Areal Flood Warning — Allegheny County, PA, Armstrong County, PA, Fayette County, PA, Indiana County, PA, Westmoreland County, PA 4:00 PM Areal Flood Warning — Armstrong County, PA, Indiana County, PA, Jefferson County, PA, Westmoreland County, PA 4:15 PM

Armstrong County, Pennsylvania, United States

Last updated: 2:02 PM CDT  ·  Refresh
20°C
Feels like 21°
Overcast
▲ 22°  /  ▼ 13°
Wind
6 mph NE
Humidity
91%
Dew Point
19°
Pressure
28.73 inHg
Visibility
4 mi
UV Index
4.3
Cloud Cover
87%
Sunrise
6:33 AM
Sunset
8:08 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Armstrong County is currently overcast at 20°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:33AM · Sunset: 8:08PM.

Alerts

Areal Flood Warning
Allegheny County, PA, Armstrong County, PA, Fayette County, PA, Indiana County, PA, Westmoreland County, PA
Expires 4:00 PM
Areal Flood Warning
Armstrong County, PA, Indiana County, PA, Jefferson County, PA, Westmoreland County, PA
Expires 4:15 PM
41 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
20°
38%
4 PM
21°
24%
5 PM
21°
23%
6 PM
22°
20%
7 PM
21°
18%
8 PM
20°
3%
9 PM
19°
3%
10 PM
17°
6%
11 PM
16°
6%
12 AM
16°
6%
1 AM
15°
15%
2 AM
14°
15%
3 AM
14°
15%
4 AM
14°
15%
5 AM
13°
16%
6 AM
13°
16%
7 AM
13°
16%
8 AM
13°
16%
9 AM
14°
18%
10 AM
16°
9%
11 AM
17°
9%
12 PM
18°
13%
1 PM
20°
13%
2 PM
23°
15%
7-Day Forecast
Today
22° 13°
Mostly Cloudy with a 38% chance of rain.
Fri
25° 13°
Fog.
Sat
27° 16°
Partly Cloudy with a 56% chance of rain.
Sun
24° 13°
Rain, 69% chance.
Mon
24° 12°
Clear with a 21% chance of rain.
Tue
27° 11°
Drizzle, 70% chance.
Wed
26° 14°
Clear with a 53% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 20° Overcast 38% 6 mph NE 91%
4 PM 21° Mostly Cloudy 24% 6 mph NNE 88%
5 PM 21° Mostly Cloudy 23% 6 mph NNE 85%
6 PM 22° Partly Cloudy 20% 6 mph NE 86%
7 PM 21° Partly Cloudy 18% 5 mph NE 87%
8 PM 20° Mostly Clear 3% 4 mph NE 89%
9 PM 19° Mostly Clear 3% 4 mph ENE 92%
10 PM 17° Clear 6% 4 mph ENE 94%
11 PM 16° Clear 6% 4 mph ENE 97%
12 AM 16° Mostly Clear 6% 3 mph ENE 97%
1 AM 15° Mostly Clear 15% 3 mph ENE 97%
2 AM 14° Partly Cloudy 15% 4 mph NE 97%
3 AM 14° Fog 15% 4 mph NE 97%
4 AM 14° Fog 15% 4 mph ENE 97%
5 AM 13° Fog 16% 4 mph ENE 98%
6 AM 13° Fog 16% 4 mph ENE 96%
7 AM 13° Fog 16% 4 mph ENE 95%
8 AM 13° Fog 16% 4 mph ENE 93%
9 AM 14° Fog 18% 4 mph ENE 88%
10 AM 16° Fog 9% 5 mph ENE 82%
11 AM 17° Fog 9% 5 mph ENE 78%
12 PM 18° Mostly Clear 13% 5 mph ENE 74%
1 PM 20° Mostly Clear 13% 5 mph E 70%
2 PM 23° Clear 15% 6 mph E 66%
15-Day Forecast
Today
8/20
Mostly Cloudy
38%
13°
22°
Fri
8/21
Fog
18%
13°
25°
Sat
8/22
Partly Cloudy
56%
16°
27°
Sun
8/23
Rain
69%
13°
24°
Mon
8/24
Clear
21%
12°
24°
Tue
8/25
Drizzle
70%
11°
27°
Wed
8/26
Clear
53%
14°
26°
Thu
8/27
Rain
63%
15°
27°
Fri
8/28
Drizzle
44%
14°
28°
Sat
8/29
Drizzle
51%
16°
29°
Sun
8/30
Drizzle
60%
16°
27°
Mon
8/31
Drizzle
60%
16°
27°
Tue
9/1
Drizzle
60%
14°
26°
Wed
9/2
Drizzle
60%
14°
27°
Thu
9/3
Drizzle
60%
14°
27°
41
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
41 AQI 7.3 µg/m³
O3
Ground-level ozone
27 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Fri 41 Good 27 41
Sat 37 Good 37 33
Sun 52 Moderate 42 52
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 90 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE222 J/kg
MLCAPE137 J/kg
MUCAPE255 J/kg
SBCIN-2 J/kg
MLCIN-12 J/kg
Lifted Index-0.9
Kinematics
0–6 km Shear42 kt
0–1 km Shear6 kt
Eff. Shear27 kt
0–1 km SRH48
0–3 km SRH91
Eff. SRH91
Storm Motion284° @ 24 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.1
STP (eff)0.0
Supercell0.3
K-Index34.4
Thermo & Levels
PWAT1.72 in
0–3 km LR5.4 °C/km
700–500 LR5.3 °C/km
Total Totals46.6
LCL953 hPa
LFC834 hPa
EL411 hPa
Freezing Lvl11,969 ft