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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: 16.46 ft at 4:00pm Nov 20 Observed: 16.77 ft at 4:30pm Nov 13 Observed: 16.78 ft at 5:00pm Nov 13 Observed: 16.84 ft at 5:30pm Nov 13 Observed: 17.03 ft at 6:00pm Nov 13 Observed: 17.1 ft at 6:30pm Nov 13 Observed: 17.1 ft at 7:00pm Nov 13 Observed: 17 ft at 7:30pm Nov 13 Observed: 16.97 ft at 8:00pm Nov 13 Observed: 17.03 ft at 8:30pm Nov 13 Observed: 16.93 ft at 9:00pm Nov 13 Observed: 16.94 ft at 9:30pm Nov 13 Observed: 16.95 ft at 10:00pm Nov 13 Observed: 16.81 ft at 10:30pm Nov 13 Observed: 16.76 ft at 11:00pm Nov 13 Observed: 16.75 ft at 11:30pm Nov 13 Observed: 16.72 ft at 12:00am Nov 14 Observed: 16.64 ft at 12:30am Nov 14 Observed: 16.59 ft at 1:00am Nov 14 Observed: 16.61 ft at 1:30am Nov 14 Observed: 16.54 ft at 2:00am Nov 14 Observed: 16.62 ft at 2:30am Nov 14 Observed: 16.59 ft at 3:00am Nov 14 Observed: 16.57 ft at 3:30am Nov 14 Observed: 16.55 ft at 4:00am Nov 14 Observed: 16.54 ft at 4:30am Nov 14 Observed: 16.54 ft at 5:00am Nov 14 Observed: 16.51 ft at 5:30am Nov 14 Observed: 16.52 ft at 6:00am Nov 14 Observed: 16.57 ft at 6:30am Nov 14 Observed: 16.59 ft at 7:00am Nov 14 Observed: 16.59 ft at 7:30am Nov 14 Observed: 16.6 ft at 8:00am Nov 14 Observed: 16.59 ft at 8:30am Nov 14 Observed: 16.58 ft at 9:00am Nov 14 Observed: 16.56 ft at 9:30am Nov 14 Observed: 16.58 ft at 10:00am Nov 14 Observed: 16.58 ft at 10:30am Nov 14 Observed: 16.63 ft at 11:00am Nov 14 Observed: 16.56 ft at 11:30am Nov 14 Observed: 16.55 ft at 12:00pm Nov 14 Observed: 16.55 ft at 12:30pm Nov 14 Observed: 16.55 ft at 1:00pm Nov 14 Observed: 16.55 ft at 1:30pm Nov 14 Observed: 16.53 ft at 2:00pm Nov 14 Observed: 16.52 ft at 2:30pm Nov 14 Observed: 16.53 ft at 3:00pm Nov 14 Observed: 16.52 ft at 3:30pm Nov 14 Observed: 16.51 ft at 4:00pm Nov 14 Observed: 16.51 ft at 4:30pm Nov 14 Observed: 16.5 ft at 5:00pm Nov 14 Observed: 16.56 ft at 5:30pm Nov 14 Observed: 16.53 ft at 6:00pm Nov 14 Observed: 16.54 ft at 6:30pm Nov 14 Observed: 16.55 ft at 7:00pm Nov 14 Observed: 16.55 ft at 7:30pm Nov 14 Observed: 16.54 ft at 8:00pm Nov 14 Observed: 16.53 ft at 8:30pm Nov 14 Observed: 16.54 ft at 9:00pm Nov 14 Observed: 16.52 ft at 9:30pm Nov 14 Observed: 16.55 ft at 10:00pm Nov 14 Observed: 16.54 ft at 10:30pm Nov 14 Observed: 16.53 ft at 11:00pm Nov 14 Observed: 16.47 ft at 11:30pm Nov 14 Observed: 16.42 ft at 12:00am Nov 15 Observed: 16.4 ft at 12:30am Nov 15 Observed: 16.39 ft at 1:00am Nov 15 Observed: 16.38 ft at 1:30am Nov 15 Observed: 16.37 ft at 2:00am Nov 15 Observed: 16.29 ft at 2:30am Nov 15 Observed: 16.27 ft at 3:00am Nov 15 Observed: 16.22 ft at 3:30am Nov 15 Observed: 