How high is the Monocacy River at Monocacy Blvd at Frederick, MD right now?

The Monocacy River at Monocacy Blvd at Frederick, MD is currently flowing at 788 cubic feet per second with a gage height of 3.13 feet, based on the most recent USGS instantaneous reading.

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

Current flow is classified as high for October 27. Today's discharge is at the 78th percentile compared to the long-term historical record at this gauge.

Is the Monocacy River at Monocacy Blvd at Frederick, MD at flood stage?

No — the gage height is 14.67 feet below the NWS flood-stage threshold of 17.8 feet.

What is the historical median flow for the Monocacy River at Monocacy Blvd at Frederick, MD on October 27?

The long-term median discharge for this date is 255 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 78 to 1,550 cfs.

Where is the Monocacy River at Monocacy Blvd at Frederick, MD stream gauge located?

The Monocacy River at Monocacy Blvd at Frederick, MD stream gauge is operated by the USGS in Frederick County, MD on the Monocacy River. USGS site number 01642190 (coordinates 39.4436, -77.3823).

Monocacy River at Monocacy Blvd at Frederick, MD

USGS Site No: 01642190 • Monocacy River • Frederick County, MD

Monocacy River at Monocacy Blvd at Frederick, MD on the Monocacy River is currently at 788 cfs (High — 78th percentile for this date) . Gage height: 3.13 ft.

Reading from 4 months ago

↑ Upstream on Monocacy River

Monocacy River at Bridgeport, MD

Downstream on Monocacy River ↓

Monocacy River at Jug Bridge Near Frederick, MD

788

CFS Discharge

3.13

Gage Height (ft)

High

Flow Condition

Normal

Flood Status

Historical Percentile Comparison

Today's discharge compared to the long-term record for October 27 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	78
25th	Low threshold	125
50th (Median)	Normal (median)	255
75th	High threshold	678
95th	Very High threshold	1,550	Today: 788 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	1,210	—
May 27, 2026	1,250	—
May 26, 2026	1,630	—
May 25, 2026	2,430	—
May 24, 2026	4,040	—
May 23, 2026	2,240	—
May 22, 2026	741	—
May 21, 2026	323	—
May 20, 2026	151	—
May 19, 2026	156	—
May 18, 2026	165	—
May 17, 2026	176	—
May 16, 2026	191	—
May 15, 2026	196	—
Apr 21, 2026	353	—
Apr 20, 2026	370	—
Apr 19, 2026	319	—
Apr 18, 2026	320	—
Apr 17, 2026	364	—
Apr 16, 2026	448	—
Apr 15, 2026	393	—
Apr 14, 2026	366	—
Apr 13, 2026	378	—
Apr 12, 2026	402	—
Apr 11, 2026	435	—
Apr 10, 2026	461	—
Apr 9, 2026	493	—
Apr 8, 2026	561	—
Apr 7, 2026	718	—
Apr 6, 2026	936	—

Station Information

USGS Site No: 01642190
State: MD
County: Frederick County
Coordinates: 39.4436, -77.3823
Drainage Area: 703 mi²
Datum (ft): 240.2
HUC Code: 020700090606

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 15.5 ft
Flood Stage: 17.8 ft
Moderate Flood: 20.2 ft
Major Flood: 23.5 ft

Currently 14.67 ft below flood stage.

Recent Extremes

Max discharge: 8,670 cfs

May 14, 2025
Min discharge: 48 cfs

Sep 16, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

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

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

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

High
Morgan Run Near Louisville, MD
22.8 mi · 22 cfs

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Cranberry Branch Near Westminster, MD
24.4 mi · 1 cfs

Low