Spanish Fork At Castilla Flow Report
As of July 25, 2026, Spanish Fork At Castilla is flowing at 255 cfs with a gage height of 3.35 ft, receding 7% over the past 24 hours. Source: USGS gauge #10150500, refreshed throughout the day.
Historical Data
Spanish Fork At Castilla at a glance
How Spanish Fork At Castilla is running right now, where it sits on the map, and the key gauge stats.
Spanish Fork At Castilla is flowing at 255 cfs, with the water sitting 3.35 ft at the gage. Flow is down 7% since yesterday as the gauge recedes.
This is USGS gauge #10150500 in Utah. Over the past 10 days the average has been 317 cfs, peaking at 367 cfs.
For real-time updates and historical context, see the realtime view or the historical comparison. Browse other gauges in the Utah flow report.
Engineering Data
Flow-duration statistics and observed peak-flow context computed from this gauge’s complete daily record (USGS #10150500).
Estimate flows at an ungauged site
Drainage-area ratio transfer from this gauge . Most reliable for hydrologically similar sites in the same watershed with area ratios between roughly 0.5 and 1.5.
Percentiles are flow-duration values computed from this gauge’s observed daily record as archived by Snoflo. Return periods are Weibull plotting-position estimates from observed annual maxima, provided as general reference context only. Always verify against official USGS NWIS records. Part of Snoflo for Engineering.
Streamflow Forecast
Over the next 5 days, Spanish Fork At Castilla is expected to hold near today's 255 cfs, toward roughly 258 cfs by 2026-07-30 (likely range 203-329 cfs) -- running well below the seasonal normal.
Powered by PULSE — Snoflo’s forecast engine, trained on this gauge’s full record of storms, snowmelt, and dry spells.
| Date | Expected (p50) | Likely range (p25–p75) | vs normal | Projected stage |
|---|
How does this compare to past years?
Year-over-year overlay, annual peak discharge, the full distribution of daily flows on record, and the gauge's rating curve.
Weather Forecast
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day forecast
Daily temperatures, snow, and rain projected over the next two weeks.
Spanish Fork At Castilla
The river's flow is primarily sourced by snowmelt from the Wasatch Mountains and can be influenced by specific tributaries and dams. The seasonal trend shows peak flows in the spring due to snowmelt, with lower flows in the summer and fall. This gauge is critical for monitoring floods, water supply, and recreational activities. Interestingly, the Spanish Fork River was named by Spanish explorers who found a fork in the river and believed it resembled a "fork in a trail."
Nearby streamflow levels
Cross-check Spanish Fork At Castilla's discharge against nearby gauges to spot whether the change here is local or regional.
| Gauge | Streamflow |
|---|---|
| Spanish Fork At Castilla | 255 cfs |
| Diamond Fork Above Red Hollow | 42 cfs |
| Hobble Creek At 1650 West At Springville | 18 cfs |
| Sixth Water Creek Above Syar Tunnel | 24 cfs |
| Summit Creek Above Summit Creek Canal Near Santaquin Ut | 3 cfs |
| Provo River At Provo | 47 cfs |
Nearby snowpack data
Snowpack at SNOTEL stations near Spanish Fork At Castilla. Spring snowmelt is the dominant driver of streamflow in mountain basins -- a deep snowpack upstream means more runoff later in the season.
| SNOTEL station | Snowpack |
|---|---|
| Payson R.S. | 0 in |
| Nohrsc Payson R.S. | — |
| Nohrsc 11j22 - Hobble Creek Summit | 0 in |
| Hobble Creek | 0 in |
| Nohrsc Cascade Mountain | 0 in |
| Cascade Mountain | 0 in |
River levels & flood safety
- Read the level before you go
- A river that's runnable at one flow can be deadly at another. Check current discharge and gage height — like the values shown above — against the flood-stage thresholds, and remember levels can spike fast after rain or a dam release.
- Respect cold water
- Snowmelt rivers run cold even in summer. Sudden immersion triggers cold-water shock and saps strength within minutes. Wear a PFD, dress for the water temperature (not the air), and never wade or paddle alone.
- Watch for swiftwater hazards
- Strainers (downed trees), undercut rocks, and low-head dams are the deadliest features on moving water. High, fast, muddy water hides them. If in doubt, scout from shore and portage.
- Mind flash floods & releases
- Narrow canyons can flood from a storm miles upstream, and dam-controlled reaches can rise without warning. Know the forecast, the release schedule, and your exit before you launch.
Track Spanish Fork At Castilla in the Snoflo app
Save this gauge as a favorite, set push alerts when streamflow crosses a threshold (e.g. "alert me when Spanish Fork At Castilla crosses 5,000 cfs"), and Snoflo's iOS app will push the moment USGS reports the crossing.
About Spanish Fork At Castilla
What is the Spanish Fork At Castilla flow rate right now?
As of July 25, 2026, Spanish Fork At Castilla is flowing at 255 cfs. The live value, gage height, and 24-hour trend are shown at the top of this page.
Is the Spanish Fork At Castilla running high or low right now?
Check the percent of median figure on this page: above 100% means Spanish Fork At Castilla is running higher than normal for the date, below 100% means lower. The 24-hour trend shows whether it's rising or falling.
Where does the streamflow data for Spanish Fork At Castilla come from?
Discharge, gage height, and water temperature come directly from the USGS streamflow gauge 10150500. Snoflo refreshes the time series throughout the day. Forecasts come from the NOAA / yr.no feed Snoflo's iOS app uses.
How often is the report updated?
USGS gauges report continuously (typically every 15 minutes). Snoflo pulls fresh values throughout the day — look for the "as of" timestamp on the streamflow hero card.
What's the difference between discharge and gage height?
Discharge (cubic feet per second, or cfs) is the volume of water flowing past the gauge each second. Gage height is how high the water sits at the gauge (feet). They're related by a rating curve specific to each gauge — higher water means more flow, but the exact ratio depends on channel shape.
How is "percent of median" calculated?
Today's discharge is compared to the historical median discharge on this calendar day across the gauge's full record. 100% = right on median; 200% = a very high year; 30% = a drought-level low.
What are flood stages, and is this river safe right now?
Flood stages are NWS-defined gage-height thresholds — Action, Minor, Moderate, Major — marking when nearby roads or floodplains start to be affected. "Safe" depends on your activity and skill: a level that's a fun paddle for an expert can be lethal for a wader. Always check the current level against the thresholds above and the safety links, and when in doubt, stay off the water.
Can I get alerts when Spanish Fork At Castilla rises?
Yes — flow alerts are managed in the Snoflo iOS app. Favorite this gauge, set a streamflow threshold (e.g. "alert me when discharge crosses 5,000 cfs"), and you'll get a push the moment USGS reports the crossing.
Access the free Spanish Fork At Castilla report
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