Flood Warning — Allegheny County, PA, Beaver County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV 2:45 PM

Allegheny County, Pennsylvania, United States

Last updated: 2:03 PM CDT  ·  Refresh
22°C
Feels like 24°
Mostly Cloudy
▲ 23°  /  ▼ 15°
Wind
4 mph N
Humidity
87%
Dew Point
20°
Pressure
29.01 inHg
Visibility
8 mi
UV Index
5.2
Cloud Cover
81%
Sunrise
6:35 AM
Sunset
8:10 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Allegheny County is currently mostly cloudy at 22°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 534 J/kg) — isolated convective development possible. Sunrise: 6:35AM · Sunset: 8:10PM.

Alerts

Flood Warning
Allegheny County, PA, Beaver County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV
Expires 2:45 PM
39 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
22°
47%
4 PM
23°
45%
5 PM
22°
44%
6 PM
23°
42%
7 PM
22°
20%
8 PM
21°
15%
9 PM
20°
15%
10 PM
19°
3%
11 PM
18°
3%
12 AM
18°
3%
1 AM
17°
6%
2 AM
17°
6%
3 AM
17°
6%
4 AM
16°
15%
5 AM
16°
16%
6 AM
15°
16%
7 AM
15°
16%
8 AM
16°
16%
9 AM
16°
18%
10 AM
18°
13%
11 AM
18°
23%
12 PM
19°
23%
1 PM
21°
23%
2 PM
24°
26%
7-Day Forecast
Today
23° 15°
Mostly Cloudy with a 47% chance of rain.
Fri
26° 15°
Mostly Clear with a 26% chance of rain.
Sat
29° 17°
Clear with a 64% chance of rain.
Sun
24° 16°
Mostly Cloudy with a 69% chance of rain.
Mon
25° 13°
Clear with a 21% chance of rain.
Tue
28° 14°
Drizzle, 70% chance.
Wed
26° 16°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 22° Mostly Cloudy 47% 4 mph N 87%
4 PM 23° Mostly Cloudy 45% 6 mph NNE 84%
5 PM 22° Mostly Cloudy 44% 5 mph NNE 82%
6 PM 23° Mostly Cloudy 42% 5 mph NNE 85%
7 PM 22° Partly Cloudy 20% 5 mph NE 87%
8 PM 21° Clear 15% 5 mph NE 90%
9 PM 20° Mostly Clear 15% 4 mph NE 92%
10 PM 19° Mostly Clear 3% 4 mph ENE 93%
11 PM 18° Mostly Clear 3% 4 mph ENE 94%
12 AM 18° Mostly Clear 3% 3 mph ENE 94%
1 AM 17° Mostly Clear 6% 3 mph NE 95%
2 AM 17° Partly Cloudy 6% 3 mph NE 95%
3 AM 17° Fog 6% 3 mph NE 95%
4 AM 16° Fog 15% 3 mph NE 95%
5 AM 16° Fog 16% 3 mph NE 95%
6 AM 15° Fog 16% 3 mph NE 94%
7 AM 15° Fog 16% 3 mph ENE 93%
8 AM 16° Fog 16% 4 mph ENE 92%
9 AM 16° Fog 18% 4 mph ENE 86%
10 AM 18° Fog 13% 5 mph ENE 81%
11 AM 18° Fog 23% 5 mph ENE 76%
12 PM 19° Mostly Clear 23% 5 mph ENE 71%
1 PM 21° Mostly Clear 23% 5 mph ENE 66%
2 PM 24° Clear 26% 6 mph ENE 61%
15-Day Forecast
Today
8/20
Mostly Cloudy
47%
15°
23°
Fri
8/21
Mostly Clear
26%
15°
26°
Sat
8/22
Clear
64%
17°
29°
Sun
8/23
Mostly Cloudy
69%
16°
24°
Mon
8/24
Clear
21%
13°
25°
Tue
8/25
Drizzle
70%
14°
28°
Wed
8/26
Rain
63%
16°
26°
Thu
8/27
Rain
69%
17°
28°
Fri
8/28
Rain
68%
17°
28°
Sat
8/29
Drizzle
51%
18°
29°
Sun
8/30
Drizzle
60%
19°
28°
Mon
8/31
Drizzle
60%
18°
28°
Tue
9/1
Drizzle
60%
18°
28°
Wed
9/2
Drizzle
60%
17°
28°
Thu
9/3
Drizzle
60%
17°
28°
39
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
39 AQI 7.1 µg/m³
O3
Ground-level ozone
31 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 39 Good 31 39
Sat 37 Good 37 25
Sun 49 Good 44 49
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 Thu Aug 20, 17:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 80 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE530 J/kg
MLCAPE250 J/kg
MUCAPE530 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-2.1
Kinematics
0–6 km Shear38 kt
0–1 km Shear6 kt
Eff. Shear30 kt
0–1 km SRH0
0–3 km SRH42
Eff. SRH42
Storm Motion288° @ 27 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.3
K-Index31.4
Thermo & Levels
PWAT1.73 in
0–3 km LR5.9 °C/km
700–500 LR5.2 °C/km
Total Totals43.6
LCL954 hPa
LFC982 hPa
EL342 hPa
Freezing Lvl12,369 ft