Freeze Warning — Tuscarawas, OH, Carroll, OH, Columbiana, OH, Coshocton, OH, Harrison, OH, Jefferson, OH, Muskingum, OH, Guernsey, OH, Belmont, OH, Noble, OH, Monroe, OH, Mercer, PA, Venango, PA, Forest, PA, Lawrence, PA, Butler, PA, Clarion, PA, Jefferson, PA, Beaver, PA, Allegheny, PA, Armstrong, PA, Washington, PA, Greene, PA, Westmoreland, PA, Westmoreland Ridges, PA, Fayette, PA, Fayette Ridges, PA, Indiana, PA, Higher Elevations of Indiana, PA, Hancock, WV, Brooke, WV, Ohio, WV, Marshall, WV, Wetzel, WV, Marion, WV, Monongalia, WV, Ridges of Eastern Monongalia and Northwestern Preston, WV, Preston, WV, Eastern Preston, WV, Western Tucker, WV, Eastern Tucker, WV 8:00 AM

Allegheny County, Pennsylvania, United States

Last updated: 12:14 AM CDT  ·  Refresh
9°C
Feels like 7°
Overcast
▲ 11°  /  ▼ 2°
Wind
10 mph NNW
Humidity
85%
Dew Point
7°
Pressure
29.07 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
97%
Sunrise
7:33 AM
Sunset
6:36 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Allegheny County is currently overcast at 10°C. Precipitation is likely — peak probability 58% around 1 AM. Sunrise: 7:33AM · Sunset: 6:36PM.

Alerts

Freeze Warning
Tuscarawas, OH, Carroll, OH, Columbiana, OH, Coshocton, OH, Harrison, OH, Jefferson, OH, Muskingum, OH, Guernsey, OH, Belmont, OH, Noble, OH, Monroe, OH, Mercer, PA, Venango, PA, Forest, PA, Lawrence, PA, Butler, PA, Clarion, PA, Jefferson, PA, Beaver, PA, Allegheny, PA, Armstrong, PA, Washington, PA, Greene, PA, Westmoreland, PA, Westmoreland Ridges, PA, Fayette, PA, Fayette Ridges, PA, Indiana, PA, Higher Elevations of Indiana, PA, Hancock, WV, Brooke, WV, Ohio, WV, Marshall, WV, Wetzel, WV, Marion, WV, Monongalia, WV, Ridges of Eastern Monongalia and Northwestern Preston, WV, Preston, WV, Eastern Preston, WV, Western Tucker, WV, Eastern Tucker, WV
Expires 8:00 AM
31 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
9°
57%
2 AM
9°
18%
3 AM
9°
23%
4 AM
9°
30%
5 AM
8°
34%
6 AM
7°
40%
7 AM
6°
31%
8 AM
6°
13%
9 AM
6°
13%
10 AM
7°
13%
11 AM
8°
3%
12 PM
8°
3%
1 PM
9°
3%
2 PM
11°
3%
3 PM
11°
3%
4 PM
11°
3%
5 PM
11°
3%
6 PM
10°
3%
7 PM
9°
3%
8 PM
9°
3%
9 PM
8°
3%
10 PM
8°
3%
11 PM
7°
3%
12 AM
7°
3%
7-Day Forecast
Today
11° 2°
Mostly Clear with a 57% chance of rain.
Sun
18° 2°
Clear.
Mon
21° 3°
Clear.
Tue
22° 4°
Partly Cloudy.
Wed
21° 4°
Clear.
Thu
21° 4°
Clear.
Fri
21° 6°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 9° Overcast 57% 10 mph NNW 85%
2 AM 9° Overcast 18% 10 mph NNW 82%
3 AM 9° Overcast 23% 10 mph NNW 82%
4 AM 9° Overcast 30% 10 mph NNW 82%
5 AM 8° Overcast 34% 10 mph NNW 82%
6 AM 7° Overcast 40% 10 mph N 81%
7 AM 6° Mostly Cloudy 31% 10 mph N 81%
8 AM 6° Partly Cloudy 13% 11 mph N 78%
9 AM 6° Partly Cloudy 13% 11 mph N 72%
10 AM 7° Partly Cloudy 13% 11 mph N 66%
11 AM 8° Partly Cloudy 3% 11 mph N 60%
12 PM 8° Partly Cloudy 3% 10 mph N 55%
1 PM 9° Partly Cloudy 3% 9 mph N 51%
2 PM 11° Mostly Clear 3% 8 mph NNW 48%
3 PM 11° Mostly Clear 3% 8 mph NNW 48%
4 PM 11° Clear 3% 8 mph NNW 48%
5 PM 11° Clear 3% 7 mph NNW 50%
6 PM 10° Clear 3% 6 mph NNW 56%
7 PM 9° Clear 3% 5 mph NW 62%
8 PM 9° Clear 3% 5 mph NW 65%
9 PM 8° Clear 3% 4 mph NNW 66%
10 PM 8° Clear 3% 4 mph NNW 67%
11 PM 7° Clear 3% 4 mph NNW 68%
12 AM 7° Clear 3% 4 mph NNW 71%
15-Day Forecast
Today
10/17
Mostly Clear
57%
2°
11°
Sun
10/18
Clear
18%
2°
18°
Mon
10/19
Clear
16%
3°
21°
Tue
10/20
Partly Cloudy
3%
4°
22°
Wed
10/21
Clear
3%
4°
21°
Thu
10/22
Clear
3%
4°
21°
Fri
10/23
Clear
3%
6°
21°
Sat
10/24
Clear
3%
4°
21°
Sun
10/25
Clear
3%
7°
22°
Mon
10/26
Clear
19%
7°
21°
Tue
10/27
Clear
25%
8°
19°
Wed
10/28
Drizzle
60%
7°
19°
Thu
10/29
Drizzle
60%
6°
18°
Fri
10/30
Drizzle
60%
7°
19°
Sat
10/31
Drizzle
60%
8°
17°
31
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
21 AQI 3.8 µg/m³
O3
Ground-level ozone
Dominant
31 AQI 34 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 31 Good 31 21
Sun 31 Good 31 3
Mon 21 Good 21 11
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Sat Oct 17, 04:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 90 100 110 120 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE28 J/kg
MLCAPE12 J/kg
MUCAPE0 J/kg
SBCIN-9 J/kg
MLCIN-1 J/kg
Lifted Index12.0
Kinematics
0–6 km Shear90 kt
0–1 km Shear21 kt
Eff. Shear—
0–1 km SRH-181
0–3 km SRH-47
Eff. SRH—
Storm Motion269° @ 37 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index15.2
Thermo & Levels
PWAT0.83 in
0–3 km LR5.7 °C/km
700–500 LR3.6 °C/km
Total Totals30.8
LCL955 hPa
LFC929 hPa
EL797 hPa
Freezing Lvl4,390 ft