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Aberdeen Proving Ground, Maryland

Community in Harford County, Maryland

Air quality

The air at Aberdeen Proving Ground

Index 22, good, led by ozone. Read at 11 PM from its reporting area, Northeast Maryland (MD), 11 miles off.

22Good
  • Fine particles (PM2.5)17Good10 mi
  • Ozone22Good22 ppb5.2 mi
  • Nitrogen dioxide3Good3.4 ppb21.7 mi
  • Sulfur dioxide0Good0.1 ppb21.7 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 46, good.

Smoke, the next 46 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Aberdeen Proving Ground

0.08 in in the last 24 hours, 0.13 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.08in
Last 3 days
0.13in

Visibility

How far you can see at Aberdeen Proving Ground, the next 46 hours

Fog: visibility falls to 0.7 miles Fri 7 PM, under a mile for 1 hour.

FriSat

On the radar over Aberdeen Proving Ground, MarylandReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Aberdeen Proving Ground, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.0 miles away.

measured now4 instruments

measured daily2 instruments

Aberdeen 1.2 NEMD-HR-2

In a volunteer observer's own ground/2.0 mi away/184 ft/119 ft above here

precip, snowfall, snow depth

Rank-

ConowingoCNWM2

At a cooperative observer's station/10.5 mi away/23 ft/42 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at US-40 W at MD-132, drawn

The nearest instrument reporting now, 1.0 mi from Aberdeen Proving Ground, Maryland. From its report of Oct 15, 2026, 10:30 PM local time: 3 of its 3 sheets.

The column

At 79 ft above sea level, 0 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.84 inHg and the temperature at 58.7 F.

Section from sea level of where US-40 W at MD-132 stands in the atmosphere, height to scale: the station 79 feet above sea level with 0 per cent of the air below it; the standard atmosphere's pressure there, 29.84 inches of mercury, and temperature, 58.7 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MD108FIG. D WHERE US-40 W AT MD-132 STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHEREUS-40 W AT MD-1320 PER CENT OF THE AIR BELOW IT79 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE29.84 inHgSTANDARD TEMPERATURE HERE58.7 FTITLEUS-40 W at MD-132, the columnSTATION REPORT · RWIS MD108TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 3DATE2026-10-16IDSR-MD108-1DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 41 degrees above the horizon at 39.51 N, and the day is 10 h 59 min long. Level ground there takes 66 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at US-40 W at MD-132, angles true: on Oct 16 it stands 41 degrees above the horizon, against 74 at the June solstice, 50 at the equinoxes and 27 at the December solstice; the day is 10 h 59 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MD108FIG. E THE SUN AT US-40 W AT MD-132ELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUETHE STATIONJUNE SOLSTICE 74°EQUINOXES 50°DECEMBER SOLSTICE 27°OCT 16, 41°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 59 MINLEVEL GROUND TAKES 66 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 39.51 N; THE SUN'S DECLINATION -9.1°TITLEUS-40 W at MD-132, the sunSTATION REPORT · RWIS MD108TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 2 of 3DATE2026-10-16IDSR-MD108-2DRAWN AS linework on paperSOURCES FB-ENG-007

The instrument

A road weather station, 79 ft above sea level. Its report of Oct 15, 2026, 10:30 PM local time is written on the sensors that made it.

Elevation of a road weather station, US-40 W at MD-132, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MD108FIG. F THE INSTRUMENTELEVATION OF A ROAD WEATHER STATION, EACH SENSOR WITH WHAT IT READ, OCT 15, 2026, 10:30 PM LOCAL TIMETHE ROAD, IN SECTIONPAVEMENT SENSOR, SET IN THE ROAD-PROBE UNDER THE ROAD-AIR TEMPERATURE ON THE TOWER-WIND AT THE TOP OF THE TOWER-SCHEMATIC; THE SPACING BETWEEN SENSORS IS NOT TO SCALETITLEUS-40 W at MD-132, the instrumentSTATION REPORT · RWIS MD108TYPEELEVATIONSCALESCHEMATICREVAS REPORTED SHEET 3 of 3DATE2026-10-16IDSR-MD108-3DRAWN AS linework on paperSOURCES FB-INS-001

The full report of US-40 W at MD-132, in 3 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Maryland

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

Near Aberdeen Proving Ground

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

Near Aberdeen Proving Ground

River and lake gauges