USGS · 01617800

MARSH RUN

USGS · 01617800LIVE

MARSH RUN AT GRIMES, MD

WASHINGTON COUNTY, MD39.5146°N, -77.7772°W Updated 44 min ago

FLOW RATE

6.56cfs

GAUGE HT

1.05ft

AIR TEMP

81°F

WIND

4mph SSW

FISH INDEX

63SCORE / 100

GOOD · 3 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 1 DAY

6.56cfs 40.2% vs avg

Optimal band: 6–8 cfs

PERIOD HIGH

6.89cfs

PERIOD LOW

6.25cfs

RUNNABLE

100%

last 1 day in band

Gauge Height

1.05ft

Precipitation History

Your History · MARSH RUN AT GRIMES, MD

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Weather Conditions

WEATHER CONDITIONS

TODAY

104°

75°

FRI

105°

71°

SAT

99°

70°

SUN

95°

69°

MON

86°

68°

TUE

79°

70°

WED

70°

68°

TIME

THU

NOW

FRI

SAT

SUN

MON

TEMP

hourly forecast

76°

mild

76°

75°

78°

84°

88°

91°

94°

97°

99°

101°

103°

104°

102°

97°

92°

89°

87°

85°

84°

82°

81°

79°

78°

80°

86°

91°

95°

98°

100°

102°

104°

105°

104°

97°

96°

90°

74°

72°

71°

70°

71°

70°

73°

77°

82°

87°

91°

92°

94°

96°

98°

99°

95°

77°

73°

72°

71°

72°

71°

74°

78°

80°

83°

88°

92°

93°

95°

93°

95°

94°

74°

72°

71°

70°

69°

68°

69°

68°

69°

70°

73°

75°

76°

79°

82°

84°

85°

86°

85°

83°

81°

78°

75°

72°

WIND

mph · gust · dir

2mph SSE

G 4 mph

SSE

G13

WNW

G10

WNW

G14

G13

G12

WNW

G12

WNW

G14

WNW

G15

WNW

G13

WNW

G14

G13

G10

SSE

ESE

SSE

ESE

WSW

G11

NNW

G10

NNW

G11

NNW

G12

G11

G16

WNW

G16

WNW

G16

G14

NNW

G14

G13

G21

G35

WSW

WNW

NNW

G19

WNW

G12

WSW

WNW

G10

WNW

G13

WSW

G14

WNW

G14

WNW

G17

G34

SSW

G28

SSW

NNW

WNW

NNW

WNW

NNW

G25

SSW

G14

WSW

SSE

NNW

ESE

SSE

ESE

G11

G13

G15

G17

G19

PRECIP

chance %

27%

35%

67%

61%

28%

37%

54%

37%

CLOUDS

cover %

clear

10%

100%

71%

100%

75%

15%

70%

31%

100%

84%

100%

70%

15%

29%

67%

100%

63%

59%

30%

70%

90%

92%

67%

100%

74%

24%

22%

26%

23%

38%

20%

59%

100%

62%

46%

100%

97%

91%

84%

71%

56%

50%

PRESSURE

hPa · trend

1002

TemperatureWind / GustsPrecipitationCloud coverPressure

Nowscroll →

FISH INDEX

Temperature

Too Hot

Wind

Calm

Pressure

Stable

Moon Phase

Average

DAYLIGHT

SUNRISE

05:48 AM

SUNSET

08:42 PM

14H 54M OF DAYLIGHT15H 43M REMAINING

MOON PHASE

Waning Gibbous

95% illuminated

Station Location

39.5146, -77.7772

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DATA · USGS · NOAA · NWSUPDATED 2026-07-02 04:59 UTC

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