16.2 ft at 4:00am Nov 15 Observed: 16.19 ft at 4:30am Nov 15 Observed: 16.15 ft at 5:00am Nov 15 Observed: 16.16 ft at 5:30am Nov 15 Observed: 16.16 ft at 6:00am Nov 15 Observed: 16.11 ft at 6:30am Nov 15 Observed: 16.07 ft at 7:00am Nov 15 Observed: 16.06 ft at 7:30am Nov 15 Observed: 16.06 ft at 8:00am Nov 15 Observed: 15.87 ft at 8:30am Nov 15 Observed: 15.83 ft at 9:00am Nov 15 Observed: 15.83 ft at 9:30am Nov 15 Observed: 15.81 ft at 10:00am Nov 15 Observed: 15.81 ft at 10:30am Nov 15 Observed: 15.74 ft at 11:00am Nov 15 Observed: 15.72 ft at 11:30am Nov 15 Observed: 15.71 ft at 12:00pm Nov 15 Observed: 15.66 ft at 12:30pm Nov 15 Observed: 15.67 ft at 1:00pm Nov 15 Observed: 15.7 ft at 1:30pm Nov 15 Observed: 15.72 ft at 2:00pm Nov 15 Observed: 15.75 ft at 2:30pm Nov 15 Observed: 15.77 ft at 3:00pm Nov 15 Observed: 15.76 ft at 3:30pm Nov 15 Observed: 15.79 ft at 4:00pm Nov 15 Observed: 15.82 ft at 4:30pm Nov 15 Observed: 15.81 ft at 5:00pm Nov 15 Observed: 15.82 ft at 5:30pm Nov 15 Observed: 15.83 ft at 6:00pm Nov 15 Observed: 15.8 ft at 6:30pm Nov 15 Observed: 15.82 ft at 7:00pm Nov 15 Observed: 15.8 ft at 7:30pm Nov 15 Observed: 15.8 ft at 8:00pm Nov 15 Observed: 15.82 ft at 8:30pm Nov 15 Observed: 15.81 ft at 9:00pm Nov 15 Observed: 15.81 ft at 9:30pm Nov 15 Observed: 15.83 ft at 10:00pm Nov 15 Observed: 15.86 ft at 10:30pm Nov 15 Observed: 15.84 ft at 11:00pm Nov 15 Observed: 15.78 ft at 11:30pm Nov 15 Observed: 15.8 ft at 12:00am Nov 16 Observed: 15.76 ft at 12:30am Nov 16 Observed: 15.75 ft at 1:00am Nov 16 Observed: 15.75 ft at 1:30am Nov 16 Observed: 15.77 ft at 2:00am Nov 16 Observed: 15.74 ft at 2:30am Nov 16 Observed: 15.74 ft at 3:00am Nov 16 Observed: 15.71 ft at 3:30am Nov 16 Observed: 15.71 ft at 4:00am Nov 16 Observed: 15.69 ft at 4:30am Nov 16 Observed: 15.7 ft at 5:00am Nov 16 Observed: 15.72 ft at 5:30am Nov 16 Observed: 15.67 ft at 6:00am Nov 16 Observed: 15.68 ft at 6:30am Nov 16 Observed: 15.63 ft at 7:00am Nov 16 Observed: 15.58 ft at 7:30am Nov 16 Observed: 15.53 ft at 8:00am Nov 16 Observed: 15.47 ft at 8:30am Nov 16 Observed: 15.38 ft at 9:00am Nov 16 Observed: 15.32 ft at 9:30am Nov 16 Observed: 15.43 ft at 10:00am Nov 16 Observed: 15.44 ft at 10:30am Nov 16 Observed: 15.47 ft at 11:00am Nov 16 Observed: 15.39 ft at 11:30am Nov 16 Observed: 15.36 ft at 12:00pm Nov 16 Observed: 15.41 ft at 12:30pm Nov 16 Observed: 15.39 ft at 1:00pm Nov 16 Observed: 15.36 ft at 1:30pm Nov 16 Observed: 15.36 ft at 2:00pm Nov 16 Observed: 15.33 ft at 2:30pm Nov 16 Observed: 15.3 ft at 3:00pm Nov 16 Observed: 15.31 ft at 3:30pm Nov 16 Observed: 15.29 ft at 4:00pm Nov 16 Observed: 15.3 ft at 4:30pm Nov 16 Observed: 15.29 ft at 5:00pm Nov 16 Observed: 15.28 