USGS · 06111800

BIG SPRING CR

USGS · 06111800LIVE

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

MONTANA47.0878°N, -109.4575°W Updated 15 hr ago

FLOW RATE

153cfs

GAUGE HT

3.70ft

AIR TEMP

81°F

WIND

12mph ESE

FISH INDEX

44SCORE / 100

FAIR · 2 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 30 DAY

153cfs 4.3% vs avg

Optimal band: 145–195 cfs

PERIOD HIGH

205cfs

PERIOD LOW

153cfs

RUNNABLE

94%

last 30 day in band

Gauge Height

3.70ft

Precipitation History

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

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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

103°

mild

103°

104°

100°

97°

94°

90°

84°

79°

77°

74°

71°

68°

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°

WIND

mph · gust · dir

13mph SW

G 24 mph

G24

G26

G20

NNW

G26

G27

NNW

G21

G20

NNW

G11

G12

WNW

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 %

70%

mostly

70%

99%

100%

87%

68%

66%

100%

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

884

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Too Hot

Wind

Moderate

Pressure

Rising — Slow

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 00:00 UTC

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