USGS · 12147600

SOUTH FORK TOLT

USGS · 12147600LIVE

SOUTH FORK TOLT RIVER NEAR INDEX, WA

KING COUNTY, WA47.7068°N, -121.6001°W Updated 15 hr ago

FLOW RATE

10cfs

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

10cfs 0.4% vs avg

Optimal band: 20–28 cfs

PERIOD HIGH

670cfs

PERIOD LOW

4cfs

RUNNABLE

11%

last 1 year in band

Precipitation History

Precipitation · YTD

Normal

Near-normal year

2026 to date

50.9in

≈ normal

50.92 in of precipitation so far this year — about average for this point in the season (normal 49.98 in).

YTD Total

50.9in

This year so far

Normal to Date

50.0in

30-yr average

Typical Range

39.1–63.5in

10th–90th pct YTD

Departure

+2%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 8.95" · normal 12.95" (8.8–17.8)

Jan

Feb: 5.68" · normal 9.17" (4.3–15.2)

Feb

Mar: 19.17" · normal 9.84" (6.0–14.7)

Mar

Apr: 6.41" · normal 7.37" (3.4–10.7)

Apr

May: 4.24" · normal 5.35" (3.1–7.4)

May

Jun: 5.64" · normal 4.65" (2.2–6.4)

Jun

Jul: 0.82" (so far)· normal 2.12" (0.6–4.0)

Jul

Aug: normal 2.27" (0.7–3.7)

Aug

Sep: normal 4.46" (1.1–7.9)

Sep

Oct: normal 9.52" (4.2–14.8)

Oct

Nov: normal 13.53" (7.2–18.6)

Nov

Dec: normal 12.61" (8.1–18.4)

Dec

Baseline 1991–2020 · Source: Open-Meteo12:08 PM

Your History · SOUTH FORK TOLT RIVER NEAR INDEX, WA

Track your history

Sign in to track your sessions at SOUTH FORK TOLT RIVER NEAR INDEX, WA — best days, monthly trends, and time on the water.

Station Location

47.7068, -121.6001

Loading map…

DATA · USGS · NOAA · NWSUPDATED 2026-07-07 00:00 UTC

Site #12147600·USGS

Create a free account to save favorites, set flow alerts, and track conditions