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 45 min ago

FLOW RATE

148cfs

GAUGE HT

3.68ft

AIR TEMP

66°F

WIND

5mph SSE

FISH INDEX

69SCORE / 100

GREAT · 4 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 DAY

148cfs 0.8% vs avg

Optimal band: 135–183 cfs

PERIOD HIGH

168cfs

PERIOD LOW

148cfs

RUNNABLE

100%

last 1 day in band

Gauge Height

3.68ft

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°

62°

MON

97°

65°

TUE

91°

67°

WED

87°

64°

THU

91°

66°

FRI

96°

68°

SAT

97°

70°

TIME

SUN

NOW

MON

TUE

WED

THU

FRI

TEMP

hourly forecast

83°

mild

83°

87°

94°

97°

101°

100°

103°

104°

96°

89°

84°

80°

77°

75°

73°

71°

69°

66°

65°

68°

74°

80°

86°

89°

92°

93°

95°

97°

96°

94°

88°

83°

79°

77°

81°

77°

72°

69°

68°

67°

71°

75°

77°

81°

83°

85°

87°

90°

91°

90°

89°

87°

84°

78°

75°

71°

65°

64°

66°

64°

65°

67°

70°

73°

77°

80°

84°

80°

84°

86°

87°

84°

78°

72°

70°

69°

68°

67°

66°

69°

73°

76°

80°

84°

87°

89°

90°

91°

87°

82°

78°

76°

74°

73°

72°

71°

WIND

mph · gust · dir

15mph SE

G 23 mph

G23

G20

ESE

G12

G18

G21

G23

G24

G34

SSW

G26

G20

G24

NNW

G24

NNW

G15

G16

G10

WSW

ESE

SSE

G10

SSE

G10

G12

WSW

G11

WSW

WNW

G20

G17

NNW

G14

WSW

G14

SSW

G17

SSE

G19

ESE

G14

WNW

NNE

G15

ENE

G11

G15

G14

G13

SSE

G10

SSE

ESE

NNW

WSW

G10

WSW

WNW

ESE

SSE

G11

SSE

SSW

WSW

NNW

NNE

ENE

G13

ENE

G17

ENE

G19

G20

ESE

G20

G16

G11

PRECIP

chance %

19%

58%

41%

31%

43%

45%

10%

24%

39%

10%

CLOUDS

cover %

26%

few

26%

100%

96%

100%

51%

100%

91%

100%

82%

23%

20%

41%

40%

61%

63%

45%

100%

97%

49%

94%

87%

86%

100%

12%

92%

10%

100%

91%

100%

16%

14%

11%

100%

23%

100%

22%

100%

83%

25%

100%

22%

30%

28%

21%

15%

10%

PRESSURE

hPa · trend

883

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Ideal

Wind

Light

Pressure

Rising — Slow

Moon Phase

Average

DAYLIGHT

SUNRISE

05:35 AM

SUNSET

09:11 PM

15H 36M OF DAYLIGHT

MOON PHASE

Waning Crescent

6% illuminated

Station Location

47.0878, -109.4575

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DATA · USGS · NOAA · NWSUPDATED 2026-07-12 08:30 UTC

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