Waterlands
Little Difficult Run
USGS · 01645745
LITTLE DIFFICULT RUN
USGS · 01645745LIVE

LITTLE DIFFICULT RUN NEAR VIENNA, VA

RESTON, VA38.9099°N, -77.3377°W
AIR TEMP
98°F
WIND
6mph W
FISH INDEX
56SCORE / 100
GOOD · 3 OF 5
Flow Rate Historical Avg
MEDIAN FLOW RATE · 7 DAY
cfs
No flow data available
Precipitation History
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Weather Conditions
WEATHER CONDITIONS
TODAY
100°
77°
FRI
105°
78°
SAT
101°
71°
SUN
94°
69°
MON
88°
68°
TUE
84°
69°
WED
83°
67°
TIME
THU
7
NOW
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
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
TUE
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
TEMP
hourly forecast
99°
mild
99°
95°
90°
87°
86°
85°
84°
82°
81°
80°
79°
78°
81°
86°
90°
94°
97°
99°
101°
102°
104°
105°
105°
104°
103°
99°
95°
92°
89°
87°
85°
85°
83°
81°
80°
79°
81°
85°
88°
91°
94°
96°
99°
101°
97°
77°
79°
76°
71°
72°
73°
71°
71°
71°
70°
70°
70°
69°
69°
70°
71°
73°
77°
81°
84°
88°
90°
92°
93°
94°
93°
79°
69°
71°
70°
71°
70°
71°
70°
69°
69°
70°
70°
70°
72°
73°
73°
76°
78°
76°
83°
85°
87°
88°
82°
76°
68°
69°
68°
69°
69°
70°
69°
69°
69°
69°
69°
69°
70°
72°
74°
77°
79°
82°
84°
WIND
mph · gust · dir
4mph WSW
G 9 mph
4
G9
WSW
4
G9
SSW
5
G8
S
5
G12
SSW
7
G11
WNW
5
G13
WNW
5
G11
NW
5
G11
WNW
5
G13
WNW
5
G12
W
5
G12
W
4
G11
WNW
3
G10
W
6
G15
NW
5
G9
NW
3
G7
NW
0
G7
W
3
G9
WSW
5
G11
W
7
G12
W
6
G12
WSW
7
G12
WSW
7
G15
WSW
6
G15
WSW
6
G14
SW
10
G25
WSW
6
G10
W
5
G12
WNW
5
G10
WNW
5
G10
WNW
5
G7
WSW
5
G10
WNW
5
G9
WNW
5
G9
WNW
5
G8
W
5
G11
WNW
3
G11
WNW
5
G12
NNW
5
G12
NW
6
G10
NW
7
G10
NNW
7
G10
NNW
6
G11
NNW
5
G13
NNW
7
G15
NW
9
G15
ENE
10
G13
ENE
19
G26
SW
17
G21
S
9
G17
NE
3
G8
E
8
SSW
3
G12
SW
3
G11
NW
5
G7
S
4
SSW
3
NW
4
NNW
2
G7
N
1
G8
SW
3
G12
SSW
1
G13
SSW
4
G10
S
3
G8
S
4
G7
SSE
3
G5
SSE
4
SE
4
SSE
4
SSE
3
G6
ESE
1
G8
ENE
17
W
21
SW
5
NNE
6
ESE
10
SSE
3
G4
SE
1
G5
SE
5
NW
5
N
5
NNE
4
G7
E
5
G12
SSE
3
G13
S
4
G12
S
4
G8
SE
4
G7
S
4
G7
S
4
G6
S
3
G5
S
3
G6
S
3
G9
S
3
G9
SSE
2
G10
N
8
G10
N
12
NW
15
N
6
G11
NNE
7
G20
ESE
7
G23
SSE
5
G22
SSW
3
G5
SSW
4
WSW
5
G10
SSW
6
G7
SW
5
WSW
4
WSW
2
G4
SW
3
G5
S
4
G5
SSW
4
G5
SSW
2
G5
SW
3
G5
W
4
G5
WNW
6
WNW
PRECIP
chance %
1%
1%
1%
1%
1%
1%
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
3%
6%
7%
9%
8%
4%
2%
1%
1%
1%
1%
4%
0%
0%
0%
0%
0%
0%
1%
1%
1%
1%
1%
1%
57%
57%
57%
57%
57%
57%
49%
49%
49%
49%
49%
49%
6%
6%
6%
6%
6%
6%
2%
2%
2%
2%
2%
2%
74%
74%
74%
74%
74%
74%
67%
67%
67%
67%
67%
67%
25%
25%
25%
25%
25%
25%
21%
21%
21%
21%
21%
21%
68%
68%
68%
68%
68%
68%
56%
56%
56%
56%
56%
56%
30%
30%
30%
30%
30%
30%
16%
16%
16%
16%
16%
CLOUDS
cover %
0%
clear
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%
96%
100%
8%
39%
19%
12%
96%
0%
0%
100%
21%
72%
75%
23%
25%
30%
85%
84%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
79%
100%
100%
100%
100%
92%
100%
21%
84%
82%
95%
78%
86%
20%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
54%
60%
69%
85%
92%
77%
52%
PRESSURE
hPa · trend
1002
10021003100310029991000100010009981000100110021000100310031004100110001000999
TemperatureWind / GustsPrecipitationCloud coverPressure
Nowscroll →
FISH INDEX
56
Temperature
Too Hot
Wind
Light
Pressure
Stable
Moon Phase
Average
DAYLIGHT
SUNRISE
05:48 AM
SUNSET
08:38 PM
14H 50M OF DAYLIGHT1H 58M REMAINING
MOON PHASE
Waning Gibbous
92% illuminated

Station Location

38.9099, -77.3377
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-02 18:40 UTC
Site #01645745·USGS

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