Waterlands
Columbia Slough
USGS · 14211820
COLUMBIA SLOUGH
USGS · 14211820LIVE

COLUMBIA SLOUGH AT PORTLAND, OR

PORTLAND, OR45.6390°N, -122.7632°W Updated 14 hr ago
FLOW RATE
129cfs
AIR TEMP
57°F
WIND
5mph SSW
FISH INDEX
75SCORE / 100
GREAT · 4 OF 5
Flow Rate Historical Avg
MEDIAN FLOW RATE · 30 DAY
129cfs 87.2% vs avg
Optimal band: 235317 cfs
PERIOD HIGH
493cfs
PERIOD LOW
83cfs
RUNNABLE
32%
last 30 day in band
Precipitation History

Precipitation · YTD

Dry

Drier than normal

2026 to date

21.1in

-33% vs normal

21.14 in of precipitation so far this year, 33% below the 30-year normal of 31.79 in for this point in the season.

YTD Total

21.1in

This year so far

Normal to Date

31.8in

30-yr average

Typical Range

22.5–40.5in

10th–90th pct YTD

Departure

-33%

vs 30-yr normal

By Month

This year
Typical range
Normal
Jan: 3.57" · normal 7.95" (4.8–11.3)
Jan
Feb: 5.82" · normal 5.96" (2.7–8.8)
Feb
Mar: 5.13" · normal 6.81" (3.7–11.1)
Mar
Apr: 3.94" · normal 5.41" (2.7–7.9)
Apr
May: 1.35" · normal 3.53" (1.2–5.5)
May
Jun: 1.34" (so far)· normal 2.34" (1.2–3.4)
Jun
Jul: normal 0.67" (0.1–1.3)
Jul
Aug: normal 0.88" (0.2–1.6)
Aug
Sep: normal 2.41" (0.2–4.5)
Sep
Oct: normal 5.43" (2.1–9.0)
Oct
Nov: normal 8.75" (4.3–13.1)
Nov
Dec: normal 8.87" (4.8–13.0)
Dec
Baseline 19912020 · Source: Open-Meteo02:27 PM
Your History · COLUMBIA SLOUGH AT PORTLAND, OR

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Weather Conditions
WEATHER CONDITIONS
TODAY
67°
56°
SAT
64°
54°
SUN
64°
48°
MON
67°
54°
TUE
75°
49°
WED
64°
49°
THU
62°
45°
TIME
FRI
2
NOW
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
SAT
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
SUN
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
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
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
WED
12
am
1
am
2
am
3
am
4
am
5
am
6
am
TEMP
hourly forecast
65°
mild
65°
67°
67°
66°
64°
64°
62°
60°
60°
58°
57°
57°
57°
56°
56°
55°
55°
54°
55°
55°
56°
57°
59°
57°
62°
62°
60°
64°
61°
61°
60°
58°
56°
56°
56°
57°
56°
55°
52°
50°
48°
51°
54°
54°
55°
57°
61°
64°
62°
63°
64°
63°
61°
61°
58°
57°
56°
56°
56°
56°
56°
56°
56°
54°
54°
55°
55°
56°
58°
62°
65°
66°
66°
66°
65°
66°
67°
66°
64°
62°
60°
57°
56°
56°
56°
56°
56°
55°
55°
56°
57°
59°
60°
61°
66°
68°
71°
74°
75°
73°
69°
65°
60°
56°
52°
49°
50°
53°
55°
55°
54°
53°
54°
WIND
mph · gust · dir
9mph W
G 14 mph
9
G14
W
7
G14
W
8
G13
W
10
G15
WNW
9
G15
W
10
G15
W
9
G15
W
7
G15
W
7
G14
W
4
G12
WNW
4
G9
WNW
2
G9
SW
3
G9
WSW
2
G8
SW
3
G8
SSW
5
G11
WSW
4
G11
W
6
G9
WSW
3
G7
SW
4
G8
SW
5
G11
SW
3
G11
WSW
3
G8
SW
10
G17
NW
7
G13
NW
5
G12
NNW
8
G15
WNW
9
G15
WNW
4
G11
WNW
3
G11
WNW
4
G12
W
5
G12
W
5
G9
W
5
G8
W
1
G5
NNW
2
G4
SSE
2
G4
SSE
1
G4
SSE
1
G3
SW
1
G2
WNW
0
S
2
G3
S
3
G4
SSW
2
G4
SW
1
G3
WSW
2
WSW
2
G4
SSW
2
G5
SW
3
G4
NNW
3
G5
NE
2
G8
NNE
4
G16
N
6
G16
NW
9
G15
NW
7
G17
NW
4
G17
NW
2
G8
WNW
1
G2
SW
2
SSW
2
SSW
2
SW
2
G3
SW
2
WSW
2
SW
2
SW
2
SSW
1
G3
SSW
2
G3
SSW
3
G4
S
3
G5
S
4
G5
SSE
3
G5
SSE
3
G5
S
3
G5
SSW
3
G5
SSW
2
G5
WSW
2
G6
WNW
2
G6
NW
3
G6
NW
4
G10
NW
4
G14
NNW
5
G15
NNW
4
G16
NNW
3
G16
NNW
3
G12
NW
2
G10
WNW
2
G10
WNW
1
G10
WNW
1
G9
W
1
G5
S
3
G5
SSE
3
G5
SSE
1
G3
SSE
1
G4
NE
2
G7
E
2
G8
ESE
2
G11
E
4
G11
NE
5
G11
N
11
G12
NW
13
G14
NW
11
G15
NW
9
G18
NW
8
G20
NW
5
G17
NW
4
G7
NW
3
G6
WNW
3
G5
WNW
3
G5
W
3
G4
W
3
G4
WSW
3
SW
3
SSW
PRECIP
chance %
10%
10%
14%
5%
4%
2%
1%
2%
5%
6%
9%
7%
9%
8%
12%
10%
15%
16%
16%
17%
19%
26%
29%
44%
46%
45%
46%
47%
42%
59%
59%
59%
59%
59%
59%
4%
4%
4%
4%
4%
4%
18%
18%
18%
18%
18%
18%
14%
14%
14%
14%
14%
14%
4%
4%
4%
4%
4%
4%
6%
6%
6%
6%
6%
6%
9%
9%
9%
9%
9%
9%
6%
6%
6%
6%
6%
6%
3%
3%
3%
3%
3%
3%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
3%
3%
3%
3%
3%
3%
1%
1%
1%
1%
1%
1%
2%
2%
2%
2%
2%
2%
4%
CLOUDS
cover %
100%
overcast
100%
100%
100%
100%
100%
100%
100%
100%
100%
67%
100%
100%
100%
77%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
98%
100%
100%
100%
100%
100%
100%
20%
17%
100%
100%
100%
100%
99%
61%
36%
16%
6%
80%
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%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
99%
100%
100%
100%
100%
87%
60%
51%
7%
8%
100%
100%
100%
43%
53%
75%
92%
98%
99%
100%
100%
PRESSURE
hPa · trend
1009
1009101010111013101510161018101810171017101610161016101510161017101510151016
TemperatureWind / GustsPrecipitationCloud coverPressure
Nowscroll →
FISH INDEX
75
Temperature
Ideal
Wind
Light
Pressure
Stable
Moon Phase
Average
DAYLIGHT
SUNRISE
05:23 AM
SUNSET
09:04 PM
15H 41M OF DAYLIGHT6H 36M REMAINING
MOON PHASE
Waxing Gibbous
87% illuminated

Station Location

45.6390, -122.7632
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-26 14:28 UTC
Site #14211820·USGS

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