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Hydrograph River at a Glance Download
Fox River at McHenry (Stratton Lock and Dam) tailwater Tailwater (ft)Flow (kcfs)Observed: 0.72 ft at 1:45PM Jul 29, 2021Observed: 0.84 ft at 2:00PM Jul 29, 2021Observed: 0.84 ft at 2:15PM Jul 29, 2021Observed: 0.71 ft at 2:30PM Jul 29, 2021Observed: 0.7 ft at 2:45PM Jul 29, 2021Observed: 0.74 ft at 3:00PM Jul 29, 2021Observed: 0.79 ft at 3:15PM Jul 29, 2021Observed: 0.77 ft at 3:30PM Jul 29, 2021Observed: 0.69 ft at 3:45PM Jul 29, 2021Observed: 0.82 ft at 4:00PM Jul 29, 2021Observed: 0.76 ft at 4:15PM Jul 29, 2021Observed: 0.71 ft at 4:30PM Jul 29, 2021Observed: 0.86 ft at 4:45PM Jul 29, 2021Observed: 0.78 ft at 5:00PM Jul 29, 2021Observed: 0.81 ft at 5:15PM Jul 29, 2021Observed: 0.73 ft at 5:30PM Jul 29, 2021Observed: 0.92 ft at 5:45PM Jul 29, 2021Observed: 0.8 ft at 6:00PM Jul 29, 2021Observed: 0.78 ft at 6:15PM Jul 29, 2021Highest Observation: 0.93 ft at 6:30PM Jul 29, 2021Observed: 0.82 ft at 6:45PM Jul 29, 2021Observed: 0.76 ft at 7:00PM Jul 29, 2021Observed: 0.83 ft at 7:15PM Jul 29, 2021Observed: 0.83 ft at 7:30PM Jul 29, 2021Observed: 0.91 ft at 7:45PM Jul 29, 2021Observed: 0.84 ft at 8:00PM Jul 29, 2021Observed: 0.78 ft at 8:15PM Jul 29, 2021Observed: 0.82 ft at 8:30PM Jul 29, 2021Observed: 0.77 ft at 8:45PM Jul 29, 2021Observed: 0.8 ft at 9:00PM Jul 29, 2021Observed: 0.79 ft at 9:15PM Jul 29, 2021Observed: 0.79 ft at 9:30PM Jul 29, 2021Observed: 0.79 ft at 9:45PM Jul 29, 2021Observed: 0.79 ft at 10:00PM Jul 29, 2021Observed: 0.78 ft at 10:15PM Jul 29, 2021Observed: 0.78 ft at 10:30PM Jul 29, 2021Observed: 0.78 ft at 10:45PM Jul 29, 2021Observed: 0.78 ft at 11:00PM Jul 29, 2021Observed: 0.77 ft at 11:15PM Jul 29, 2021Observed: 0.77 ft at 11:30PM Jul 29, 2021Observed: 0.76 ft at 11:45PM Jul 29, 2021Observed: 0.76 ft at 12:00AM Jul 30, 2021Observed: 0.76 ft at 12:15AM Jul 30, 2021Observed: 0.76 ft at 12:30AM Jul 30, 2021Observed: 0.75 ft at 12:45AM Jul 30, 2021Observed: 0.75 ft at 1:00AM Jul 30, 2021Observed: 0.76 ft at 1:15AM Jul 30, 2021Observed: 0.75 ft at 1:30AM Jul 30, 2021Observed: 0.75 ft at 1:45AM Jul 30, 2021Observed: 0.75 ft at 2:00AM Jul 30, 2021Observed: 0.76 ft at 2:15AM Jul 30, 2021Observed: 0.76 ft at 2:30AM Jul 30, 2021Observed: 0.76 ft at 2:45AM Jul 30, 2021Observed: 0.76 ft at 3:00AM Jul 30, 2021Observed: 0.76 ft at 3:15AM Jul 30, 2021Observed: 0.75 ft at 3:30AM Jul 30, 2021Observed: 0.75 ft at 3:45AM Jul 30, 2021Observed: 0.76 ft at 4:00AM Jul 30, 2021Observed: 0.75 ft at 4:15AM Jul 30, 2021Observed: 0.74 ft at 4:30AM Jul 30, 2021Observed: 0.74 ft at 4:45AM Jul 30, 2021Observed: 0.73 ft at 5:00AM Jul 30, 2021Observed: 0.73 ft at 5:15AM Jul 30, 2021Observed: 0.73 ft at 5:30AM Jul 30, 2021Observed: 0.73 ft at 5:45AM Jul 30, 2021Observed: 0.73 ft at 6:00AM Jul 30, 2021Observed: 0.72 ft at 6:15AM Jul 30, 2021Observed: 0.72 ft at 6:30AM Jul 30, 2021Observed: 0.72 ft at 6:45AM Jul 30, 2021Observed: 0.72 ft at 7:00AM Jul 30, 2021Observed: 0.72 ft at 7:15AM Jul 30, 2021Observed: 0.72 ft at 7:30AM Jul 30, 2021Observed: 0.7 ft at 7:45AM Jul 30, 2021Observed: 0.71 ft at 8:00AM Jul 30, 2021Observed: 0.72 ft at 8:15AM Jul 30, 2021Observed: 0.71 ft at 8:30AM Jul 30, 2021Observed: 0.66 ft at 8:45AM Jul 30, 2021Observed: 0.76 ft at 9:00AM Jul 30, 2021Observed: 0.6 ft at 9:15AM Jul 30, 2021Observed: 0.73 ft at 9:30AM Jul 30, 2021Observed: 0.72 ft at 9:45AM Jul 30, 2021Observed: 0.71 ft at 10:00AM Jul 30, 2021Observed: 0.67 ft at 10:15AM Jul 30, 2021Observed: 0.68 ft at 10:30AM Jul 30, 2021Observed: 0.76 ft at 10:45AM Jul 30, 2021Observed: 0.64 ft at 11:00AM Jul 30, 2021Observed: 0.73 ft at 11:15AM Jul 30, 2021Observed: 0.59 ft at 11:30AM Jul 30, 2021Observed: 0.67 ft at 11:45AM Jul 30, 2021Observed: 0.89 ft at 12:00PM Jul 30, 2021Observed: 