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Mount Aetna, Maryland

Community in Washington County, Maryland

Air quality

The air at Mount Aetna

Index 22, good, led by fine particles. Read at 8 AM from its reporting area, Hagerstown Region (MD), 16 miles off.

22Good
  • Fine particles (PM2.5)22Good5.9 mi
  • Ozone14Good11 ppb5.9 mi

The days ahead

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

Smoke, the next 43 hours

Little smoke near the ground through Sun 2 AM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Mount Aetna

0.07 in in the last 24 hours, and none in the 2 days before, to Fri 7 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.07in
Last 3 days
0.07in

Visibility

How far you can see at Mount Aetna, the next 43 hours

Visibility stays 5 miles or more through Sun 2 AM, lowest 5 miles Fri 6 PM.

FriSat

On the radar over Mount Aetna, MarylandReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Mount Aetna, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.6 miles away.

measured now4 instruments

Camp DavidRSP

At an airfield/8.5 mi away/1,841 ft/1,277 ft above here

temp, wind, gust, visibility, precip, pressure

Rank709of 736

measured daily2 instruments

Smithsburg 3.3 WMD-WH-16

In a volunteer observer's own ground/3.9 mi away/585 ft/21 ft above here

precip, snowfall, snow depth

Rank-

Hagerstown 1EHGCM2

At a cooperative observer's station/5.1 mi away/541 ft/23 ft below here

snowfall, snow depth, precip, high, low

Rank346of 736

Station report

The weather at IS 70 WB at MD-66, drawn

The nearest instrument reporting now, 1.6 mi from Mount Aetna, Maryland. From its report of Oct 16, 2026, 7:30 AM local time: 3 of its 3 sheets.

The column

At 538 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.34 inHg and the temperature at 57.1 F.

Section from sea level of where IS 70 WB at MD-66 stands in the atmosphere, height to scale: the station 538 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.34 inches of mercury, and temperature, 57.1 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MD132FIG. D WHERE IS 70 WB AT MD-66 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 ATMOSPHEREIS 70 WB AT MD-662 PER CENT OF THE AIR BELOW IT538 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 HERE29.34 inHgSTANDARD TEMPERATURE HERE57.1 FTITLEIS 70 WB at MD-66, the columnSTATION REPORT · RWIS MD132TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 3DATE2026-10-16IDSR-MD132-1DRAWN 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 39.59 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 IS 70 WB at MD-66, 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 MD132FIG. E THE SUN AT IS 70 WB AT MD-66ELEVATION 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 39.59 N; THE SUN'S DECLINATION -9.1°TITLEIS 70 WB at MD-66, the sunSTATION REPORT · RWIS MD132TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 2 of 3DATE2026-10-16IDSR-MD132-2DRAWN AS linework on paperSOURCES FB-ENG-007

The instrument

A road weather station, 538 ft above sea level. Its report of Oct 16, 2026, 7:30 AM local time is written on the sensors that made it.

Elevation of a road weather station, IS 70 WB at MD-66, each sensor drawn and labelled with what it read: no reading in the last day.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MD132FIG. F THE INSTRUMENTELEVATION OF A ROAD WEATHER STATION, EACH SENSOR WITH WHAT IT READ, OCT 16, 2026, 7:30 AM 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 SCALETITLEIS 70 WB at MD-66, the instrumentSTATION REPORT · RWIS MD132TYPEELEVATIONSCALESCHEMATICREVAS REPORTED SHEET 3 of 3DATE2026-10-16IDSR-MD132-3DRAWN AS linework on paperSOURCES FB-INS-001

The full report of IS 70 WB at MD-66, 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 Mount Aetna

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

Near Mount Aetna

River and lake gauges