Storm Station
Sign in

Tysons, Virginia

Community in Fairfax County, Virginia

Air quality

The air at Tysons

Index 21, good, led by ozone. Read at 6 AM from its reporting area, Northern Virginia and DC (DC), 12 miles off.

21Good
  • Fine particles (PM2.5)14Good21.1 mi
  • Ozone21Good12 ppb15 mi
  • Nitrogen dioxide2Good2.8 ppb21.1 mi
  • Sulfur dioxide0Good0 ppb21.1 mi
  • Carbon monoxide-0.1 ppm21.1 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 43, good.

Smoke, the next 44 hours

No smoke near the ground through Mon 2 AM.

SatSun

Precipitation

What has fallen at Tysons

0.29 in in the last 24 hours, 0.33 in over the last 3 days, to Sat 6 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.29in
Last 3 days
0.33in

Visibility

How far you can see at Tysons, the next 44 hours

Visibility stays 10 miles or more through Mon 2 AM.

SatSun

On the radar over Tysons, VirginiaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest Tysons, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.4 miles away.

measured now3 instruments

measured daily2 instruments

Mclean 2.1 WVA-FX-10

In a volunteer observer's own ground/1.4 mi away/364 ft/124 ft below here

precip, snowfall, snow depth

Rank-

Dunn LoringDNLV2

At a cooperative observer's station/1.8 mi away/489 ft/1 ft above here

snowfall, snow depth, precip, high, low

Rank1,553of 1,554

Station report

The weather at Washington/Dulles, drawn

The nearest airport reporting now, 11.7 mi from Tysons, Virginia. From its report of Oct 17, 2026, 6:52 AM local time: 3 of its 6 sheets.

The sky

A few clouds at 1,500 ft, scattered at 4,900 ft, broken at 6,000 ft, broken at 15,000 ft; the ceiling is 6,000 ft; visibility 10 mi or more.

Section of the sky over Washington/Dulles, height above the station to scale: a few clouds cloud with its base at 1,500 feet, scattered cloud with its base at 4,900 feet, broken cloud with its base at 6,000 feet, broken cloud with its base at 15,000 feet, the ceiling at 6,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IADFIG. A THE SKY OVER WASHINGTON/DULLESSECTION, 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 STATION05,00010,00015,00020,00025,000ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTBKN 15,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYBKN 6,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYSCT 4,900 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYFEW 1,500 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYCEILING 6,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWashington/Dulles, the skySTATION REPORT · ASOS IADTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-IAD-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

54.0 F with a dew point of 48.0 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 1,500 ft.

Chart of the air at Washington/Dulles: temperature 54.0 degrees Fahrenheit and dew point 48.0, 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 1,500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IADFIG. B THE AIR AT WASHINGTON/DULLESTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 FSATURATES 1,400 FT ABOVE THE STATION, AT 46.6 FLOWEST CLOUD REPORTED, FEW 1,500 FTTEMPERATURE 54.0 FDEW POINT 48.0 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 POINTTITLEWashington/Dulles, the airSTATION REPORT · ASOS IADTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-IAD-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (330 degrees) at 10 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 21 mph.

Plan of the wind at Washington/Dulles, north up: blowing from 330 degrees, the north northwest, at 10 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IADFIG. C THE WIND AT WASHINGTON/DULLESPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 330°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWashington/Dulles, the windSTATION REPORT · ASOS IADTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-IAD-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Dunn Loring (DNLV2), 1.8 miles from here, read 17 Oct, 07:00. measured daily

Elsewhere in Virginia

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

Near Tysons

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

Near Tysons

River and lake gauges