ft at 5:30pm Nov 16 Observed: 15.27 ft at 6:00pm Nov 16 Observed: 15.27 ft at 6:30pm Nov 16 Observed: 15.25 ft at 7:00pm Nov 16 Observed: 15.23 ft at 7:30pm Nov 16 Observed: 15.24 ft at 8:00pm Nov 16 Observed: 15.23 ft at 8:30pm Nov 16 Observed: 15.21 ft at 9:00pm Nov 16 Observed: 15.2 ft at 9:30pm Nov 16 Observed: 15.19 ft at 10:00pm Nov 16 Observed: 15.18 ft at 10:30pm Nov 16 Observed: 15.16 ft at 11:00pm Nov 16 Observed: 15.18 ft at 11:30pm Nov 16 Observed: 15.17 ft at 12:00am Nov 17 Observed: 15.14 ft at 12:30am Nov 17 Observed: 15.15 ft at 1:00am Nov 17 Observed: 15.08 ft at 1:30am Nov 17 Observed: 15.01 ft at 2:00am Nov 17 Observed: 15.02 ft at 2:30am Nov 17 Observed: 14.98 ft at 3:00am Nov 17 Observed: 14.97 ft at 3:30am Nov 17 Observed: 14.96 ft at 4:00am Nov 17 Observed: 14.94 ft at 4:30am Nov 17 Observed: 14.92 ft at 5:00am Nov 17 Observed: 14.93 ft at 5:30am Nov 17 Observed: 14.91 ft at 6:00am Nov 17 Observed: 14.91 ft at 6:30am Nov 17 Observed: 14.94 ft at 7:00am Nov 17 Observed: 14.96 ft at 7:30am Nov 17 Observed: 14.96 ft at 8:00am Nov 17 Observed: 14.94 ft at 8:30am Nov 17 Observed: 14.97 ft at 9:00am Nov 17 Observed: 14.97 ft at 9:30am Nov 17 Observed: 14.94 ft at 10:00am Nov 17 Observed: 15.04 ft at 10:30am Nov 17 Observed: 15.12 ft at 11:00am Nov 17 Observed: 15.14 ft at 11:30am Nov 17 Observed: 15.08 ft at 12:00pm Nov 17 Observed: 15.07 ft at 12:30pm Nov 17 Observed: 15.07 ft at 1:00pm Nov 17 Observed: 15.07 ft at 1:30pm Nov 17 Observed: 15.07 ft at 2:00pm Nov 17 Observed: 15.07 ft at 2:30pm Nov 17 Observed: 15.09 ft at 3:00pm Nov 17 Observed: 15.07 ft at 3:30pm Nov 17 Observed: 14.92 ft at 4:00pm Nov 17 Observed: 14.88 ft at 4:30pm Nov 17 Observed: 14.83 ft at 5:00pm Nov 17 Observed: 14.84 ft at 5:30pm Nov 17 Observed: 15.02 ft at 6:00pm Nov 17 Observed: 14.76 ft at 6:30pm Nov 17 Observed: 14.77 ft at 7:00pm Nov 17 Observed: 14.76 ft at 7:30pm Nov 17 Observed: 14.76 ft at 8:00pm Nov 17 Observed: 14.69 ft at 8:30pm Nov 17 Observed: 14.69 ft at 9:00pm Nov 17 Observed: 14.69 ft at 9:30pm Nov 17 Observed: 14.77 ft at 10:00pm Nov 17 Observed: 14.86 ft at 10:30pm Nov 17 Observed: 14.88 ft at 11:00pm Nov 17 Observed: 14.88 ft at 11:30pm Nov 17 Observed: 14.96 ft at 12:00am Nov 18 Observed: 14.93 ft at 12:30am Nov 18 Observed: 14.95 ft at 1:00am Nov 18 Observed: 14.95 ft at 1:30am Nov 18 Observed: 14.94 ft at 2:00am Nov 18 Observed: 14.97 ft at 2:30am Nov 18 Observed: 14.95 ft at 3:00am Nov 18 Observed: 15.14 ft at 3:30am Nov 18 Observed: 15.17 ft at 4:00am Nov 18 Observed: 15.23 ft at 4:30am Nov 18 Observed: 15.27 ft at 5:00am Nov 18 Observed: 15.25 ft at 5:30am Nov 18 Observed: 15.24 ft at 6:00am Nov 18 Observed: 15.25 ft at 6:30am Nov 18 Observed: 