at 4:00am Feb 4 Observed: 16.76 ft at 4:30am Feb 4 Observed: 16.78 ft at 5:00am Feb 4 Observed: 16.79 ft at 5:30am Feb 4 Observed: 16.82 ft at 6:00am Feb 4 Observed: 16.84 ft at 6:30am Feb 4 Observed: 16.84 ft at 7:00am Feb 4 Observed: 16.82 ft at 7:30am Feb 4 Observed: 16.69 ft at 8:00am Feb 4 Observed: 16.66 ft at 8:30am Feb 4 Observed: 16.63 ft at 9:00am Feb 4 Observed: 16.59 ft at 9:30am Feb 4 Observed: 16.57 ft at 10:00am Feb 4 Observed: 16.66 ft at 10:30am Feb 4 Observed: 16.62 ft at 11:00am Feb 4 Observed: 16.64 ft at 11:30am Feb 4 Observed: 16.57 ft at 12:00pm Feb 4 Observed: 16.55 ft at 12:30pm Feb 4 Observed: 16.56 ft at 1:00pm Feb 4 Observed: 16.27 ft at 1:30pm Feb 4 Observed: 16.19 ft at 2:00pm Feb 4 Observed: 16.33 ft at 2:30pm Feb 4 Observed: 16.29 ft at 3:00pm Feb 4 Observed: 16.24 ft at 3:30pm Feb 4 Observed: 16.21 ft at 4:00pm Feb 4 Observed: 16.18 ft at 4:30pm Feb 4 Observed: 16.15 ft at 5:00pm Feb 4 Observed: 16.13 ft at 5:30pm Feb 4 Observed: 16.25 ft at 6:00pm Feb 4 Observed: 16.27 ft at 6:30pm Feb 4 Observed: 16.3 ft at 7:00pm Feb 4 Observed: 16.28 ft at 7:30pm Feb 4 Observed: 16.5 ft at 8:00pm Feb 4 Observed: 16.56 ft at 8:30pm Feb 4 Observed: 16.6 ft at 9:00pm Feb 4 Observed: 16.37 ft at 9:30pm Feb 4 Observed: 16.41 ft at 10:00pm Feb 4 Observed: 16.39 ft at 10:30pm Feb 4 Observed: 16.65 ft at 11:00pm Feb 4 Observed: 16.64 ft at 11:30pm Feb 4 Observed: 16.67 ft at 12:00am Feb 5 Observed: 16.68 ft at 12:30am Feb 5 Observed: 16.66 ft at 1:00am Feb 5 Observed: 16.6 ft at 1:30am Feb 5 Observed: 16.6 ft at 2:00am Feb 5 Observed: 16.56 ft at 2:30am Feb 5 Observed: 16.57 ft at 3:00am Feb 5 Observed: 16.5 ft at 3:30am Feb 5 Observed: 16.48 ft at 4:00am Feb 5 Observed: 16.45 ft at 4:30am Feb 5 Observed: 16.42 ft at 5:00am Feb 5 Observed: 16.42 ft at 5:30am Feb 5 Observed: 16.4 ft at 6:00am Feb 5 Observed: 16.4 ft at 6:30am Feb 5 Observed: 16.36 ft at 7:00am Feb 5 Observed: 16.31 ft at 7:30am Feb 5 Observed: 16.26 ft at 8:00am Feb 5 Observed: 16.25 ft at 8:30am Feb 5 Observed: 16.22 ft at 9:00am Feb 5 Observed: 16.21 ft at 9:30am Feb 5 Observed: 16.19 ft at 10:00am Feb 5 Observed: 16.16 ft at 10:30am Feb 5 Observed: 16.14 ft at 11:00am Feb 5 Observed: 16.11 ft at 11:30am Feb 5 Observed: 16.2 ft at 12:00pm Feb 5 Observed: 16.22 ft at 12:30pm Feb 5 Observed: 16.24 ft at 1:00pm Feb 5 Observed: 16.26 ft at 1:30pm Feb 5 Observed: 16.28 ft at 2:00pm Feb 5 Observed: 16.19 ft at 2:30pm Feb 5 Observed: 16.2 ft at 3:00pm Feb 5 Observed: 16.16 ft at 3:30pm Feb 5 Observed: 16.17 ft at 4:00pm Feb 5 Observed: 16.12 ft at 4:30pm Feb 5 Observed: 16.12 ft at 5:00pm Feb 5 Observed: 16.08 ft at 5:30pm Feb 5 Observed: 16.09 ft at 6:00pm Feb 5 Observed: 16.06 ft at 6:30pm Feb 5 Observed: 16.05 ft at 7:00pm Feb 5 Observed: 16.03 ft at 7:30pm Feb 5 Observed: 16 ft at 8:00pm Feb 5 Observed: 16 ft at 8:30pm Feb 5 Observed: 15.97 ft at 9:00pm Feb 