0.65 ft at 12:15PM Jul 30, 2021Observed: 0.64 ft at 12:30PM Jul 30, 2021Observed: 0.8 ft at 12:45PM Jul 30, 2021Observed: 0.65 ft at 1:00PM Jul 30, 2021Observed: 0.74 ft at 1:15PM Jul 30, 2021Observed: 0.69 ft at 1:30PM Jul 30, 2021Observed: 0.64 ft at 1:45PM Jul 30, 2021Observed: 0.72 ft at 2:00PM Jul 30, 2021Observed: 0.68 ft at 2:15PM Jul 30, 2021Observed: 0.74 ft at 2:30PM Jul 30, 2021Observed: 0.89 ft at 2:45PM Jul 30, 2021Observed: 0.73 ft at 3:00PM Jul 30, 2021Observed: 0.78 ft at 3:15PM Jul 30, 2021Observed: 0.62 ft at 3:30PM Jul 30, 2021Observed: 0.76 ft at 3:45PM Jul 30, 2021Observed: 0.66 ft at 4:00PM Jul 30, 2021Observed: 0.71 ft at 4:15PM Jul 30, 2021Observed: 0.86 ft at 4:30PM Jul 30, 2021Observed: 0.74 ft at 4:45PM Jul 30, 2021Observed: 0.81 ft at 5:00PM Jul 30, 2021Observed: 0.68 ft at 5:15PM Jul 30, 2021Observed: 0.77 ft at 5:30PM Jul 30, 2021Observed: 0.67 ft at 5:45PM Jul 30, 2021Observed: 0.76 ft at 6:00PM Jul 30, 2021Observed: 0.61 ft at 6:15PM Jul 30, 2021Observed: 0.66 ft at 6:30PM Jul 30, 2021Observed: 0.68 ft at 6:45PM Jul 30, 2021Observed: 0.7 ft at 7:00PM Jul 30, 2021Observed: 0.83 ft at 7:15PM Jul 30, 2021Observed: 0.64 ft at 7:30PM Jul 30, 2021Observed: 0.78 ft at 7:45PM Jul 30, 2021Observed: 0.69 ft at 8:00PM Jul 30, 2021Observed: 0.78 ft at 8:15PM Jul 30, 2021Observed: 0.7 ft at 8:30PM Jul 30, 2021Observed: 0.79 ft at 8:45PM Jul 30, 2021Observed: 0.64 ft at 9:00PM Jul 30, 2021Observed: 0.71 ft at 9:15PM Jul 30, 2021Observed: 0.78 ft at 9:30PM Jul 30, 2021Observed: 0.62 ft at 9:45PM Jul 30, 2021Observed: 0.66 ft at 10:00PM Jul 30, 2021Observed: 0.72 ft at 10:15PM Jul 30, 2021Observed: 0.69 ft at 10:30PM Jul 30, 2021Observed: 0.74 ft at 10:45PM Jul 30, 2021Observed: 0.71 ft at 11:00PM Jul 30, 2021Observed: 0.65 ft at 11:15PM Jul 30, 2021Observed: 0.67 ft at 11:30PM Jul 30, 2021Observed: 0.68 ft at 11:45PM Jul 30, 2021Observed: 0.66 ft at 12:00AM Jul 31, 2021Observed: 0.66 ft at 12:15AM Jul 31, 2021Observed: 0.66 ft at 12:30AM Jul 31, 2021Observed: 0.66 ft at 12:45AM Jul 31, 2021Observed: 0.65 ft at 1:00AM Jul 31, 2021Observed: 0.65 ft at 1:15AM Jul 31, 2021Observed: 0.66 ft at 1:30AM Jul 31, 2021Observed: 0.65 ft at 1:45AM Jul 31, 2021Observed: 0.65 ft at 2:00AM Jul 31, 2021Observed: 0.65 ft at 2:15AM Jul 31, 2021Observed: 0.65 ft at 2:30AM Jul 31, 2021Observed: 0.65 ft at 2:45AM Jul 31, 2021Observed: 0.65 ft at 3:00AM Jul 31, 2021Observed: 0.65 ft at 3:15AM Jul 31, 2021Observed: 0.65 ft at 3:30AM Jul 31, 2021Observed: 0.65 ft at 3:45AM Jul 31, 2021Observed: 0.64 ft at 4:00AM Jul 31, 2021Observed: 0.64 ft at 4:15AM Jul 31, 2021Observed: 0.64 ft at 4:30AM Jul 31, 2021Observed: 0.64 ft at 4:45AM Jul 31, 2021Observed: 0.64 ft at 5:00AM Jul 31, 2021Observed: 0.63 ft at 5:15AM Jul 31, 2021Observed: 0.63 ft at 5:30AM Jul 31, 2021Observed: 0.63 ft at 5:45AM Jul 31, 2021Observed: 0.63 ft at 6:00AM Jul 31, 2021Observed: 0.63 ft at 6:15AM Jul 31, 2021Observed: 0.63 ft at 6:30AM Jul 31, 2021Observed: 0.63 ft at 6:45AM Jul 31, 2021Observed: 0.63 ft at 7:00AM Jul 31, 2021Observed: 0.63 ft at 7:15AM Jul 31, 2021Observed: 0.62 ft at 7:30AM Jul 31, 2021Observed: 0.62 ft at 7:45AM Jul 31, 2021Observed: 0.57 ft at 8:00AM Jul 31, 2021Observed: 0.67 ft at 8:15AM Jul 31, 2021Observed: 0.61 ft at 8:30AM Jul 31, 2021Observed: 0.61 ft at 8:45AM Jul 31, 2021Observed: 0.62 ft at 9:00AM Jul 31, 2021Observed: 0.62 ft at 9:15AM Jul 31, 2021Observed: 0.61 ft at 9:30AM Jul 31, 2021Observed: 0.66 ft at 9:45AM Jul 31, 2021Observed: 0.5 ft at 10:00AM Jul 31, 2021Observed: 0.68 ft at 10:15AM Jul 31, 2021Observed: 0.66 ft at 10:30AM Jul 31, 2021Observed: 0.51 ft at 10:45AM Jul 31, 2021Observed: 0.72 ft at 11:00AM Jul 31, 2021Observed: 0.64 ft at 11:15AM Jul 31, 2021Observed: 0.62 ft at 11:30AM Jul 31, 2021Observed: 0.64 ft at 11:45AM Jul 