15.25 ft at 7:00am Nov 18 Observed: 15.26 ft at 7:30am Nov 18 Observed: 15.27 ft at 8:00am Nov 18 Observed: 15.28 ft at 8:30am Nov 18 Observed: 15.34 ft at 9:00am Nov 18 Observed: 15.31 ft at 9:30am Nov 18 Observed: 15.31 ft at 10:00am Nov 18 Observed: 15.21 ft at 10:30am Nov 18 Observed: 15.2 ft at 11:00am Nov 18 Observed: 15.17 ft at 11:30am Nov 18 Observed: 15.14 ft at 12:00pm Nov 18 Observed: 15.15 ft at 12:30pm Nov 18 Observed: 15.14 ft at 1:00pm Nov 18 Observed: 15.15 ft at 1:30pm Nov 18 Observed: 15.13 ft at 2:00pm Nov 18 Observed: 15.15 ft at 2:30pm Nov 18 Observed: 15.12 ft at 3:00pm Nov 18 Observed: 15.14 ft at 3:30pm Nov 18 Observed: 15.16 ft at 4:00pm Nov 18 Observed: 15.14 ft at 4:30pm Nov 18 Observed: 15.16 ft at 5:00pm Nov 18 Observed: 15.21 ft at 5:30pm Nov 18 Observed: 15.17 ft at 6:00pm Nov 18 Observed: 15.18 ft at 6:30pm Nov 18 Observed: 15.21 ft at 7:00pm Nov 18 Observed: 15.22 ft at 7:30pm Nov 18 Observed: 15.25 ft at 8:00pm Nov 18 Observed: 15.3 ft at 8:30pm Nov 18 Observed: 15.33 ft at 9:00pm Nov 18 Observed: 15.36 ft at 9:30pm Nov 18 Observed: 15.38 ft at 10:00pm Nov 18 Observed: 15.4 ft at 10:30pm Nov 18 Observed: 15.43 ft at 11:00pm Nov 18 Observed: 15.47 ft at 11:30pm Nov 18 Observed: 15.53 ft at 12:00am Nov 19 Observed: 15.58 ft at 12:30am Nov 19 Observed: 15.6 ft at 1:00am Nov 19 Observed: 15.62 ft at 1:30am Nov 19 Observed: 15.65 ft at 2:00am Nov 19 Observed: 15.73 ft at 2:30am Nov 19 Observed: 15.7 ft at 3:00am Nov 19 Observed: 15.73 ft at 3:30am Nov 19 Observed: 15.74 ft at 4:00am Nov 19 Observed: 15.75 ft at 4:30am Nov 19 Observed: 15.77 ft at 5:00am Nov 19 Observed: 15.78 ft at 5:30am Nov 19 Observed: 15.81 ft at 6:00am Nov 19 Observed: 15.82 ft at 6:30am Nov 19 Observed: 15.93 ft at 7:00am Nov 19 Observed: 15.98 ft at 7:30am Nov 19 Observed: 16.02 ft at 8:00am Nov 19 Observed: 16.07 ft at 8:30am Nov 19 Observed: 16.04 ft at 9:00am Nov 19 Observed: 16.11 ft at 9:30am Nov 19 Observed: 16.13 ft at 10:00am Nov 19 Observed: 16.11 ft at 10:30am Nov 19 Observed: 16.06 ft at 11:00am Nov 19 Observed: 16.02 ft at 11:30am Nov 19 Observed: 16.02 ft at 12:00pm Nov 19 Observed: 15.98 ft at 12:30pm Nov 19 Observed: 16 ft at 1:00pm Nov 19 Observed: 15.97 ft at 1:30pm Nov 19 Observed: 15.97 ft at 2:00pm Nov 19 Observed: 15.98 ft at 2:30pm Nov 19 Observed: 15.97 ft at 3:00pm Nov 19 Observed: 16 ft at 3:30pm Nov 19 Observed: 16.03 ft at 4:00pm Nov 19 Observed: 16.05 ft at 4:30pm Nov 19 Observed: 16.05 ft at 5:00pm Nov 19 Observed: 16.07 ft at 5:30pm Nov 19 Observed: 16.1 ft at 6:00pm Nov 19 Observed: 16.1 ft at 6:30pm Nov 19 Observed: 16.09 ft at 7:00pm Nov 19 Observed: 16.09 ft at 7:30pm Nov 19 Observed: 16.03 ft at 8:00pm Nov 19 Observed: 16.02 ft