Flash Flood Warning — Mercer County, NJ, Bucks County, PA, Montgomery County, PA, Philadelphia County, PA 9:30 PM Areal Flood Warning — Montgomery County, PA, Philadelphia County, PA 12:45 AM Areal Flood Watch 1:00 AM

Philadelphia County, Pennsylvania, United States

Last updated: 9:13 PM CDT  ·  Refresh
19°C
Feels like 18°
Mostly Cloudy
▲ 25°  /  ▼ 17°
Wind
12 mph NNE
Humidity
86%
Dew Point
18°
Pressure
29.84 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
85%
Sunrise
6:17 AM
Sunset
7:50 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Philadelphia County is currently mostly cloudy at 19°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:17AM · Sunset: 7:50PM.

Alerts

Flash Flood Warning
Mercer County, NJ, Bucks County, PA, Montgomery County, PA, Philadelphia County, PA
Expires 9:30 PM
Areal Flood Warning
Montgomery County, PA, Philadelphia County, PA
Expires 12:45 AM
Areal Flood Watch
Expires 1:00 AM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
19°
4%
11 PM
19°
23%
12 AM
19°
23%
1 AM
18°
21%
2 AM
18°
14%
3 AM
18°
14%
4 AM
17°
15%
5 AM
17°
15%
6 AM
17°
15%
7 AM
17°
7%
8 AM
18°
3%
9 AM
19°
3%
10 AM
20°
3%
11 AM
22°
3%
12 PM
23°
3%
1 PM
25°
3%
2 PM
26°
3%
3 PM
26°
8%
4 PM
26°
18%
5 PM
26°
18%
6 PM
25°
19%
7 PM
24°
19%
8 PM
24°
19%
9 PM
22°
24%
7-Day Forecast
Tonight
25° 17°
Mostly Cloudy.
Fri
28° 17°
Partly Cloudy with a 29% chance of rain.
Sat
26° 19°
Overcast with a 75% chance of rain.
Sun
29° 19°
Mostly Cloudy with a 60% chance of rain.
Mon
29° 18°
Clear.
Tue
29° 19°
Rain, 61% chance.
Wed
31° 19°
Drizzle, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 19° Mostly Cloudy 4% 13 mph NNE 86%
11 PM 19° Mostly Cloudy 23% 9 mph N 84%
12 AM 19° Overcast 23% 9 mph N 84%
1 AM 18° Overcast 21% 9 mph N 85%
2 AM 18° Overcast 14% 8 mph N 85%
3 AM 18° Mostly Cloudy 14% 8 mph N 84%
4 AM 17° Mostly Cloudy 15% 7 mph NNW 84%
5 AM 17° Overcast 15% 8 mph NNW 85%
6 AM 17° Overcast 15% 7 mph N 82%
7 AM 17° Overcast 7% 7 mph N 80%
8 AM 18° Mostly Cloudy 3% 8 mph N 76%
9 AM 19° Mostly Cloudy 3% 8 mph N 71%
10 AM 20° Partly Cloudy 3% 8 mph N 67%
11 AM 22° Mostly Clear 3% 7 mph N 63%
12 PM 23° Partly Cloudy 3% 6 mph NNE 59%
1 PM 25° Partly Cloudy 3% 6 mph NNE 56%
2 PM 26° Partly Cloudy 3% 5 mph NNE 54%
3 PM 26° Partly Cloudy 8% 4 mph NNE 53%
4 PM 26° Mostly Clear 18% 4 mph NE 52%
5 PM 26° Mostly Clear 18% 4 mph NE 52%
6 PM 25° Mostly Clear 19% 4 mph NE 56%
7 PM 24° Mostly Clear 19% 4 mph ENE 61%
8 PM 24° Partly Cloudy 19% 4 mph ENE 65%
9 PM 22° Partly Cloudy 24% 4 mph E 69%
15-Day Forecast
Today
8/20
Mostly Cloudy
4%
17°
25°
Fri
8/21
Partly Cloudy
29%
17°
28°
Sat
8/22
Overcast
75%
19°
26°
Sun
8/23
Mostly Cloudy
60%
19°
29°
Mon
8/24
Clear
8%
18°
29°
Tue
8/25
Rain
61%
19°
29°
Wed
8/26
Drizzle
71%
19°
31°
Thu
8/27
Rain
82%
20°
29°
Fri
8/28
Drizzle
69%
19°
31°
Sat
8/29
Rain
68%
21°
31°
Sun
8/30
Drizzle
64%
20°
31°
Mon
8/31
Drizzle
60%
21°
30°
Tue
9/1
Drizzle
60%
20°
30°
Wed
9/2
Drizzle
60%
20°
29°
Thu
9/3
Drizzle
60%
20°
29°
52
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
52 AQI 9.4 µg/m³
O3
Ground-level ozone
35 AQI 39 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 35 52
Sat 50 Good 50 41
Sun 53 Moderate 25 53
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 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Thu Aug 20, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE14 J/kg
MUCAPE33 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index5.0
Kinematics
0–6 km Shear45 kt
0–1 km Shear7 kt
Eff. Shear—
0–1 km SRH10
0–3 km SRH220
Eff. SRH—
Storm Motion285° @ 29 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index35.3
Thermo & Levels
PWAT2.01 in
0–3 km LR3.7 °C/km
700–500 LR5.5 °C/km
Total Totals45.0
LCL987 hPa
LFC—
EL—
Freezing Lvl14,954 ft