Tuolumne R A Grand Cyn of Tuolumne Ab Hetch Hetchy River

USGS · 11274790

TUOLUMNE R A GRAND CYN OF TUOLUMNE AB HETCH HETCHY RIVER

USGS · 11274790LIVE

TUOLUMNE R A GRAND CYN OF TUOLUMNE AB HETCH HETCHY

TUOLUMNE COUNTY, CA37.9166°N, -119.6599°W Updated 20 min ago

FLOW RATE

178cfs

GAUGE HT

8.58ft

WATER TEMP

17°F

AIR TEMP

85°F

WIND

11mph NW

FISH INDEX

56SCORE / 100

GOOD · 3 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 DAY

178cfs 81.0% vs avg

Optimal band: 160–216 cfs

PERIOD HIGH

213cfs

PERIOD LOW

168cfs

RUNNABLE

100%

last 1 day in band

Gauge Height

8.58ft

Water Temperature

17.3°F

Precipitation History

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Weather Conditions

WEATHER CONDITIONS

TODAY

90°

66°

THU

90°

70°

FRI

93°

67°

SAT

95°

69°

SUN

93°

73°

MON

94°

73°

TUE

93°

68°

TIME

WED

NOW

THU

FRI

SAT

SUN

MON

TEMP

hourly forecast

85°

mild

85°

82°

78°

74°

72°

74°

73°

72°

71°

70°

71°

78°

82°

85°

86°

88°

89°

90°

89°

88°

86°

84°

80°

75°

74°

72°

73°

75°

74°

72°

70°

68°

67°

71°

82°

86°

88°

90°

92°

93°

92°

91°

88°

85°

73°

70°

69°

70°

74°

85°

88°

90°

92°

93°

95°

93°

92°

90°

88°

84°

75°

74°

73°

74°

75°

83°

87°

89°

91°

92°

93°

91°

92°

90°

88°

85°

77°

74°

75°

76°

75°

76°

75°

76°

78°

82°

WIND

mph · gust · dir

11mph NW

G 13 mph

G13

G12

WNW

ESE

WSW

WNW

G11

G14

G15

G14

WNW

G13

WNW

G14

WNW

G14

WNW

G13

WNW

G11

WNW

G10

WNW

NNW

ENE

ESE

NNE

SSW

ENE

WSW

G11

WSW

G13

WSW

G13

WSW

G13

WSW

G11

WSW

G10

WSW

ESE

ENE

ESE

WSW

G14

WSW

G11

WSW

ENE

WSW

G13

WSW

G16

WSW

G13

WSW

G11

WSW

ENE

NNE

PRECIP

chance %

CLOUDS

cover %

clear

43%

10%

80%

55%

100%

17%

100%

80%

PRESSURE

hPa · trend

887

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Too Hot

Wind

Moderate

Pressure

Stable

Moon Phase

Good

DAYLIGHT

SUNRISE

05:43 AM

SUNSET

08:23 PM

14H 40M OF DAYLIGHT

MOON PHASE

Last Quarter

36% illuminated

Station Location

37.9166, -119.6599

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DATA · USGS · NOAA · NWSUPDATED 2026-07-08 17:30 UTC

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