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Herald Harbor, Maryland

Community in Anne Arundel County, Maryland

Air quality

The air at Herald Harbor

Index 18, good, led by ozone. Read at 11 PM from its reporting area, Metro Baltimore (MD), 10 miles off.

18Good
  • Fine particles (PM2.5)6Good-
  • Ozone18Good8 ppb16.5 mi
  • Nitrogen dioxide4Good4.2 ppb16.5 mi
  • Sulfur dioxide0Good0 ppb16.5 mi
  • Carbon monoxide-0.3 ppm16.1 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 52, moderate.

Smoke, the next 46 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 11 or under.

FriSat

Precipitation

What has fallen at Herald Harbor

0.01 in in the last 24 hours, and none in the 2 days before, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.01in
Last 3 days
0.01in

Visibility

How far you can see at Herald Harbor, the next 46 hours

Visibility stays 7 miles or more through Sat 8 PM, lowest 8 miles Fri 8 AM.

FriSat

On the radar over Herald Harbor, MarylandReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Herald Harbor, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.8 miles away.

measured now5 instruments

AnnapolisNAK

At an airfield/6.1 mi away/4 ft/51 ft below here

temp, wind, gust, visibility, precip, pressure

Rank2of 736

AnnapolisNDBC-APAM2

At a river or reservoir gauge/6.9 mi away/-/- ft from here

temp, wind, gust, humidity, pressure

Rank662of 736

Powder MillS2049

At a soil climate station/15.0 mi away/105 ft/50 ft above here

temp, humidity, soil temp, soil moisture

Rank734of 736

measured daily2 instruments

Crownsville 1.5 NMD-AA-45

In a volunteer observer's own ground/1.8 mi away/168 ft/113 ft above here

precip, snowfall, snow depth

Rank-

Ferndale - BWI SnowBSPM2

At a cooperative observer's station/9.8 mi away/118 ft/63 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Annapolis, drawn

The nearest airport reporting now, 6.1 mi from Herald Harbor, Maryland. From its report of Oct 15, 2026, 11:07 PM local time: 3 of its 6 sheets.

The sky

A few clouds at 1,800 ft, broken at 2,600 ft, overcast at 3,400 ft; the ceiling is 2,600 ft; visibility 10 mi or more.

Section of the sky over Annapolis, height above the station to scale: a few clouds cloud with its base at 1,800 feet, broken cloud with its base at 2,600 feet, overcast cloud with its base at 3,400 feet, the ceiling at 2,600 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT NAKFIG. A THE SKY OVER ANNAPOLISSECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION01,0002,0003,0004,0005,0006,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 3,400 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 2,600 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYFEW 1,800 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYCEILING 2,600 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEAnnapolis, the skySTATION REPORT · ASOS NAKTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-NAK-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

64.0 F with a dew point of 59.0 F, 84 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,200 ft up; the lowest cloud reported is at 1,800 ft.

Chart of the air at Annapolis: temperature 64.0 degrees Fahrenheit and dew point 59.0, 84 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,200 feet above the station, against the lowest cloud reported at 1,800 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT NAKFIG. B THE AIR AT ANNAPOLISTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 FSATURATES 1,200 FT ABOVE THE STATION, AT 57.8 FLOWEST CLOUD REPORTED, FEW 1,800 FTTEMPERATURE 64.0 FDEW POINT 59.0 FSPREAD 5.0 FRELATIVE HUMIDITY 84 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLEAnnapolis, the airSTATION REPORT · ASOS NAKTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-NAK-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the southeast (130 degrees) at 15 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 23 mph.

Plan of the wind at Annapolis, north up: blowing from 130 degrees, the southeast, at 15 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT NAKFIG. C THE WIND AT ANNAPOLISPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 130°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 15 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEAnnapolis, the windSTATION REPORT · ASOS NAKTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-NAK-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Annapolis, in 6 sheets, each beside the Field Book plates that explain it

-

Snow on the ground

Elsewhere in Maryland

21 places, each with its own forecast and its own instruments.

Near Herald Harbor

The nearest places, each with its own forecast and the instruments nearest it.

Near Herald Harbor

River and lake gauges