Storm Station
Blackhawk, California
55° 67°/52°
Overcast· Feels like 55°·Light air 4 mph NW
Mostly cloudy, with a low around 52. Southwest wind around 3 mph.
0UV Low
51Air quality
84%Humidity
94%Cloud
Now
12:45 AM
55feels55
now, overcast
Today
Sep 27
6752
14mph
UV 6
fog
Mon
Sep 28
7950
UV 6
overcast
Tue
Sep 29
9055
UV 6
mostly clear day
Wed
Sep 30
9461
UV 6
clear day
Thu
Oct 1
9361
UV 6
partly cloudy day
Fri
Oct 2
9762
UV 6
partly cloudy day
Sat
Oct 3
10068
UV 6
overcast
55°
67°52°
79°50°
90°55°
94°61°
93°61°
97°62°
100°68°

As of 12:45 AM in Blackhawk, California.

What is measuring near here

The 4 instruments nearest Blackhawk, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.2 miles away.

measured now2 instruments

BlackhawkBHWC1

At a river or reservoir gauge/2.9 mi away/1,804 ft/923 ft above here

temp, wind, gust, humidity, pressure

Rank577of 3,115

LivermoreLVK

At an airfield/9.3 mi away/387 ft/494 ft below here

temp, wind, gust, visibility, precip, pressure

Rank7of 3,115

measured daily2 instruments

Danville 4.9 ESECA-CC-20

In a volunteer observer's own ground/1.2 mi away/724 ft/157 ft below here

precip, snowfall, snow depth

Rank-

Diablo - Mount DiabloMDJC1

At a cooperative observer's station/5.1 mi away/3,102 ft/2,221 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Livermore, drawn

The nearest airport reporting now, 9.3 mi from Blackhawk. From its report of Sep 26, 2026, 11:53 PM 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 Livermore, 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 LVKFIG. A THE SKY OVER LIVERMORESECTION, 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 MORE0510TITLELivermore, the skySTATION REPORT · ASOS LVKTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-LVK-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

58.0 F with a dew point of 50.0 F, 75 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,900 ft up.

Chart of the air at Livermore: temperature 58.0 degrees Fahrenheit and dew point 50.0, 75 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,900 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LVKFIG. B THE AIR AT LIVERMORETHE 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 1,900 FT ABOVE THE STATION, AT 48.1 FTEMPERATURE 58.0 FDEW POINT 50.0 FSPREAD 8.0 FRELATIVE HUMIDITY 75 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 POINTTITLELivermore, the airSTATION REPORT · ASOS LVKTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-LVK-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Livermore, north up: blowing from 310 degrees, the 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 LVKFIG. C THE WIND AT LIVERMOREPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLELivermore, the windSTATION REPORT · ASOS LVKTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-LVK-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Livermore, 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 Blackhawk

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