Frost Advisory
2026-10-17T09:00:00-05:00

* WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of north central, northwest, and west central Illinois, southeast Iowa, and northeast Missouri. * WHEN...From 1 AM to 9 AM CDT Saturday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Realtime Data

Illinois

Green River

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Frost Advisory
Until 2026-10-16T16:00:00-05:00 • National Weather Service
* WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of north central, northwest, and west central Illinois, southeast Iowa, and northeast Missouri. * WHEN...From 1 AM to 9 AM CDT Saturday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

GREEN RIVER NEAR GENESEO, IL

Realtime Data • Report • Conditions

945

Discharge (cfs)

4.7

Gauge Height (ft)

USGS 05447500

Streamflow discharge was last observed at 945 cfs, and a gauge height of 4.74 feet. With the % decrease since yesterday, the streamflow average over the past 10 days is 1,175 .

Weather today, Tomorrow,

The river has several tributaries, such as the Hooppole Creek and the Hennepin Canal, and is affected by seasonal trends, with higher flows in the spring and lower flows in the summer. The river also has several small dams, which can affect its flow and water quality. Interestingly, the Green River is known for its diverse fish population, including several species of bass, catfish, and trout, making it a popular spot for anglers.

October 16, 2026

Elevation	586.0 ft
Last Updated
Gage height, ft	4.74 ft
Nitrate plus nitrite, water, in situ, mg/L as N	4.0 mg/l as N
Nitrate plus nitrite, water, unfiltered, pounds of nitrogen per day	77900.0 lb/d as N
Streamflow, ft³/s	945.0 ft3/s
Specific conductance, water, unfiltered, microsiemens per centimeter at 25°C	678.0 uS/cm @25C
Orthophosphate, water, in situ, milligrams per liter as phosphorus	0.042 mg/l as P
Dissolved oxygen, water, unfiltered, mg/L	7.9 mg/l
Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 ±2.5°, formazin nephelometric units (FNU)	187.0 FNU
pH, water, unfiltered, field, standard units	7.8 std units
Temperature, water, degC	14.3 deg C
Percent of Normal	227%
Year Over Year Average	415 cfs
24hr Flow Prediction	cfs
Maximum Recorded	10,800 cfs

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Green River Near Geneseo, Il Realtime Data

GREEN RIVER NEAR GENESEO, IL

Realtime Data • Report • Conditions

945

Discharge (cfs)

4.7

Gauge Height (ft)

October 16, 2026

Seasonal Comparison

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Green River Near Geneseo, Il Realtime Data

GREEN RIVER NEAR GENESEO, IL

Realtime Data • Report • Conditions

945

Discharge (cfs)

4.7

Gauge Height (ft)

October 16, 2026

Seasonal Comparison

Oceanic Nino Index

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