Coastal Flood Advisory
Starts in 1 h 58 min
When
From 2 PM this afternoon to 8 PM EDT this evening, especially around the time of high tide.
Where
Shoreline in Anne Arundel County.
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 2.8 feet, flooding of some of the parking area near Dock Street in Annapolis may occur, with water surrounding the Alex Haley Memorial.
Additional details
Tides one to one and a half feet above normal. The next high tide at Annapolis U.S. Naval Academy is at 4:47 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: Anne Arundel
See it on weather.gov (opens in a new tab)

Observed 10:54 AM EDT at KNAK

Herald Harbor, MD weather

Sunny and 56°13°, jacket by 7 PM.

Mostly agree

Now 56°13°

Sunny

Wind: 6 mph9 km/h; From the north-northeast. Up to 6 mph10 km/h through 12 AM
Dew point: 43°6°; Comfortable
UV index: 3Moderate; Moderate until 3 PM · peak 4
Air quality: 36Good; PM2.5 (fine particles) · tomorrow moderate
Pressure: 30.58 inHg1036 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (57°14° then, 56°13° now)

Good hours for

High 62°17° today at 3 PM
Below 50°10° tonight after 9 PM
Low 41°5° tomorrow at 7 AM
Above 50°10° tomorrow by 10 AM

This afternoonNear 61°16° · Clear
TonightDown to 42°6° by 5 AM · Clear
Tomorrow morningUp to 58°14° by 11 AM · Clear
Tomorrow afternoonUp to 65°18° by 3 PM · Clear
Tomorrow nightDown to 42°6° by 3 AM · Clear
Monday morningUp to 58°14° by 11 AM · 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 12p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	6 mph10 km/h from NE, gusts 9 mph15 km/h	55%	7%	3
Sat 1p	Sunny	60°16° (likely 58°14° to 60°16°)	60°16°	0%	6 mph10 km/h from E, gusts 9 mph15 km/h	53%	6%	4
Sat 2p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	5 mph8 km/h from E, gusts 8 mph13 km/h	49%	8%	3
Sat 3p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	5 mph8 km/h from E, gusts 7 mph11 km/h	48%	3%	2
Sat 4p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	3 mph5 km/h from E, gusts 7 mph11 km/h	48%	2%	1
Sat 5p	Sunny	62°17° (likely 58°14° to 62°17°)	62°17°	0%	3 mph5 km/h from E, gusts 7 mph10 km/h	46%	1%	1
Sat 6p	Clear	59°15° (likely 55°13° to 59°15°)	59°15°	0%	3 mph5 km/h from E, gusts 5 mph9 km/h	55%	3%	0
Sat 7p	Clear	54°12° (likely 52°11° to 55°13°)	54°12°	0%	3 mph5 km/h from E, gusts 5 mph8 km/h	66%	7%	0
Sat 8p	Clear	50°10° (likely 50°10° to 54°12°)	50°10°	0%	2 mph3 km/h from E, gusts 7 mph11 km/h	77%	9%	0
Sat 9p	Clear	49°9° (likely 49°9° to 53°12°)	49°9°	0%	1 mph2 km/h from E, gusts 7 mph11 km/h	83%	11%	0
Sat 10p	Clear	48°9° (likely 48°9° to 52°11°)	48°9°	0%	1 mph2 km/h from E, gusts 5 mph7 km/h	86%	6%	0
Sat 11p	Clear	47°8° (likely 47°8° to 51°11°)	47°8°	0%	1 mph2 km/h from E, gusts 4 mph6 km/h	89%	0%	0
Sun 12a	Clear	46°8° (likely 46°8° to 51°11°)	46°8°	0%	1 mph2 km/h from E, gusts 4 mph6 km/h	93%	0%	0
Sun 1a	Clear	45°7° (likely 45°7° to 51°11°)	45°7°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	0%	0
Sun 2a	Clear	43°6° (likely 43°6° to 50°10°)	43°6°	0%	0 mph0 km/h, gusts 4 mph6 km/h	100%	0%	0
Sun 3a	Clear	43°6° (likely 43°6° to 50°10°)	43°6°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	1%	0
Sun 4a	Clear	43°6° (likely 43°6° to 50°10°)	43°6°	0%	1 mph2 km/h from N, gusts 4 mph6 km/h	100%	1%	0
