USGS · 06191500

YELLOWSTONE RIVER

USGS · 06191500LIVE

Yellowstone River at Corwin Springs MT

PARK COUNTY, MT45.1121°N, -110.7937°W Updated 37 min ago

FLOW RATE

4,990cfs

AIR TEMP

87°F

WIND

8mph NNW

FISH INDEX

63SCORE / 100

GOOD · 3 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 7 DAY

4,990cfs 24.2% vs avg

Optimal band: 4,468–6,044 cfs

PERIOD HIGH

5,729cfs

PERIOD LOW

4,990cfs

RUNNABLE

100%

last 7 day in band

Precipitation History

Precipitation · YTD

Normal

Near-normal year

2026 to date

13.0in

≈ normal

12.97 in of precipitation so far this year — about average for this point in the season (normal 15.09 in).

YTD Total

13.0in

This year so far

Normal to Date

15.1in

30-yr average

Typical Range

12.3–17.8in

10th–90th pct YTD

Departure

-14%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 1.01" · normal 1.81" (1.2–2.8)

Jan

Feb: 1.60" · normal 1.71" (0.7–2.7)

Feb

Mar: 2.10" · normal 2.20" (1.1–3.1)

Mar

Apr: 2.42" · normal 2.88" (2.0–3.9)

Apr

May: 2.70" · normal 2.94" (1.8–4.1)

May

Jun: 2.70" · normal 2.90" (1.6–4.3)

Jun

Jul: 0.43" (so far)· normal 1.68" (0.8–2.6)

Jul

Aug: normal 1.41" (0.7–2.5)

Aug

Sep: normal 1.77" (0.8–2.7)

Sep

Oct: normal 2.27" (1.4–3.3)

Oct

Nov: normal 2.01" (1.0–3.5)

Nov

Dec: normal 1.95" (1.0–2.7)

Dec

Baseline 1991–2020 · Source: Open-Meteo12:37 AM

Your History · Yellowstone River at Corwin Springs MT

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Station Location

45.1121, -110.7937

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DATA · USGS · NOAA · NWSUPDATED 2026-07-10 00:00 UTC

Site #06191500·USGS

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