Rivermatics

USGS Streamgage 06872500

NF Solomon River at Portis, KS

NF Solomon River at Portis, KS is USGS streamgage 06872500 in Kansas, monitoring river discharge in hydrologic subbasin 10260012. It sits on the Nf Solomon River, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 2,315 square miles. Discharge records at this site go back to 1945. Typical flow runs near 41.3 cfs in July and 41.5 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

Gauge details

State
Kansas
Drainage area
2,315 sq mi
Gauge elevation
1,531 ft
Subbasin (HUC-8)
10260012
Coordinates
39.553, -98.69232
USGS site number
06872500
Records begin
1945-09-17 (81 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for NF Solomon River at Portis, KS. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
13.2 14.8 16.1
11.9 14.4 17.7
11.6 14.6 20.6
10.8 14.5 22.2
11.5 15.7 28.2
11.6 16.9 35.9
11.8 18.4 50.8
13.6 23.2 102
11.8 20.4 58.6
10.6 19.5 49.6
9.9 18 43.3
9.5 16.9 40.1
9.3 16.4 38
9.1 15.8 32.1

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 81 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 10.5 25.8 130.5
February 14.7 35.1 150.2
March 16.9 39.8 173.6
April 15.2 41.5 190.1
May 14.5 50 364.3
June 14 56.3 544.4
July 7.5 41.3 392.8
August 7.8 37.8 218
September 6.7 26.9 143.3
October 7.4 21 112.4
November 9.2 23.5 108.5
December 9.8 24.4 115.3

All values in cubic feet per second (cfs).

Common questions

When does NF Solomon River at Portis, KS normally run highest?
June, on the long-term record. The median daily flow that month is about 56.3 cfs, against 21 cfs in October, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for NF Solomon River at Portis, KS?
It depends on the month. In January, half of days historically fall near 25.8 cfs, with the middle 80% of days between 10.5 and 130.5 cfs. The month-by-month table on this page gives the full range.
How long has NF Solomon River at Portis, KS been measured?
Discharge records at USGS site 06872500 begin in 1945, about 81 years, covering roughly 9,200 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for NF Solomon River at Portis, KS?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is NF Solomon River at Portis, KS?
The gauge sits at 39.553, -98.69232, in Kansas, in hydrologic subbasin 10260012, at an elevation of about 1,531 feet, draining roughly 2,315 square miles.
Can I use NF Solomon River at Portis, KS data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Upstream and downstream on the Nf Solomon River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Nf Solomon River in full.

Other gauges in this region