5 Observed: 15.98 ft at 9:30pm Feb 5 Observed: 15.95 ft at 10:00pm Feb 5 Observed: 15.95 ft at 10:30pm Feb 5 Observed: 15.99 ft at 11:00pm Feb 5 Observed: 15.92 ft at 11:30pm Feb 5 Observed: 15.95 ft at 12:00am Feb 6 Observed: 15.91 ft at 12:30am Feb 6 Observed: 15.89 ft at 1:00am Feb 6 Observed: 15.84 ft at 1:30am Feb 6 Observed: 15.88 ft at 2:00am Feb 6 Observed: 15.82 ft at 2:30am Feb 6 Observed: 15.82 ft at 3:00am Feb 6 Observed: 15.87 ft at 3:30am Feb 6 Observed: 15.8 ft at 4:00am Feb 6 Observed: 15.77 ft at 4:30am Feb 6 Observed: 15.78 ft at 5:00am Feb 6 Observed: 15.81 ft at 5:30am Feb 6 Observed: 15.74 ft at 6:00am Feb 6 Observed: 15.83 ft at 6:30am Feb 6 Observed: 15.73 ft at 7:00am Feb 6 Observed: 15.73 ft at 7:30am Feb 6 Observed: 15.74 ft at 8:00am Feb 6 Observed: 15.73 ft at 8:30am Feb 6 Observed: 15.72 ft at 9:00am Feb 6 Observed: 15.69 ft at 9:30am Feb 6 Observed: 15.7 ft at 10:00am Feb 6 Observed: 15.69 ft at 10:30am Feb 6 Observed: 15.67 ft at 11:00am Feb 6 Observed: 15.67 ft at 11:30am Feb 6 Observed: 15.65 ft at 12:00pm Feb 6 Observed: 15.67 ft at 12:30pm Feb 6 Observed: 15.6 ft at 1:00pm Feb 6 Observed: 15.63 ft at 1:30pm Feb 6 Observed: 15.64 ft at 2:00pm Feb 6 Observed: 15.56 ft at 2:30pm Feb 6 Observed: 15.59 ft at 3:00pm Feb 6 Observed: 15.62 ft at 3:30pm Feb 6 Observed: 15.6 ft at 4:00pm Feb 6 Observed: 15.58 ft at 4:30pm Feb 6 Observed: 15.55 ft at 5:00pm Feb 6 Observed: 15.55 ft at 5:30pm Feb 6 Observed: 15.53 ft at 6:00pm Feb 6 Observed: 15.52 ft at 6:30pm Feb 6 Observed: 15.52 ft at 7:00pm Feb 6 Observed: 15.48 ft at 7:30pm Feb 6 Observed: 15.49 ft at 8:00pm Feb 6 Observed: 15.49 ft at 8:30pm Feb 6 Observed: 15.46 ft at 9:00pm Feb 6 Observed: 15.52 ft at 9:30pm Feb 6 Observed: 15.47 ft at 10:00pm Feb 6 Observed: 15.51 ft at 10:30pm Feb 6 Observed: 15.47 ft at 11:00pm Feb 6 Observed: 15.47 ft at 11:30pm Feb 6 Observed: 15.46 ft at 12:00am Feb 7 Observed: 15.48 ft at 12:30am Feb 7 Observed: 15.46 ft at 1:00am Feb 7 Observed: 15.46 ft at 1:30am Feb 7 Observed: 15.44 ft at 2:00am Feb 7 Observed: 15.45 ft at 2:30am Feb 7 Observed: 15.36 ft at 3:00am Feb 7 Observed: 15.34 ft at 3:30am Feb 7 Observed: 15.32 ft at 4:00am Feb 7 Observed: 15.29 ft at 4:30am Feb 7 Observed: 15.28 ft at 5:00am Feb 7 Observed: 15.27 ft at 5:30am Feb 7 Observed: 15.25 ft at 6:00am Feb 7 Observed: 15.24 ft at 6:30am Feb 7 Observed: 15.23 ft at 7:00am Feb 7 Observed: 15.22 ft at 7:30am Feb 7 Observed: 15.21 ft at 8:00am Feb 7 Observed: 15.19 ft at 8:30am Feb 7 Observed: 15.18 ft at 9:00am Feb 7 Observed: 15.18 ft at 9:30am Feb 7 Observed: 15.18 ft at 10:00am Feb 7 Observed: 15.15 ft at 10:30am Feb 7 Observed: 15.15 ft at 11:00am Feb 7 Observed: 15.16 ft at 11:30am Feb 7 Observed: 15.15 ft at 12:00pm Feb 7 Observed: 15.15 ft at 12:30pm Feb 7 Observed: 15.13 ft at 1:00pm Feb 7 Observed: 15.13 ft at 1:30pm Feb 7 Observed: 15.13 ft at 2:00pm