Casey Fork at Mount Vernon, IL

USGS Site No: 05595820 • Casey Fork • Jefferson County, IL

Casey Fork at Mount Vernon, IL on the Casey Fork is currently at 9 cfs (Normal — 42th percentile for this date) . Gage height: 1.94 ft.

Reading from

9
CFS Discharge
1.94
Gage Height (ft)
Normal
Flow Condition
N/A
Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.

Percentile Label CFS Threshold Today's Flow
10th Very Low threshold 3
25th Low threshold 5
50th (Median) Normal (median) 11 Today: 9 cfs
75th High threshold 34
95th Very High threshold 317

30-Day Hydrograph

Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.

7.3k 3.6k 0 cfs Apr 5 May 28
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 28, 2026 12 2.08
May 27, 2026 11 2.04
May 26, 2026 12 2.09
May 25, 2026 14 2.19
May 24, 2026 17 2.28
May 23, 2026 20 2.38
May 22, 2026 24 2.50
May 21, 2026 39 2.84
May 20, 2026 129 3.91
May 19, 2026 847 9.55
May 18, 2026 154 4.01
May 17, 2026 352 5.94
May 16, 2026 25 2.15
May 15, 2026 10 1.98
Apr 20, 2026 22 2.45
Apr 19, 2026 56 3.05
Apr 18, 2026 44 2.80
Apr 17, 2026 25 2.52
Apr 16, 2026 21 2.41
Apr 15, 2026 11 2.03
Apr 14, 2026 10 1.99
Apr 13, 2026 11 2.03
Apr 12, 2026 12 2.07
Apr 11, 2026 13 2.15
Apr 10, 2026 16 2.25
Apr 9, 2026 18 2.33
Apr 8, 2026 21 2.43
Apr 7, 2026 29 2.62
Apr 6, 2026 50 3.03
Apr 5, 2026 165 4.30

Station Information

USGS Site No
05595820
State
IL
County
Jefferson County
Coordinates
38.2867, -88.8722
Drainage Area
77 mi²
Datum (ft)
419.6
HUC Code
07140106
View on USGS NWIS →

Recent Extremes

Max discharge
1,300 cfs
Jun 7, 2025
Min discharge
1 cfs
Jan 20, 2026

Computed from the local daily-values archive.

Nearby Gauges

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