Coastal Flood Advisory
Ends in 1 h 39 min
When
Until 5 PM EDT this afternoon, especially around the time of high tide.
Where
Shoreline in Charles and King George Counties.
Issued for this forecast zone · National Weather Service Baltimore MD/Washington DC
What, impacts and precautionsHide details
What
Up to one half foot of inundation above ground level expected in low lying areas due to tidal flooding.
Impacts
At 3.5 feet, water reaches yards near Cobb Island and docks near Dahlgren.
Additional details
Tides one and a half to two feet above normal. The next high tide at Goose Bay is at 3:15 PM. The next high tide at Dahlgren is at 2:03 PM.
Precautionary actions
If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.
Areas: Charles; King George
See it on weather.gov (opens in a new tab)

Observed 3:00 PM EDT at KDCA

Bryantown, MD weather

Mostly sunny and 64°18°, jacket by 7 PM.

Mostly agree

Now 64°18°

Mostly sunny

Wind: 3 mph5 km/h; From the east. Up to 5 mph8 km/h through 3 AM
Dew point: 41°5°; Comfortable
UV index: 3Moderate; Moderate until 4 PM · peak 4
Air quality: 33Good; Ozone · tomorrow moderate
Pressure: 30.5 inHg1033 hPa; Falling · −0.05 inHg−1.6 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Below 50°10° tonight after 9 PM
Low 38°3° tomorrow at 7 AM
Above 50°10° tomorrow by 10 AM
Drops 14°8° tomorrow night 6–9 PM (62°17° → 48°9°)
Fog Monday 6–9 AM

