Storm Station
Altona, Colorado
71°
Mostly clear· Feels like 71°·Light breeze 5 mph SSE
A slight chance of rain showers after 3pm. Mostly sunny. High near 80, with temperatures falling to around 77 in the afternoon. South southeast wind 2 to 7 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
-UV
-Air quality
31%Humidity
36%Cloud

What is measuring near here

The 6 instruments nearest Altona, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now4 instruments

BoulderBDU

At an airfield/6.8 mi away/5,289 ft/736 ft below here

temp, wind, gust, visibility, precip, pressure

Rank919of 1,384

Saint Vrain Creek 1 SE LyonsLNSC2

At a river or reservoir gauge/7.0 mi away/5,417 ft/608 ft below here

temp, wind, gust, humidity, pressure

Rank236of 1,384

Ward (35)CO044

Beside a road/10.9 mi away/9,155 ft/3,130 ft above here

temp, pavement temp, wind, visibility, precip

Rank1,359of 1,384

Boulder 14 W94075

At a climate reference station/14.4 mi away/9,828 ft/3,803 ft above here

temp, humidity, wind, solar, precip

Rank-

measured daily2 instruments

Lyons 7STHUC2

At a cooperative observer's station/0.4 mi away/5,735 ft/290 ft below here

snowfall, snow depth, precip, high, low

Rank-

Boulder 7.3 NNWCO-BO-566

In a volunteer observer's own ground/0.4 mi away/6,061 ft/36 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Boulder, drawn

The nearest airport reporting now, 6.8 mi from Altona. From its report of Sep 27, 2026, 7:55 AM local time: 3 of its 6 sheets.

The sky

Broken at 11,000 ft; the ceiling is 11,000 ft; visibility 10 mi or more.

Section of the sky over Boulder, height above the station to scale: broken cloud with its base at 11,000 feet, the ceiling at 11,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BDUFIG. A THE SKY OVER BOULDERSECTION, 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 STATION02,5005,0007,50010,00012,50015,00017,500ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTBKN 11,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 11,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEBoulder, the skySTATION REPORT · ASOS BDUTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-BDU-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-013, FB-SKY-014

The air

68.0 F with a dew point of 37.4 F, 32 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 6,900 ft up; the lowest cloud reported is at 11,000 ft.

Chart of the air at Boulder: temperature 68.0 degrees Fahrenheit and dew point 37.4, 32 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 6,900 feet above the station, against the lowest cloud reported at 11,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BDUFIG. B THE AIR AT BOULDERTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION02,0004,0006,0008,00010,00012,00014,00020 F30 F40 F50 F60 F70 F80 FSATURATES 6,900 FT ABOVE THE STATION, AT 31.0 FLOWEST CLOUD REPORTED, BKN 11,000 FTTEMPERATURE 68.0 FDEW POINT 37.4 FSPREAD 30.6 FRELATIVE HUMIDITY 32 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 POINTTITLEBoulder, the airSTATION REPORT · ASOS BDUTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-BDU-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the southwest (220 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Boulder, north up: blowing from 220 degrees, the southwest, at 5 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 BDUFIG. C THE WIND AT BOULDERPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 220°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEBoulder, the windSTATION REPORT · ASOS BDUTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-BDU-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Lyons 7S (THUC2), 0.4 miles from here, read 27 Sep, 07:00. measured daily

Elsewhere in Colorado

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

Near Altona

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