31, 2021Observed: 0.56 ft at 12:00PM Jul 31, 2021Observed: 0.66 ft at 12:15PM Jul 31, 2021Observed: 0.62 ft at 12:30PM Jul 31, 2021Observed: 0.55 ft at 12:45PM Jul 31, 2021Observed: 0.52 ft at 1:00PM Jul 31, 2021Observed: 0.74 ft at 1:15PM Jul 31, 2021Observed: 0.59 ft at 1:30PM Jul 31, 2021Observed: 0.53 ft at 1:45PM Jul 31, 2021Observed: 0.59 ft at 2:00PM Jul 31, 2021Observed: 0.66 ft at 2:15PM Jul 31, 2021Observed: 0.53 ft at 2:30PM Jul 31, 2021Observed: 0.7 ft at 2:45PM Jul 31, 2021Observed: 0.67 ft at 3:00PM Jul 31, 2021Observed: 0.55 ft at 3:15PM Jul 31, 2021Observed: 0.54 ft at 3:30PM Jul 31, 2021Observed: 0.68 ft at 3:45PM Jul 31, 2021Observed: 0.57 ft at 4:00PM Jul 31, 2021Observed: 0.55 ft at 4:15PM Jul 31, 2021Observed: 0.6 ft at 4:30PM Jul 31, 2021Observed: 0.53 ft at 4:45PM Jul 31, 2021Observed: 0.63 ft at 5:00PM Jul 31, 2021Observed: 0.65 ft at 5:15PM Jul 31, 2021Observed: 0.55 ft at 5:30PM Jul 31, 2021Observed: 0.71 ft at 5:45PM Jul 31, 2021Observed: 0.6 ft at 6:00PM Jul 31, 2021Observed: 0.54 ft at 6:15PM Jul 31, 2021Observed: 0.65 ft at 6:30PM Jul 31, 2021Observed: 0.59 ft at 6:45PM Jul 31, 2021Observed: 0.64 ft at 7:00PM Jul 31, 2021Observed: 0.58 ft at 7:15PM Jul 31, 2021Observed: 0.69 ft at 7:30PM Jul 31, 2021Observed: 0.64 ft at 7:45PM Jul 31, 2021Observed: 0.54 ft at 8:00PM Jul 31, 2021Observed: 0.72 ft at 8:15PM Jul 31, 2021Observed: 0.59 ft at 8:30PM Jul 31, 2021Observed: 0.48 ft at 8:45PM Jul 31, 2021Observed: 0.62 ft at 9:00PM Jul 31, 2021Observed: 0.68 ft at 9:15PM Jul 31, 2021Observed: 0.69 ft at 9:30PM Jul 31, 2021Observed: 0.68 ft at 9:45PM Jul 31, 2021Observed: 0.61 ft at 10:00PM Jul 31, 2021Observed: 0.59 ft at 10:15PM Jul 31, 2021Observed: 0.67 ft at 10:30PM Jul 31, 2021Observed: 0.74 ft at 10:45PM Jul 31, 2021Observed: 0.51 ft at 11:00PM Jul 31, 2021Observed: 0.63 ft at 11:15PM Jul 31, 2021Observed: 0.62 ft at 11:30PM Jul 31, 2021Observed: 0.58 ft at 11:45PM Jul 31, 2021Observed: 0.57 ft at 12:00AM Aug 01, 2021Observed: 0.64 ft at 12:15AM Aug 01, 2021Observed: 0.58 ft at 12:30AM Aug 01, 2021Observed: 0.59 ft at 12:45AM Aug 01, 2021Observed: 0.6 ft at 1:00AM Aug 01, 2021Observed: 0.59 ft at 1:15AM Aug 01, 2021Observed: 0.59 ft at 1:30AM Aug 01, 2021Observed: 0.59 ft at 1:45AM Aug 01, 2021Observed: 0.59 ft at 2:00AM Aug 01, 2021Observed: 0.58 ft at 2:15AM Aug 01, 2021Observed: 0.58 ft at 2:30AM Aug 01, 2021Observed: 0.58 ft at 2:45AM Aug 01, 2021Observed: 0.58 ft at 3:00AM Aug 01, 2021Observed: 0.57 ft at 3:15AM Aug 01, 2021Observed: 0.57 ft at 3:30AM Aug 01, 2021Observed: 0.57 ft at 3:45AM Aug 01, 2021Observed: 0.58 ft at 4:00AM Aug 01, 2021Observed: 0.58 ft at 4:15AM Aug 01, 2021Observed: 0.57 ft at 4:30AM Aug 01, 2021Observed: 0.58 ft at 4:45AM Aug 01, 2021Observed: 0.57 ft at 5:00AM Aug 01, 2021Observed: 0.57 ft at 5:15AM Aug 01, 2021Observed: 0.57 ft at 5:30AM Aug 01, 2021Observed: 0.57 ft at 5:45AM Aug 01, 2021Observed: 0.57 ft at 6:00AM Aug 01, 2021Observed: 0.57 ft at 6:15AM Aug 01, 2021Observed: 0.57 ft at 6:30AM Aug 01, 2021Observed: 0.57 ft at 6:45AM Aug 01, 2021Observed: 0.57 ft at 7:00AM Aug 01, 2021Observed: 0.56 ft at 7:15AM Aug 01, 2021Observed: 0.56 ft at 7:30AM Aug 01, 2021Observed: 0.56 ft at 7:45AM Aug 01, 2021Observed: 0.55 ft at 8:00AM Aug 01, 2021Observed: 0.54 ft at 8:15AM Aug 01, 2021Observed: 0.57 ft at 8:30AM Aug 01, 2021Observed: 0.52 ft at 8:45AM Aug 01, 2021Observed: 0.59 ft at 9:00AM Aug 01, 2021Observed: 0.55 ft at 9:15AM Aug 01, 2021Observed: 0.44 ft at 9:30AM Aug 01, 2021Observed: 0.57 ft at 9:45AM Aug 01, 2021Observed: 0.6 ft at 10:00AM Aug 01, 2021Observed: 0.51 ft at 10:15AM Aug 01, 2021Observed: 0.56 ft at 10:30AM Aug 01, 2021Observed: 0.61 ft at 10:45AM Aug 01, 2021Observed: 0.49 ft at 11:00AM Aug 01, 2021Observed: 0.62 ft at 11:15AM Aug 01, 2021Observed: 0.55 ft at 11:30AM Aug 01, 2021Observed: 0.58 ft at 11:45AM Aug 01, 2021Observed: 0.51 ft at 12:00PM Aug 01, 2021Observed: 0.67 ft at 12:15PM Aug 01, 2021Observed: 0.56 ft at 12:30PM Aug 01, 2021Observed: 0.58 ft at 12:45PM Aug 01, 2021Observed: 0.56 ft at 1:00PM Aug 01, 2021Observed: 0.59 ft at 1:15PM Aug 01, 2021Observed: 0.52 ft at 1:30PM Aug 01, 2021Observed: 0.58 ft at 1:45PM Aug 01, 2021Observed: 0.6 ft at 2:00PM Aug 01, 2021Observed: 0.61 ft at 2:15PM Aug 01, 2021Observed: 0.59 ft at 2:30PM Aug 01, 2021Observed: 0.63 ft at 2:45PM Aug 01, 2021Observed: 0.55 ft at 3:00PM Aug 01, 2021Observed: 0.63 ft at 3:15PM Aug 01, 2021Observed: 0.57 ft at 3:30PM Aug 01, 2021Observed: 0.58 ft at 3:45PM Aug 01, 2021Observed: 0.57 ft at 4:00PM Aug 01, 2021Observed: 0.5 ft at 4:15PM Aug 01, 2021Observed: 0.6 ft at 4:30PM Aug 01, 2021Observed: 0.55 ft at 4:45PM Aug 01, 2021Observed: 0.55 ft at 5:00PM Aug 01, 2021Observed: 0.6 ft at 5:15PM Aug 01, 2021Observed: 0.7 ft at 5:30PM Aug 01, 2021Observed: 0.61 ft at 5:45PM Aug 01, 2021Observed: 0.63 ft at 6:00PM Aug 01, 2021Observed: 0.82 ft at 6:15PM Aug 01, 2021Observed: 0.63 ft at 6:30PM Aug 01, 2021Observed: 0.56 ft at 6:45PM Aug 01, 2021Observed: 0.75 ft at 7:00PM Aug 01, 2021Observed: 0.67 ft at 7:15PM Aug 01, 2021Observed: 0.67 ft at 7:30PM Aug 01, 2021Observed: 0.6 ft at 7:45PM Aug 01, 2021Observed: 0.61 ft at 8:00PM Aug 01, 2021Observed: 0.7 ft at 8:15PM Aug 01, 2021Observed: 0.58 ft at 8:30PM Aug 01, 2021Observed: 0.57 ft at 8:45PM Aug 01, 2021Observed: 0.65 ft at 9:00PM Aug 01, 2021Observed: 0.6 ft at 9:15PM Aug 01, 2021Observed: 0.6 ft at 9:30PM Aug 01, 2021Observed: 0.62 ft at 9:45PM Aug 01, 2021Observed: 0.6 ft at 10:00PM Aug 01, 2021Observed: 0.6 ft at 10:15PM Aug 01, 2021Observed: 0.6 ft at 10:30PM Aug 01, 2021Observed: 0.66 ft at 10:45PM Aug 01, 2021Observed: 0.56 ft at 11:00PM Aug 01, 2021Observed: 0.61 ft at 11:15PM Aug 01, 2021Observed: 0.61 ft at 11:30PM Aug 01, 2021Observed: 0.59 ft at 11:45PM Aug 01, 2021Observed: 0.6 ft at 12:00AM Aug 02, 2021Observed: 0.6 ft at 12:15AM Aug 02, 2021Observed: 0.59 ft at 12:30AM Aug 02, 2021Observed: 0.59 ft at 12:45AM Aug 02, 2021Observed: 0.59 ft at 1:00AM Aug 02, 2021Observed: 0.58 ft at 1:15AM Aug 02, 2021Observed: 0.58 ft at 1:30AM Aug 02, 2021Observed: 0.59 ft at 1:45AM Aug 02, 2021Observed: 0.59 ft at 2:00AM Aug 02, 2021Observed: 0.59 ft at 2:15AM Aug 02, 2021Observed: 0.58 ft at 2:30AM Aug 02, 2021Observed: 0.58 ft at 2:45AM Aug 02, 2021Observed: 0.58 ft at 3:00AM Aug 02, 2021Observed: 0.58 ft at 3:15AM Aug 02, 2021Observed: 0.58 ft at 3:30AM Aug 02, 2021Observed: 0.58 ft at 3:45AM Aug 02, 2021Observed: 0.58 ft at 4:00AM Aug 02, 2021Observed: 0.58 ft at 4:15AM Aug 02, 2021Observed: 0.58 ft at 4:30AM Aug 02, 2021Observed: 0.58 ft at 4:45AM Aug 02, 2021Observed: 0.57 ft at 5:00AM Aug 02, 2021Observed: 0.57 ft at 5:15AM Aug 02, 2021Observed: 0.57 ft at 5:30AM Aug 02, 2021Observed: 0.57 ft at 5:45AM Aug 02, 2021Observed: 0.57 ft at 6:00AM Aug 02, 2021Observed: 0.57 ft at 6:15AM Aug 02, 2021Observed: 0.57 ft at 6:30AM Aug 02, 2021Observed: 0.57 ft at 6:45AM Aug 02, 2021Observed: 0.57 ft at 7:00AM Aug 02, 2021Observed: 0.56 ft at 7:15AM Aug 02, 2021Observed: 0.56 ft at 7:30AM Aug 02, 2021Observed: 0.56 ft at 7:45AM Aug 02, 2021Observed: 0.56 ft at 8:00AM Aug 02, 2021Observed: 0.56 ft at 8:15AM Aug 02, 2021Observed: 0.56 ft at 8:30AM Aug 02, 2021Observed: 0.58 ft at 8:45AM Aug 02, 2021Observed: 0.66 ft at 9:00AM Aug 02, 2021Observed: 0.52 ft at 9:15AM Aug 02, 2021Observed: 0.55 ft at 9:30AM Aug 02, 2021Observed: 0.54 ft at 9:45AM Aug 02, 2021Observed: 0.64 ft at 10:00AM Aug 02, 2021Observed: 0.4 ft at 10:15AM Aug 02, 2021Observed: 0.6 ft at 10:30AM Aug 02, 2021Observed: 0.56 ft at 10:45AM Aug 02, 2021Observed: 0.58 ft at 11:00AM Aug 02, 2021Observed: 0.52 ft at 