This afternoonNear 64°18° · Clear
TonightDown to 39°4° by 5 AM · Clear
Tomorrow morningUp to 56°13° by 11 AM · Clear
Tomorrow afternoonUp to 66°19° by 4 PM · Clear
Tomorrow nightDown to 41°5° by 4 AM · Clear
Monday morningUp to 60°16° by 11 AM · Partly cloudy
Monday afternoonUp to 69°21° by 2 PM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 3p	Partly sunny	63°17° (likely 61°16° to 64°18°)	63°17°	0%	6 mph10 km/h from E, gusts 9 mph14 km/h	50%	31%	3
Sat 4p	Sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	5 mph8 km/h from E, gusts 8 mph13 km/h	50%	26%	1
Sat 5p	Sunny	64°18° (likely 59°15° to 64°18°)	64°18°	0%	5 mph8 km/h from E, gusts 9 mph14 km/h	48%	14%	1
Sat 6p	Clear	60°16° (likely 55°13° to 60°16°)	60°16°	0%	3 mph5 km/h from E, gusts 6 mph9 km/h	58%	14%	0
Sat 7p	Partly cloudy	55°13° (likely 52°11° to 55°13°)	55°13°	0%	3 mph5 km/h from NE, gusts 7 mph11 km/h	69%	28%	0
Sat 8p	Partly cloudy	51°11° (likely 50°10° to 53°12°)	51°11°	0%	3 mph5 km/h from NE, gusts 8 mph12 km/h	80%	35%	0
Sat 9p	Clear	47°8° (likely 47°8° to 52°11°)	46°8°	0%	3 mph5 km/h from NE, gusts 8 mph13 km/h	93%	34%	0
Sat 10p	Partly cloudy	45°7° (likely 45°7° to 53°12°)	44°7°	0%	3 mph5 km/h from NE, gusts 7 mph12 km/h	100%	22%	0
Sat 11p	Clear	44°7° (likely 44°7° to 51°11°)	44°7°	0%	2 mph3 km/h from E, gusts 7 mph11 km/h	100%	12%	0
Sun 12a	Clear	43°6° (likely 43°6° to 51°11°)	43°6°	0%	2 mph3 km/h from E, gusts 6 mph9 km/h	100%	6%	0
Sun 1a	Clear	42°6° (likely 42°6° to 48°9°)	42°6°	0%	2 mph3 km/h from E, gusts 4 mph6 km/h	100%	3%	0
Sun 2a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	2 mph3 km/h from NE, gusts 4 mph7 km/h	100%	6%	0
Sun 3a	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	2 mph3 km/h from NE, gusts 5 mph8 km/h	100%	6%	0
Sun 4a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	2 mph3 km/h from NE, gusts 5 mph8 km/h	100%	6%	0
Sun 5a	Clear	39°4° (likely 39°4° to 46°8°)	39°4°	0%	2 mph3 km/h from NE, gusts 6 mph9 km/h	100%	7%	0
Sun 6a	Clear	39°4° (likely 39°4° to 47°8°)	39°4°	0%	2 mph3 km/h from NE, gusts 6 mph10 km/h	100%	7%	0
Sun 7a	Sunny	38°3° (likely 38°3° to 45°7°)	38°3°	0%	2 mph3 km/h from NE, gusts 7 mph10 km/h	100%	15%	0
Sun 8a	Sunny	40°4° (likely 40°4° to 46°8°)	38°3°	0%	3 mph5 km/h from NE, gusts 7 mph11 km/h	100%	16%	0
Sun 9a	Sunny	45°7° (likely 45°7° to 51°11°)	44°7°	0%	3 mph5 km/h from NE, gusts 7 mph12 km/h	100%	11%	1
Sun 10a	Sunny	52°11° (likely 52°11° to 57°14°)	52°11°	0%	3 mph5 km/h from NE, gusts 10 mph16 km/h	83%	4%	2
Sun 11a	Sunny	56°13° (likely 56°13° to 62°17°)	56°13°	0%	3 mph5 km/h from NE, gusts 11 mph17 km/h	74%	6%	3
Sun 12p	Sunny	60°16° (likely 60°16° to 64°18°)	60°16°	0%	3 mph5 km/h from E, gusts 9 mph14 km/h	64%	5%	4
Sun 1p	Sunny	63°17° (likely 62°17° to 65°18°)	63°17°	0%	3 mph5 km/h from E, gusts 7 mph12 km/h	56%	11%	4
Sun 2p	Mostly sunny	65°18° (likely 63°17° to 66°19°)	65°18°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	50%	15%	4
Sun 3p	Sunny	65°18° (likely 63°17° to 66°19°)	65°18°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	50%	26%	4
Sun 4p	Sunny	66°19° (likely 63°17° to 66°19°)	66°19°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	48%	14%	3
Sun 5p	Sunny	65°18° (likely 62°17° to 65°18°)	65°18°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	50%	7%	1
Sun 6p	Clear	62°17° (likely 57°14° to 62°17°)	62°17°	0%	3 mph5 km/h from E, gusts 5 mph9 km/h	54%	0%	0
Sun 7p	Clear	56°13° (likely 52°11° to 56°13°)	56°13°	0%	2 mph3 km/h from E, gusts 5 mph8 km/h	64%	0%	0
Sun 8p	Clear	48°9° (likely 48°9° to 54°12°)	48°9°	0%	1 mph2 km/h from NE, gusts 5 mph7 km/h	86%	0%	0
Sun 9p	Clear	47°8° (likely 47°8° to 52°11°)	47°8°	0%	1 mph2 km/h from NE, gusts 4 mph7 km/h	89%	0%	0
Sun 10p	Clear	45°7° (likely 45°7° to 51°11°)	45°7°	0%	1 mph2 km/h from E, gusts 5 mph7 km/h	96%	0%	0
Sun 11p	Clear	45°7° (likely 45°7° to 50°10°)	45°7°	0%	0 mph0 km/h, gusts 6 mph10 km/h	93%	0%	0
Mon 12a	Clear	44°7° (likely 44°7° to 48°9°)	44°7°	0%	0 mph0 km/h, gusts 5 mph8 km/h	93%	1%	0
Mon 1a	Clear	43°6° (likely 43°6° to 47°8°)	43°6°	0%	0 mph0 km/h, gusts 5 mph9 km/h	96%	1%	0
Mon 2a	Clear	42°6° (likely 42°6° to 45°7°)	42°6°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	1%	0
Mon 3a	Clear	42°6° (likely 41°5° to 45°7°)	42°6°	0%	1 mph2 km/h from NW, gusts 4 mph6 km/h	96%	5%	0
Mon 4a	Clear	41°5° (likely 40°4° to 44°7°)	41°5°	0%	1 mph2 km/h from NW, gusts 4 mph7 km/h	96%	26%	0
Mon 5a	Clear	41°5° (likely 39°4° to 43°6°)	41°5°	0%	2 mph3 km/h from W, gusts 5 mph9 km/h	96%	55%	0
Mon 6a	Fog	41°5° (likely 39°4° to 42°6°)	41°5°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	96%	58%	0
Mon 7a	Fog	40°4° (likely 39°4° to 42°6°)	40°4°	0%	2 mph3 km/h from W, gusts 5 mph9 km/h	96%	56%	0
Mon 8a	Fog	41°5° (likely 38°3° to 43°6°)	41°5°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	96%	54%	0
Mon 9a	Mostly sunny	46°8° (likely 41°5° to 51°11°)	46°8°	0%	2 mph3 km/h from W, gusts 5 mph7 km/h	93%	35%	1
Mon 10a	Mostly sunny	53°12° (likely 50°10° to 56°13°)	53°12°	0%	2 mph3 km/h from W, gusts 7 mph10 km/h	77%	6%	2
Mon 11a	Sunny	60°16° (likely 57°14° to 60°16°)	60°16°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	64%	0%	3
Mon 12p	Sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	3 mph5 km/h from W, gusts 9 mph15 km/h	56%	0%	4
Mon 1p	Sunny	68°20° (likely 64°18° to 68°20°)	68°20°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	49%	0%	4
Mon 2p	Sunny	69°21° (likely 66°19° to 69°21°)	69°21°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	47%	0%	4

