Storm Station
Groveland, California
67°
Partly cloudy· Feels like 67°·Light air 1 mph NW
Partly cloudy. Low around 62, with temperatures rising to around 64 overnight. Southeast wind around 5 mph.
-UV
-Air quality
41%Humidity
38%Cloud

What is measuring near here

The 5 instruments nearest Groveland, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.3 miles away.

measured now3 instruments

Big Oak Flat 2SW - West PortalWPTC1

At a river or reservoir gauge/3.0 mi away/2,070 ft/1,195 ft below here

temp, wind, gust, humidity, pressure

Rank1,622of 3,118

ColumbiaO22

At an airfield/17.1 mi away/2,119 ft/1,146 ft below here

temp, wind, gust, visibility, precip, pressure

Rank3,064of 3,118

Yosemite Village 12 W53150

At a climate reference station/23.3 mi away/6,620 ft/3,355 ft above here

temp, humidity, wind, solar, precip

Rank-

measured daily2 instruments

Groveland 2GROC1

At a cooperative observer's station/1.3 mi away/2,723 ft/542 ft below here

snowfall, snow depth, precip, high, low

Rank-

Tuolumne City 2.0 NCA-SS-5

In a volunteer observer's own ground/11.3 mi away/2,936 ft/329 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Columbia, drawn

The nearest airport reporting now, 17.1 mi from Groveland. From its report of Sep 27, 2026, 2:55 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 Columbia, 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 O22FIG. A THE SKY OVER COLUMBIASECTION, 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 MORE0510TITLEColumbia, the skySTATION REPORT · ASOS O22TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-O22-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

55.4 F with a dew point of 42.8 F, 62 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,900 ft up.

Chart of the air at Columbia: temperature 55.4 degrees Fahrenheit and dew point 42.8, 62 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,900 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT O22FIG. B THE AIR AT COLUMBIATHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00030 F40 F50 F60 F70 FSATURATES 2,900 FT ABOVE THE STATION, AT 40.0 FTEMPERATURE 55.4 FDEW POINT 42.8 FSPREAD 12.6 FRELATIVE HUMIDITY 62 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 POINTTITLEColumbia, the airSTATION REPORT · ASOS O22TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-O22-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Columbia, 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 O22FIG. C THE WIND AT COLUMBIAPLAN, 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 FORCE73TITLEColumbia, the windSTATION REPORT · ASOS O22TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-O22-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-in

Snow on the ground

Elsewhere in California

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

Near Groveland

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