How high is the Monocacy River at Jug Bridge Near Frederick, MD right now?

The Monocacy River at Jug Bridge Near Frederick, MD is currently flowing at 917 cubic feet per second with a gage height of 3.25 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Monocacy River at Jug Bridge Near Frederick, MD normal for this time of year?

Current flow is classified as high for October 28. Today's discharge is at the 78th percentile compared to the long-term historical record at this gauge.

Is the Monocacy River at Jug Bridge Near Frederick, MD at flood stage?

No — the gage height is 11.75 feet below the NWS flood-stage threshold of 15.0 feet.

What is the historical median flow for the Monocacy River at Jug Bridge Near Frederick, MD on October 28?

The long-term median discharge for this date is 259 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 100 to 2,900 cfs.

Where is the Monocacy River at Jug Bridge Near Frederick, MD stream gauge located?

The Monocacy River at Jug Bridge Near Frederick, MD stream gauge is operated by the USGS in Frederick County, MD on the Monocacy River. USGS site number 01643000 (coordinates 39.4028, -77.3661).

Monocacy River at Jug Bridge Near Frederick, MD

USGS Site No: 01643000 • Monocacy River • Frederick County, MD

Monocacy River at Jug Bridge Near Frederick, MD on the Monocacy River is currently at 917 cfs (High — 78th percentile for this date) . Gage height: 3.25 ft.

Reading from 4 months ago

↑ Upstream on Monocacy River

Monocacy River at Monocacy Blvd at Frederick, MD

Downstream on Monocacy River ↓

Monocacy River Near Dickerson, MD

917

CFS Discharge

3.25

Gage Height (ft)

High

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 28 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	100
25th	Low threshold	154
50th (Median)	Normal (median)	259
75th	High threshold	549
95th	Very High threshold	2,900	Today: 917 cfs

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.

10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date	Discharge (CFS)	Gage Ht (ft)
May 28, 2026	1,460	—
May 27, 2026	1,550	—
May 26, 2026	1,970	—
May 25, 2026	3,010	—
May 24, 2026	4,930	—
May 23, 2026	2,710	—
May 22, 2026	867	—
May 21, 2026	351	—
May 20, 2026	210	—
May 19, 2026	186	—
May 18, 2026	201	—
May 17, 2026	214	—
May 16, 2026	234	—
May 15, 2026	242	—
Apr 21, 2026	418	—
Apr 20, 2026	424	—
Apr 19, 2026	393	—
Apr 18, 2026	381	—
Apr 17, 2026	430	—
Apr 16, 2026	517	—
Apr 15, 2026	464	—
Apr 14, 2026	438	—
Apr 13, 2026	456	—
Apr 12, 2026	473	—
Apr 11, 2026	512	—
Apr 10, 2026	544	—
Apr 9, 2026	578	—
Apr 8, 2026	657	—
Apr 7, 2026	855	—
Apr 6, 2026	1,080	—

Station Information

USGS Site No: 01643000
State: MD
County: Frederick County
Coordinates: 39.4028, -77.3661
Drainage Area: 817 mi²
Datum (ft): 231.1
HUC Code: 02070009

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 13.0 ft
Flood Stage: 15.0 ft
Moderate Flood: 17.0 ft
Major Flood: 20.0 ft

Currently 11.75 ft below flood stage.

Recent Extremes

Max discharge: 9,680 cfs

May 14, 2025
Min discharge: 86 cfs

Sep 15, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Potomac River at Point Of Rocks, MD
13.0 mi · 34,600 cfs

Very High
Cattail Creek Near Glenwood, MD
19.7 mi · 17 cfs

Normal
Patuxent River Near Unity, MD
20.1 mi · 24 cfs

Normal
Morgan Run Near Louisville, MD
22.2 mi · 22 cfs

Normal
Patuxent River Below Brighton Dam Near Brighton MD
24.2 mi · 12 cfs

Very Low