Waterlands
Chehalis River
USGS · 12027500
CHEHALIS RIVER
USGS · 12027500LIVE

CHEHALIS RIVER NEAR GRAND MOUND, WA

THURSTON COUNTY, WA46.7759°N, -123.0357°W Updated 1 d ago
FLOW RATE
410cfs
AIR TEMP
63°F
WIND
6mph NW
FISH INDEX
81SCORE / 100
GREAT · 4 OF 5
Flow Rate Historical Avg
MEDIAN FLOW RATE · 30 DAY
410cfs 22.6% vs avg
Optimal band: 505683 cfs
PERIOD HIGH
1,862cfs
PERIOD LOW
410cfs
RUNNABLE
57%
last 30 day in band
Precipitation History

Precipitation · YTD

Dry

Drier than normal

2026 to date

23.7in

-16% vs normal

23.72 in of precipitation so far this year, 16% below the 30-year normal of 28.4 in for this point in the season.

YTD Total

23.7in

This year so far

Normal to Date

28.4in

30-yr average

Typical Range

21.1–35.9in

10th–90th pct YTD

Departure

-16%

vs 30-yr normal

By Month

This year
Typical range
Normal
Jan: 5.38" · normal 7.33" (4.5–10.4)
Jan
Feb: 4.63" · normal 5.35" (2.7–8.1)
Feb
Mar: 8.09" · normal 6.10" (3.4–10.2)
Mar
Apr: 2.53" · normal 4.80" (2.3–7.4)
Apr
May: 1.61" · normal 3.05" (0.9–4.8)
May
Jun: 1.49" (so far)· normal 1.97" (0.8–3.0)
Jun
Jul: normal 0.66" (0.1–1.2)
Jul
Aug: normal 1.00" (0.2–2.0)
Aug
Sep: normal 2.13" (0.2–3.9)
Sep
Oct: normal 5.04" (2.2–7.6)
Oct
Nov: normal 8.15" (4.0–12.4)
Nov
Dec: normal 7.85" (3.8–11.4)
Dec
Baseline 19912020 · Source: Open-Meteo10:27 PM
Your History · CHEHALIS RIVER NEAR GRAND MOUND, WA

