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 10 min ago
FLOW RATE
441cfs
GAUGE HT
7.77ft
AIR TEMP
68°F
WIND
6mph SSE
FISH INDEX
63SCORE / 100
GOOD · 3 OF 5
Flow Rate Historical Avg
MEDIAN FLOW RATE · 1 DAY
441cfs 106.6% vs avg
Optimal band: 384–520 cfs
PERIOD HIGH
483cfs
PERIOD LOW
441cfs
RUNNABLE
100%
last 1 day in band

Gauge Height

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

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Weather Conditions
WEATHER CONDITIONS
TODAY
92°
66°
MON
92°
66°
TUE
97°
64°
WED
97°
65°
THU
102°
67°
FRI
89°
66°
SAT
91°
65°
TIME
SUN
9
NOW
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
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
TEMP
hourly forecast
78°
mild
78°
81°
84°
87°
89°
91°
92°
92°
92°
92°
90°
86°
81°
77°
75°
73°
72°
70°
69°
68°
67°
66°
67°
74°
79°
83°
86°
88°
90°
91°
92°
92°
92°
91°
89°
85°
80°
76°
75°
74°
72°
71°
69°
68°
67°
64°
66°
72°
77°
82°
86°
89°
92°
95°
97°
97°
96°
95°
92°
86°
80°
81°
78°
74°
73°
72°
70°
67°
65°
65°
67°
72°
78°
83°
87°
91°
94°
96°
97°
97°
97°
96°
93°
86°
82°
81°
79°
77°
74°
74°
73°
71°
69°
67°
68°
74°
79°
85°
90°
94°
97°
99°
100°
101°
102°
101°
98°
95°
90°
87°
85°
85°
84°
81°
WIND
mph · gust · dir
12mph SW
G 23 mph
12
G23
SW
12
G20
SW
12
G17
SW
12
G16
SSW
12
G15
SSW
12
G15
SSW
12
G15
S
12
G15
SSW
12
G16
SSW
11
G15
SSW
11
G17
S
8
G18
S
6
G13
S
6
G15
S
6
G14
SSE
6
G16
S
6
G17
S
5
G17
S
6
G16
SSE
6
G16
SSE
6
G15
SSE
6
G14
SSE
5
G15
S
8
G25
SSW
12
G24
SW
13
G22
SW
14
G21
SSW
15
G21
SSW
16
G21
SSW
15
G21
SSW
15
G20
SSW
14
G19
SSW
13
G18
SSW
13
G18
S
12
G19
S
9
G21
S
7
G15
S
7
G15
SSE
10
G22
S
10
G26
S
11
G32
S
12
G36
S
11
G35
S
11
G33
S
10
G31
S
8
G27
S
8
G28
SSW
10
G27
SSW
12
G21
SW
12
G18
SW
11
G15
SW
10
G13
SW
9
G12
SW
8
G11
SW
9
G11
SSW
11
G12
S
12
G13
S
10
G12
S
8
G14
S
9
G19
SE
12
G29
SE
14
G32
SSE
13
G32
SSE
12
G31
S
12
G33
S
11
G33
S
10
G31
S
9
G27
S
8
G25
S
8
G22
S
7
G23
S
9
G20
SSW
10
G17
SSW
10
G15
SSW
11
G14
SW
9
G10
SSW
7
G8
SSW
8
G9
S
10
G11
S
11
S
11
G12
S
11
G13
S
11
G17
SSE
12
G24
SE
12
G29
SSE
14
G32
SSE
14
G34
SSE
13
G31
S
12
G34
S
12
G34
S
12
G33
S
12
G31
S
9
G30
S
8
G22
S
8
G24
S
11
G22
S
11
G19
SSW
11
G16
SSW
12
G17
SSW
13
G17
SSW
14
G16
SSW
15
G16
SSW
14
G16
SSW
13
G16
SSW
12
G16
SSW
10
G15
SSW
7
G11
SSW
8
G16
S
10
G25
S
12
G30
S
13
G32
S
13
G31
SSW
13
G29
SSW
11
G24
SW
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%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
0%
0%
0%
0%
0%
0%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
0%
0%
0%
0%
0%
0%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
1%
CLOUDS
cover %
2%
clear
2%
3%
2%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
0%
59%
0%
0%
0%
39%
97%
12%
87%
100%
100%
86%
96%
87%
100%
56%
0%
14%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
5%
5%
71%
7%
100%
94%
6%
55%
6%
5%
0%
1%
0%
0%
0%
0%
0%
5%
5%
0%
10%
10%
5%
34%
100%
100%
100%
11%
10%
50%
6%
5%
6%
12%
10%
11%
91%
100%
77%
13%
10%
0%
5%
5%
17%
100%
100%
100%
93%
72%
59%
67%
82%
88%
72%
PRESSURE
hPa · trend
962
962962960960962962959960961959957959959957954956955952950
TemperatureWind / GustsPrecipitationCloud coverPressure
Nowscroll →
FISH INDEX
63
Temperature
Warm
Wind
Light
Pressure
Rising — Slow
Moon Phase
Average
DAYLIGHT
SUNRISE
05:54 AM
SUNSET
09:13 PM
15H 19M OF DAYLIGHT
MOON PHASE
Waning Crescent
6% illuminated

Station Location

44.7316, -97.0446
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-12 08:45 UTC
Site #06479525·USGS

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