How high is the Northeast Branch Anacostia River at Riverdale, MD right now?

The Northeast Branch Anacostia River at Riverdale, MD is currently flowing at 30 cubic feet per second with a gage height of 0.55 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Northeast Branch Anacostia River at Riverdale, MD normal for this time of year?

Current flow is classified as normal for June 11. Today's discharge is at the 41th percentile compared to the long-term historical record at this gauge.

Is the Northeast Branch Anacostia River at Riverdale, MD at flood stage?

No — the gage height is 7.45 feet below the NWS flood-stage threshold of 8.0 feet.

What is the historical median flow for the Northeast Branch Anacostia River at Riverdale, MD on June 11?

The long-term median discharge for this date is 34 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 16 to 498 cfs.

Where is the Northeast Branch Anacostia River at Riverdale, MD stream gauge located?

The Northeast Branch Anacostia River at Riverdale, MD stream gauge is operated by the USGS in Prince George's County, MD on the Northeast Branch Anacostia River. USGS site number 01649500 (coordinates 38.9603, -76.9260).

Northeast Branch Anacostia River at Riverdale, MD

USGS Site No: 01649500 • Northeast Branch Anacostia River • Prince George's County, MD

Northeast Branch Anacostia River at Riverdale, MD on the Northeast Branch Anacostia River is currently at 30 cfs (Normal — 41th percentile for this date) . Gage height: 0.55 ft.

Reading from 1 week ago

CFS Discharge

0.55

Gage Height (ft)

Normal

Flow Condition

Normal

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	16
25th	Low threshold	22
50th (Median)	Normal (median)	34	Today: 30 cfs
75th	High threshold	53
95th	Very High threshold	498

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	46	—
May 27, 2026	58	—
May 26, 2026	79	—
May 25, 2026	121	—
May 24, 2026	554	—
May 23, 2026	244	—
May 22, 2026	99	—
May 21, 2026	132	—
May 20, 2026	22	—
May 19, 2026	18	—
May 18, 2026	19	—
May 17, 2026	20	—
May 16, 2026	22	—
May 15, 2026	34	—
Apr 21, 2026	19	—
Apr 20, 2026	21	—
Apr 19, 2026	22	—
Apr 18, 2026	19	—
Apr 17, 2026	20	—
Apr 16, 2026	22	—
Apr 15, 2026	23	—
Apr 14, 2026	23	—
Apr 13, 2026	24	—
Apr 12, 2026	24	—
Apr 11, 2026	26	—
Apr 10, 2026	27	—
Apr 9, 2026	26	—
Apr 8, 2026	29	—
Apr 7, 2026	44	—
Apr 6, 2026	79	—

Station Information

USGS Site No: 01649500
State: MD
County: Prince George's County
Coordinates: 38.9603, -76.9260
Drainage Area: 73 mi²
Datum (ft): 11.6
HUC Code: 02070010

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 7.0 ft
Flood Stage: 8.0 ft
Moderate Flood: 13.0 ft
Major Flood: 16.0 ft

Currently 7.45 ft below flood stage.

Recent Extremes

Max discharge: 1,490 cfs

Jul 19, 2025
Min discharge: 10 cfs

Jul 6, 2025
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Fourmile Run at Alexandria, VA
11.8 mi · 4 cfs

Low
Patapsco River Near Elkridge, MD
21.4 mi · 132 cfs

Normal
Patapsco River Near Catonsville, MD
21.9 mi · 123 cfs

Normal
East Branch Herbert Run at Arbutus, MD
23.1 mi · 1 cfs

Normal
Dead Run Near Catonsville, MD
25.2 mi · 0 cfs

Normal