11:15AM Aug 02, 2021Observed: 0.66 ft at 11:30AM Aug 02, 2021Observed: 0.53 ft at 11:45AM Aug 02, 2021Observed: 0.6 ft at 12:00PM Aug 02, 2021Observed: 0.51 ft at 12:15PM Aug 02, 2021Observed: 0.54 ft at 12:30PM Aug 02, 2021Observed: 0.65 ft at 12:45PM Aug 02, 2021Observed: 0.46 ft at 1:00PM Aug 02, 2021Observed: 0.61 ft at 1:15PM Aug 02, 2021Observed: 0.59 ft at 1:30PM Aug 02, 2021Observed: 0.51 ft at 1:45PM Aug 02, 2021Observed: 0.57 ft at 2:00PM Aug 02, 2021Observed: 0.62 ft at 2:15PM Aug 02, 2021Observed: 0.52 ft at 2:30PM Aug 02, 2021Observed: 0.6 ft at 2:45PM Aug 02, 2021Observed: 0.52 ft at 3:00PM Aug 02, 2021Observed: 0.63 ft at 3:15PM Aug 02, 2021Observed: 0.69 ft at 3:30PM Aug 02, 2021Observed: 0.61 ft at 3:45PM Aug 02, 2021Observed: 0.59 ft at 4:00PM Aug 02, 2021Observed: 0.6 ft at 4:15PM Aug 02, 2021Observed: 0.83 ft at 4:30PM Aug 02, 2021Observed: 0.56 ft at 4:45PM Aug 02, 2021Observed: 0.54 ft at 5:00PM Aug 02, 2021Observed: 0.66 ft at 5:15PM Aug 02, 2021Observed: 0.61 ft at 5:30PM Aug 02, 2021Observed: 0.6 ft at 5:45PM Aug 02, 2021Observed: 0.55 ft at 6:00PM Aug 02, 2021Observed: 0.59 ft at 6:15PM Aug 02, 2021Observed: 0.62 ft at 6:30PM Aug 02, 2021Observed: 0.52 ft at 6:45PM Aug 02, 2021Observed: 0.58 ft at 7:00PM Aug 02, 2021Observed: 0.57 ft at 7:15PM Aug 02, 2021Observed: 0.5 ft at 7:30PM Aug 02, 2021Observed: 0.54 ft at 7:45PM Aug 02, 2021Observed: 0.59 ft at 8:00PM Aug 02, 2021Observed: 0.66 ft at 8:15PM Aug 02, 2021Observed: 0.63 ft at 8:30PM Aug 02, 2021Observed: 0.55 ft at 8:45PM Aug 02, 2021Observed: 0.47 ft at 9:00PM Aug 02, 2021Observed: 0.62 ft at 9:15PM Aug 02, 2021Observed: 0.66 ft at 9:30PM Aug 02, 2021Observed: 0.54 ft at 9:45PM Aug 02, 2021Observed: 0.58 ft at 10:00PM Aug 02, 2021Observed: 0.58 ft at 10:15PM Aug 02, 2021Observed: 0.56 ft at 10:30PM Aug 02, 2021Observed: 0.48 ft at 10:45PM Aug 02, 2021Observed: 0.56 ft at 11:00PM Aug 02, 2021Observed: 0.58 ft at 11:15PM Aug 02, 2021Observed: 0.55 ft at 11:30PM Aug 02, 2021Observed: 0.55 ft at 11:45PM Aug 02, 2021Observed: 0.57 ft at 12:00AM Aug 03, 2021Observed: 0.55 ft at 12:15AM Aug 03, 2021Observed: 0.56 ft at 12:30AM Aug 03, 2021Observed: 0.56 ft at 12:45AM Aug 03, 2021Observed: 0.56 ft at 1:00AM Aug 03, 2021Observed: 0.56 ft at 1:15AM Aug 03, 2021Observed: 0.56 ft at 1:30AM Aug 03, 2021Observed: 0.56 ft at 1:45AM Aug 03, 2021Observed: 0.56 ft at 2:00AM Aug 03, 2021Observed: 0.56 ft at 2:15AM Aug 03, 2021Observed: 0.56 ft at 2:30AM Aug 03, 2021Observed: 0.55 ft at 2:45AM Aug 03, 2021Observed: 0.55 ft at 3:00AM Aug 03, 2021Observed: 0.55 ft at 3:15AM Aug 03, 2021Observed: 0.55 ft at 3:30AM Aug 03, 2021Observed: 0.55 ft at 3:45AM Aug 03, 2021Observed: 0.55 ft at 4:00AM Aug 03, 2021Observed: 0.55 ft at 4:15AM Aug 03, 2021Observed: 0.55 ft at 4:30AM Aug 03, 2021Observed: 0.55 ft at 4:45AM Aug 03, 2021Observed: 0.55 ft at 5:00AM Aug 03, 2021Observed: 0.55 ft at 5:15AM Aug 03, 2021Observed: 0.55 ft at 5:30AM Aug 03, 2021Observed: 0.55 ft at 5:45AM Aug 03, 2021Observed: 0.55 ft at 6:00AM Aug 03, 2021Observed: 0.55 ft at 6:15AM Aug 03, 2021Observed: 0.55 ft at 6:30AM Aug 03, 2021Observed: 0.55 ft at 6:45AM Aug 03, 2021Observed: 0.55 ft at 7:00AM Aug 03, 2021Observed: 0.54 ft at 7:15AM Aug 03, 2021Observed: 0.55 ft at 7:30AM Aug 03, 2021Observed: 0.54 ft at 7:45AM Aug 03, 2021Observed: 0.54 ft at 8:00AM Aug 03, 2021Observed: 0.54 ft at 8:15AM Aug 03, 2021Observed: 0.54 ft at 8:30AM Aug 03, 2021Observed: 0.46 ft at 8:45AM Aug 03, 2021Observed: 0.59 ft at 9:00AM Aug 03, 2021Observed: 0.53 ft at 9:15AM Aug 03, 2021Observed: 0.52 ft at 9:30AM Aug 03, 2021Observed: 0.53 ft at 9:45AM Aug 03, 2021Observed: 0.46 ft at 10:00AM Aug 03, 2021Observed: 0.51 ft at 10:15AM Aug 03, 2021Observed: 0.45 ft at 10:30AM Aug 03, 2021Observed: 0.56 ft at 10:45AM Aug 03, 2021Observed: 