at 8:30pm Nov 19 Observed: 16.01 ft at 9:00pm Nov 19 Observed: 16 ft at 9:30pm Nov 19 Observed: 15.99 ft at 10:00pm Nov 19 Observed: 16 ft at 10:30pm Nov 19 Observed: 15.99 ft at 11:00pm Nov 19 Observed: 15.98 ft at 11:30pm Nov 19 Observed: 15.96 ft at 12:00am Nov 20 Observed: 15.96 ft at 12:30am Nov 20 Observed: 15.97 ft at 1:00am Nov 20 Observed: 15.98 ft at 1:30am Nov 20 Observed: 15.98 ft at 2:00am Nov 20 Observed: 15.95 ft at 2:30am Nov 20 Observed: 15.95 ft at 3:00am Nov 20 Observed: 15.95 ft at 3:30am Nov 20 Observed: 15.94 ft at 4:00am Nov 20 Observed: 15.93 ft at 4:30am Nov 20 Observed: 15.94 ft at 5:00am Nov 20 Observed: 15.94 ft at 5:30am Nov 20 Observed: 15.94 ft at 6:00am Nov 20 Observed: 16.05 ft at 6:30am Nov 20 Observed: 16.08 ft at 7:00am Nov 20 Observed: 16.14 ft at 7:30am Nov 20 Observed: 16.14 ft at 8:00am Nov 20 Observed: 16.23 ft at 8:30am Nov 20 Observed: 16.22 ft at 9:00am Nov 20 Observed: 16.21 ft at 9:30am Nov 20 Observed: 16.23 ft at 10:00am Nov 20 Observed: 16.24 ft at 10:30am Nov 20 Observed: 16.25 ft at 11:00am Nov 20 Observed: 16.36 ft at 11:30am Nov 20 Observed: 16.38 ft at 12:00pm Nov 20 Observed: 16.36 ft at 12:30pm Nov 20 Observed: 16.38 ft at 1:00pm Nov 20 Observed: 16.4 ft at 1:30pm Nov 20 Observed: 16.42 ft at 2:00pm Nov 20 Observed: 16.44 ft at 2:30pm Nov 20 Observed: 16.45 ft at 3:00pm Nov 20 Observed: 16.45 ft at 3:30pm Nov 20 Observed: 16.46 ft at 4:00pm Nov 20 Observed: 16.39 ft at 4:30pm Nov 20 Observed: 16.38 ft at 5:00pm Nov 20 Observed: 16.36 ft at 5:30pm Nov 20 Observed: 16.27 ft at 6:00pm Nov 20 Observed: 16.24 ft at 6:30pm Nov 20 Observed: 16.21 ft at 7:00pm Nov 20 Observed: 16.2 ft at 7:30pm Nov 20 Observed: 16.2 ft at 8:00pm Nov 20 Observed: 16.19 ft at 8:30pm Nov 20 Observed: 16.18 ft at 9:00pm Nov 20 Observed: 16.18 ft at 9:30pm Nov 20 Observed: 16.18 ft at 10:00pm Nov 20 Observed: 16.17 ft at 10:30pm Nov 20 Observed: 16.16 ft at 11:00pm Nov 20 Observed: 16.16 ft at 11:30pm Nov 20 Observed: 16.19 ft at 12:00am Nov 21 Observed: 16.18 ft at 12:30am Nov 21 Observed: 16.18 ft at 1:00am Nov 21 Observed: 16.19 ft at 1:30am Nov 21 Observed: 16.18 ft at 2:00am Nov 21 Observed: 16.21 ft at 2:30am Nov 21 Observed: 16.11 ft at 3:00am Nov 21 Observed: 16.09 ft at 3:30am Nov 21 Observed: 16.05 ft at 4:00am Nov 21 Observed: 16.03 ft at 4:30am Nov 21 Observed: 16 ft at 5:00am Nov 21 Observed: 15.99 ft at 5:30am Nov 21 Observed: 15.97 ft at 6:00am Nov 21 Observed: 15.97 ft at 6:30am Nov 21 Observed: 15.95 ft at 7:00am Nov 21 Observed: 16.03 ft at 7:30am Nov 21 Observed: 16.05 ft at 8:00am Nov 21 Observed: 16.06 ft at 8:30am Nov 21 Observed: 16.07 ft at 9:00am Nov 21 Observed: 16.06 ft at 9:30am Nov 21 Observed: 16.08 ft at 