How high is the Nf Big Lost River at Wild Horse near Chilly ID right now?

The Nf Big Lost River at Wild Horse near Chilly ID is currently flowing at 335 cubic feet per second with a gage height of 3.31 feet, based on the most recent USGS instantaneous reading.

Is the flow on the Nf Big Lost River at Wild Horse near Chilly ID normal for this time of year?

Current flow is classified as very high for October 28. Today's discharge is at the 146th percentile compared to the long-term historical record at this gauge.

Is the Nf Big Lost River at Wild Horse near Chilly ID at flood stage?

No — the gage height is 1.80 feet below the NWS flood-stage threshold of 5.1 feet.

What is the historical median flow for the Nf Big Lost River at Wild Horse near Chilly ID on October 28?

The long-term median discharge for this date is 33 cfs based on USGS daily statistics. The 10th–95th percentile range historically is 22 to 55 cfs.

Where is the Nf Big Lost River at Wild Horse near Chilly ID stream gauge located?

The Nf Big Lost River at Wild Horse near Chilly ID stream gauge is operated by the USGS in Custer County, ID on the Nf Big Lost River. USGS site number 13120000 (coordinates 43.9328, -114.1139).

Nf Big Lost River at Wild Horse near Chilly ID

USGS Site No: 13120000 • Nf Big Lost River • Custer County, ID

Nf Big Lost River at Wild Horse near Chilly ID on the Nf Big Lost River is currently at 335 cfs (Very High — 146th percentile for this date) . Gage height: 3.31 ft.

Reading from 4 months ago

335

CFS Discharge

3.31

Gage Height (ft)

Very 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
10th	Very Low threshold	22
25th	Low threshold	28
50th (Median)	Normal (median)	33
75th	High threshold	41
95th	Very High threshold	55

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	364	—
May 27, 2026	347	—
May 26, 2026	338	—
May 25, 2026	287	—
May 24, 2026	237	—
May 23, 2026	207	—
May 22, 2026	203	—
May 21, 2026	204	—
May 20, 2026	213	—
May 19, 2026	232	—
May 18, 2026	263	—
May 17, 2026	301	—
May 16, 2026	342	—
May 15, 2026	392	—
Apr 20, 2026	102	—
Apr 19, 2026	103	—
Apr 18, 2026	104	—
Apr 17, 2026	105	—
Apr 16, 2026	122	—
Apr 15, 2026	127	—
Apr 14, 2026	132	—
Apr 13, 2026	147	—
Apr 12, 2026	163	—
Apr 11, 2026	164	—
Apr 10, 2026	148	—
Apr 9, 2026	135	—
Apr 8, 2026	126	—
Apr 7, 2026	115	—
Apr 6, 2026	105	—
Apr 5, 2026	102	—

Station Information

USGS Site No: 13120000
State: ID
County: Custer County
Coordinates: 43.9328, -114.1139
Drainage Area: 115 mi²
Datum (ft): 6,862.0
HUC Code: 170402180304

View on USGS NWIS →

Flood Stage Thresholds

Action Stage: 4.8 ft
Flood Stage: 5.1 ft

Currently 1.80 ft below flood stage.

Recent Extremes

Max discharge: 457 cfs

Jun 1, 2025
Min discharge: 19 cfs

Jan 26, 2026
Days at flood stage: 0

Computed from the local daily-values archive.

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