0.5 ft at 11:00AM Aug 03, 2021Observed: 0.52 ft at 11:15AM Aug 03, 2021Observed: 0.51 ft at 11:30AM Aug 03, 2021Observed: 0.59 ft at 11:45AM Aug 03, 2021Observed: 0.54 ft at 12:00PM Aug 03, 2021Observed: 0.5 ft at 12:15PM Aug 03, 2021Observed: 0.46 ft at 12:30PM Aug 03, 2021Observed: 0.56 ft at 12:45PM Aug 03, 2021Observed: 0.53 ft at 1:00PM Aug 03, 2021Observed: 0.51 ft at 1:15PM Aug 03, 2021Observed: 0.59 ft at 1:30PM Aug 03, 2021Observed: 0.49 ft at 1:45PM Aug 03, 2021Observed: 0.58 ft at 2:00PM Aug 03, 2021Observed: 0.64 ft at 2:15PM Aug 03, 2021Observed: 0.55 ft at 2:30PM Aug 03, 2021Observed: 0.44 ft at 2:45PM Aug 03, 2021Observed: 0.53 ft at 3:00PM Aug 03, 2021Observed: 0.59 ft at 3:15PM Aug 03, 2021Observed: 0.54 ft at 3:30PM Aug 03, 2021Observed: 0.5 ft at 3:45PM Aug 03, 2021Observed: 0.5 ft at 4:00PM Aug 03, 2021Observed: 0.61 ft at 4:15PM Aug 03, 2021Observed: 0.56 ft at 4:30PM Aug 03, 2021Observed: 0.67 ft at 4:45PM Aug 03, 2021Observed: 0.7 ft at 5:00PM Aug 03, 2021Observed: 0.5 ft at 5:15PM Aug 03, 2021Observed: 0.58 ft at 5:30PM Aug 03, 2021Observed: 0.57 ft at 5:45PM Aug 03, 2021Observed: 0.55 ft at 6:00PM Aug 03, 2021Observed: 0.64 ft at 6:15PM Aug 03, 2021Observed: 0.48 ft at 6:30PM Aug 03, 2021Observed: 0.45 ft at 6:45PM Aug 03, 2021Observed: 0.67 ft at 7:00PM Aug 03, 2021Observed: 0.59 ft at 7:15PM Aug 03, 2021Observed: 0.53 ft at 7:30PM Aug 03, 2021Observed: 0.58 ft at 7:45PM Aug 03, 2021Observed: 0.57 ft at 8:00PM Aug 03, 2021Observed: 0.69 ft at 8:15PM Aug 03, 2021Observed: 0.66 ft at 8:30PM Aug 03, 2021Observed: 0.52 ft at 8:45PM Aug 03, 2021Observed: 0.58 ft at 9:00PM Aug 03, 2021Observed: 0.57 ft at 9:15PM Aug 03, 2021Observed: 0.62 ft at 9:30PM Aug 03, 2021Observed: 0.56 ft at 9:45PM Aug 03, 2021Observed: 0.56 ft at 10:00PM Aug 03, 2021Observed: 0.57 ft at 10:15PM Aug 03, 2021Observed: 0.57 ft at 10:30PM Aug 03, 2021Observed: 0.56 ft at 10:45PM Aug 03, 2021Observed: 0.57 ft at 11:00PM Aug 03, 2021Observed: 0.56 ft at 11:15PM Aug 03, 2021Observed: 0.56 ft at 11:30PM Aug 03, 2021Observed: 0.56 ft at 11:45PM Aug 03, 2021Observed: 0.56 ft at 12:00AM Aug 04, 2021Observed: 0.55 ft at 12:15AM Aug 04, 2021Observed: 0.55 ft at 12:30AM Aug 04, 2021Observed: 0.55 ft at 12:45AM Aug 04, 2021Observed: 0.55 ft at 1:00AM Aug 04, 2021Observed: 0.55 ft at 1:15AM Aug 04, 2021Observed: 0.55 ft at 1:30AM Aug 04, 2021Observed: 0.55 ft at 1:45AM Aug 04, 2021Observed: 0.55 ft at 2:00AM Aug 04, 2021Observed: 0.55 ft at 2:15AM Aug 04, 2021Observed: 0.55 ft at 2:30AM Aug 04, 2021Observed: 0.55 ft at 2:45AM Aug 04, 2021Observed: 0.55 ft at 3:00AM Aug 04, 2021Observed: 0.55 ft at 3:15AM Aug 04, 2021Observed: 0.55 ft at 3:30AM Aug 04, 2021Observed: 0.55 ft at 3:45AM Aug 04, 2021Observed: 0.55 ft at 4:00AM Aug 04, 2021Observed: 0.55 ft at 4:15AM Aug 04, 2021Observed: 0.54 ft at 4:30AM Aug 04, 2021Observed: 0.54 ft at 4:45AM Aug 04, 2021Observed: 0.54 ft at 5:00AM Aug 04, 2021Observed: 0.54 ft at 5:15AM Aug 04, 2021Observed: 0.54 ft at 5:30AM Aug 04, 2021Observed: 0.54 ft at 5:45AM Aug 04, 2021Observed: 0.54 ft at 6:00AM Aug 04, 2021Observed: 0.54 ft at 6:15AM Aug 04, 2021Observed: 0.54 ft at 6:30AM Aug 04, 2021Observed: 0.54 ft at 6:45AM Aug 04, 2021Observed: 0.54 ft at 7:00AM Aug 04, 2021Observed: 0.53 ft at 7:15AM Aug 04, 2021Observed: 0.54 ft at 7:30AM Aug 04, 2021Observed: 0.53 ft at 7:45AM Aug 04, 2021Observed: 0.53 ft at 8:00AM Aug 04, 2021Observed: 0.6 ft at 8:15AM Aug 04, 2021Observed: 0.51 ft at 8:30AM Aug 04, 2021Observed: 0.53 ft at 8:45AM Aug 04, 2021Observed: 0.53 ft at 9:00AM Aug 04, 2021Observed: 0.52 ft at 9:15AM Aug 04, 2021Observed: 0.52 ft at 9:30AM Aug 04, 2021Observed: 0.52 ft at 9:45AM Aug 04, 2021Observed: 0.51 ft at 10:00AM Aug 04, 2021Observed: 0.55 ft at 10:15AM Aug 04, 2021Observed: 0.5 ft at 10:30AM Aug 04, 