Flash Flood Warning — Greene County, PA, Washington County, PA, Brooke County, WV, Marshall County, WV, Ohio County, WV 11:45 AM Flash Flood Warning — Allegheny County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA 12:00 PM Areal Flood Watch 1:00 PM

Washington County, Pennsylvania, United States

Last updated: 9:38 AM CDT  ·  Refresh
20°C
Feels like 22°
Mostly Cloudy
▲ 24°  /  ▼ 16°
Wind
4 mph E
Humidity
95%
Dew Point
19°
Pressure
28.76 inHg
Visibility
4 mi
UV Index
4.4
Cloud Cover
84%
Sunrise
6:37 AM
Sunset
8:10 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Washington County is currently mostly cloudy at 20°C. Precipitation is likely — peak probability 90% around 10 AM. Sunrise: 6:37AM · Sunset: 8:10PM.

Alerts

Flash Flood Warning
Greene County, PA, Washington County, PA, Brooke County, WV, Marshall County, WV, Ohio County, WV
Expires 11:45 AM
Flash Flood Warning
Allegheny County, PA, Fayette County, PA, Greene County, PA, Washington County, PA, Westmoreland County, PA
Expires 12:00 PM
Areal Flood Watch
Expires 1:00 PM
49 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
20°
90%
11 AM
20°
81%
12 PM
21°
78%
1 PM
22°
64%
2 PM
22°
59%
3 PM
22°
59%
4 PM
22°
58%
5 PM
23°
35%
6 PM
22°
20%
7 PM
21°
9%
8 PM
21°
10%
9 PM
19°
14%
10 PM
18°
14%
11 PM
18°
7%
12 AM
17°
3%
1 AM
17°
3%
2 AM
17°
3%
3 AM
17°
3%
4 AM
16°
3%
5 AM
16°
5%
6 AM
16°
5%
7 AM
16°
5%
8 AM
17°
9%
9 AM
19°
16%
7-Day Forecast
Today
24° 16°
Mostly Cloudy with a 90% chance of rain.
Fri
27° 16°
Partly Cloudy with a 35% chance of rain.
Sat
28° 16°
Mostly Cloudy with a 57% chance of rain.
Sun
24° 12°
Drizzle, 57% chance.
Mon
25° 12°
Clear.
Tue
27° 13°
Clear.
Wed
26° 16°
Rain, 28% chance.
TimeTempConditionsPrecipWindHumidity
Now 20° Mostly Cloudy 90% 4 mph E 95%
11 AM 20° Overcast 81% 3 mph NNE 92%
12 PM 21° Overcast 78% 3 mph NNW 88%
1 PM 22° Rain 64% 5 mph NNW 85%
2 PM 22° Rain 59% 5 mph N 84%
3 PM 22° Rain 59% 5 mph NNE 86%
4 PM 22° Mostly Cloudy 58% 6 mph NNE 86%
5 PM 23° Partly Cloudy 35% 6 mph NNE 87%
6 PM 22° Partly Cloudy 20% 5 mph NE 89%
7 PM 21° Mostly Clear 9% 4 mph NE 91%
8 PM 21° Mostly Clear 10% 4 mph NE 92%
9 PM 19° Mostly Clear 14% 4 mph NE 94%
10 PM 18° Partly Cloudy 14% 5 mph NE 95%
11 PM 18° Partly Cloudy 7% 5 mph NE 96%
12 AM 17° Mostly Clear 3% 4 mph NE 96%
1 AM 17° Mostly Clear 3% 4 mph NE 97%
2 AM 17° Mostly Clear 3% 4 mph ENE 96%
3 AM 17° Mostly Clear 3% 5 mph ENE 97%
4 AM 16° Haze 3% 5 mph ENE 97%
5 AM 16° Fog 5% 5 mph ENE 96%
6 AM 16° Fog 5% 5 mph ENE 95%
7 AM 16° Fog 5% 5 mph ENE 94%
8 AM 17° Partly Cloudy 9% 6 mph ENE 91%
9 AM 19° Partly Cloudy 16% 6 mph ENE 86%
15-Day Forecast
Today
8/20
Mostly Cloudy
90%
16°
24°
Fri
8/21
Partly Cloudy
35%
16°
27°
Sat
8/22
Mostly Cloudy
57%
16°
28°
Sun
8/23
Drizzle
57%
12°
24°
Mon
8/24
Clear
8%
12°
25°
Tue
8/25
Clear
17%
13°
27°
Wed
8/26
Rain
28%
16°
26°
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°
29°
Mon
8/31
Drizzle
60%
17°
28°
Tue
9/1
Drizzle
60%
16°
28°
Wed
9/2
Drizzle
60%
16°
28°
Thu
9/3
Drizzle
60%
16°
28°
49
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
49 AQI 8.9 µg/m³
O3
Ground-level ozone
36 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 49 Good 36 49
Sat 34 Good 32 34
Sun 38 Good 38 24
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, 13:00'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
SBCAPE232 J/kg
MLCAPE100 J/kg
MUCAPE232 J/kg
SBCIN0 J/kg
MLCIN-5 J/kg
Lifted Index-0.7
Kinematics
0–6 km Shear43 kt
0–1 km Shear7 kt
Eff. Shear32 kt
0–1 km SRH45
0–3 km SRH183
Eff. SRH183
Storm Motion268° @ 25 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.1
STP (eff)0.1
Supercell0.7
K-Index34.9
Thermo & Levels
PWAT1.81 in
0–3 km LR5.2 °C/km
700–500 LR5.4 °C/km
Total Totals43.9
LCL961 hPa
LFC974 hPa
EL461 hPa
Freezing Lvl12,359 ft