Storm Station
Castle Shannon, Pennsylvania
55° 72°/51°
Clear· Feels like 55°·Light breeze 7 mph NNW
Mostly clear, with a low around 54. North wind around 9 mph.
0UV Low
31Air quality
79%Humidity
0%Cloud
Now
3:15 AM
55feels55
now, clear
Today
Sep 27
7251
23%
15mph
overcast
Mon
Sep 28
6458
overcast
Tue
Sep 29
7259
overcast
Wed
Sep 30
7757
overcast
Thu
Oct 1
8259
18%
overcast
Fri
Oct 2
6854
33%
drizzle
Sat
Oct 3
6248
32%
overcast
55°
72°51°
64°58°
72°59°
77°57°
82°59°
68°54°
62°48°

As of 3:15 AM in Castle Shannon, Pennsylvania.

What is measuring near here

The 4 instruments nearest Castle Shannon, 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 now2 instruments

Pittsburgh/AlleghenAGC

At an airfield/5.3 mi away/1,253 ft/200 ft above here

temp, wind, gust, visibility, precip, pressure

Rank49of 543

measured daily2 instruments

Pittsburgh 5.2 SPA-AL-29

In a volunteer observer's own ground/0.6 mi away/1,151 ft/98 ft above here

precip, snowfall, snow depth

Rank-

Braddock Lock And DamBDDP1

At a dam/8.7 mi away/732 ft/321 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Pittsburgh/Alleghen, drawn

The nearest airport reporting now, 5.3 mi from Castle Shannon. From its report of Sep 27, 2026, 2:53 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 Pittsburgh/Alleghen, 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 AGCFIG. A THE SKY OVER PITTSBURGH/ALLEGHENSECTION, 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 MORE0510TITLEPittsburgh/Alleghen, the skySTATION REPORT · ASOS AGCTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-AGC-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

54.0 F with a dew point of 47.0 F, 77 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,600 ft up.

Chart of the air at Pittsburgh/Alleghen: temperature 54.0 degrees Fahrenheit and dew point 47.0, 77 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,600 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT AGCFIG. B THE AIR AT PITTSBURGH/ALLEGHENTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 FSATURATES 1,600 FT ABOVE THE STATION, AT 45.4 FTEMPERATURE 54.0 FDEW POINT 47.0 FSPREAD 7.0 FRELATIVE HUMIDITY 77 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 POINTTITLEPittsburgh/Alleghen, the airSTATION REPORT · ASOS AGCTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-AGC-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (330 degrees) at 7 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Pittsburgh/Alleghen, north up: blowing from 330 degrees, the north northwest, 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 AGCFIG. C THE WIND AT PITTSBURGH/ALLEGHENPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 330°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 7 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPittsburgh/Alleghen, the windSTATION REPORT · ASOS AGCTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-AGC-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Braddock Lock And Dam (BDDP1), 8.7 miles from here, read 24 Sep, 06:00. measured daily

Elsewhere in Pennsylvania

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

Near Castle Shannon

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