Waterlands
Marsh Run
USGS · 01617800
MARSH RUN
USGS · 01617800LIVE

MARSH RUN AT GRIMES, MD

WASHINGTON COUNTY, MD39.5146°N, -77.7772°W Updated 24 min ago
FLOW RATE
6.89cfs
GAUGE HT
1.09ft
AIR TEMP
79°F
WIND
8mph E
FISH INDEX
69SCORE / 100
GREAT · 4 OF 5
Flow Rate Historical Avg
MEDIAN FLOW RATE · 1 DAY
6.89cfs 34.8% vs avg
Optimal band: 68 cfs
PERIOD HIGH
7.58cfs
PERIOD LOW
6.56cfs
RUNNABLE
100%
last 1 day in band

Gauge Height

1.09ft
Precipitation History

Precipitation · YTD

Normal

Near-normal year

2026 to date

21.2in

≈ normal

21.19 in of precipitation so far this year — about average for this point in the season (normal 21.18 in).

YTD Total

21.2in

This year so far

Normal to Date

21.2in

30-yr average

Typical Range

16.5–26.7in

10th–90th pct YTD

Departure

0%

vs 30-yr normal

By Month

This year
Typical range
Normal
Jan: 2.38" · normal 3.03" (1.6–4.9)
Jan
Feb: 2.18" · normal 2.66" (1.3–4.9)
Feb
Mar: 3.55" · normal 3.77" (1.7–5.2)
Mar
Apr: 1.94" · normal 3.45" (2.0–5.3)
Apr
May: 5.08" · normal 3.69" (1.4–5.6)
May
Jun: 3.08" · normal 3.36" (1.7–5.5)
Jun
Jul: 2.99" (so far)· normal 3.36" (1.8–5.3)
Jul
Aug: normal 2.77" (1.5–4.2)
Aug
Sep: normal 4.12" (1.2–7.8)
Sep
Oct: normal 3.27" (0.8–5.5)
Oct
Nov: normal 2.92" (1.3–4.4)
Nov
Dec: normal 3.34" (1.7–4.9)
Dec
Baseline 19912020 · Source: Open-Meteo06:38 UTC
Your History · MARSH RUN AT GRIMES, MD

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Weather Conditions
WEATHER CONDITIONS
TODAY
82°
72°
MON
84°
67°
TUE
90°
65°
WED
99°
68°
THU
90°
71°
FRI
83°
59°
SAT
79°
54°
TIME
SUN
3
NOW
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
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
WED
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
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
TEMP
hourly forecast
82°
mild
82°
81°
82°
81°
76°
76°
75°
75°
74°
73°
72°
71°
70°
70°
69°
67°
69°
72°
75°
77°
79°
81°
82°
84°
84°
84°
84°
84°
82°
79°
76°
74°
73°
71°
70°
69°
69°
68°
68°
65°
66°
69°
73°
77°
81°
84°
86°
88°
89°
90°
90°
89°
86°
81°
77°
75°
73°
72°
71°
70°
69°
69°
69°
68°
71°
75°
80°
84°
88°
92°
95°
98°
99°
99°
99°
97°
93°
86°
82°
79°
78°
77°
76°
75°
75°
74°
73°
72°
74°
78°
81°
85°
88°
89°
88°
87°
90°
90°
89°
85°
82°
78°
75°
73°
71°
68°
67°
65°
62°
60°
59°
60°
63°
66°
69°
WIND
mph · gust · dir
8mph SE
G 10 mph
8
G10
SE
9
G12
SE
8
G10
ESE
7
G12
SE
8
G14
SE
4
G13
S
1
G6
S
4
G11
SSE
3
G10
SSE
2
G5
ESE
4
G5
E
5
G8
ESE
4
G8
SE
2
G5
ESE
3
G5
E
4
G5
ENE
3
G6
E
4
G8
SE
5
G7
SE
5
G8
SSE
6
G10
SSE
6
G10
SSE
6
G8
SSE
6
G7
SSE
7
G9
SSE
8
G9
SSE
6
G7
SSE
6
G8
SE
6
G9
SE
4
G10
SE
5
G10
SE
5
G10
SSE
4
G8
SSE
4
G9
SSE
3
G8
S
3
G6
SE
4
ESE
3
G4
ESE
5
G6
SE
3
G5
SSE
2
G3
SSE
3
G4
SSW
4
G5
SW
4
SW
4
G5
SW
4
G5
SSW
5
SSW
6
SSW
6
S
7
S
7
S
8
S
8
G11
S
7
G8
S
7
G9
S
7
G10
SSW
6
SW
5
SW
5
SSW
3
SW
2
SW
3
WSW
3
WSW
3
W
4
WSW
5
G8
WSW
6
G11
W
9
G14
WNW
10
G13
WNW
10
G12
W
8
G11
W
8
G11
W
9
G11
W
10
G11
W
11
G12
WNW
10
G12
NW
10
G17
NW
7
G11
NNW
5
NNW
2
W
4
SW
4
WSW
4
W
4
WNW
3
WNW
4
WNW
3
W
3
WNW
3
WNW
4
G7
WNW
7
G13
W
11
G17
WNW
13
G19
WNW
17
G21
NW
15
G20
NW
17
G22
NW
17
G22
NW
17
G21
NW
18
G20
NNW
15
G22
NNW
13
G25
NW
11
G25
NW
10
G27
NW
10
G27
NW
10
G26
NW
8
G11
NW
7
G11
NW
7
G10
NW
7
NW
5
G6
NNW
5
G6
NNW
5
G8
NNW
5
G11
NNW
6
G13
NW
7
G15
NNW
PRECIP
chance %
6%
6%
5%
8%
9%
4%
2%
1%
1%
1%
1%
1%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
1%
1%
1%
1%
1%
1%
1%
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%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
1%
1%
1%
1%
1%
1%
4%
4%
4%
4%
4%
4%
2%
2%
2%
2%
2%
2%
0%
0%
0%
0%
0%
0%
2%
2%
2%
2%
2%
2%
4%
4%
4%
4%
4%
4%
6%
6%
6%
6%
6%
6%
1%
CLOUDS
cover %
100%
overcast
100%
100%
100%
100%
100%
100%
89%
100%
90%
100%
100%
35%
3%
100%
60%
10%
0%
4%
2%
2%
3%
1%
3%
2%
0%
0%
0%
0%
0%
0%
0%
0%
0%
100%
80%
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%
6%
5%
0%
5%
5%
0%
7%
61%
81%
9%
100%
100%
82%
10%
7%
10%
42%
68%
6%
15%
100%
9%
100%
100%
100%
100%
48%
21%
53%
75%
100%
73%
100%
100%
76%
79%
97%
100%
100%
100%
100%
100%
100%
5%
100%
0%
0%
0%
2%
3%
4%
5%
4%
PRESSURE
hPa · trend
1006
10061006100710091007100610061008100410021002100299899799799799699810011004
TemperatureWind / GustsPrecipitationCloud coverPressure
Nowscroll →
FISH INDEX
69
Temperature
Warm
Wind
Light
Pressure
Stable
Moon Phase
Average
DAYLIGHT
SUNRISE
05:54 AM
SUNSET
08:39 PM
14H 45M OF DAYLIGHT
MOON PHASE
Waning Crescent
5% illuminated

Station Location

39.5146, -77.7772
Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-12 14:15 UTC
Site #01617800·USGS

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