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South Fork Tolt River near Index water level

River gauge, South Fork Tolt River, Washington, United States

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Right now

Low for mid-October

Water level

0.74ft Down 0.06 ft over the last 24 hours

Flow
6.1 cfs
Water temperature
45 °F
1.0 1.5 2.0

History

History
0.51.01.52.0ftOct 13Oct 14Oct 16Oct 18Oct 190.51.01.52.0ftOct 13Oct 16Oct 19
12ftSep 20Sep 27Oct 4Oct 12Oct 1912ftSep 20Oct 4Oct 19
1234ftOct 2025Jan 2026Apr 2026Jul 2026Oct 20261234ftOct 2025Apr 2026Oct 2026
1234ftJanMarMayJulSepNov20261234ftJanAprJulOct2026

20252026

Water level Normal range (10–90 %)

What this means

At 0.74 ft, the South Fork Tolt River near Index is below normal for mid-October.

The median for mid-October is 1.26 ft, based on 39 years of readings, so the river stage is 0.52 ft below typical. On the same day last year the reading was 2.29 ft, a difference of −1.55 ft.

The level is falling, down 0.06 ft over the past 24 hours. Without real rain upstream, that is unlikely to change quickly. Over the past 30 days it has moved between 0.52 ft and 1.46 ft.

Fall is often low-water season on rivers, and it usually takes a few days of steady rain to change that. The water temperature at the gauge is 45 °F.

Compared with 39 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
1.26 ft0.52 ft below the median for this date
Normal for this date
0.71 ft – 2.14 ft8 years in 10 fall in this range (39 years of records)
Same day last year
2.29 ft−1.55 ft
Lowest and highest in 30 days
0.52 ft – 1.46 ft
Lowest and highest in 12 months
0.48 ft – 3.87 ft

What the stage means on the water

Low water means more dragging on shallow riffles and slower floats. Fish crowd into the deeper runs, and warm, low water stresses them, so play and release them quickly.

Weather at the gauge

Rain in the last 3 days: 0.32 in. Rain that falls upstream can take hours or days to show up at a river gauge.

19 Mon 54° 44° – Wind 6 mph
20 Tue 65° 47° – Wind 7 mph
21 Wed 65° 46° – Wind 6 mph
22 Thu 57° 43° – Wind 6 mph
23 Fri 51° 39° – Wind 5 mph
24 Sat 59° 36° – Wind 6 mph
25 Sun 61° 42° – Wind 6 mph

Forecast: Open-Meteo

Sunrise 07:32 AM Sunset 06:12 PM Daylight 10 hr, 40 min First quarter 61%

Map

Other gauges on the South Fork Tolt River

Gauge Level Compared with normal 24 hours Distance
South Fork Tolt River near CarnationRiver gauge, South Fork Tolt River 1.87 ft Very low −0.01 ft 5.4 mi

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Phelps Creek below Unnamed Tributary near IndexRiver gauge, Phelps Creek 5.83 ft Low −0.06 ft 0.2 mi
Nf Tolt River above Yellow Creek near CarnationRiver gauge, Nf Tolt River 44.6 cfs Low −14.7 cfs 7 mi
Nf Snoqualmie River near Snoqualmie FallsRiver gauge, Nf Snoqualmie River 2.19 ft Low −0.13 ft 8 mi
Sf Tolt River below Regulating Basin near CarnationRiver gauge, Sf Tolt River 3.13 ft Very low ±0 9 mi
Skykomish River near Gold BarRiver gauge, Skykomish River 4.40 ft Normal −0.05 ft 10 mi
Tolt River near CarnationRiver gauge, Tolt River 4.45 ft Low −0.09 ft 10 mi
South Fork Skykomish River at SkykomishRiver gauge, South Fork Skykomish River 17.08 ft Below flood stage −0.03 ft 11 mi
Snoqualmie River near CarnationRiver gauge, Snoqualmie River 44.60 ft Very low −0.04 ft 15 mi

Questions and answers

Is the South Fork Tolt River near Index higher than last year?

No, it is 1.55 ft lower than on the same day last year, when the reading was 2.29 ft.

What is a normal level for the South Fork Tolt River near Index in mid-October?

The median for mid-October is 1.26 ft. In 8 years out of 10 the reading falls between 0.71 ft and 2.14 ft, based on 39 years of records.

Is gage height the same as water depth?

No. Gage height is measured from a fixed reference point chosen by the agency, so a reading of 10 ft does not mean the river is 10 ft deep.

What is the water level of South Fork Tolt River near Index today?

On Oct 19, 2026, 09:30 AM PDT, the water level was 0.74 ft. Down 0.06 ft over the last 24 hours.

Is South Fork Tolt River near Index rising or falling?

Down 0.06 ft over the last 24 hours. Down 0.14 ft over the last 7 days.

Is the level of South Fork Tolt River near Index normal?

Low for mid-October. Compared with 39 years of daily readings for this time of year.

How often is this data updated?

The U.S. Geological Survey publishes a new reading every 15 minutes. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Geological Survey
Station code
usgs:12147600 (Agency page)
Coordinates
47.70677, -121.60011 (WGS84)
Vertical datum
NAVD88
Update interval
every 15 minutes
Licence
Public domain. Data: U.S. Geological Survey (USGS), provisional data subject to revision

Published series

ParameterLast valueTime (UTC)Quality
Water level 0.74 ft 2026-10-19 16:30 Provisional
Flow 6.1 cfs 2026-10-19 16:30 Provisional
Water temperature 45 °F 2026-10-19 16:30 Provisional

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How to cite

U.S. Geological Survey: South Fork Tolt River near Index (usgs:12147600). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/washington/south-fork-tolt-river-near-index

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.