2021Observed: 0.62 ft at 10:45AM Aug 04, 2021Observed: 0.54 ft at 11:00AM Aug 04, 2021Observed: 0.51 ft at 11:15AM Aug 04, 2021Observed: 0.66 ft at 11:30AM Aug 04, 2021Observed: 0.49 ft at 11:45AM Aug 04, 2021Observed: 0.6 ft at 12:00PM Aug 04, 2021Observed: 0.55 ft at 12:15PM Aug 04, 2021Observed: 0.48 ft at 12:30PM Aug 04, 2021Observed: 0.72 ft at 12:45PM Aug 04, 2021Observed: 0.49 ft at 1:00PM Aug 04, 2021Observed: 0.62 ft at 1:15PM Aug 04, 2021Observed: 0.57 ft at 1:30PM Aug 04, 2021Observed: 0.41 ft at 1:45PM Aug 04, 2021Observed: 0.68 ft at 2:00PM Aug 04, 2021Observed: 0.57 ft at 2:15PM Aug 04, 2021Observed: 0.47 ft at 2:30PM Aug 04, 2021Observed: 0.45 ft at 2:45PM Aug 04, 2021Observed: 0.63 ft at 3:00PM Aug 04, 2021Observed: 0.46 ft at 3:15PM Aug 04, 2021Observed: 0.49 ft at 3:30PM Aug 04, 2021Observed: 0.63 ft at 3:45PM Aug 04, 2021Observed: 0.5 ft at 4:00PM Aug 04, 2021Observed: 0.61 ft at 4:15PM Aug 04, 2021Observed: 0.52 ft at 4:30PM Aug 04, 2021Observed: 0.6 ft at 4:45PM Aug 04, 2021Observed: 0.49 ft at 5:00PM Aug 04, 2021Observed: 0.49 ft at 5:15PM Aug 04, 2021Observed: 0.63 ft at 5:30PM Aug 04, 2021Observed: 0.53 ft at 5:45PM Aug 04, 2021Observed: 0.47 ft at 6:00PM Aug 04, 2021Observed: 0.57 ft at 6:15PM Aug 04, 2021Observed: 0.65 ft at 6:30PM Aug 04, 2021Observed: 0.68 ft at 6:45PM Aug 04, 2021Observed: 0.48 ft at 7:00PM Aug 04, 2021Observed: 0.47 ft at 7:15PM Aug 04, 2021Observed: 0.58 ft at 7:30PM Aug 04, 2021Observed: 0.69 ft at 7:45PM Aug 04, 2021Observed: 0.5 ft at 8:00PM Aug 04, 2021Observed: 0.54 ft at 8:15PM Aug 04, 2021Observed: 0.55 ft at 8:30PM Aug 04, 2021Observed: 0.57 ft at 8:45PM Aug 04, 2021Observed: 0.45 ft at 9:00PM Aug 04, 2021Observed: 0.53 ft at 9:15PM Aug 04, 2021Observed: 0.55 ft at 9:30PM Aug 04, 2021Observed: 0.52 ft at 9:45PM Aug 04, 2021Observed: 0.52 ft at 10:00PM Aug 04, 2021Observed: 0.54 ft at 10:15PM Aug 04, 2021Observed: 0.52 ft at 10:30PM Aug 04, 2021Observed: 0.53 ft at 10:45PM Aug 04, 2021Observed: 0.52 ft at 11:00PM Aug 04, 2021Observed: 0.53 ft at 11:15PM Aug 04, 2021Observed: 0.53 ft at 11:30PM Aug 04, 2021Observed: 0.52 ft at 11:45PM Aug 04, 2021Observed: 0.52 ft at 12:00AM Aug 05, 2021Observed: 0.52 ft at 12:15AM Aug 05, 2021Observed: 0.52 ft at 12:30AM Aug 05, 2021Observed: 0.52 ft at 12:45AM Aug 05, 2021Observed: 0.52 ft at 1:00AM Aug 05, 2021Observed: 0.52 ft at 1:15AM Aug 05, 2021Observed: 0.52 ft at 1:30AM Aug 05, 2021Observed: 0.52 ft at 1:45AM Aug 05, 2021Observed: 0.52 ft at 2:00AM Aug 05, 2021Observed: 0.52 ft at 2:15AM Aug 05, 2021Observed: 0.52 ft at 2:30AM Aug 05, 2021Observed: 0.52 ft at 2:45AM Aug 05, 2021Observed: 0.52 ft at 3:00AM Aug 05, 2021Observed: 0.52 ft at 3:15AM Aug 05, 2021Observed: 0.51 ft at 3:30AM Aug 05, 2021Observed: 0.52 ft at 3:45AM Aug 05, 2021Observed: 0.51 ft at 4:00AM Aug 05, 2021Observed: 0.51 ft at 4:15AM Aug 05, 2021Observed: 0.51 ft at 4:30AM Aug 05, 2021Observed: 0.51 ft at 4:45AM Aug 05, 2021Observed: 0.51 ft at 5:00AM Aug 05, 2021Observed: 0.51 ft at 5:15AM Aug 05, 2021Observed: 0.51 ft at 5:30AM Aug 05, 2021Observed: 0.51 ft at 5:45AM Aug 05, 2021Observed: 0.51 ft at 6:00AM Aug 05, 2021Observed: 0.51 ft at 6:15AM Aug 05, 2021Observed: 0.51 ft at 6:30AM Aug 05, 2021Observed: 0.51 ft at 6:45AM Aug 05, 2021Observed: 0.51 ft at 7:00AM Aug 05, 2021Observed: 0.51 ft at 7:15AM Aug 05, 2021Observed: 0.51 ft at 7:30AM Aug 05, 2021Observed: 0.65 ft at 7:45AM Aug 05, 2021Observed: 0.47 ft at 8:00AM Aug 05, 2021Observed: 0.52 ft at 8:15AM Aug 05, 2021Observed: 0.52 ft at 8:30AM Aug 05, 2021Observed: 0.52 ft at 8:45AM Aug 05, 2021Observed: 0.52 ft at 9:00AM Aug 05, 2021Observed: 0.54 ft at 9:15AM Aug 05, 2021Observed: 0.53 ft at 9:30AM Aug 05, 2021Observed: 0.54 ft at 9:45AM Aug 05, 2021Observed: 0.61 ft at 10:00AM Aug 05, 2021Observed: 0.46 ft at 10:15AM