10:00am Nov 21 Observed: 16.07 ft at 10:30am Nov 21 Observed: 16.05 ft at 11:00am Nov 21 Observed: 16.08 ft at 11:30am Nov 21 Observed: 16.08 ft at 12:00pm Nov 21 Observed: 16.05 ft at 12:30pm Nov 21 Observed: 16.08 ft at 1:00pm Nov 21 Observed: 16.06 ft at 1:30pm Nov 21 Observed: 16.08 ft at 2:00pm Nov 21 Observed: 16.05 ft at 2:30pm Nov 21 Observed: 16.07 ft at 3:00pm Nov 21 Observed: 16.06 ft at 3:30pm Nov 21 Observed: 16.07 ft at 4:00pm Nov 21 Observed: 16.06 ft at 4:30pm Nov 21 Observed: 16.06 ft at 5:00pm Nov 21 Observed: 16.08 ft at 5:30pm Nov 21 Observed: 16.08 ft at 6:00pm Nov 21 Observed: 16.1 ft at 6:30pm Nov 21 Observed: 16.08 ft at 7:00pm Nov 21 Observed: 16.08 ft at 7:30pm Nov 21 Observed: 16.09 ft at 8:00pm Nov 21 Observed: 16.06 ft at 8:30pm Nov 21 Observed: 16.09 ft at 9:00pm Nov 21 Observed: 16.06 ft at 9:30pm Nov 21 Observed: 16.06 ft at 10:00pm Nov 21 Observed: 16.05 ft at 10:30pm Nov 21 Observed: 16.07 ft at 11:00pm Nov 21 Observed: 16.05 ft at 11:30pm Nov 21 Observed: 16.1 ft at 12:00am Nov 22 Observed: 16.06 ft at 12:30am Nov 22 Observed: 16.01 ft at 1:00am Nov 22 Observed: 16 ft at 1:30am Nov 22 Observed: 15.98 ft at 2:00am Nov 22 Observed: 16 ft at 2:30am Nov 22 Observed: 15.91 ft at 3:00am Nov 22 Observed: 16.01 ft at 3:30am Nov 22 Observed: 15.95 ft at 4:00am Nov 22 Observed: 15.93 ft at 4:30am Nov 22 Observed: 15.93 ft at 5:00am Nov 22 Observed: 15.99 ft at 5:30am Nov 22 Observed: 16 ft at 6:00am Nov 22 Observed: 15.98 ft at 6:30am Nov 22 Observed: 16.02 ft at 7:00am Nov 22 Observed: 16.01 ft at 7:30am Nov 22 Observed: 15.99 ft at 8:00am Nov 22 Observed: 16.06 ft at 8:30am Nov 22 Observed: 15.99 ft at 9:00am Nov 22 Observed: 16 ft at 9:30am Nov 22 Observed: 16.01 ft at 10:00am Nov 22 Observed: 16.01 ft at 10:30am Nov 22 Observed: 16 ft at 11:00am Nov 22 Observed: 16 ft at 11:30am Nov 22 Observed: 16 ft at 12:00pm Nov 22 Observed: 16.02 ft at 12:30pm Nov 22 Observed: 16 ft at 1:00pm Nov 22 Observed: 16 ft at 1:30pm Nov 22 Observed: 16 ft at 2:00pm Nov 22 Observed: 15.99 ft at 2:30pm Nov 22 Observed: 15.99 ft at 3:00pm Nov 22 Observed: 16 ft at 3:30pm Nov 22 Observed: 15.97 ft at 4:00pm Nov 22 Observed: 16 ft at 4:30pm Nov 22 Observed: 15.97 ft at 5:00pm Nov 22 Observed: 15.97 ft at 5:30pm Nov 22 Observed: 15.96 ft at 6:00pm Nov 22 Observed: 15.97 ft at 6:30pm Nov 22 Observed: 15.9 ft at 7:00pm Nov 22 Observed: 15.89 ft at 7:30pm Nov 22 Observed: 15.87 ft at 8:00pm Nov 22 Observed: 15.87 ft at 8:30pm Nov 22 Observed: 15.85 ft at 9:00pm Nov 22 Observed: 15.84 ft at 9:30pm Nov 22 Observed: 15.83 ft at 10:00pm Nov 22 Observed: 15.82 ft at 10:30pm Nov 22 Observed: 15.82 ft at 11:00pm Nov 22 Observed: 15.81 ft at 11:30pm Nov 22 Observed: 15.79 ft