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Weather Conditions
WEATHER CONDITIONS
TODAY
66°
53°
FRI
62°
54°
SAT
67°
49°
SUN
61°
47°
MON
63°
54°
TUE
64°
52°
WED
63°
50°
TIME
FRI
12
NOW
1
am
2
am
3
am
4
am
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am
6
am
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7
pm
8
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9
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11
pm
SAT
12
am
1
am
2
am
3
am
4
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6
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7
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8
am
9
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10
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2
pm
3
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4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
SUN
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
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11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
MON
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
TUE
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
TEMP
hourly forecast
57°
mild
57°
57°
57°
57°
57°
57°
57°
57°
58°
58°
59°
59°
62°
59°
59°
61°
61°
60°
60°
60°
58°
56°
55°
54°
54°
54°
54°
53°
52°
53°
53°
53°
54°
56°
59°
62°
65°
66°
66°
67°
64°
63°
66°
65°
62°
59°
54°
49°
48°
47°
47°
50°
53°
53°
52°
52°
52°
54°
56°
58°
59°
59°
60°
60°
61°
60°
59°
60°
58°
56°
56°
54°
55°
54°
54°
54°
54°
54°
54°
56°
58°
61°
60°
60°
62°
63°
61°
62°
63°
63°
63°
62°
58°
56°
55°
54°
54°
54°
53°
53°
53°
53°
52°
53°
53°
54°
55°
57°
59°
62°
63°
64°
64°
WIND
mph · gust · dir
7mph S
G 14 mph
7
G14
S
8
G19
S
8
G20
S
9
G23
S
9
G21
S
8
G20
S
8
G21
SSW
6
G14
SW
6
G18
SW
7
G14
SW
7
G14
W
8
G16
WSW
7
G12
WSW
8
G14
W
9
G15
W
10
G15
W
9
G16
W
9
G15
WSW
8
G13
W
8
G13
W
8
G13
WNW
8
G16
W
6
G16
WNW
5
G14
WNW
3
G13
WSW
3
G13
WSW
3
G14
WSW
3
G14
SSW
3
G13
S
3
G16
SSE
3
G15
SW
4
G16
WSW
3
G16
WSW
4
G11
W
5
G8
W
4
G7
W
4
G7
NW
6
G7
NNW
6
G8
NNW
7
G9
WNW
10
G13
WNW
8
G14
NW
9
WNW
7
G10
WNW
6
G14
W
7
G17
W
6
G13
W
4
G8
WSW
4
G7
WSW
4
G5
SW
4
G9
SSW
4
G11
SW
4
G10
SW
4
G9
SW
4
G9
S
4
G10
S
5
G11
S
5
G11
S
6
G12
SSW
6
G13
SSW
6
G14
SSW
5
G13
SW
6
G12
WSW
7
G11
WSW
7
G12
WSW
7
G12
WSW
7
G13
WSW
6
G12
WSW
4
G11
SW
5
G9
SW
5
G11
SW
4
G9
SSW
4
G7
SSW
4
G7
SW
4
G7
SW
4
G7
SW
4
G7
SW
4
G8
SW
4
G8
SW
4
G8
SW
5
G8
SW
6
G9
WSW
6
G9
WSW
5
G9
WSW
5
G9
W
7
G9
W
7
G10
W
7
G10
WSW
8
G9
WSW
7
G9
SW
6
G10
SW
6
G11
WSW
7
G13
W
5
G13
W
4
G5
WSW
3
G8
SW
3
G10
SSW
4
G11
SSW
4
G10
SSW
4
G11
S
4
G11
S
4
G11
S
4
G11
S
4
G12
SSW
4
G13
SSW
4
G13
SSW
4
G12
SSW
4
G11
SSW
5
G11
SW
6
G11
WSW
7
G11
WSW
8
G11
WSW
9
G12
W
PRECIP
chance %
33%
33%
34%
24%
23%
17%
18%
19%
19%
21%
19%
15%
21%
19%
24%
18%
20%
18%
13%
5%
4%
7%
8%
7%
4%
3%
8%
8%
8%
22%
22%
33%
33%
33%
33%
33%
33%
45%
45%
45%
45%
45%
45%
9%
9%
9%
9%
9%
9%
4%
4%
4%
4%
4%
4%
20%
20%
20%
20%
20%
20%
17%
17%
17%
17%
17%
17%
12%
12%
12%
12%
12%
12%
11%
11%
11%
11%
11%
11%
14%
14%
14%
14%
14%
14%
12%
12%
12%
12%
12%
12%
6%
6%
6%
6%
6%
6%
7%
7%
7%
7%
7%
7%
8%
8%
8%
8%
8%
8%
11%
11%
11%
11%
11%
CLOUDS
cover %
100%
overcast
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
99%
99%
98%
100%
94%
98%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
99%
79%
100%
78%
100%
100%
86%
77%
100%
100%
52%
26%
5%
6%
13%
76%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
88%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
75%
82%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
PRESSURE
hPa · trend
1003
1003100210041005100610071007100810111012101110101011101010111010101210111011
TemperatureWind / GustsPrecipitationCloud coverPressure
Nowscroll →
FISH INDEX
81
Temperature
Ideal
Wind
Light
Pressure
Falling — Active
Moon Phase
Average
DAYLIGHT
SUNRISE
05:19 AM
SUNSET
09:10 PM
15H 51M OF DAYLIGHT21H 9M REMAINING
MOON PHASE
Waxing Gibbous
83% illuminated

Station Location

46.7759, -123.0357
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-26 00:01 UTC
Site #12027500·USGS

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