Freeze Watch 8:00 AM

Allegheny County, Pennsylvania, United States

Last updated: 11:19 PM CDT  ·  Refresh
10°C
Feels like 8°
Overcast
▲ 11°  /  ▼ 2°
Wind
11 mph NNW
Humidity
87%
Dew Point
8°
Pressure
29.05 inHg
Visibility
8 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 87% around 12 AM. Sunrise: 7:33AM · Sunset: 6:36PM.

Alerts

Freeze Watch
Expires 8:00 AM
31 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
10°
87%
1 AM
9°
35%
2 AM
9°
14%
3 AM
9°
19%
4 AM
9°
25%
5 AM
8°
21%
6 AM
7°
27%
7 AM
6°
22%
8 AM
6°
4%
9 AM
6°
5%
10 AM
7°
5%
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
8°
3%
9 PM
8°
3%
10 PM
7°
3%
11 PM
7°
3%
7-Day Forecast
Today
11° 2°
Mostly Clear with a 87% chance of rain.
Sun
17° 2°
Clear.
Mon
21° 3°
Clear.
Tue
22° 4°
Partly Cloudy.
Wed
21° 4°
Clear.
Thu
21° 4°
Clear.
Fri
22° 6°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 10° Overcast 87% 11 mph NNW 87%
1 AM 9° Overcast 35% 10 mph NNW 83%
2 AM 9° Overcast 14% 10 mph NNW 82%
3 AM 9° Overcast 19% 10 mph NNW 82%
4 AM 9° Overcast 25% 10 mph NNW 82%
5 AM 8° Overcast 21% 10 mph NNW 82%
6 AM 7° Overcast 27% 10 mph N 81%
7 AM 6° Mostly Cloudy 22% 10 mph N 80%
8 AM 6° Partly Cloudy 4% 11 mph N 78%
9 AM 6° Partly Cloudy 5% 11 mph N 71%
10 AM 7° Partly Cloudy 5% 11 mph N 64%
11 AM 8° Partly Cloudy 3% 11 mph N 59%
12 PM 8° Partly Cloudy 3% 10 mph N 54%
1 PM 9° Mostly Clear 3% 9 mph N 50%
2 PM 11° Mostly Clear 3% 8 mph N 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 NNW 62%
8 PM 8° Clear 3% 5 mph NNW 65%
9 PM 8° Clear 3% 5 mph NNW 66%
10 PM 7° Clear 3% 4 mph NNW 67%
11 PM 7° Clear 3% 4 mph NNW 68%
15-Day Forecast
Today
10/17
Mostly Clear
87%
2°
11°
Sun
10/18
Clear
3%
2°
17°
Mon
10/19
Clear
7%
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°
22°
Sat
10/24
Clear
3%
5°
21°
Sun
10/25
Clear
3%
6°
22°
Mon
10/26
Clear
19%
3°
19°
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, 03:00'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
SBCAPE33 J/kg
MLCAPE12 J/kg
MUCAPE0 J/kg
SBCIN-6 J/kg
MLCIN-1 J/kg
Lifted Index11.7
Kinematics
0–6 km Shear90 kt
0–1 km Shear19 kt
Eff. Shear—
0–1 km SRH-178
0–3 km SRH-9
Eff. SRH—
Storm Motion266° @ 38 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index15.4
Thermo & Levels
PWAT0.88 in
0–3 km LR5.7 °C/km
700–500 LR3.4 °C/km
Total Totals30.6
LCL954 hPa
LFC933 hPa
EL802 hPa
Freezing Lvl4,816 ft