Sun 5a	Clear	42°6° (likely 42°6° to 50°10°)	42°6°	0%	1 mph2 km/h from N, gusts 5 mph8 km/h	100%	1%	0
Sun 6a	Clear	42°6° (likely 41°5° to 50°10°)	42°6°	0%	1 mph2 km/h from N, gusts 6 mph9 km/h	100%	3%	0
Sun 7a	Sunny	41°5° (likely 41°5° to 49°9°)	41°5°	0%	1 mph2 km/h from N, gusts 5 mph9 km/h	100%	3%	0
Sun 8a	Sunny	42°6° (likely 41°5° to 49°9°)	42°6°	0%	2 mph3 km/h from N, gusts 5 mph8 km/h	100%	7%	0
Sun 9a	Mostly sunny	49°9° (likely 46°8° to 51°11°)	49°9°	0%	2 mph3 km/h from N, gusts 5 mph8 km/h	86%	13%	1
Sun 10a	Mostly sunny	54°12° (likely 53°12° to 56°13°)	54°12°	0%	2 mph3 km/h from NE, gusts 6 mph10 km/h	74%	9%	2
Sun 11a	Mostly sunny	58°14° (likely 57°14° to 59°15°)	58°14°	0%	3 mph5 km/h from NE, gusts 6 mph10 km/h	64%	13%	3
Sun 12p	Sunny	60°16° (likely 59°15° to 61°16°)	60°16°	0%	3 mph5 km/h from NE, gusts 6 mph10 km/h	58%	12%	4
Sun 1p	Sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	3 mph5 km/h from NE, gusts 6 mph10 km/h	52%	7%	4
Sun 2p	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	3 mph5 km/h from E, gusts 6 mph9 km/h	48%	5%	4
Sun 3p	Sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	3 mph5 km/h from E, gusts 5 mph8 km/h	46%	3%	4
Sun 4p	Sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	3 mph5 km/h from E, gusts 6 mph9 km/h	45%	1%	3
Sun 5p	Sunny	64°18° (likely 60°16° to 64°18°)	64°18°	0%	3 mph5 km/h from E, gusts 6 mph10 km/h	46%	0%	1
Sun 6p	Clear	61°16° (likely 57°14° to 61°16°)	61°16°	0%	2 mph3 km/h from E, gusts 6 mph10 km/h	51%	0%	0
Sun 7p	Clear	55°13° (likely 54°12° to 56°13°)	55°13°	0%	1 mph2 km/h from E, gusts 4 mph7 km/h	66%	0%	0
Sun 8p	Clear	52°11° (likely 52°11° to 55°13°)	52°11°	0%	0 mph0 km/h, gusts 3 mph4 km/h	77%	0%	0
Sun 9p	Clear	49°9° (likely 49°9° to 54°12°)	49°9°	0%	0 mph0 km/h, gusts 3 mph5 km/h	86%	0%	0
Sun 10p	Clear	48°9° (likely 48°9° to 53°12°)	48°9°	0%	0 mph0 km/h, gusts 2 mph3 km/h	86%	1%	0
Sun 11p	Clear	46°8° (likely 46°8° to 52°11°)	46°8°	0%	0 mph0 km/h, gusts 4 mph6 km/h	93%	2%	0
Mon 12a	Clear	45°7° (likely 45°7° to 51°11°)	45°7°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	3%	0
Mon 1a	Clear	43°6° (likely 43°6° to 50°10°)	43°6°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	100%	8%	0
Mon 2a	Clear	43°6° (likely 43°6° to 49°9°)	43°6°	0%	1 mph2 km/h from W, gusts 4 mph7 km/h	100%	10%	0
Mon 3a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	1 mph2 km/h from W, gusts 5 mph8 km/h	100%	9%	0
Mon 4a	Clear	42°6° (likely 42°6° to 45°7°)	42°6°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	100%	10%	0
Mon 5a	Clear	42°6° (likely 41°5° to 45°7°)	42°6°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	100%	8%	0
Mon 6a	Mostly clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	100%	19%	0
Mon 7a	Sunny	39°4° (likely 39°4° to 46°8°)	39°4°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	100%	17%	0
Mon 8a	Sunny	40°4° (likely 40°4° to 47°8°)	40°4°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	100%	24%	0
Mon 9a	Sunny	45°7° (likely 43°6° to 53°12°)	45°7°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	96%	23%	1
Mon 10a	Mostly sunny	52°11° (likely 49°9° to 57°14°)	52°11°	0%	3 mph5 km/h from W, gusts 8 mph13 km/h	80%	3%	2
Mon 11a	Sunny	58°14° (likely 56°13° to 61°16°)	58°14°	0%	3 mph5 km/h from W, gusts 9 mph14 km/h	69%	0%	3

