USGS · 04133501

THUNDER BAY RIVER

USGS · 04133501LIVE

THUNDER BAY RIVER AT HERRON ROAD NEAR BOLTON, MI

LONG RAPIDS TOWNSHIP, MI45.1242°N, -83.6355°W Updated 24 min ago

FLOW RATE

515cfs

GAUGE HT

12.20ft

AIR TEMP

60°F

WIND

4mph S

FISH INDEX

88SCORE / 100

EPIC · 5 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 DAY

515cfs 45.0% vs avg

Optimal band: 465–629 cfs

PERIOD HIGH

570cfs

PERIOD LOW

515cfs

RUNNABLE

100%

last 1 day in band

Gauge Height

12.20ft

Precipitation History

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Weather Conditions

WEATHER CONDITIONS

TODAY

90°

58°

THU

74°

64°

FRI

80°

55°

SAT

83°

59°

SUN

88°

61°

MON

92°

65°

TUE

83°

70°

TIME

WED

NOW

THU

FRI

SAT

SUN

MON

TEMP

hourly forecast

67°

mild

67°

73°

78°

83°

85°

87°

88°

89°

90°

88°

86°

83°

76°

74°

72°

71°

70°

69°

68°

69°

70°

68°

69°

72°

74°

71°

70°

73°

71°

68°

65°

64°

63°

61°

60°

58°

56°

55°

57°

62°

66°

71°

75°

76°

78°

79°

80°

79°

78°

77°

73°

67°

64°

62°

61°

60°

59°

61°

66°

70°

74°

78°

80°

82°

83°

82°

80°

78°

71°

70°

68°

65°

63°

62°

61°

62°

64°

65°

66°

75°

79°

82°

84°

86°

88°

87°

82°

79°

77°

74°

72°

69°

68°

67°

WIND

mph · gust · dir

5mph SW

G 12 mph

G12

G15

WSW

G13

WSW

G10

G11

WSW

G10

G11

G14

G13

G11

NNW

G18

NNW

G13

G12

WSW

SSE

ESE

WSW

G10

NNE

SSW

NNW

NNE

ENE

ESE

G11

ESE

WNW

SSW

ENE

ESE

G12

ESE

G14

ESE

G13

G12

G11

SSE

G10

SSW

G10

SSW

G13

SSW

G14

SSW

G13

G12

WSW

G11

WSW

G10

WSW

G11

WSW

G11

G10

WNW

NNW

ENE

WNW

WSW

PRECIP

chance %

10%

14%

12%

17%

16%

20%

25%

22%

23%

20%

21%

24%

29%

24%

25%

26%

28%

43%

41%

26%

23%

18%

38%

13%

10%

CLOUDS

cover %

clear

60%

100%

96%

100%

36%

100%

11%

100%

14%

13%

11%

10%

20%

14%

13%

25%

17%

100%

85%

13%

73%

19%

100%

53%

100%

26%

11%

36%

41%

11%

38%

PRESSURE

hPa · trend

990

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Ideal

Wind

Calm

Pressure

Stable

Moon Phase

Good

DAYLIGHT

SUNRISE

05:56 AM

SUNSET

09:23 PM

15H 27M OF DAYLIGHT

MOON PHASE

Last Quarter

40% illuminated

Station Location

45.1242, -83.6355

Loading map…

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

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