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Sunny. High 64°18°, low 37°3°. Typical 64°18° / 42°6°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
2. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 39°4°
  Dry
Official NWS forecast
Today: Partly sunny, with a high near 64. East wind around 6 mph.
Tonight: Mostly clear, with a low around 37. Northeast wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–64°18°
Low, likely
37°3°–41°5°
Typical high / low
64°18° / 42°6°
Wind
8 mph12 km/h, gusts 18 mph28 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 66°19°, low 39°4°. Typical 63°17° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 48°9°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Day: Sunny, with a high near 66. Northeast wind around 3 mph.
Night: Clear, with a low around 39. North wind 0 to 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–66°19°
Low, likely
39°4°–45°7°
Typical high / low
63°17° / 42°6°
Wind
7 mph11 km/h, gusts 14 mph23 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 70°21°, low 47°8°. Typical 63°17° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Mostly sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Official NWS forecast
Day: Sunny, with a high near 70. West wind around 5 mph.
Night: Clear, with a low around 47.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
67°19°–70°21°
Low, likely
38°3°–47°8°
Typical high / low
63°17° / 42°6°
Wind
6 mph10 km/h, gusts 14 mph22 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 69°21°, low 46°8°. Typical 63°17° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 69.
Night: Mostly clear, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–69°21°
Low, likely
46°8°–50°10°
Typical high / low
63°17° / 41°5°
Wind
8 mph13 km/h, gusts 20 mph32 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 67°19°, low 47°8°. Typical 62°17° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 67.
Night: Mostly cloudy, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–67°19°
Low, likely
44°7°–49°9°
Typical high / low
62°17° / 41°5°
Wind
7 mph11 km/h, gusts 17 mph28 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 71°22°, low 49°9°. Typical 62°17° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 71.
Night: Mostly clear, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–71°22°
Low, likely
45°7°–50°10°
Typical high / low
62°17° / 41°5°
Wind
7 mph11 km/h, gusts 21 mph33 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 74°23°, low 51°11°. Typical 62°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 74.
Night: Mostly clear, with a low around 51.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–75°24°
Low, likely
47°8°–51°11°
Typical high / low
62°17° / 40°4°
Wind
6 mph9 km/h, gusts 26 mph42 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 71°22°, low 50°10°. Typical 62°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 55°13°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–75°24°
Low, likely
48°9°–52°11°
Typical high / low
62°17° / 40°4°
Wind
8 mph13 km/h, gusts 27 mph44 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 70°21°, low 55°13°. Typical 62°17° / 40°4°. Rain 0.04 in1 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 69°21°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 64°18°
  20% chance · 0.03 in0.8 mm
4. Overnight
  midnight–6 AM
  Drizzle, 64°18°
  20% chance · 0.05 in1.4 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–75°24°
Low, likely
53°12°–56°13°
Typical high / low
62°17° / 40°4°
Wind
9 mph14 km/h, gusts 20 mph32 km/h
UV peak
1
Monday, Nov 2. Drizzle. High 74°23°, low 62°17°. Typical 61°16° / 39°4°. Rain 0.13 in3.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 65°18°
  20% chance · 0.04 in1 mm
2. Afternoon
  noon–6 PM
  Cloudy, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 69°21°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
66°19°–79°26°
Low, likely
59°15°–70°21°
Typical high / low
61°16° / 39°4°
Wind
15 mph24 km/h, gusts 36 mph58 km/h
UV peak
1