Feb 7 Observed: 15.16 ft at 2:30pm Feb 7 Observed: 15.19 ft at 3:00pm Feb 7 Observed: 15.2 ft at 3:30pm Feb 7 Observed: 15.24 ft at 4:00pm Feb 7 Observed: 15.21 ft at 4:30pm Feb 7 Observed: 15.26 ft at 5:00pm Feb 7 Observed: 15.24 ft at 5:30pm Feb 7 Observed: 15.25 ft at 6:00pm Feb 7 Observed: 15.23 ft at 6:30pm Feb 7 Observed: 15.23 ft at 7:00pm Feb 7 Observed: 15.22 ft at 7:30pm Feb 7 Observed: 15.15 ft at 8:00pm Feb 7 Observed: 15.2 ft at 8:30pm Feb 7 Observed: 15.11 ft at 9:00pm Feb 7 Observed: 15.14 ft at 9:30pm Feb 7 Observed: 15.14 ft at 10:00pm Feb 7 Observed: 15.12 ft at 10:30pm Feb 7 Observed: 15.1 ft at 11:00pm Feb 7 Observed: 15.15 ft at 11:30pm Feb 7 Observed: 15.08 ft at 12:00am Feb 8 Observed: 15.09 ft at 12:30am Feb 8 Observed: 15.07 ft at 1:00am Feb 8 Observed: 15.07 ft at 1:30am Feb 8 Observed: 15.08 ft at 2:00am Feb 8 Observed: 15.06 ft at 2:30am Feb 8 Observed: 15.05 ft at 3:00am Feb 8 Observed: 15.05 ft at 3:30am Feb 8 Observed: 15.02 ft at 4:00am Feb 8 Observed: 15.02 ft at 4:30am Feb 8 Observed: 15.08 ft at 5:00am Feb 8 Observed: 15.03 ft at 5:30am Feb 8 Observed: 14.99 ft at 6:00am Feb 8 Observed: 14.98 ft at 6:30am Feb 8 Observed: 14.96 ft at 7:00am Feb 8 Observed: 14.97 ft at 7:30am Feb 8 Observed: 14.97 ft at 8:00am Feb 8 Observed: 14.94 ft at 8:30am Feb 8 Observed: 14.94 ft at 9:00am Feb 8 Observed: 14.95 ft at 9:30am Feb 8 Observed: 14.96 ft at 10:00am Feb 8 Observed: 14.97 ft at 10:30am Feb 8 Observed: 14.91 ft at 11:00am Feb 8 Observed: 14.9 ft at 11:30am Feb 8 Observed: 15 ft at 12:00pm Feb 8 Observed: 15 ft at 12:30pm Feb 8 Observed: 15 ft at 1:00pm Feb 8 Observed: 15 ft at 1:30pm Feb 8 Observed: 15.01 ft at 2:00pm Feb 8 Observed: 15.05 ft at 2:30pm Feb 8 Observed: 15.03 ft at 3:00pm Feb 8 Observed: 14.97 ft at 3:30pm Feb 8 Observed: 14.94 ft at 4:00pm Feb 8 Observed: 14.92 ft at 4:30pm Feb 8 Observed: 14.9 ft at 5:00pm Feb 8 Observed: 14.88 ft at 5:30pm Feb 8 Observed: 14.86 ft at 6:00pm Feb 8 Observed: 14.86 ft at 6:30pm Feb 8 Observed: 14.86 ft at 7:00pm Feb 8 Observed: 14.76 ft at 7:30pm Feb 8 Observed: 14.74 ft at 8:00pm Feb 8 Observed: 14.72 ft at 8:30pm Feb 8 Observed: 14.69 ft at 9:00pm Feb 8 Observed: 14.62 ft at 9:30pm Feb 8 Observed: 14.66 ft at 10:00pm Feb 8 Observed: 14.55 ft at 10:30pm Feb 8 Observed: 14.52 ft at 11:00pm Feb 8 Observed: 14.53 ft at 11:30pm Feb 8 Observed: 14.51 ft at 12:00am Feb 9 Observed: 14.53 ft at 12:30am Feb 9 Observed: 14.53 ft at 1:00am Feb 9 Observed: 14.6 ft at 1:30am Feb 9 Observed: 14.62 ft at 2:00am Feb 9 Observed: 14.62 ft at 2:30am Feb 9 Observed: 14.63 ft at 3:00am Feb 9 Observed: 14.66 ft at 3:30am Feb 9 Observed: 14.64 ft at 4:00am Feb 9 Observed: 14.65 ft at 4:30am Feb 9 Observed: 14.65 ft at 5:00am Feb 9 Observed: 14.65 ft at 5:30am Feb 9 Observed: 14.65 ft at 6:00am Feb 9 Observed: 14.65 ft at 6:30am Feb 9 Observed: 14.64 ft at 7:00am Feb 9 Observed: 14.68 ft at 7:30am Feb 9 Observed: 14.7 ft at 8:00am Feb 9 Observed: 14.71 ft at 8:30am Feb 9 Observed: 14.72 ft at 9:00am Feb 9 Observed: 14.74 ft at 9:30am Feb 9 Observed: 14.7 ft at 10:00am Feb 9 Observed: 14.73 ft at 10:30am Feb 9 Observed: 14.73 ft at 11:00am Feb 9 Observed: 14.74 ft at 11:30am Feb 9 Observed: 14.71 ft at 12:00pm Feb 9 Observed: 14.7 ft at 12:30pm Feb 9 Observed: 14.7 ft at 1:00pm Feb 9 Observed: 14.72 ft at 1:30pm Feb 9 Observed: 14.71 ft at 2:00pm Feb 9 Observed: 14.71 ft at 2:30pm Feb 9 Observed: 14.63 ft at 3:00pm Feb 9 Observed: 14.65 ft at 3:30pm Feb 9 Observed: 14.57 ft at 4:00pm Feb 9 Observed: 14.64 ft at 4:30pm Feb 9 Observed: 14.62 ft at 5:00pm Feb 9 Observed: 14.56 ft at 5:30pm Feb 9 Observed: 14.58 ft at 6:00pm Feb 9 Observed: 14.54 ft at 6:30pm Feb 9 Observed: 14.53 ft at 7:00pm Feb 9 Observed: 14.49 ft at 7:30pm Feb 9 Observed: 14.52 ft at 8:00pm Feb 9 Observed: 14.49 ft at 8:30pm Feb 9 Observed: 14.5 ft at 9:00pm Feb 9 Observed: 14.45 ft at 9:30pm Feb 9 Observed: 14.44 ft at 10:00pm Feb 9 Observed: 14.46 ft at 10:30pm Feb 9 Observed: 14.4 ft at 11:00pm Feb 9 Observed: 14.39 ft at 11:30pm Feb 9 Observed: 14.38 ft at 12:00am Feb 10 Observed: 14.37 ft at 12:30am Feb 10 Observed: 14.4 ft at 1:00am Feb 10 Observed: 14.34 ft at 1:30am Feb 10 Observed: 14.33 ft at 2:00am Feb 10 Observed: 14.33 ft at 2:30am Feb 10 Observed: 14.29 ft at 3:00am Feb 10 Observed: 14.36 ft at 3:30am Feb 10 Observed: 14.28 ft at 4:00am Feb 10 Observed: 14.17 ft at 4:30am Feb 10 Forecast: 14.4 ft at 12:00am Feb 10 Forecast: 14.2 ft at 6:00am Feb 10 Forecast: 14 ft at 12:00pm Feb 10 Forecast: 13.9 ft at 6:00pm Feb 10 Forecast: 13.8 ft at 12:00am Feb 11 Forecast: 13.7 ft at 6:00am Feb 11 Forecast: 13.6 ft at 12:00pm Feb 11 Forecast: 13.5 ft at 6:00pm Feb 11 Forecast: 13.4 ft at 12:00am Feb 12 Forecast: 13.3 ft at 6:00am Feb 12 Forecast: 13.2 ft at 12:00pm Feb 12 Forecast: 13.1 ft at 6:00pm Feb 12 Forecast: 13 ft at 12:00am Feb 13 Forecast: 12.9 ft at 6:00am Feb 13 Forecast: 12.8 ft at 12:00pm Feb 13 Forecast: 12.7 ft at 6:00pm Feb 13 Forecast: 12.6 ft at 12:00am Feb 14 Forecast: 12.6 ft at 6:00am Feb 14 Forecast: 12.5 ft at 12:00pm Feb 14 Forecast: 12.5 ft at 6:00pm Feb 14 Forecast: 12.4 ft at 12:00am Feb 15 Forecast: 12.4 ft at 6:00am Feb 15 Forecast: 12.4 ft at 12:00pm Feb 15 Forecast: 12.3 ft at 6:00pm Feb 15 Forecast: 12.3 ft at 12:00am Feb 16 Forecast: 12.3 ft at 6:00am Feb 16 Forecast: 12.3 ft at 12:00pm Feb 16 Forecast: 12.3 ft at 6:00pm Feb 16 Graph Created (5:16am Feb 10, 2010) Observed Forecast (issued 8:31pm Feb 9) LSLI2 (plotting HGIRG) Gage 0 Datum: 430.00 Latest observed value: 14.17 ft at 4:30 AM CST 10-Feb-2010. Flood Stage is 20.0 ft. Flow (kcfs)
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NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Illinois River at La Salle are issued routinely year-round.

