USGS · 01645762

S F LITTLE DIFFICULT RUN

USGS · 01645762LIVE

S F LITTLE DIFFICULT RUN ABOVE MOUTH NR VIENNA, VA

RESTON, VA38.9089°N, -77.3383°W Updated 14 min ago

FLOW RATE

0.29cfs

GAUGE HT

0.14ft

WATER TEMP

26°F

AIR TEMP

81°F

WIND

7mph NE

FISH INDEX

56SCORE / 100

GOOD · 3 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 DAY

0.29cfs 89.0% vs avg

Optimal band: 0–0 cfs

PERIOD HIGH

0.34cfs

PERIOD LOW

0.29cfs

RUNNABLE

last 1 day in band

Gauge Height

0.14ft

Water Temperature

26.3°F

Water Turbidity

Precipitation History

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Weather Conditions

WEATHER CONDITIONS

TODAY

87°

72°

TUE

82°

72°

WED

79°

72°

THU

92°

70°

FRI

88°

70°

SAT

87°

70°

SUN

82°

64°

TIME

TUE

NOW

WED

THU

FRI

SAT

TEMP

hourly forecast

75°

mild

75°

74°

73°

72°

73°

74°

76°

78°

81°

82°

81°

82°

81°

80°

78°

77°

76°

75°

76°

75°

74°

73°

72°

73°

74°

73°

76°

79°

76°

75°

74°

73°

72°

71°

70°

72°

74°

76°

78°

82°

87°

89°

92°

91°

74°

75°

74°

73°

72°

71°

70°

71°

75°

79°

82°

84°

85°

88°

82°

81°

82°

76°

75°

76°

74°

73°

72°

71°

70°

71°

74°

77°

79°

83°

85°

87°

86°

87°

86°

83°

79°

WIND

mph · gust · dir

6mph ENE

G 16 mph

G16

ENE

G17

ENE

G10

ENE

G11

NNE

G10

ENE

ESE

WNW

NNE

ESE

NNW

G15

ENE

G13

ENE

G11

ENE

G10

G13

ENE

G12

ENE

ESE

SSE

SSW

SSE

G13

G14

SSE

G10

SSE

G14

G17

G16

G15

G13

G12

SSW

G12

SSW

G11

SSW

G10

G12

WSW

G16

G24

G15

SSE

G11

G16

G17

G16

WSW

G12

G11

G14

G11

G15

G11

WNW

G19

G22

G20

WNW

G20

WNW

G19

G16

WNW

G17

WNW

G14

WNW

G13

WNW

G11

WNW

G11

G10

NNW

G10

NNW

G12

G14

NNW

G14

NNW

G11

NNW

G10

G11

G10

PRECIP

chance %

37%

41%

26%

21%

10%

16%

21%

26%

24%

27%

29%

30%

29%

22%

16%

11%

19%

20%

18%

19%

14%

10%

34%

37%

13%

20%

40%

23%

69%

25%

43%

19%

15%

21%

36%

CLOUDS

cover %

100%

overcast

100%

94%

100%

57%

73%

100%

50%

100%

82%

14%

100%

86%

100%

78%

100%

96%

98%

88%

100%

97%

71%

100%

69%

64%

86%

92%

100%

96%

21%

24%

94%

78%

100%

23%

14%

100%

14%

99%

100%

27%

100%

64%

100%

64%

78%

100%

PRESSURE

hPa · trend

1002

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Too Hot

Wind

Light

Pressure

Rising — Slow

Moon Phase

Good

DAYLIGHT

SUNRISE

05:50 AM

SUNSET

08:37 PM

14H 47M OF DAYLIGHT

MOON PHASE

Last Quarter

54% illuminated

Station Location

38.9089, -77.3383

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DATA · USGS · NOAA · NWSUPDATED 2026-07-07 00:20 UTC

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