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
66°F
WIND
7mph NW
FISH INDEX
75SCORE / 100
GREAT · 4 OF 5
Flow Rate Historical Avg
MEDIAN FLOW RATE · 1 YEAR
—cfs
No flow data available
Precipitation History
SPONSORED
Weather Conditions
WEATHER CONDITIONS
TODAY
82°
58°
THU
89°
61°
FRI
92°
67°
SAT
82°
68°
SUN
84°
70°
MON
86°
70°
TUE
95°
66°
TIME
WED
1
NOW
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
7
am
TEMP
hourly forecast
76°
mild
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°
72°
72°
70°
70°
68°
67°
67°
67°
70°
75°
80°
82°
84°
88°
90°
92°
92°
78°
72°
71°
70°
70°
70°
70°
70°
70°
70°
69°
69°
68°
68°
68°
69°
72°
75°
79°
79°
77°
82°
80°
79°
78°
78°
75°
74°
72°
72°
71°
71°
70°
70°
70°
70°
70°
70°
70°
71°
72°
73°
74°
75°
80°
79°
79°
81°
84°
83°
81°
77°
73°
72°
71°
71°
70°
70°
70°
70°
70°
70°
70°
WIND
mph · gust · dir
7mph NW
G 11 mph
7
G11
NW
7
G10
NW
6
G10
NW
5
G9
NW
3
G7
NW
2
G6
W
3
G5
SW
4
G6
SE
6
G9
SE
6
G10
SE
6
G11
SE
6
G12
SSE
3
G4
WSW
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
6
E
5
SSW
5
S
4
SW
2
WSW
4
SSW
3
WSW
3
WSW
3
WNW
5
NNW
6
N
5
N
5
N
4
NNE
3
G4
NNE
3
G5
E
6
G12
ESE
18
NNW
8
G27
NNE
7
G23
N
10
G20
NE
5
G7
NNE
4
G11
ENE
2
G7
ESE
2
G5
E
2
ESE
2
G3
SSE
3
SSE
2
G7
SSW
2
G8
SW
2
G9
S
2
G6
SE
2
G8
SW
4
G7
SSW
5
G7
SSW
6
SW
7
SW
6
G7
SW
4
G9
SW
5
G8
WSW
4
G8
WSW
3
G7
WSW
3
G7
W
3
G6
NW
3
G4
NNW
3
G5
N
2
G7
N
1
G9
NNW
1
G11
WNW
2
G12
N
3
G9
N
3
G10
NNW
3
G9
NNW
3
G9
N
4
G9
NNE
4
G12
N
4
G11
NNE
4
G10
NNE
5
G9
NNE
4
G8
NNE
3
G8
N
3
G7
NNW
4
G7
NNW
4
G7
NNE
5
G7
NNE
4
G11
NNE
5
G10
NNE
5
G10
NE
3
G14
ENE
3
G12
ESE
3
G8
ESE
3
G5
ESE
3
G4
ESE
3
E
3
ENE
3
ENE
3
NE
4
NE
4
NE
4
NE
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%
1%
1%
2%
2%
3%
4%
5%
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%
7%
CLOUDS
cover %
0%
clear
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%
100%
17%
100%
100%
100%
100%
67%
17%
66%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
71%
100%
100%
100%
100%
100%
96%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
47%
38%
40%
28%
44%
78%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
31%
56%
61%
13%
11%
0%
8%
5%
6%
8%
30%
61%
85%
95%
98%
PRESSURE
hPa · trend
1006
10061005100510051004100310041004100510031004100210021001100310041004100510071009
TemperatureWind / GustsPrecipitationCloud coverPressure
Nowscroll →
FISH INDEX
75
Temperature
Ideal
Wind
Light
Pressure
Stable
Moon Phase
Average
DAYLIGHT
SUNRISE
05:45 AM
SUNSET
08:38 PM
14H 53M OF DAYLIGHT7H 55M REMAINING
MOON PHASE
Waxing Gibbous
70% illuminated

Station Location

38.8682, -77.4078
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-06-24 12:43 UTC
Site #0165694286·USGS

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