How high is the Potomac River Near Wash, DC Little Falls Pump Sta right now?

The Potomac River Near Wash, DC Little Falls Pump Sta is currently flowing at 38,900 cubic feet per second with a gage height of 6.27 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Potomac River Near Wash, DC Little Falls Pump Sta normal for this time of year?

Current flow is classified as very high for June 11. Today's discharge is at the 102th percentile compared to the long-term historical record at this gauge.

Is the Potomac River Near Wash, DC Little Falls Pump Sta at flood stage?

No — the gage height is 3.73 feet below the NWS flood-stage threshold of 10.0 feet.

What is the historical median flow for the Potomac River Near Wash, DC Little Falls Pump Sta on June 11?

The long-term median discharge for this date is 6,750 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 3,280 to 22,600 cfs.

Where is the Potomac River Near Wash, DC Little Falls Pump Sta stream gauge located?

The Potomac River Near Wash, DC Little Falls Pump Sta stream gauge is operated by the USGS in Montgomery County, MD on the Potomac River. USGS site number 01646500 (coordinates 38.9498, -77.1276).

Potomac River Near Wash, DC Little Falls Pump Sta

USGS Site No: 01646500 • Potomac River • Montgomery County, MD

Potomac River Near Wash, DC Little Falls Pump Sta on the Potomac River is currently at 38,900 cfs (Very High — 102th percentile for this date) . Gage height: 6.27 ft.

Reading from 1 week ago

↑ Upstream on Potomac River

Potomac River at Point Of Rocks, MD

38,900

CFS Discharge

6.27

Gage Height (ft)

Very High

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
10th	Very Low threshold	3,280
25th	Low threshold	4,270
50th (Median)	Normal (median)	6,750
75th	High threshold	9,620
95th	Very High threshold	22,600

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	26,300	—
May 27, 2026	26,400	—
May 26, 2026	30,300	—
May 25, 2026	39,500	—
May 24, 2026	21,500	—
May 23, 2026	5,700	—
May 22, 2026	3,110	—
May 21, 2026	2,830	—
May 20, 2026	2,210	—
May 19, 2026	2,270	—
May 18, 2026	2,440	—
May 17, 2026	2,520	—
May 16, 2026	2,510	—
May 15, 2026	2,630	—
Apr 21, 2026	4,020	—
Apr 20, 2026	4,070	—
Apr 19, 2026	4,130	—
Apr 18, 2026	4,410	—
Apr 17, 2026	4,610	—
Apr 16, 2026	4,830	—
Apr 15, 2026	4,900	—
Apr 14, 2026	5,280	—
Apr 13, 2026	5,560	—
Apr 12, 2026	5,980	—
Apr 11, 2026	6,440	—
Apr 10, 2026	6,880	—
Apr 9, 2026	7,470	—
Apr 8, 2026	8,050	—
Apr 7, 2026	7,920	—
Apr 6, 2026	7,520	—

Station Information

USGS Site No: 01646500
State: MD
County: Montgomery County
Coordinates: 38.9498, -77.1276
Drainage Area: 11,560 mi²
Datum (ft): 37.0
HUC Code: 020700081005

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 5.0 ft
Flood Stage: 10.0 ft
Moderate Flood: 12.0 ft
Major Flood: 14.0 ft

Currently 3.73 ft below flood stage.

Recent Extremes

Max discharge: 136,000 cfs

May 15, 2025
Min discharge: 643 cfs

Jan 27, 2026
Days at flood stage: 0

Computed from the local daily-values archive.

Nearby Gauges

Fourmile Run at Alexandria, VA
7.7 mi · 4 cfs

Low
Patapsco River Near Catonsville, MD
28.5 mi · 123 cfs

Normal
Patapsco River Near Elkridge, MD
29.0 mi · 132 cfs

Normal
Patapsco River at Hollofield, MD
30.7 mi · 92 cfs

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

Normal