Aug 05, 2021Observed: 0.58 ft at 10:30AM Aug 05, 2021Observed: 0.59 ft at 10:45AM Aug 05, 2021Observed: 0.59 ft at 11:00AM Aug 05, 2021Observed: 0.5 ft at 11:15AM Aug 05, 2021Observed: 0.57 ft at 11:30AM Aug 05, 2021Observed: 0.61 ft at 11:45AM Aug 05, 2021Observed: 0.46 ft at 12:00PM Aug 05, 2021Observed: 0.64 ft at 12:15PM Aug 05, 2021USGS--Water Resources of the United StatesMHYI2(plotting HTIRG) Graph Created (1:41PM Aug 5, 2021)ObservedLatest observed value: 0.64 ft at 12:15 PM CDT 5-Aug-2021. Flood Stage is 4 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts are not available for the Fox River at McHenry (Stratton Lock and Dam) tailwater. Only observed stages are available for this point.
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Upstream Gauge - near Johnsburg Upstream Gauge Downstream Gauge Downstream Gauge - at Algonquin
Flood Categories (in feet)
Major Flood Stage: 7
Moderate Flood Stage: 6
Flood Stage: 4
Action Stage: 3
Low Stage (in feet): 0.5

Historic Crests
(1) 7.65 ft on 07/22/2017
(2) 7.64 ft on 04/23/2013
(3) 7.20 ft on 10/02/1986
(4) 7.04 ft on 04/02/1979
(5) 6.95 ft on 08/27/2007
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 6.20 ft on 05/23/2020
(2) 5.49 ft on 05/04/2020
(3) 5.93 ft on 10/08/2019
(4) 6.43 ft on 09/17/2019
(5) 4.93 ft on 06/01/2019
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -0.01 ft on 10/06/2012

For more information on your flood risk go to www.floodsmart.gov.

Zoom Level:15
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Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
12 McHenry Waste Water Treatment Plant property is threatened. Miller Road is threatened west of the river in McHenry.
11 Multiple structures along the river are threatened in downtown McHenry. River Road is threatened at IL-120 (Elm Street) in McHenry.
10.5 IL-176 is threatened near Holiday Hills.
9 Country Club Drive, Emerald Drive, and River Road near Chapel Hill Road are threatened in McHenry.
8.5 Residences threatened along Country Club Drive and Emerald Drive in McHenry. Roadways threatened at Miller Riverfront Park in McHenry.
8 Residences along River Road are threatened near Mary Lane in McHenry. Backwater causes Boone Creek to threaten parking lots in downtown McHenry. Numerous marinas are threatened in McHenry.
7 Low-lying sections of Miller Riverfront Park inundated in McHenry.
6 Backwater causes Boone Creek to inundate sections of the McHenry river walk.
5.5 Water reaches bankfull along Country Club Drive and Emerald Drive in McHenry.
5 Roadways and structures may be threatened in Frisch's Riverside subdivision along Lagoon and River Shore Drives.
4.5 Roadways and structures may be threatened in the Holiday Hills subdivison along Holiday Drive.
3.5 Boathouses threatened along the river downstream of the dam.
3 Fox Waterway Agency considers "no wake" order for the Fox River from Algonquin Dam to Stratton Dam.
Low Water Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
0.0 River nears zero flow.
0.5 Approximate stage of the 1-in-10 annual chance flow (7-day average).
1.0 Low water levels begin to impact operations at Stratton and Algonquin Dams.
About This Location Collapse

Latitude: 42.309167° N, Longitude: 88.251389° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 4 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
Elevation
(gauge height = flood stage)
Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:

Additional Information Collapse
Illinois DNR Office of Water Resources: Stratton Operations Update
Resources Collapse
Hydrologic Resources Additional Resources
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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Page last modified: 2-Nov-2020 7:29 PM
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