Temperature
69 F at 4 AM; 69 F at its warmest, 4 AM, and 53 F at its coolest, 7 AM Thursday.
- Now
- 69F
- 4 AM
- Highest
- 69F
- 4 AM
- Lowest
- 53F
- 7 AM Thursday
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Airports/Pennsylvania/Allegheny County Airport
Coming up. Rain is likely this afternoon, from about 1 PM (67%).
Now. Allegheny County Airport is 71° and overcast at 9 AM. The dew point is 64°, so the air feels humid and sticky. Gentle breeze from the southwest at 11 mph.
Today and tonight. It warms to about 72° by 11 AM. Tonight falls to about 41° by 7 AM, under cloud. Air quality is moderate (index 65): fine for most people, though people unusually sensitive to air pollution may feel it outdoors.
The week. The warmest day ahead is Tuesday, near 65°, and the coolest tomorrow, near 51°. The days ahead look dry. The first freeze could come Sunday, a low of 32°.
The sky tonight. The sun sets at 6:39 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:32 PM. The next full Moon is Monday, Oct 26. After dark, look for Saturn, bright in the east-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. Cloud is forecast to cover most of the night, so the sky will be hard to see. The day is 11 hours 9 minutes long, 3 minutes shorter than yesterday.
As of 9:00 AM in Allegheny County Airport, Pennsylvania.
Air quality
Index 65, moderate, led by fine particles. Read at 9 AM from its reporting area, Mon Valley Area (PA), 4 miles off.
Good each day through Sun Oct 18, led by fine particles. Yesterday measured 29, good.
Little smoke near the ground through Sun 2 AM: the index from smoke stays at 6 or under.
Precipitation
None in the last 24 hours; 0.28 in over the last 3 days, to Fri 8 AM. Measured by radar and rain gauges, as water.
Visibility
Visibility stays 4 miles or more through Sun 2 AM, lowest 5 miles Fri 10 PM.
F
Now, today, and the week
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 10 / 28 | 6,501 ft | 150 ft | Concrete | 90° / 270° | 6 mph head, on 28 | 10 mph from the left |
| 13 / 31 | 3,825 ft | 100 ft | Concrete | 120° / 300° | 0 mph head, on 13 | 12 mph from the right |
| H1 / H1 unlit | 47 ft | 45 ft | Concrete | - | - | - |
Measured here
Every hour from Pittsburgh/Alleghen (AGC), Allegheny County Airport's own instrument, measure by measure, on the field's own clock.
69 F at 4 AM; 69 F at its warmest, 4 AM, and 53 F at its coolest, 7 AM Thursday.
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
A dew point of 68 F, the air 97% saturated; the humidity ran from 75% at 11 AM Thursday to 99% at 1 AM.
How it is measured: Humidity variables, Field Book FB-WAT-002
10 mph from the south at 4 AM; at its strongest 11 mph, 2 AM, with a gust of 16 mph at 1 AM.
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
29.84 inHg at 4 AM, falling 0.04 inHg over 3 hours; 0.33 inHg lower than a day before.
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Down to 2 miles at 1 AM; 7 miles now.
How it is measured: Fog types, Field Book FB-WAT-020
The lowest cloud base came down to 200 ft at 1 AM; a base was reported in 23 of the hours.
How it is measured: Cloud classification, Field Book FB-SKY-001
None measured in the gauge in the last 24 hours.
How it is measured: ASOS, Field Book FB-INS-002
Pittsburgh/Alleghen: every reading, the last 7 days, 30 days and the year, and how well it reports
The 4 instruments nearest Allegheny County Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.
measured now2 instruments
At an airfield/0.4 mi away/1,253 ft/1 ft above here
temp, wind, gust, visibility, precip, pressure
I-376 W/B @ Exit 10A Churchill A PA US PADOTPA064
Beside a road/8.1 mi away/1,030 ft/222 ft below here
temp, pavement temp, wind, visibility, precip
measured daily2 instruments
West Mifflin 2.3 SWPA-AL-50
In a volunteer observer's own ground/1.5 mi away/1,129 ft/123 ft below here
precip, snowfall, snow depth
At a dam/4.5 mi away/732 ft/520 ft below here
snowfall, snow depth, precip, high, low
0in
Snow on the ground
Measured at Braddock Lock And Dam (BDDP1), 4.5 miles from here, read 16 Oct, 06:00. measured daily
24 places, each with its own forecast and its own instruments.
The nearest places, each with its own forecast and the instruments nearest it.