USGS · 01656903

FLATLICK BRANCH

USGS · 01656903LIVE

FLATLICK BRANCH ABOVE FROG BRANCH AT CHANTILLY, VA

RESTON, VA38.8824°N, -77.4319°W Updated 8 hr ago

FLOW RATE

145cfs

GAUGE HT

2.55ft

WATER TEMP

76°F

AIR TEMP

72°F

WIND

4mph NNE

FISH INDEX

69SCORE / 100

GREAT · 4 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 7 DAY

145cfs 233.9% vs avg

Optimal band: 7–9 cfs

PERIOD HIGH

145cfs

PERIOD LOW

1cfs

RUNNABLE

13%

last 7 day in band

Gauge Height

2.55ft

Water Temperature

76.3°F

Precipitation History

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Weather Conditions

WEATHER CONDITIONS

TODAY

82°

70°

MON

83°

66°

TUE

90°

65°

WED

99°

68°

THU

98°

77°

FRI

92°

71°

SAT

92°

68°

TIME

SUN

NOW

MON

TUE

WED

THU

FRI

TEMP

hourly forecast

75°

mild

75°

76°

77°

79°

80°

81°

82°

81°

80°

78°

75°

72°

71°

70°

69°

68°

67°

66°

71°

74°

76°

78°

80°

81°

82°

83°

82°

78°

75°

72°

71°

69°

68°

66°

65°

66°

70°

75°

79°

83°

85°

87°

89°

90°

89°

86°

80°

76°

74°

72°

70°

69°

68°

69°

74°

80°

85°

89°

91°

94°

97°

98°

99°

96°

89°

85°

84°

83°

81°

79°

78°

77°

78°

81°

85°

87°

90°

93°

96°

97°

98°

95°

91°

90°

91°

83°

81°

79°

77°

76°

74°

73°

WIND

mph · gust · dir

8mph NE

G 16 mph

G16

G14

ENE

G13

ENE

G12

ENE

G13

G11

ESE

G10

ESE

G11

ESE

G11

G14

G16

ESE

G18

ESE

G14

G13

G12

G11

SSE

ESE

NNE

ENE

SSE

G10

G11

SSE

G14

SSE

G16

SSE

G15

G11

G10

SSW

WSW

WNW

NNW

SSE

SSW

G11

SSW

G16

SSW

G14

SSW

G11

WSW

G12

WNW

G12

WNW

G13

G11

WNW

G10

WNW

G11

WNW

G11

G10

WNW

G13

G18

G19

G18

G17

WNW

G18

WNW

G17

WNW

G19

NNW

G19

NNW

G20

NNW

G21

NNW

G24

G25

NNW

G24

NNW

G19

NNW

G13

NNW

PRECIP

chance %

13%

11%

15%

11%

10%

11%

CLOUDS

cover %

82%

mostly

82%

100%

99%

100%

97%

86%

59%

90%

59%

57%

100%

95%

100%

20%

25%

100%

78%

100%

26%

90%

100%

81%

100%

12%

22%

84%

88%

100%

13%

34%

73%

100%

92%

82%

75%

PRESSURE

hPa · trend

1011

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Warm

Wind

Calm

Pressure

Rising — Slow

Moon Phase

Average

DAYLIGHT

SUNRISE

05:54 AM

SUNSET

08:35 PM

14H 41M OF DAYLIGHT

MOON PHASE

Waning Crescent

7% illuminated

Station Location

38.8824, -77.4319

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DATA · USGS · NOAA · NWSUPDATED 2026-07-12 00:00 UTC

Site #01656903·USGS

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