Storm Station
Derwood, Maryland
59°
Overcast· Feels like 59°·Light breeze 6 mph NNW
Rain likely. Cloudy, with a high near 63. Northwest wind 13 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
-UV
-Air quality
90%Humidity
100%Cloud

What is measuring near here

The 6 instruments nearest Derwood, 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 now4 instruments

GaithersburgGAI

At an airfield/3.6 mi away/539 ft/98 ft above here

temp, wind, gust, visibility, precip, pressure

Rank1of 403

Powder MillS2049

At a soil climate station/17.8 mi away/105 ft/336 ft below here

temp, humidity, soil temp, soil moisture

Rank-

measured daily2 instruments

Rockville 2.3 NWMD-MG-87

In a volunteer observer's own ground/1.8 mi away/463 ft/22 ft above here

precip, snowfall, snow depth

Rank-

Damascus 3 SSWDMAM2

At a cooperative observer's station/11.0 mi away/676 ft/235 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Gaithersburg, drawn

The nearest airport reporting now, 3.6 mi from Derwood. From its report of Sep 27, 2026, 7:56 AM local time: 3 of its 6 sheets.

The sky

Broken at 10,000 ft, overcast at 12,000 ft; the ceiling is 10,000 ft; visibility 10 mi or more.

Section of the sky over Gaithersburg, height above the station to scale: broken cloud with its base at 10,000 feet, overcast cloud with its base at 12,000 feet, the ceiling at 10,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GAIFIG. A THE SKY OVER GAITHERSBURGSECTION, 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 FTOVC 12,000 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 10,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 10,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEGaithersburg, the skySTATION REPORT · ASOS GAITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-GAI-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-013, FB-SKY-014

The air

59.0 F with a dew point of 53.0 F, 80 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,400 ft up; the lowest cloud reported is at 10,000 ft.

Chart of the air at Gaithersburg: temperature 59.0 degrees Fahrenheit and dew point 53.0, 80 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,400 feet above the station, against the lowest cloud reported at 10,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GAIFIG. B THE AIR AT GAITHERSBURGTHE 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 F70 FSATURATES 1,400 FT ABOVE THE STATION, AT 51.6 FABOVE THIS SHEET: LOWEST CLOUD REPORTED, BKN 10,000 FTTEMPERATURE 59.0 FDEW POINT 53.0 FSPREAD 6.0 FRELATIVE HUMIDITY 80 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 POINTTITLEGaithersburg, the airSTATION REPORT · ASOS GAITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-GAI-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

At 7 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Gaithersburg, north up: at 7 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GAIFIG. C THE WIND AT GAITHERSBURGPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONDIRECTION NOT REPORTEDBEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 7 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEGaithersburg, the windSTATION REPORT · ASOS GAITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-GAI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Damascus 3 SSW (DMAM2), 11.0 miles from here, read 27 Sep, 07:00. measured daily

Elsewhere in Maryland

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

Near Derwood

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