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Cathlamet, Washington

Town in Wahkiakum County, Washington

Air quality

The air at Cathlamet

Index 47, good, led by fine particles. Read at 11 PM from its reporting area, Longview (WA), 21 miles off.

47Good
  • Fine particles (PM2.5)47Good-

The days ahead

Good each day through Fri Oct 16, led by fine particles. Yesterday measured 17, good.

Smoke, the next 43 hours

Little smoke near the ground through Sat 5 PM: the index from smoke stays at 11 or under.

FriSat

Precipitation

What has fallen at Cathlamet

None in the last 24 hours; 0.03 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.03in

Visibility

How far you can see at Cathlamet, the next 43 hours

Dense fog: visibility falls to 0.1 miles Fri 9 PM, under a mile for 5 hours.

FriSat

On the radar over Cathlamet, WashingtonReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Cathlamet, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.8 miles away.

measured now4 instruments

measured daily2 instruments

Cathlamet 0.8 SWA-WK-3

In a volunteer observer's own ground/0.8 mi away/11 ft/149 ft below here

precip, snowfall, snow depth

Rank-

Cathlamet 6NECTHW1

At a cooperative observer's station/5.7 mi away/185 ft/25 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Kelso-Longveiw AWOS, drawn

The nearest airport reporting now, 23.7 mi from Cathlamet, Washington. From its report of Oct 15, 2026, 10:56 PM 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 Kelso-Longveiw AWOS, 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 KLSFIG. A THE SKY OVER KELSO-LONGVEIW AWOSSECTION, 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 MORE0510TITLEKelso-Longveiw AWOS, the skySTATION REPORT · ASOS KLSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-KLS-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

50.0 F with a dew point of 47.0 F, 89 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 700 ft up.

Chart of the air at Kelso-Longveiw AWOS: temperature 50.0 degrees Fahrenheit and dew point 47.0, 89 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 700 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT KLSFIG. B THE AIR AT KELSO-LONGVEIW AWOSTHE 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 700 FT ABOVE THE STATION, AT 46.3 FTEMPERATURE 50.0 FDEW POINT 47.0 FSPREAD 3.0 FRELATIVE HUMIDITY 89 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 POINTTITLEKelso-Longveiw AWOS, the airSTATION REPORT · ASOS KLSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-KLS-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 Kelso-Longveiw AWOS, 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 KLSFIG. C THE WIND AT KELSO-LONGVEIW AWOSPLAN, 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 FORCE73TITLEKelso-Longveiw AWOS, the windSTATION REPORT · ASOS KLSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-KLS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Kelso-Longveiw AWOS, in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Washington

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

Near Cathlamet

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

Near Cathlamet

River and lake gauges