Storm Station
San Mar, Maryland
58°
Overcast· Feels like 58°·Light breeze 7 mph NNW
Rain likely. Cloudy, with a high near 64. Northwest wind 14 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
-UV
-Air quality
78%Humidity
100%Cloud

What is measuring near here

The 5 instruments nearest San Mar, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.2 miles away.

measured now3 instruments

Antietam National BattlefieldANBM2

At a river or reservoir gauge/7.8 mi away/476 ft/92 ft below here

temp, wind, gust, humidity, pressure

Rank70of 403

Camp DavidRSP

At an airfield/11.5 mi away/1,841 ft/1,273 ft above here

temp, wind, gust, visibility, precip, pressure

Rank318of 403

measured daily2 instruments

Boonsboro 0.4 NNEMD-WH-17

In a volunteer observer's own ground/2.4 mi away/556 ft/12 ft below here

precip, snowfall, snow depth

Rank-

Hagerstown 1EHGCM2

At a cooperative observer's station/6.9 mi away/541 ft/27 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Camp David, drawn

The nearest airport reporting now, 11.5 mi from San Mar. From its report of Sep 27, 2026, 7:54 AM local time: 3 of its 5 sheets.

The sky

A few clouds at 5,500 ft, scattered at 9,500 ft, broken at 12,000 ft; the ceiling is 12,000 ft; visibility 10 mi or more.

Section of the sky over Camp David, height above the station to scale: a few clouds cloud with its base at 5,500 feet, scattered cloud with its base at 9,500 feet, broken cloud with its base at 12,000 feet, the ceiling at 12,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RSPFIG. A THE SKY OVER CAMP DAVIDSECTION, 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 STATION02,5005,0007,50010,00012,50015,00017,50020,000ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTBKN 12,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYSCT 9,500 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYFEW 5,500 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYCEILING 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLECamp David, the skySTATION REPORT · ASOS RSPTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-09-27IDSR-RSP-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018, FB-SKY-013, FB-SKY-014

The air

53.0 F with a dew point of 48.0 F, 83 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 5,500 ft.

Chart of the air at Camp David: temperature 53.0 degrees Fahrenheit and dew point 48.0, 83 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 5,500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RSPFIG. B THE AIR AT CAMP DAVIDTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,00040 F50 F60 FSATURATES 1,200 FT ABOVE THE STATION, AT 46.8 FLOWEST CLOUD REPORTED, FEW 5,500 FTTEMPERATURE 53.0 FDEW POINT 48.0 FSPREAD 5.0 FRELATIVE HUMIDITY 83 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 POINTTITLECamp David, the airSTATION REPORT · ASOS RSPTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-09-27IDSR-RSP-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The column

At 1,841 ft above sea level, 6 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 27.98 inHg and the temperature at 52.4 F; the station's altimeter setting of 29.73 inHg means its barometer reads 27.80 inHg; it reports 53.0 F, 0.6 F warmer than standard.

Section from sea level of where Camp David stands in the atmosphere, height to scale: the station 1,841 feet above sea level with 6 per cent of the air below it; the standard atmosphere's pressure there, 27.98 inches of mercury, and temperature, 52.4 degrees Fahrenheit; the altimeter setting of 29.73 and the station pressure it means, 27.80.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RSPFIG. D WHERE CAMP DAVID 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 ATMOSPHERECAMP DAVID6 PER CENT OF THE AIR BELOW IT1,841 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 HERE27.98 inHgSTANDARD TEMPERATURE HERE52.4 FALTIMETER SETTING, REPORTED29.73 inHgITS BAROMETER READS27.80 inHgTEMPERATURE, REPORTED53.0 FTITLECamp David, the columnSTATION REPORT · ASOS RSPTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-09-27IDSR-RSP-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Camp David, in 5 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Hagerstown 1E (HGCM2), 6.9 miles from here, read 26 Sep, 23:59. measured daily

Elsewhere in Maryland

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

Near San Mar

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