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Sierra Ridge, Colorado

Community in Douglas County, Colorado

Air quality

The air at Sierra Ridge

Index 55, moderate, led by fine particles. Read at 1 AM from its reporting area, Denver-Boulder (CO), 28 miles off.

55Moderate
  • Fine particles (PM2.5)55Moderate15.8 mi
  • Ozone28Good28 ppb7.8 mi
  • Coarse particles (PM10)12Good-
  • Nitrogen dioxide8Good9.1 ppb17.4 mi
  • Sulfur dioxide0Good0.4 ppb17.7 mi
  • Carbon monoxide-0.2 ppm17.4 mi

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 30, good.

Smoke, the next 41 hours

No smoke near the ground through Sat 6 PM.

FriSat

Precipitation

What has fallen at Sierra Ridge

0.05 in in the last 24 hours, 0.19 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.05in
Last 3 days
0.19in

Visibility

How far you can see at Sierra Ridge, the next 41 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

On the radar over Sierra Ridge, ColoradoReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Sierra Ridge, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.6 miles away.

measured now4 instruments

FranktownFKTC2

At a river or reservoir gauge/10.1 mi away/6,221 ft/274 ft above here

temp, wind, gust, humidity, pressure

Rank648of 2,650

measured daily2 instruments

LonetreeLNTC2

At a cooperative observer's station/4.4 mi away/5,906 ft/41 ft below here

snowfall, snow depth, precip, high, low

Rank1,550of 2,650

Station report

The weather at Denver/Centennial, drawn

The nearest airport reporting now, 3.4 mi from Sierra Ridge, Colorado. From its report of Oct 16, 2026, 1:53 AM local time: 3 of its 6 sheets.

The sky

Overcast at 3,600 ft; the ceiling is 3,600 ft; visibility 10 mi or more.

Section of the sky over Denver/Centennial, height above the station to scale: overcast cloud with its base at 3,600 feet, the ceiling at 3,600 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT APAFIG. A THE SKY OVER DENVER/CENTENNIALSECTION, 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 STATION01,0002,0003,0004,0005,0006,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 3,600 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 3,600 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEDenver/Centennial, the skySTATION REPORT · ASOS APATYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-APA-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

38.0 F with a dew point of 27.0 F, 64 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,500 ft up; the lowest cloud reported is at 3,600 ft.

Chart of the air at Denver/Centennial: temperature 38.0 degrees Fahrenheit and dew point 27.0, 64 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,500 feet above the station, against the lowest cloud reported at 3,600 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT APAFIG. B THE AIR AT DENVER/CENTENNIALTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00010 F20 F30 F40 F50 FSATURATES 2,500 FT ABOVE THE STATION, AT 24.7 FLOWEST CLOUD REPORTED, OVC 3,600 FTTEMPERATURE 38.0 FDEW POINT 27.0 FSPREAD 11.0 FRELATIVE HUMIDITY 64 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 POINTTITLEDenver/Centennial, the airSTATION REPORT · ASOS APATYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-APA-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northeast (20 degrees) at 7 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Denver/Centennial, north up: blowing from 20 degrees, the north northeast, 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 APAFIG. C THE WIND AT DENVER/CENTENNIALPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 20°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 7 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEDenver/Centennial, the windSTATION REPORT · ASOS APATYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-APA-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Lonetree (LNTC2), 4.4 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in Colorado

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

Near Sierra Ridge

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

Near Sierra Ridge

River and lake gauges