MEDIAN FLOW RATE · 30 DAY
30cfs 59.5% vs avg
Optimal band: 21–29 cfs
PERIOD HIGH
127cfs
PERIOD LOW
18cfs
RUNNABLE
39%
last 30 day in band
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
11.3in
≈ normal
11.29 in of precipitation so far this year — about average for this point in the season (normal 11.56 in).
YTD Total
11.3in
This year so far
Normal to Date
11.6in
30-yr average
Typical Range
8.6–14.4in
10th–90th pct YTD
Departure
-2%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 0.21" · normal 0.68" (0.3–1.1)
Feb: 0.66" · normal 0.75" (0.3–1.3)
Mar: 2.43" · normal 1.35" (0.8–2.1)
Apr: 2.51" · normal 2.35" (1.6–3.2)
May: 2.08" · normal 2.99" (1.5–4.1)
Jun: 3.08" · normal 3.01" (1.5–4.9)
Jul: 0.34" (so far)· normal 1.29" (0.4–2.8)
Aug: normal 1.02" (0.3–1.9)
Sep: normal 1.53" (0.6–2.9)
Oct: normal 1.56" (0.7–2.6)
Nov: normal 1.15" (0.5–1.9)
Dec: normal 0.91" (0.3–1.6)
Baseline 1991–2020 · Source: Open-Meteo03:46 PM
Your History · Willow Creek near Harrison MT
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Station Location
45.7231, -111.7410Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-09 00:00 UTC
Site #06035000·USGS
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