MEDIAN FLOW RATE · 1 DAY
680cfs 26.1% vs avg
Optimal band: 581–787 cfs
PERIOD HIGH
694cfs
PERIOD LOW
661cfs
RUNNABLE
100%
last 1 day in band
Gauge Height
31.30ft
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
30.1in
≈ normal
30.15 in of precipitation so far this year — about average for this point in the season (normal 32.84 in).
YTD Total
30.1in
This year so far
Normal to Date
32.8in
30-yr average
Typical Range
24.1–41.6in
10th–90th pct YTD
Departure
-8%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 5.75" · normal 8.87" (5.1–12.8)
Feb: 5.91" · normal 6.27" (2.9–9.4)
Mar: 11.00" · normal 7.14" (4.1–12.3)
Apr: 3.56" · normal 5.36" (2.6–8.8)
May: 2.20" · normal 3.27" (0.9–5.4)
Jun: 1.74" (so far)· normal 2.15" (0.7–3.6)
Jul: normal 0.77" (0.1–1.6)
Aug: normal 1.24" (0.1–3.1)
Sep: normal 2.50" (0.1–4.3)
Oct: normal 6.12" (2.1–9.4)
Nov: normal 9.64" (4.3–14.8)
Dec: normal 9.33" (4.9–13.2)
Baseline 1991–2020 · Source: Open-Meteo11:56 PM
Your History · CHEHALIS RIVER AT PORTER, WA
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Weather Conditions
WEATHER CONDITIONS
TODAY
62°
54°
FRI
60°
55°
SAT
67°
49°
SUN
60°
49°
MON
64°
53°
TUE
62°
53°
WED
64°
52°
FISH INDEX
Temperature
Ideal
Wind
Calm
Pressure
Falling — Active
Moon Phase
Average
DAYLIGHT
SUNRISE
05:19 AM
SUNSET
09:12 PM
15H 53M OF DAYLIGHT19H 50M REMAINING
MOON PHASE
Waxing Gibbous
83% illuminated
Station Location
46.9393, -123.3143Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-26 01:22 UTC
Site #12031000·USGS
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