at 12:00am Nov 23 Observed: 15.8 ft at 12:30am Nov 23 Observed: 15.79 ft at 1:00am Nov 23 Observed: 15.79 ft at 1:30am Nov 23 Observed: 15.63 ft at 2:00am Nov 23 Observed: 15.44 ft at 2:30am Nov 23 Observed: 15.42 ft at 3:00am Nov 23 Observed: 15.37 ft at 3:30am Nov 23 Observed: 15.37 ft at 4:00am Nov 23 Observed: 15.48 ft at 4:30am Nov 23 Observed: 15.46 ft at 5:00am Nov 23 Observed: 15.42 ft at 5:30am Nov 23 Observed: 15.54 ft at 6:00am Nov 23 Observed: 15.56 ft at 6:30am Nov 23 Observed: 15.58 ft at 7:00am Nov 23 Observed: 15.59 ft at 7:30am Nov 23 Observed: 15.59 ft at 8:00am Nov 23 Observed: 15.61 ft at 8:30am Nov 23 Observed: 15.61 ft at 9:00am Nov 23 Observed: 15.59 ft at 9:30am Nov 23 Observed: 15.6 ft at 10:00am Nov 23 Observed: 15.58 ft at 10:30am Nov 23 Observed: 15.61 ft at 11:00am Nov 23 Observed: 15.62 ft at 11:30am Nov 23 Observed: 15.6 ft at 12:00pm Nov 23 Observed: 15.63 ft at 12:30pm Nov 23 Observed: 15.61 ft at 1:00pm Nov 23 Observed: 15.61 ft at 1:30pm Nov 23 Observed: 15.62 ft at 2:00pm Nov 23 Observed: 15.61 ft at 2:30pm Nov 23 Observed: 15.62 ft at 3:00pm Nov 23 Observed: 15.59 ft at 3:30pm Nov 23 Forecast: 15.6 ft at 12:00pm Nov 23 Forecast: 15.5 ft at 6:00pm Nov 23 Forecast: 15.4 ft at 12:00am Nov 24 Forecast: 15.2 ft at 6:00am Nov 24 Forecast: 15.1 ft at 12:00pm Nov 24 Forecast: 15 ft at 6:00pm Nov 24 Forecast: 14.9 ft at 12:00am Nov 25 Forecast: 14.8 ft at 6:00am Nov 25 Forecast: 14.7 ft at 12:00pm Nov 25 Forecast: 14.6 ft at 6:00pm Nov 25 Forecast: 14.5 ft at 12:00am Nov 26 Forecast: 14.4 ft at 6:00am Nov 26 Forecast: 14.3 ft at 12:00pm Nov 26 Forecast: 14.2 ft at 6:00pm Nov 26 Forecast: 14.1 ft at 12:00am Nov 27 Forecast: 14.1 ft at 6:00am Nov 27 Forecast: 14 ft at 12:00pm Nov 27 Forecast: 13.9 ft at 6:00pm Nov 27 Forecast: 13.8 ft at 12:00am Nov 28 Forecast: 13.7 ft at 6:00am Nov 28 Forecast: 13.7 ft at 12:00pm Nov 28 Forecast: 13.6 ft at 6:00pm Nov 28 Forecast: 13.5 ft at 12:00am Nov 29 Forecast: 13.4 ft at 6:00am Nov 29 Forecast: 13.4 ft at 12:00pm Nov 29 Forecast: 13.3 ft at 6:00pm Nov 29 Forecast: 13.2 ft at 12:00am Nov 30 Forecast: 13.1 ft at 6:00am Nov 30 Graph Created (4:26pm Nov 23, 2009) Observed Forecast (issued 10:00am Nov 23) LSLI2 (plotting HGIRG) Gage 0 Datum: 430.00 Latest observed value: 15.59 ft at 3:30 PM CST 23-Nov-2009. Flood Stage is 20.0 ft. Forecast data shown here are guidance values only. Please refer to your local NWS office for the latest official public river forecasts. 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.

NWS Information
National Weather Service
Chicago Weather Forecast Office
333 W. University Dr.
Romeoville, IL 60446
(815) 834-1435
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