USGS Streamgage 06642000
North Platte River at Alcova, WY
North Platte River at Alcova, WY is USGS streamgage 06642000 in Wyoming, monitoring river discharge in hydrologic subbasin 10180007. It sits on the North Platte River, alongside 4 other gauges Rivermatics tracks on the same river. It drains a watershed of about 10,812 square miles. Discharge records at this site go back to 1904. Typical flow runs near 2,467.1 cfs in July and 663.3 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Wyoming
- Drainage area
- 10,812 sq mi
- Gauge elevation
- 5,306 ft
- Subbasin (HUC-8)
- 10180007
- Coordinates
- 42.57411, -106.69259
- USGS site number
- 06642000
- Records begin
- 1904-03-01 (122 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 95 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 | 3.9 | 563.3 | 912.9 | |
| February | 3.6 | 520.6 | 921.4 | |
| March | 3.7 | 514.2 | 1,330.9 | |
| April | 3 | 663.3 | 2,232 | |
| May | 28.5 | 1,322.4 | 3,787.1 | |
| June | 304.2 | 1,824.7 | 4,956 | |
| July | 1,095.2 | 2,467.1 | 5,241.6 | |
| August | 1,061.3 | 2,622.3 | 4,793.9 | |
| September | 314.3 | 1,317.9 | 2,891.3 | |
| October | 4.9 | 583.1 | 1,427.1 | |
| November | 4.3 | 581.9 | 1,148.6 | |
| December | 4.3 | 559.3 | 944.5 |
All values in cubic feet per second (cfs).
Common questions
- When does North Platte River at Alcova, WY normally run highest?
- August, on the long-term record. The median daily flow that month is about 2,622.3 cfs, against 514.2 cfs in March, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for North Platte River at Alcova, WY?
- It depends on the month. In January, half of days historically fall near 563.3 cfs, with the middle 80% of days between 3.9 and 912.9 cfs. The month-by-month table on this page gives the full range.
- How long has North Platte River at Alcova, WY been measured?
- Discharge records at USGS site 06642000 begin in 1904, about 122 years. The long record is what makes the monthly percentiles on this page meaningful.
- Where is North Platte River at Alcova, WY?
- The gauge sits at 42.57411, -106.69259, in Wyoming, in hydrologic subbasin 10180007, at an elevation of about 5,306 feet, draining roughly 10,812 square miles.
- Can I use North Platte River at Alcova, WY 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 North Platte River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the North Platte River in full.
- North Platte River below Pathfinder Reservoir, WY 10,702 sq mi
- North Platte River at Alcova, WY this page
- North Platte River at Orin, WY 15,025 sq mi
- North Platte River below Whalen Diversion Dam, WY 16,318 sq mi
- North Platte River at Scottsbluff, Nebr. 24,500 sq mi