Waterlands
Big Rocky Run
USGS · 0165694286
BIG ROCKY RUN
USGS · 0165694286LIVE

BIG ROCKY RUN AT STRINGFELLOW RD NR CHANTILLY, VA

RESTON, VA38.8682°N, -77.4078°W
AIR TEMP
61°F
WIND
5mph NW
FISH INDEX
81SCORE / 100
GREAT · 4 OF 5
Flow Rate Historical Avg
MEDIAN FLOW RATE · 1 DAY
—cfs
No flow data available
Precipitation History
SPONSORED
Weather Conditions
WEATHER CONDITIONS
TODAY
82°
58°
THU
89°
61°
FRI
88°
65°
SAT
80°
67°
SUN
85°
65°
MON
89°
66°
TUE
93°
63°
TIME
WED
11
NOW
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
THU
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
FRI
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
SAT
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
SUN
12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
MON
12
am
1
am
2
am
3
am
4
am
5
am
6
am
TEMP
hourly forecast
73°
mild
73°
75°
76°
78°
80°
81°
82°
81°
80°
75°
71°
69°
67°
66°
64°
64°
63°
63°
62°
61°
64°
68°
72°
76°
79°
82°
86°
88°
89°
89°
89°
88°
86°
81°
78°
75°
73°
71°
70°
68°
67°
66°
66°
65°
67°
70°
75°
77°
81°
82°
83°
88°
84°
88°
79°
71°
68°
68°
69°
69°
69°
68°
68°
68°
67°
67°
67°
68°
68°
69°
71°
74°
77°
78°
78°
80°
80°
79°
79°
77°
76°
74°
72°
71°
70°
70°
69°
68°
67°
66°
66°
65°
66°
68°
71°
75°
79°
80°
83°
85°
85°
82°
79°
79°
77°
77°
75°
72°
70°
69°
68°
67°
66°
66°
66°
67°
WIND
mph · gust · dir
7mph NW
G 11 mph
7
G11
NW
7
G12
NW
6
G11
NW
7
G9
NW
5
G9
NW
4
G7
NW
5
G8
WNW
4
G7
NW
3
G6
SW
4
G5
SE
6
G10
SE
6
G11
SE
6
G11
SSE
6
G11
SSE
2
G4
W
1
G4
S
6
G7
S
6
G10
SSE
6
G12
SSE
6
G11
SSE
7
G12
S
8
G20
S
8
G22
SSW
9
G21
SSW
9
G18
SSW
11
G16
S
10
G15
SSW
11
G15
SSW
9
G16
S
11
G17
S
10
G17
S
11
G17
S
8
G15
SSE
8
G16
SE
15
G24
SE
12
G22
SE
4
NNW
5
SE
3
G5
W
2
G3
WNW
3
WNW
3
NW
3
NNW
3
NW
2
WNW
2
G3
NW
3
G4
NNW
4
N
4
NNE
3
NE
1
G2
ENE
2
G4
SSE
3
G5
SE
6
G12
S
15
NNW
15
G27
N
10
G23
NNE
8
G20
NE
3
G7
ESE
4
G11
ESE
3
G7
SSE
3
G5
S
2
SSE
2
G3
E
2
G3
SW
3
G7
S
4
G8
S
3
G9
S
2
G6
SSE
3
G8
SW
3
G7
SW
4
G7
SW
4
G5
SW
4
G5
SW
4
G7
WSW
5
G9
W
5
G8
WNW
5
G8
WNW
4
G7
NW
4
G7
NNW
3
G6
N
4
N
4
G5
N
4
G7
N
5
G9
N
5
G11
N
5
G12
N
4
G9
N
4
G10
N
4
G9
N
4
G9
N
4
G9
N
4
G12
N
6
G11
N
5
G10
N
5
G9
NNE
6
G8
NNE
6
G8
NNE
6
G7
NNE
6
G7
NNE
6
G7
NNE
6
G7
NNE
4
G11
NE
3
G10
ENE
4
G10
E
5
G14
E
5
G12
ESE
4
G8
SE
4
G5
SSE
4
SSE
3
S
3
SSW
2
SSW
2
SSW
1
S
1
SE
PRECIP
chance %
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
1%
2%
2%
3%
4%
0%
0%
7%
7%
7%
7%
7%
7%
4%
4%
4%
4%
4%
4%
6%
6%
6%
6%
6%
6%
55%
55%
55%
55%
55%
55%
67%
67%
67%
67%
67%
67%
64%
64%
64%
64%
64%
64%
58%
58%
58%
58%
58%
58%
53%
53%
53%
53%
53%
53%
31%
31%
31%
31%
31%
31%
9%
9%
9%
9%
9%
9%
6%
6%
6%
6%
6%
6%
6%
6%
6%
6%
6%
6%
5%
5%
5%
5%
5%
5%
7%
7%
7%
7%
CLOUDS
cover %
0%
clear
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
0%
5%
1%
100%
100%
100%
100%
10%
0%
0%
0%
14%
0%
20%
100%
86%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
47%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
95%
100%
100%
100%
100%
100%
100%
100%
100%
100%
10%
6%
66%
27%
49%
34%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
94%
100%
100%
100%
100%
100%
100%
72%
33%
4%
0%
0%
2%
4%
8%
10%
10%
PRESSURE
hPa · trend
1006
10061004100510051006100310041003100410021004100210031001100310031005100410071008
TemperatureWind / GustsPrecipitationCloud coverPressure
Nowscroll →
FISH INDEX
81
Temperature
Ideal
Wind
Light
Pressure
Stable
Moon Phase
Good
DAYLIGHT
SUNRISE
05:45 AM
SUNSET
08:38 PM
14H 53M OF DAYLIGHT9H 17M REMAINING
MOON PHASE
First Quarter
69% illuminated

Station Location

38.8682, -77.4078
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-24 11:21 UTC
Site #0165694286·USGS

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