USGS · 01656903

FLATLICK BRANCH

USGS · 01656903LIVE

FLATLICK BRANCH ABOVE FROG BRANCH AT CHANTILLY, VA

RESTON, VA38.8824°N, -77.4319°W Updated 16 hr ago

FLOW RATE

85cfs

GAUGE HT

2.09ft

WATER TEMP

76°F

AIR TEMP

79°F

WIND

6mph E

FISH INDEX

63SCORE / 100

GOOD · 3 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 30 DAY

85cfs 30.8% vs avg

Optimal band: 2–2 cfs

PERIOD HIGH

85cfs

PERIOD LOW

1cfs

RUNNABLE

13%

last 30 day in band

Gauge Height

2.09ft

Water Temperature

75.7°F

Precipitation History

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Weather Conditions

WEATHER CONDITIONS

TODAY

79°

72°

MON

81°

67°

TUE

91°

65°

WED

99°

69°

THU

97°

76°

FRI

84°

67°

SAT

82°

62°

TIME

SUN

NOW

MON

TUE

WED

THU

FRI

TEMP

hourly forecast

74°

mild

74°

73°

75°

74°

73°

72°

71°

70°

67°

68°

71°

74°

75°

77°

78°

80°

81°

80°

79°

78°

75°

72°

71°

70°

68°

67°

66°

65°

66°

70°

75°

79°

83°

86°

88°

90°

91°

90°

89°

85°

80°

77°

74°

73°

72°

71°

70°

69°

71°

76°

81°

86°

89°

92°

94°

97°

98°

99°

98°

93°

87°

84°

82°

80°

79°

78°

77°

80°

85°

88°

90°

92°

94°

97°

89°

93°

90°

86°

81°

78°

76°

73°

72°

70°

68°

67°

69°

71°

74°

77°

WIND

mph · gust · dir

4mph NNE

G 14 mph

G14

NNE

G22

G13

SSE

G13

SSE

G12

SSE

ESE

G11

SSE

G10

ENE

ESE

G11

ESE

G10

ESE

SSE

G10

SSE

G11

SSE

G11

SSE

G13

SSW

WSW

SSW

G13

SSW

G15

SSW

G15

G13

WSW

WNW

G10

G12

WNW

G11

G10

WNW

G10

G13

SSW

G11

SSW

WSW

NNW

G13

G17

WNW

G17

G19

G20

NNW

G21

NNW

G20

G22

G23

G26

G28

G31

G29

NNW

G28

NNW

G26

NNW

G24

NNW

G22

NNW

G20

NNW

G20

NNW

G21

NNW

G21

NNW

G19

NNW

G17

NNW

G15

NNW

PRECIP

chance %

25%

28%

25%

13%

CLOUDS

cover %

100%

overcast

100%

88%

98%

100%

11%

33%

97%

100%

94%

100%

54%

92%

12%

11%

95%

100%

10%

11%

100%

31%

82%

21%

100%

35%

20%

100%

98%

16%

84%

20%

11%

23%

87%

38%

100%

53%

100%

86%

58%

33%

18%

PRESSURE

hPa · trend

1010

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Warm

Wind

Light

Pressure

Rising — Slow

Moon Phase

Average

DAYLIGHT

SUNRISE

05:54 AM

SUNSET

08:35 PM

14H 41M OF DAYLIGHT

MOON PHASE

Waning Crescent

5% illuminated

Station Location

38.8824, -77.4319

Loading map…

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

Site #01656903·USGS

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