Storm Station
Prosser, Washington
56°
Mostly clear· Feels like 56°·Light air 2 mph ENE
Mostly cloudy. Low around 45, with temperatures rising to around 48 overnight. West wind 1 to 7 mph.
-UV
-Air quality
25%Humidity
30%Cloud

What is measuring near here

The 5 instruments nearest Prosser, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.5 miles away.

measured now3 instruments

ProsserTPROS

Beside a road/1.4 mi away/614 ft/54 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

Sunnyside1S5

At an airfield/12.8 mi away/754 ft/86 ft above here

temp, wind, gust, visibility, precip, pressure

Rank610of 618

measured daily2 instruments

Prosser 0.4 SSEWA-BT-10

In a volunteer observer's own ground/0.5 mi away/771 ft/103 ft above here

precip, snowfall, snow depth

Rank-

ProsserPRSW1

At a cooperative observer's station/0.6 mi away/802 ft/134 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Sunnyside, drawn

The nearest airport reporting now, 12.8 mi from Prosser. From its report of Sep 27, 2026, 1:35 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 Sunnyside, 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 1S5FIG. A THE SKY OVER SUNNYSIDESECTION, 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 MORE0510TITLESunnyside, the skySTATION REPORT · ASOS 1S5TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-1S5-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

42.0 F with a dew point of 39.2 F, 90 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 600 ft up.

Chart of the air at Sunnyside: temperature 42.0 degrees Fahrenheit and dew point 39.2, 90 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 600 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 1S5FIG. B THE AIR AT SUNNYSIDETHE 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 FSATURATES 600 FT ABOVE THE STATION, AT 38.6 FTEMPERATURE AND DEW POINT 42.0 F, 39.2 FRELATIVE HUMIDITY 90 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 POINTTITLESunnyside, the airSTATION REPORT · ASOS 1S5TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-1S5-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Sunnyside, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 1S5FIG. C THE WIND AT SUNNYSIDEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESunnyside, the windSTATION REPORT · ASOS 1S5TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-1S5-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Sunnyside, 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 Prosser

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