USGS · 06479215

BIG SIOUX RIVER

USGS · 06479215LIVE

Big Sioux R nr Florence, SD

GRANT COUNTY, SD45.1808°N, -97.1866°W Updated 15 hr ago

FLOW RATE

0cfs

AIR TEMP

62°F

WIND

15mph WNW

FISH INDEX

69SCORE / 100

GREAT · 4 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 YEAR

0cfs 33.9% vs avg

Optimal band: 14–18 cfs

PERIOD HIGH

475cfs

PERIOD LOW

1cfs

RUNNABLE

11%

last 1 year in band

Precipitation History

SPONSORED

Weather Conditions

WEATHER CONDITIONS

TODAY

70°

54°

THU

72°

50°

FRI

77°

55°

SAT

84°

60°

SUN

102°

70°

MON

99°

73°

TUE

88°

64°

TIME

WED

NOW

THU

FRI

SAT

SUN

MON

TEMP

hourly forecast

69°

mild

69°

70°

68°

67°

63°

60°

58°

57°

56°

55°

53°

52°

51°

50°

53°

58°

62°

64°

66°

68°

70°

71°

72°

70°

68°

64°

63°

62°

60°

59°

58°

57°

56°

55°

57°

62°

66°

64°

66°

68°

72°

76°

77°

75°

73°

72°

71°

70°

67°

68°

66°

63°

62°

61°

60°

61°

63°

66°

70°

74°

77°

80°

82°

84°

83°

81°

79°

75°

73°

71°

70°

71°

72°

74°

78°

82°

86°

90°

93°

95°

98°

100°

102°

99°

92°

87°

82°

84°

83°

82°

81°

79°

78°

77°

79°

83°

WIND

mph · gust · dir

16mph NW

G 20 mph

G20

G21

G19

G17

G11

NNW

G11

NNW

G13

NNW

G12

G11

NNW

WNW

G12

WNW

G13

G14

G13

G11

NNW

ENE

G13

ESE

G13

G12

ESE

G13

G14

G17

G15

G16

G15

SSE

G15

G17

SSE

G18

SSE

G17

SSE

G21

G23

G26

ESE

G27

ESE

G28

G30

G33

G34

SSE

G36

SSE

G34

SSE

G33

SSE

G34

SSE

G34

SSE

G34

SSE

G33

SSE

G30

SSE

G27

SSE

G29

SSE

G28

SSE

G29

SSE

G29

SSE

G29

SSE

G28

SSE

G27

SSE

G26

SSE

G29

G34

G36

G32

G30

G28

G33

G31

G33

G30

G28

G27

SSE

G27

SSE

G25

SSE

G25

G24

G23

SSW

G22

SSW

G24

SSW

G26

SSW

G25

SSW

G18

WSW

SSE

G13

SSW

G17

G31

G35

G36

G35

G36

G35

G33

G30

PRECIP

chance %

15%

27%

59%

54%

14%

17%

CLOUDS

cover %

20%

few

20%

21%

22%

12%

13%

23%

25%

76%

100%

28%

19%

34%

29%

22%

42%

100%

79%

97%

100%

52%

23%

100%

82%

67%

100%

80%

100%

26%

100%

89%

24%

44%

66%

100%

97%

69%

33%

86%

100%

96%

95%

100%

83%

100%

88%

28%

PRESSURE

hPa · trend

954

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Ideal

Wind

Moderate

Pressure

Stable

Moon Phase

Average

DAYLIGHT

SUNRISE

05:42 AM

SUNSET

09:20 PM

15H 38M OF DAYLIGHT5H 53M REMAINING

MOON PHASE

Waxing Gibbous

71% illuminated

Station Location

45.1808, -97.1866

Loading map…

DATA · USGS · NOAA · NWSUPDATED 2026-06-24 15:27 UTC

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