USGS Streamgage 06918740
Little Sac River near Morrisville, MO
Little Sac River near Morrisville, MO is USGS streamgage 06918740 in Missouri, monitoring river discharge in hydrologic subbasin 10290106. It drains a watershed of about 237 square miles. Discharge records at this site go back to 1968. Typical flow runs near 39.7 cfs in July and 215.9 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
- Missouri
- Drainage area
- 237 sq mi
- Gauge elevation
- 884 ft
- Subbasin (HUC-8)
- 10290106
- Coordinates
- 37.48286, -93.48564
- USGS site number
- 06918740
- Records begin
- 1968-09-01 (58 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Little Sac River near Morrisville, MO. 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.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 16.9 | 19.4 | 22.7 | ||
| 15.2 | 19.1 | 35.3 | ||
| 15.2 | 19.7 | 50.4 | ||
| 14.7 | 20.3 | 72.2 | ||
| 15.1 | 21.1 | 94.7 | ||
| 14.8 | 20.9 | 78.4 | ||
| 14.8 | 20.8 | 70.8 | ||
| 14.9 | 21 | 65.1 | ||
| 14.1 | 20.5 | 70.1 | ||
| 13.8 | 20.1 | 55.7 | ||
| 13.5 | 19.3 | 39.7 | ||
| 13.2 | 18.7 | 36.7 | ||
| 13.3 | 19 | 37.5 | ||
| 13 | 18.7 | 35.7 |
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 58 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 19.3 | 101.3 | 544 | |
| February | 30.7 | 141.4 | 587.8 | |
| March | 50.1 | 216.7 | 1,028.5 | |
| April | 53.7 | 215.9 | 951.7 | |
| May | 49.2 | 181.7 | 1,065.6 | |
| June | 24.3 | 99.7 | 526.3 | |
| July | 12.6 | 39.7 | 224.8 | |
| August | 7.7 | 21.1 | 113.4 | |
| September | 7.3 | 20.9 | 149 | |
| October | 9.4 | 30.5 | 226.8 | |
| November | 15.3 | 57.6 | 499.2 | |
| December | 15.2 | 96.3 | 460.5 |
All values in cubic feet per second (cfs).
Common questions
- When does Little Sac River near Morrisville, MO normally run highest?
- March, on the long-term record. The median daily flow that month is about 216.7 cfs, against 20.9 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Little Sac River near Morrisville, MO?
- It depends on the month. In January, half of days historically fall near 101.3 cfs, with the middle 80% of days between 19.3 and 544 cfs. The month-by-month table on this page gives the full range.
- How long has Little Sac River near Morrisville, MO been measured?
- Discharge records at USGS site 06918740 begin in 1968, about 58 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 Little Sac River near Morrisville, MO?
- 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 Little Sac River near Morrisville, MO?
- The gauge sits at 37.48286, -93.48564, in Missouri, in hydrologic subbasin 10290106, at an elevation of about 884 feet, draining roughly 237 square miles.
- Can I use Little Sac River near Morrisville, MO 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.