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Upstream Gauge - at Starved Rock lock/dam Upstream Gauge Downstream Gauge Downstream Gauge - at Henry

Flood Categories (in feet)
Major Flood Stage:31
Moderate Flood Stage:27
Flood Stage:20
Action Stage:19

Historical Crests
(1) 33.79 ft on 09/16/2008
(2) 32.05 ft on 12/05/1982
(3) 32.02 ft on 03/12/2009
(4) 31.75 ft on 03/21/1979
(5) 31.70 ft on 03/06/1985
Show More Historical Crests

Illinois River at La Salle location map

Flood Impacts Collapse
33.0 The business district in La Salle floods.
31.0 Some flood damage begins in Ottawa.
30.0 Water reaches the top of the La Salle water pumping station pit.
29.0 Flooding begins in sections of Peru.
27.5 Hennepin Levee is overtopped at road crossing.
27.0 Some flooding begins to low lying residences in Ottawa.
22.0 Riverside parking lot at Starved Rock State park floods.
21.0 low lying agricultural areas from 6 miles upstream to 12 miles downstream are flooded.
20.0 agricultural areas in La Salle, Spring Valley, and Peru lowlands are flooded.
17.5 some flooding of agricultural land begins.

About This Location Expand

Other Data Sources:
Corps of Engineers (COE) Info for La Salle

Additional Information Collapse
How low could the river get?

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Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

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Romeoville, IL 60446
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