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 Flood Warning — Greene County, PA, Washington County, PA, Brooke County, WV, Marshall County, WV, Ohio County, WV 2:45 PM

Washington County, Pennsylvania, United States

Last updated: 2:03 PM CDT  ·  Refresh
21°C
Feels like 23°
Overcast
▲ 23°  /  ▼ 15°
Wind
3 mph NNW
Humidity
87%
Dew Point
19°
Pressure
28.78 inHg
Visibility
6 mi
UV Index
4.1
Cloud Cover
89%
Sunrise
6:37 AM
Sunset
8:10 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Washington County is currently overcast at 21°C. Precipitation is likely — peak probability 68% around 3 PM. Atmospheric instability is elevated (CAPE up to 573 J/kg) — isolated convective development possible. Sunrise: 6:37AM · 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
Flood Warning
Greene County, PA, Washington County, PA, Brooke County, WV, Marshall County, WV, Ohio County, WV
Expires 2:45 PM
38 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
21°
68%
4 PM
22°
45%
5 PM
22°
44%
6 PM
23°
45%
7 PM
22°
23%
8 PM
21°
17%
9 PM
20°
16%
10 PM
19°
4%
11 PM
18°
3%
12 AM
17°
3%
1 AM
17°
6%
2 AM
16°
6%
3 AM
16°
6%
4 AM
16°
6%
5 AM
16°
8%
6 AM
15°
8%
7 AM
15°
21%
8 AM
15°
21%
9 AM
16°
25%
10 AM
17°
9%
11 AM
18°
19%
12 PM
19°
19%
1 PM
21°
19%
2 PM
24°
22%
7-Day Forecast
Today
23° 15°
Mostly Cloudy with a 68% chance of rain.
Fri
26° 15°
Fog with a 25% chance of rain.
Sat
28° 16°
Mostly Clear with a 64% chance of rain.
Sun
24° 14°
Mostly Cloudy with a 69% chance of rain.
Mon
24° 13°
Clear with a 21% chance of rain.
Tue
27° 13°
Drizzle, 70% chance.
Wed
25° 15°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 21° Overcast 68% 3 mph NNW 87%
4 PM 22° Partly Cloudy 45% 3 mph N 84%
5 PM 22° Rain 44% 7 mph NNE 86%
6 PM 23° Mostly Cloudy 45% 6 mph NNE 87%
7 PM 22° Partly Cloudy 23% 6 mph NNE 89%
8 PM 21° Mostly Clear 17% 6 mph NE 91%
9 PM 20° Mostly Clear 16% 5 mph NE 93%
10 PM 19° Mostly Clear 4% 4 mph NE 94%
11 PM 18° Mostly Clear 3% 4 mph ENE 95%
12 AM 17° Mostly Clear 3% 4 mph ENE 96%
1 AM 17° Partly Cloudy 6% 4 mph NE 97%
2 AM 16° Partly Cloudy 6% 4 mph NE 97%
3 AM 16° Fog 6% 4 mph NE 97%
4 AM 16° Fog 6% 4 mph NE 97%
5 AM 16° Fog 8% 5 mph NE 97%
6 AM 15° Fog 8% 5 mph ENE 96%
7 AM 15° Fog 21% 5 mph ENE 95%
8 AM 15° Fog 21% 5 mph ENE 94%
9 AM 16° Fog 25% 5 mph ENE 90%
10 AM 17° Fog 9% 6 mph ENE 86%
11 AM 18° Fog 19% 6 mph ENE 84%
12 PM 19° Mostly Clear 19% 6 mph ENE 78%
1 PM 21° Mostly Clear 19% 6 mph ENE 72%
2 PM 24° Clear 22% 7 mph ENE 66%
15-Day Forecast
Today
8/20
Mostly Cloudy
68%
15°
23°
Fri
8/21
Fog
25%
15°
26°
Sat
8/22
Mostly Clear
64%
16°
28°
Sun
8/23
Mostly Cloudy
69%
14°
24°
Mon
8/24
Clear
21%
13°
24°
Tue
8/25
Drizzle
70%
13°
27°
Wed
8/26
Rain
63%
15°
25°
Thu
8/27
Rain
69%
16°
27°
Fri
8/28
Rain
68%
16°
28°
Sat
8/29
Drizzle
51%
17°
29°
Sun
8/30
Drizzle
60%
18°
28°
Mon
8/31
Drizzle
60%
17°
28°
Tue
9/1
Drizzle
60%
16°
27°
Wed
9/2
Drizzle
60%
16°
27°
Thu
9/3
Drizzle
60%
16°
28°
38
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
38 AQI 6.8 µg/m³
O3
Ground-level ozone
31 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 38 Good 31 38
Sat 33 Good 33 24
Sun 39 Good 39 32
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
SBCAPE378 J/kg
MLCAPE112 J/kg
MUCAPE378 J/kg
SBCIN-0 J/kg
MLCIN-2 J/kg
Lifted Index-1.4
Kinematics
0–6 km Shear37 kt
0–1 km Shear7 kt
Eff. Shear27 kt
0–1 km SRH-22
0–3 km SRH24
Eff. SRH24
Storm Motion286° @ 27 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.1
K-Index32.8
Thermo & Levels
PWAT1.71 in
0–3 km LR5.9 °C/km
700–500 LR5.0 °C/km
Total Totals43.2
LCL948 hPa
LFC975 hPa
EL373 hPa
Freezing Lvl12,329 ft