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 min ago
FLOW RATE
409cfs
GAUGE HT
7.56ft
AIR TEMP
78°F
WIND
7mph S
FISH INDEX
81SCORE / 100
GREAT · 4 OF 5
Flow Rate Historical Avg
MEDIAN FLOW RATE · 1 DAY
409cfs 124.9% vs avg
Optimal band: 365–493 cfs
PERIOD HIGH
446cfs
PERIOD LOW
409cfs
RUNNABLE
100%
last 1 day in band

Gauge Height

7.56ft
Precipitation History
Your History · Big Sioux R nr Castlewood, SD

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Weather Conditions
WEATHER CONDITIONS
TODAY
90°
67°
MON
92°
68°
TUE
96°
64°
WED
100°
65°
THU
101°
67°
FRI
104°
72°
SAT
109°
74°
TIME
MON
3
NOW
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
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
TEMP
hourly forecast
70°
mild
70°
69°
69°
68°
69°
75°
79°
82°
85°
87°
89°
91°
92°
92°
92°
92°
89°
86°
81°
77°
75°
73°
70°
69°
67°
66°
65°
64°
66°
73°
79°
83°
86°
89°
91°
93°
94°
94°
95°
96°
95°
90°
84°
80°
79°
77°
72°
70°
69°
68°
66°
65°
67°
73°
80°
85°
90°
94°
96°
99°
99°
100°
99°
98°
96°
91°
84°
80°
79°
77°
74°
71°
70°
68°
68°
67°
69°
76°
83°
88°
92°
95°
97°
99°
100°
101°
101°
100°
99°
95°
91°
87°
85°
82°
81°
79°
77°
76°
74°
72°
73°
79°
85°
90°
94°
98°
100°
102°
103°
104°
104°
104°
103°
98°
WIND
mph · gust · dir
7mph S
G 16 mph
7
G16
S
7
G16
S
7
G16
S
6
G16
S
6
G17
S
12
G29
SSW
14
G26
SSW
14
G24
SW
15
G22
SSW
15
G21
SSW
15
G21
SSW
15
G20
SSW
14
G20
SSW
14
G19
SSW
14
G20
SSW
13
G18
SSW
12
G20
SSW
10
G21
S
8
G17
S
8
G18
S
7
G17
S
7
G19
S
6
G16
SSE
7
G16
SSE
5
G15
SSE
6
G14
SSE
6
G13
SSE
6
G13
SSE
5
G13
SSE
7
G22
SSW
10
G19
SW
10
G18
SW
11
G15
SW
11
G14
SW
10
G14
SW
10
G12
SW
10
G15
SW
10
G13
SW
10
G12
SSW
10
G11
SSW
10
G12
S
9
G15
S
10
G19
SSE
11
G29
SSE
14
G32
SSE
12
G31
S
9
G29
S
8
G26
S
7
G15
S
7
G17
S
7
G17
S
7
G16
S
8
G20
SSW
9
G18
SSW
9
G13
SW
8
G12
SW
8
G9
SW
7
G9
SSW
8
G10
S
9
G10
S
11
S
12
S
13
S
13
S
11
G13
S
10
G18
SSE
10
G23
SSE
11
G28
SSE
12
G32
SSE
13
G32
SSE
9
G28
S
8
G29
S
8
G28
S
8
G22
S
8
G24
S
8
G22
S
7
G23
SSE
10
G20
S
12
G18
SSW
12
G15
SSW
12
G13
SSW
12
SSW
12
S
13
S
13
S
13
S
14
S
13
G14
S
12
G14
S
13
G20
S
14
G27
SSE
16
G32
SSE
17
G35
S
16
G35
S
15
G37
S
15
G36
S
13
G34
S
12
G32
S
11
G28
S
10
G28
S
10
G26
S
12
G22
SSW
13
G20
SSW
13
G17
SW
12
G15
SW
13
G14
SW
12
SW
12
SSW
13
SSW
13
SSW
12
SSW
11
SSW
9
G12
SSW
9
G12
SSW
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%
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%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
2%
2%
2%
2%
2%
2%
5%
CLOUDS
cover %
0%
clear
0%
0%
0%
1%
0%
0%
0%
1%
0%
0%
0%
0%
0%
0%
0%
0%
4%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
3%
4%
0%
0%
0%
0%
0%
6%
5%
0%
5%
5%
5%
6%
0%
0%
0%
5%
0%
6%
6%
6%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
5%
5%
5%
0%
0%
5%
5%
7%
5%
0%
5%
0%
0%
6%
5%
10%
5%
0%
0%
0%
5%
0%
0%
0%
5%
6%
5%
4%
5%
11%
20%
27%
32%
PRESSURE
hPa · trend
959
959962961959959961962957959960957955957957955953956955952
TemperatureWind / GustsPrecipitationCloud coverPressure
Nowscroll →
FISH INDEX
81
Temperature
Warm
Wind
Light
Pressure
Stable
Moon Phase
Peak Activity
DAYLIGHT
SUNRISE
05:54 AM
SUNSET
09:13 PM
15H 19M OF DAYLIGHT
MOON PHASE
New Moon
3% illuminated
PEAK ACTIVITY

Station Location

44.7316, -97.0446
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-13 02:45 UTC
Site #06479525·USGS

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