Days ahead

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

Today, Oct 24. Mostly sunny. High 62°17°, low 41°5°. Typical 64°18° / 49°9°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
2. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 42°6°
  Dry
Official NWS forecast
Today: Sunny, with a high near 62. East wind around 6 mph.
Tonight: Patchy fog after 1am. Clear, with a low around 41. Northeast wind 0 to 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–62°17°
Low, likely
39°4°–46°8°
Typical high / low
64°18° / 49°9°
Wind
7 mph12 km/h, gusts 14 mph23 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 65°18°, low 39°4°. Typical 64°18° / 49°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 42°6°
  Dry
Official NWS forecast
Day: Patchy fog before 8am. Sunny, with a high near 65. Northeast wind around 3 mph.
Night: Clear, with a low around 39. Southwest wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–65°18°
Low, likely
39°4°–49°9°
Typical high / low
64°18° / 49°9°
Wind
7 mph10 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 70°21°, low 50°10°. Typical 64°18° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  Dry
Official NWS forecast
Day: Sunny, with a high near 70. West wind around 5 mph.
Night: Mostly clear, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–70°21°
Low, likely
40°4°–50°10°
Typical high / low
64°18° / 48°9°
Wind
7 mph11 km/h, gusts 12 mph19 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 65°18°, low 46°8°. Typical 63°17° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  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 65.
Night: Mostly clear, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–66°19°
Low, likely
46°8°–54°12°
Typical high / low
63°17° / 48°9°
Wind
11 mph18 km/h, gusts 21 mph34 km/h
UV peak
4
Wednesday, Oct 28. Mostly cloudy. High 63°17°, low 48°9°. Typical 63°17° / 48°9°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 63.
Night: Mostly cloudy, with a low around 48.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–63°17°
Low, likely
46°8°–52°11°
Typical high / low
63°17° / 48°9°
Wind
10 mph16 km/h, gusts 16 mph26 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 69°21°, low 50°10°. Typical 62°17° / 47°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 69.
Night: Mostly clear, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–69°21°
Low, likely
48°9°–53°12°
Typical high / low
62°17° / 47°8°
Wind
8 mph13 km/h, gusts 22 mph35 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 72°22°, low 50°10°. Typical 62°17° / 47°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 72.
Night: Mostly clear, with a low around 50.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
69°21°–75°24°
Low, likely
50°10°–52°11°
Typical high / low
62°17° / 47°8°
Wind
13 mph21 km/h, gusts 26 mph41 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 66°19°, low 51°11°. Typical 62°17° / 47°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 61°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  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
60°16°–69°21°
Low, likely
49°9°–53°12°
Typical high / low
62°17° / 47°8°
Wind
14 mph23 km/h, gusts 27 mph43 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 65°18°, low 54°12°. Typical 61°16° / 46°8°. Rain 0.02 in0.5 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 58°14°
  20% chance · 0.02 in0.4 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
57°14°–70°21°
Low, likely
48°9°–57°14°
Typical high / low
61°16° / 46°8°
Wind
10 mph17 km/h, gusts 19 mph30 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 67°19°, low 57°14°. Typical 61°16° / 46°8°. Rain 0.09 in2.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 61°16°
  20% chance
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
57°14°–72°22°
Low, likely
51°11°–60°16°
Typical high / low
61°16° / 46°8°
Wind
9 mph15 km/h, gusts 15 mph23 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 41°.
Tomorrow
Dry, high 65°, low 39°, warming up.
Monday
Dry, high 70°, low 50°, warming up.
Rest of week
Mostly dry, highs 63–72°.

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

Severn River at Annapolis (IN MLLW)

6.9 mi

Below flood stage

Level: 1.9 ft

Forecast peak 2.9 ft Sat 4 PM, minor flooding

Reading from Sat 10:30 AM · NWS gauge page

Northwest Branch Patapsco River at Baltimore/Fort McHenry (IN MLLW)

15 mi

Below flood stage

Level: 2.0 ft

Forecast peak 3.1 ft Sat 6 PM, action stage

Reading from Sat 10:30 AM · NWS gauge page

SOUTH FORK JABEZ BRANCH AT MILLERSVILLE, MD

4.3 mi

Level: 3.2 ft

Reading from Sat 9:55 AM · NWS gauge page

Sawmill Creek at Glen Burnie

8.7 mi

Below flood stage

Level: 1.9 ft
Flow: 3 cfs

Reading from Sat 9:45 AM · NWS gauge page

For your home

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

Heating this week

About 58% less heating than a typical week.

This week 28Typical 66

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 21
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 10 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 43°F).

Open the windows?

Today, 1:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Annapolis United States Naval Academy Asos · official normals 1991–2020 · records 1894–2026

Oct 24, today vs a typical year

Today’s expected high is 2°1° colder than typical.

Last 7 days vs normal

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

−6°−3°SunOct 18
−3°−2°MonOct 19
+4°+2°TueOct 20
+2°+1°WedOct 21
+2°+1°ThuOct 22
+1°FriOct 23
—SatOct 24

Herald Harbor weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 50 min; Losing 2 min 21 s a day; shortest Dec 21, 1 h 24 min less
Golden hour: 5:38–6:31 PM; Morning 7:08–8:02 AM
Blue hour: 6:31–6:42 PM; Morning 6:57–7:08 AM; first light 6:57 AM

Stars tonight? Fair

Clear 6:42 PM–6:58 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:37 AM · rises 5:11 PM
Full moon: Oct 26
New moon: Nov 9

Looking east from Herald Harbor. The highest point on the skyline is about 1,600 ft, 20 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

Herald Harbor, MD weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Severn River at Annapolis (IN MLLW)

Northwest Branch Patapsco River at Baltimore/Fort McHenry (IN MLLW)

SOUTH FORK JABEZ BRANCH AT MILLERSVILLE, MD

Sawmill Creek at Glen Burnie

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