USGS · 06111800

BIG SPRING CR

USGS · 06111800LIVE

Big Spring Cr at R&B Trading Post nr Lewistown MT

FERGUS COUNTY, MT47.0878°N, -109.4575°W Updated 52 min ago

FLOW RATE

154cfs

GAUGE HT

3.71ft

AIR TEMP

90°F

WIND

8mph SE

FISH INDEX

56SCORE / 100

GOOD · 3 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 DAY

154cfs 0.1% vs avg

Optimal band: 133–179 cfs

PERIOD HIGH

168cfs

PERIOD LOW

145cfs

RUNNABLE

100%

last 1 day in band

Gauge Height

3.71ft

Precipitation History

Your History · Big Spring Cr at R&B Trading Post nr Lewistown MT

Track your history

Sign in to track your sessions at Big Spring Cr at R&B Trading Post nr Lewistown MT — best days, monthly trends, and time on the water.

SPONSORED

Weather Conditions

WEATHER CONDITIONS

TODAY

104°

56°

MON

96°

63°

TUE

89°

65°

WED

86°

61°

THU

93°

66°

FRI

92°

67°

SAT

94°

70°

TIME

SUN

NOW

MON

TUE

WED

THU

FRI

TEMP

hourly forecast

104°

mild

104°

96°

93°

94°

90°

84°

79°

77°

73°

71°

69°

66°

65°

63°

66°

73°

81°

85°

88°

90°

92°

95°

96°

95°

93°

89°

84°

80°

77°

75°

72°

70°

68°

67°

65°

69°

73°

78°

80°

82°

84°

86°

88°

89°

86°

79°

69°

68°

67°

66°

67°

66°

63°

62°

61°

64°

66°

70°

74°

79°

82°

84°

85°

86°

82°

75°

72°

69°

68°

67°

66°

69°

72°

76°

80°

84°

87°

90°

92°

93°

90°

79°

80°

76°

73°

70°

68°

67°

68°

69°

72°

74°

WIND

mph · gust · dir

11mph SW

G 28 mph

G28

G21

G25

G23

NNW

G20

WNW

G20

NNW

G13

WNW

G12

WSW

SSE

ESE

G11

ESE

G13

G15

G13

SSW

G16

G15

ESE

G16

ESE

G17

ESE

G23

ESE

G15

ESE

G13

ESE

G14

G10

SSE

WSW

SSW

G12

G13

G15

G16

ENE

G19

ESE

G11

ESE

G25

G26

G29

G28

G25

G21

ESE

G10

ESE

G10

ESE

ENE

G12

G17

ESE

NNE

ENE

G16

G15

G10

ESE

G20

NNE

SSE

PRECIP

chance %

17%

49%

41%

36%

49%

46%

21%

38%

45%

CLOUDS

cover %

29%

few

29%

100%

69%

39%

66%

89%

100%

80%

44%

17%

77%

73%

100%

18%

71%

97%

37%

57%

90%

100%

21%

84%

26%

19%

17%

13%

12%

13%

100%

87%

100%

83%

69%

16%

89%

100%

93%

36%

18%

43%

100%

55%

61%

100%

16%

100%

PRESSURE

hPa · trend

883

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Too Hot

Wind

Light

Pressure

Stable

Moon Phase

Average

DAYLIGHT

SUNRISE

05:35 AM

SUNSET

09:11 PM

15H 36M OF DAYLIGHT

MOON PHASE

Waning Crescent

5% illuminated

Station Location

47.0878, -109.4575

Loading map…

DATA · USGS · NOAA · NWSUPDATED 2026-07-12 15:30 UTC

Site #06111800·USGS

Create a free account to save favorites, set flow alerts, and track conditions