Snake River near Heise, ID
Eastern Idaho (Henrys Fork & Snake) · USGS gauge 13037500 · Updated Oct 24, 2:37 PM PDT · USGS data, provisional
All 3 Snake River gauges in Idaho
Reading time: Oct 24, 2:30 PM PDT · Provisional data
Flow is far below normal for the date. Expect shallow riffles and slower water; some stretches may be hard to float and fish can be stressed by low flows. Check local reports for the specific stretch.
- Vs. normal for this date
- 10th percentile
- Typical range (25th–75th)
- 2,700–3,740 cfs
- Median for this date
- 3,110 cfs
- 7-day low / high
- 2,010 / 4,020 cfs
Plain-language explanation
Snake River near Heise is flowing at 2,040 cubic feet per second (cfs) as of Oct 24, 2:30 PM PDT. That is among the lowest flows on record for this time of year: lower than about 90% of the daily flows this gauge has recorded for this date (give or take 7 days) over 117 years of record (1910–2026).
The middle half of those historical flows runs from 2,700 to 3,740 cfs, with a median of 3,110 cfs; the lowest 10% of days are at or below 2,046 cfs and the highest 10% at or above 4,300 cfs.
Over the last 24 hours the flow has been steady (+0.0%). In the last 7 days it ranged from 2,010 to 4,020 cfs.
Why this status: Flow is at or below the seasonal 10th percentile and in the lower 40% of all days on record.
Quick answers
Is the Snake River near Heise fishable today?
Flowcast's status for the Snake River near Heise is “Too low”: flow is 2,040 cfs, well below normal for the date, at the 10th percentile for this date (as of Oct 24, 2:30 PM PDT). That describes flow only. It says nothing about water clarity, temperature, fish activity, access or fishing regulations.
What is the current flow of the Snake River near Heise?
2,040 cubic feet per second at USGS gauge 13037500 as of Oct 24, 2:30 PM PDT, provisional data.
Is the Snake River near Heise too high or too low right now?
It is on the low side: below the typical range for the date (2,700 to 3,740 cfs).
Is the Snake River near Heise rising or falling?
Over the last 24 hours the flow has been steady (+0.0%).
What is a normal flow for the Snake River near Heise in October?
For this date (give or take 7 days) the median is 3,110 cfs and the middle half of days runs 2,700 to 3,740 cfs, over 117 years of USGS record.
7-day trend
Hourly flow in cfs, Pacific time. The shaded band is the typical range (25th–75th percentile) for this date, shown when it falls within the chart.
| Day (Pacific) | Mean cfs | Percentile | Status that day |
|---|---|---|---|
| Sun Oct 18 | 3,056 | 34th | Fishable/Floatable |
| Mon Oct 19 | 3,053 | 36th | Fishable/Floatable |
| Tue Oct 20 | 2,405 | 14th | Fishable/Floatable |
| Wed Oct 21 | 2,366 | 14th | Fishable/Floatable |
| Thu Oct 22 | 2,078 | 10th | Too low |
| Fri Oct 23 | 2,064 | 10th | Fishable/Floatable |
| Sat Oct 24 (so far) | 2,061 | 11th | Fishable/Floatable |
Seasonal context
Shaded band: 10th–90th percentile of daily flows through the year; dashed line: median. Log scale. Dot: today's flow. Based on 117 years of USGS daily data (1910–2026).
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Official resources
- USGS site page for gauge 13037500 (USGS: live readings, history, station details)
- Idaho Fishing Planner: waters, rules, access (IDFG)
Links go to the agencies' own websites and were checked as working. Flowcast does not summarize fishing or boating rules: regulations and closures change, and the agency pages are the authority.
About this gauge
- USGS site
- USGS-13037500
- USGS name
- Snake River Nr Heise Id
- Drainage area
- 5,752 sq mi
- Location
- 43.6125, -111.6600
- Record in this analysis
- 1910–2026
Nearby gauges
- Henrys Fork at St. Anthony, ID Fishable/Floatable 1,370 cfs · about 24 mi away (straight line)
- Snake River near Irwin, ID Fishable/Floatable 1,420 cfs · about 29 mi away (straight line)
- Henrys Fork near Ashton, ID Fishable/Floatable 804 cfs · about 32 mi away (straight line)
- Henrys Fork near Island Park, ID Fishable/Floatable 91.9 cfs · about 57 mi away (straight line)
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