10 days15 days30 days

The outlook

Today
Dry, high 64°, low 37°.
Tomorrow
Dry, high 66°, low 39°.
Monday
Dry, high 70°, low 47°, warming up.
Rest of week
Mostly dry, highs 67–74°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (LWX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Upper Machodoc Creek near Dahlgren (IN MLLW)

19 mi

Minor flooding

Level: 3.7 ft

Forecast peak 3.7 ft Sat 3 PM, minor flooding

Reading from Sat 2 PM · NWS gauge page

Zekiah Swamp Run near Newtown

6.1 mi

Below flood stage

Level: 0.9 ft
Flow: 13 cfs

Reading from Sat 1:15 PM · NWS gauge page

Mattawoman Creek near Pomonkey

12 mi

Below flood stage

Level: 2.2 ft
Flow: 8 cfs

Reading from Sat 1:50 PM · NWS gauge page

Piscataway Creek at Piscataway

13 mi

Below flood stage

Level: 2.5 ft
Flow: 1 cfs

Reading from Sat 1:30 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 68% less heating than a typical week.

This week 29Typical 91

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 26
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 15 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 41°F).

Open the windows?

Today, 4:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

Mechanicsville 5 NE · official normals 1991–2020 · records 1974–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

On average 1°0° colder than normal (daily mean temperature).

+3°+1°SunOct 18
+2°+1°MonOct 19
−4°−2°TueOct 20
+1°WedOct 21
−1°ThuOct 22
±0°FriOct 23
−4°−2°SatOct 24

Bryantown weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 51 min; Losing 2 min 21 s a day; shortest Dec 21, 1 h 23 min less
Golden hour: 5:40–6:33 PM; Morning 7:09–8:02 AM
Blue hour: 6:33–6:44 PM; Morning 6:58–7:09 AM; first light 6:58 AM

Stars tonight? Fair

Mostly clear 10 PM–6:59 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:38 AM · rises 5:13 PM
Full moon: Oct 26
New moon: Nov 9

Looking southwest from Bryantown. The highest point on the skyline is about 1,100 ft, 24 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Coastal Flood Advisory

Bryantown, MD weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Upper Machodoc Creek near Dahlgren (IN MLLW)

Zekiah Swamp Run near Newtown

Mattawoman Creek near Pomonkey

Piscataway Creek at Piscataway

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon