Storm Station
Grand Lake, Colorado
50°
Partly cloudy· Feels like 50°·Light breeze 6 mph W
Partly cloudy. Low around 35, with temperatures rising to around 38 overnight. South wind around 2 mph.
-UV
-Air quality
41%Humidity
55%Cloud

What is measuring near here

The 6 instruments nearest Grand Lake, 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

Grand LakeGLKC2

At a river or reservoir gauge/1.0 mi away/8,765 ft/327 ft above here

temp, wind, gust, humidity, pressure

Rank713of 1,384

GranbyGNB

At an airfield/12.0 mi away/8,208 ft/230 ft below here

temp, wind, gust, visibility, precip, pressure

Rank942of 1,384

Lily Lake (35)CO045

Beside a road/15.7 mi away/8,920 ft/482 ft above here

temp, pavement temp, wind, visibility, precip

Rank1,238of 1,384

Boulder 14 W94075

At a climate reference station/21.6 mi away/9,828 ft/1,390 ft above here

temp, humidity, wind, solar, precip

Rank-

measured daily2 instruments

Grand Lake .36 ECO-GR-19

In a volunteer observer's own ground/0.6 mi away/8,425 ft/13 ft below here

precip, snowfall, snow depth

Rank-

Grand LakeGLKC2

At a cooperative observer's station/1.0 mi away/8,793 ft/355 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Granby, drawn

The nearest airport reporting now, 12.0 mi from Grand Lake. From its report of Sep 27, 2026, 2:15 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 Granby, 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 GNBFIG. A THE SKY OVER GRANBYSECTION, 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 MORE0510TITLEGranby, the skySTATION REPORT · ASOS GNBTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-GNB-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

40.3 F with a dew point of 34.7 F, 80 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,300 ft up.

Chart of the air at Granby: temperature 40.3 degrees Fahrenheit and dew point 34.7, 80 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,300 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GNBFIG. B THE AIR AT GRANBYTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00020 F30 F40 F50 FSATURATES 1,300 FT ABOVE THE STATION, AT 33.4 FTEMPERATURE 40.3 FDEW POINT 34.7 FSPREAD 5.6 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 POINTTITLEGranby, the airSTATION REPORT · ASOS GNBTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-GNB-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (150 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Granby, north up: blowing from 150 degrees, the south southeast, at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GNBFIG. C THE WIND AT GRANBYPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 150°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEGranby, the windSTATION REPORT · ASOS GNBTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-GNB-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-in

Snow on the ground

Elsewhere in Colorado

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

Near Grand Lake

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