Storm Station
Mercer Island, Washington
58°
Partly cloudy· Feels like 58°·Light breeze 5 mph N
Mostly cloudy, with a low around 48. Northeast wind around 6 mph.
-UV
-Air quality
60%Humidity
52%Cloud

What is measuring near here

The 5 instruments nearest Mercer Island, 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 now3 instruments

Seattle/Boeing FldBFI

At an airfield/4.4 mi away/16 ft/259 ft below here

temp, wind, gust, visibility, precip, pressure

Rank117of 618

S144Th TukwilaT144T

Beside a road/6.9 mi away/144 ft/131 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

Seattle WFOSEAW1

At a river or reservoir gauge/8.0 mi away/33 ft/242 ft below here

temp, wind, gust, humidity, pressure

Rank52of 618

measured daily2 instruments

Mercer Island 1.2 NEWA-KG-315

In a volunteer observer's own ground/1.0 mi away/111 ft/164 ft below here

precip, snowfall, snow depth

Rank-

Seattle WaSEW

At a cooperative observer's station/8.1 mi away/24 ft/251 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Seattle/Boeing Fld, drawn

The nearest airport reporting now, 4.4 mi from Mercer Island. From its report of Sep 27, 2026, 1:53 AM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Seattle/Boeing Fld, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BFIFIG. A THE SKY OVER SEATTLE/BOEING FLDSECTION, 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 STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESeattle/Boeing Fld, the skySTATION REPORT · ASOS BFITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-BFI-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

52.0 F with a dew point of 45.0 F, 77 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,600 ft up.

Chart of the air at Seattle/Boeing Fld: temperature 52.0 degrees Fahrenheit and dew point 45.0, 77 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,600 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BFIFIG. B THE AIR AT SEATTLE/BOEING FLDTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 FSATURATES 1,600 FT ABOVE THE STATION, AT 43.4 FTEMPERATURE 52.0 FDEW POINT 45.0 FSPREAD 7.0 FRELATIVE HUMIDITY 77 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 POINTTITLESeattle/Boeing Fld, the airSTATION REPORT · ASOS BFITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-BFI-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

At 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Seattle/Boeing Fld, north up: at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BFIFIG. C THE WIND AT SEATTLE/BOEING FLDPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONDIRECTION NOT REPORTEDBEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESeattle/Boeing Fld, the windSTATION REPORT · ASOS BFITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-BFI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Seattle/Boeing Fld, in 6 sheets, each beside the Field Book plates that explain it

-in

Snow on the ground

Elsewhere in Washington

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

Near Mercer Island

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