Waterlands
Big Sioux River
USGS · 06479525
BIG SIOUX RIVER
USGS · 06479525LIVE

Big Sioux R nr Castlewood, SD

HAMLIN COUNTY, SD44.7316°N, -97.0446°W Updated 14 hr ago
FLOW RATE
441cfs
GAUGE HT
7.77ft
AIR TEMP
80°F
WIND
12mph SW
FISH INDEX
50SCORE / 100
GOOD · 3 OF 5
Flow Rate Historical Avg
MEDIAN FLOW RATE · 30 DAY
441cfs 39.8% vs avg
Optimal band: 46–62 cfs
PERIOD HIGH
660cfs
PERIOD LOW
32cfs
RUNNABLE
19%
last 30 day in band

Gauge Height

7.77ft
Precipitation History
Your History · Big Sioux R nr Castlewood, SD

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SPONSORED
Weather Conditions
WEATHER CONDITIONS
TODAY
93°
67°
MON
92°
66°
TUE
100°
64°
WED
101°
66°
THU
99°
67°
FRI
102°
71°
SAT
110°
76°
TIME
SUN
3
NOW
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
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
THU
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
FRI
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
TEMP
hourly forecast
92°
mild
92°
93°
93°
92°
90°
86°
81°
78°
75°
74°
72°
70°
69°
68°
67°
66°
67°
74°
80°
83°
86°
88°
90°
91°
92°
92°
92°
91°
89°
85°
80°
76°
74°
72°
70°
69°
67°
66°
65°
64°
66°
73°
79°
85°
89°
92°
95°
97°
99°
100°
100°
98°
96°
91°
85°
80°
79°
76°
72°
70°
69°
68°
67°
66°
68°
74°
81°
86°
90°
94°
95°
97°
99°
100°
101°
100°
97°
93°
86°
78°
75°
73°
72°
70°
69°
68°
67°
67°
68°
74°
79°
84°
88°
92°
95°
97°
98°
99°
99°
98°
97°
93°
87°
83°
82°
81°
79°
78°
76°
75°
73°
71°
72°
76°
WIND
mph · gust · dir
12mph SSW
G 15 mph
12
G15
SSW
11
G14
S
12
G15
S
12
G15
S
11
G17
S
9
G19
S
6
G12
S
6
G13
SSE
6
G16
SSE
6
G17
S
5
G17
S
5
G15
SSE
6
G17
SSE
6
G16
SSE
6
G15
SSE
6
G13
SSE
5
G14
SSE
7
G24
SSW
12
G24
SSW
14
G25
SW
15
G22
SSW
16
G21
SSW
15
G21
SSW
15
G21
SSW
15
G20
SSW
14
G18
SSW
13
G18
S
14
G20
S
12
G20
S
10
G22
S
7
G14
S
7
G15
SSE
7
G18
S
7
G18
S
7
G18
S
7
G17
SSE
7
G16
SSE
6
G15
SSE
7
G17
SSE
7
G19
S
7
G23
S
11
G24
SSW
11
G19
SW
11
G16
SW
11
G14
SW
10
G12
SW
9
G11
SW
9
G10
SSW
8
G10
SSW
10
SSW
11
S
12
S
11
G13
S
9
G16
S
9
G18
SSE
11
G27
SSE
13
G30
SSE
11
G29
S
9
G29
S
8
G28
S
8
G18
S
7
G14
S
7
G14
S
7
G15
S
6
G18
SSW
8
G16
SW
9
G14
SW
7
G9
WSW
5
WSW
0
G2
S
4
G6
E
6
G9
ESE
6
G9
ESE
7
G9
ESE
8
G10
SSE
11
S
13
SSW
14
G21
S
8
G13
SSE
9
G19
ESE
9
G20
ESE
8
G13
ESE
7
G10
SE
6
G8
ESE
6
G7
E
6
G7
E
7
SE
6
SE
6
G8
ESE
6
G7
ESE
7
G8
SE
9
G11
SSE
10
G12
SSE
10
G12
SSE
12
G13
SSE
12
SSE
13
SSE
14
SSE
13
SSE
13
SSE
13
G14
SSE
12
G19
SE
13
G26
SE
17
G32
SE
16
G35
SE
17
G36
SSE
16
G35
S
15
G34
S
12
G32
S
10
G30
S
9
G29
S
10
G28
S
10
G27
SSE
11
G23
S
PRECIP
chance %
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
1%
1%
1%
1%
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
0%
CLOUDS
cover %
0%
clear
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
3%
3%
0%
0%
2%
31%
5%
4%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
6%
5%
0%
0%
0%
6%
7%
6%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
6%
11%
93%
76%
5%
0%
7%
5%
6%
5%
9%
100%
8%
76%
8%
7%
6%
6%
0%
14%
6%
15%
13%
96%
82%
100%
100%
12%
11%
0%
12%
76%
85%
8%
11%
7%
16%
17%
25%
35%
39%
29%
13%
4%
12%
PRESSURE
hPa · trend
961
961960960961961959959962960958959960958956958959957956957
TemperatureWind / GustsPrecipitationCloud coverPressure
Nowscroll →
FISH INDEX
50
Temperature
Too Hot
Wind
Moderate
Pressure
Stable
Moon Phase
Average
DAYLIGHT
SUNRISE
05:54 AM
SUNSET
09:13 PM
15H 19M OF DAYLIGHT
MOON PHASE
Waning Crescent
5% illuminated

Station Location

44.7316, -97.0446
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-12 00:00 UTC
Site #06479525·USGS

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