USGS · 06479500

BIG SIOUX RIVER

USGS · 06479500LIVE

Big Sioux R ab Watertown, SD

RAUVILLE TOWNSHIP, SD45.0061°N, -97.1644°W Updated 9 hr ago

FLOW RATE

226cfs

GAUGE HT

7.50ft

AIR TEMP

68°F

WIND

7mph S

FISH INDEX

63SCORE / 100

GOOD · 3 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

226cfs 50.6% vs avg

Optimal band: 81–109 cfs

PERIOD HIGH

490cfs

PERIOD LOW

2cfs

RUNNABLE

16%

last 1 year in band

Gauge Height

7.50ft

Precipitation History

Your History · Big Sioux R ab Watertown, SD

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Weather Conditions

WEATHER CONDITIONS

TODAY

92°

68°

MON

92°

67°

TUE

96°

66°

WED

97°

66°

THU

100°

68°

FRI

89°

64°

SAT

90°

65°

TIME

SUN

NOW

MON

TUE

WED

THU

FRI

TEMP

hourly forecast

81°

mild

81°

84°

86°

89°

90°

92°

91°

89°

86°

81°

77°

75°

74°

72°

71°

70°

69°

68°

67°

68°

74°

79°

83°

86°

87°

89°

90°

91°

92°

91°

89°

85°

80°

77°

75°

74°

72°

71°

69°

66°

67°

72°

77°

82°

86°

90°

93°

95°

96°

95°

91°

85°

80°

81°

78°

74°

73°

72°

70°

67°

66°

67°

72°

77°

82°

87°

90°

92°

94°

95°

97°

96°

92°

84°

82°

80°

79°

76°

74°

73°

72°

71°

68°

69°

73°

78°

84°

90°

93°

96°

98°

99°

100°

96°

93°

90°

87°

85°

82°

80°

75°

71°

WIND

mph · gust · dir

13mph SW

G 22 mph

G22

G19

G17

SSW

G16

SSW

G16

SSW

G16

SSW

G17

SSW

G17

SSW

G17

SSW

G18

SSW

G19

SSW

G15

G17

G19

SSW

G17

G19

G20

SSW

G19

SSW

G17

SSW

G16

SSW

G27

SSW

G26

G25

G24

SSW

G24

SSW

G22

SSW

G22

SSW

G20

SSW

G21

SSW

G19

SSW

G19

SSW

G20

G21

G16

G20

G22

G27

G33

G38

SSW

G35

SSW

G33

SSW

G30

SSW

G28

SSW

G29

SSW

G26

SSW

G21

G17

G15

G13

G11

SSW

G11

G12

G13

SSE

G16

SSE

G18

G23

G30

SSE

G31

G32

G33

SSW

G33

G31

G28

SSW

G24

SSW

G23

SSW

G20

SSW

G15

SSW

G13

SSW

G11

SSW

SSE

G11

SSE

G12

SSE

G12

SSE

G13

SSE

G13

SSE

G17

SSE

G20

G29

SSE

G33

SSE

G36

SSE

G34

G35

G33

G31

G26

G25

G24

SSW

G19

SSW

G17

SSW

G17

SSW

G18

SSW

G18

SSW

G17

SSW

G16

SSW

G16

SSW

G16

G15

G14

SSE

G22

G32

G37

G30

SSW

G17

SSW

G12

WNW

PRECIP

chance %

CLOUDS

cover %

clear

93%

100%

94%

53%

70%

100%

75%

32%

28%

82%

63%

100%

10%

11%

12%

100%

40%

100%

31%

35%

10%

86%

61%

100%

13%

12%

11%

15%

100%

94%

73%

55%

43%

34%

28%

29%

35%

PRESSURE

hPa · trend

960

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Warm

Wind

Light

Pressure

Rising — Slow

Moon Phase

Average

DAYLIGHT

SUNRISE

05:54 AM

SUNSET

09:14 PM

15H 20M OF DAYLIGHT

MOON PHASE

Waning Crescent

6% illuminated

Station Location

45.0061, -97.1644

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DATA · USGS · NOAA · NWSUPDATED 2026-07-12 00:00 UTC

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