USGS Streamgage 08446500
Pecos River near Girvin, TX
Pecos River near Girvin, TX is USGS streamgage 08446500 in Texas, monitoring river discharge in hydrologic subbasin 13070001. It drains a watershed of about 37,300 square miles. Discharge records at this site go back to 1939. Typical flow runs near 14.2 cfs in July and 20.9 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Texas
- Drainage area
- 37,300 sq mi
- Gauge elevation
- 2,285 ft
- Subbasin (HUC-8)
- 13070001
- Coordinates
- 31.1132, -102.41764
- USGS site number
- 08446500
- Records begin
- 1939-09-01 (87 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 87 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 | 14.3 | 31.4 | 72.8 | |
| February | 13.4 | 30.9 | 72.2 | |
| March | 14 | 27.8 | 73.6 | |
| April | 10.5 | 20.9 | 64.3 | |
| May | 6.5 | 15.9 | 66.4 | |
| June | 4.9 | 14.5 | 61.5 | |
| July | 4.2 | 14.2 | 56.9 | |
| August | 4.3 | 16.2 | 55.6 | |
| September | 5.3 | 20.3 | 72 | |
| October | 9.1 | 28.5 | 117.2 | |
| November | 12.3 | 28.3 | 94.8 | |
| December | 13 | 30.5 | 78.6 |
All values in cubic feet per second (cfs).
Common questions
- When does Pecos River near Girvin, TX normally run highest?
- January, on the long-term record. The median daily flow that month is about 31.4 cfs, against 14.2 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Pecos River near Girvin, TX?
- It depends on the month. In January, half of days historically fall near 31.4 cfs, with the middle 80% of days between 14.3 and 72.8 cfs. The month-by-month table on this page gives the full range.
- How long has Pecos River near Girvin, TX been measured?
- Discharge records at USGS site 08446500 begin in 1939, about 87 years, covering roughly 9,125 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Pecos River near Girvin, TX?
- The gauge sits at 31.1132, -102.41764, in Texas, in hydrologic subbasin 13070001, at an elevation of about 2,285 feet, draining roughly 37,300 square miles.
- Can I use Pecos River near Girvin, TX 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.