Storm Station
Montalvin Manor, California
56°
Overcast· Feels like 56°·Light breeze 7 mph S
Mostly sunny. High near 66, with temperatures falling to around 64 in the afternoon. South southwest wind 8 to 12 mph.
-UV
-Air quality
83%Humidity
76%Cloud

What is measuring near here

The 4 instruments nearest Montalvin Manor, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.5 miles away.

measured now2 instruments

Boony Doon FireBONC1

At a river or reservoir gauge/7.0 mi away/69 ft/24 ft above here

temp, wind, gust, humidity, pressure

Rank478of 3,127

Napa CountyAPC

At an airfield/14.8 mi away/26 ft/19 ft below here

temp, wind, gust, visibility, precip, pressure

Rank2,675of 3,127

measured daily2 instruments

El Sobrante 1.6 SWCA-CC-52

In a volunteer observer's own ground/2.5 mi away/144 ft/99 ft above here

precip, snowfall, snow depth

Rank-

Richmond - Waste Water PlantRICC1

At a cooperative observer's station/6.0 mi away/11 ft/34 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Napa County, drawn

The nearest airport reporting now, 14.8 mi from Montalvin Manor. From its report of Sep 27, 2026, 5:54 AM local time: 3 of its 6 sheets.

The sky

Overcast at 1,300 ft; the ceiling is 1,300 ft; visibility 10 mi or more.

Section of the sky over Napa County, height above the station to scale: overcast cloud with its base at 1,300 feet, the ceiling at 1,300 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT APCFIG. A THE SKY OVER NAPA COUNTYSECTION, 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 SHEETOVC 1,300 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 1,300 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLENapa County, the skySTATION REPORT · ASOS APCTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-APC-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

55.0 F with a dew point of 52.0 F, 90 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 700 ft up; the lowest cloud reported is at 1,300 ft.

Chart of the air at Napa County: temperature 55.0 degrees Fahrenheit and dew point 52.0, 90 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 700 feet above the station, against the lowest cloud reported at 1,300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT APCFIG. B THE AIR AT NAPA COUNTYTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 F70 FSATURATES 700 FT ABOVE THE STATION, AT 51.3 FLOWEST CLOUD REPORTED, OVC 1,300 FTTEMPERATURE 55.0 FDEW POINT 52.0 FSPREAD 3.0 FRELATIVE HUMIDITY 90 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 POINTTITLENapa County, the airSTATION REPORT · ASOS APCTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-APC-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (330 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Napa County, north up: blowing from 330 degrees, the north northwest, 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 APCFIG. C THE WIND AT NAPA COUNTYPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 330°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLENapa County, the windSTATION REPORT · ASOS APCTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-APC-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Napa County, 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 Montalvin Manor

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