Storm Station
Alleghany, California
60°
Partly cloudy· Feels like 60°·Light air 3 mph ESE
Mostly cloudy. High near 64, with temperatures falling to around 62 in the afternoon. South southeast wind 2 to 7 mph.
-UV
-Air quality
50%Humidity
68%Cloud

What is measuring near here

The 5 instruments nearest Alleghany, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 6.4 miles away.

measured now3 instruments

DownievilleDNVC1

At a river or reservoir gauge/6.4 mi away/2,913 ft/1,489 ft below here

temp, wind, gust, humidity, pressure

Rank57of 3,128

Hwy 80 at Blue CanyonCD025

Beside a road/14.8 mi away/5,312 ft/910 ft above here

temp, pavement temp, wind, visibility, precip

Rank2,677of 3,128

Blue Canyon - NyackBLU

At an airfield/15.1 mi away/5,285 ft/883 ft above here

temp, wind, gust, visibility, precip, pressure

Rank41of 3,128

measured daily2 instruments

DownievilleDWNC1

At a cooperative observer's station/6.7 mi away/3,166 ft/1,236 ft below here

snowfall, snow depth, precip, high, low

Rank-

Nevada City 6.0 NNECA-NV-60

In a volunteer observer's own ground/11.3 mi away/2,695 ft/1,707 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Blue Canyon - Nyack, drawn

The nearest airport reporting now, 15.1 mi from Alleghany. From its report of Sep 27, 2026, 6:52 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 Blue Canyon - Nyack, 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 BLUFIG. A THE SKY OVER BLUE CANYON - NYACKSECTION, 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 MORE0510TITLEBlue Canyon - Nyack, the skySTATION REPORT · ASOS BLUTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-BLU-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

57.0 F with a dew point of 36.0 F, 45 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 4,800 ft up.

Chart of the air at Blue Canyon - Nyack: temperature 57.0 degrees Fahrenheit and dew point 36.0, 45 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 4,800 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BLUFIG. B THE AIR AT BLUE CANYON - NYACKTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,00020 F30 F40 F50 F60 F70 FSATURATES 4,800 FT ABOVE THE STATION, AT 31.6 FTEMPERATURE 57.0 FDEW POINT 36.0 FSPREAD 21.0 FRELATIVE HUMIDITY 45 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 POINTTITLEBlue Canyon - Nyack, the airSTATION REPORT · ASOS BLUTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-BLU-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

At 7 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Blue Canyon - Nyack, north up: 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 BLUFIG. C THE WIND AT BLUE CANYON - NYACKPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONDIRECTION NOT REPORTEDBEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 7 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEBlue Canyon - Nyack, the windSTATION REPORT · ASOS BLUTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-BLU-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Blue Canyon - Nyack, 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 Alleghany

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