USGS Streamgage 10149500
Diamond Fork below Red Hollow, near Thistle, UT
Diamond Fork below Red Hollow, near Thistle, UT is USGS streamgage 10149500 in Utah, monitoring river discharge in hydrologic subbasin 16020202. It drains a watershed of about 107 square miles. Discharge records at this site go back to 1953. Typical flow runs near 362.6 cfs in July and 79.2 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Utah
- Drainage area
- 107 sq mi
- Gauge elevation
- 5,300 ft
- Subbasin (HUC-8)
- 16020202
- Coordinates
- 40.07857, -111.40963
- USGS site number
- 10149500
- Records begin
- 1953-10-01 (73 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 14 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 | 12.2 | 28.5 | 117.1 | |
| February | 13.5 | 30.1 | 117.3 | |
| March | 15.4 | 52.1 | 132.4 | |
| April | 20.1 | 79.2 | 284.8 | |
| May | 66.3 | 197.2 | 354.5 | |
| June | 129.8 | 303.2 | 464.4 | |
| July | 233 | 362.6 | 443.5 | |
| August | 223.8 | 325.8 | 418.9 | |
| September | 93.5 | 174.8 | 289.6 | |
| October | 12.1 | 20 | 62.1 | |
| November | 12.3 | 21.5 | 97.2 | |
| December | 11.4 | 26.2 | 117.9 |
All values in cubic feet per second (cfs).
Common questions
- When does Diamond Fork below Red Hollow, near Thistle, UT normally run highest?
- July, on the long-term record. The median daily flow that month is about 362.6 cfs, against 20 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 Diamond Fork below Red Hollow, near Thistle, UT?
- It depends on the month. In January, half of days historically fall near 28.5 cfs, with the middle 80% of days between 12.2 and 117.1 cfs. The month-by-month table on this page gives the full range.
- How long has Diamond Fork below Red Hollow, near Thistle, UT been measured?
- Discharge records at USGS site 10149500 begin in 1953, about 73 years, covering roughly 87 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Diamond Fork below Red Hollow, near Thistle, UT?
- The gauge sits at 40.07857, -111.40963, in Utah, in hydrologic subbasin 16020202, at an elevation of about 5,300 feet, draining roughly 107 square miles.
- Can I use Diamond Fork below Red Hollow, near Thistle, UT 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.