Tornado Watch 8:00 PM Tornado Watch 8:00 PM Severe Thunderstorm Watch 9:00 PM Areal Flood Watch 1:00 AM

Philadelphia County, Pennsylvania, United States

Last updated: 7:58 PM CDT  ·  Refresh
23°C
Feels like 25°
Rain
▲ 29°  /  ▼ 22°
Wind
8 mph S
Humidity
93%
Dew Point
22°
Pressure
29.57 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
79%
Sunrise
5:49 AM
Sunset
8:24 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Philadelphia County is currently rain at 23°C. Precipitation is likely — peak probability 71% around 8 PM. Atmospheric instability is elevated (CAPE up to 1131 J/kg) — isolated convective development possible. Sunrise: 5:49AM · Sunset: 8:24PM.

Alerts

Tornado Watch
Expires 8:00 PM
Tornado Watch
Expires 8:00 PM
Severe Thunderstorm Watch
Expires 9:00 PM
Areal Flood Watch
Expires 1:00 AM
79 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
70%
9 PM
23°
61%
10 PM
23°
58%
11 PM
23°
63%
12 AM
23°
50%
1 AM
23°
42%
2 AM
23°
44%
3 AM
22°
40%
4 AM
22°
46%
5 AM
22°
35%
6 AM
22°
39%
7 AM
23°
21%
8 AM
24°
31%
9 AM
26°
27%
10 AM
27°
19%
11 AM
27°
19%
12 PM
27°
20%
1 PM
27°
18%
2 PM
28°
24%
3 PM
28°
28%
4 PM
29°
28%
5 PM
28°
28%
6 PM
27°
28%
7 PM
27°
28%
7-Day Forecast
Tonight
29° 22°
Rain, 70% chance.
Wed
29° 21°
Thunderstorm, 44% chance.
Thu
29° 19°
Mostly Clear.
Fri
28° 18°
Mostly Cloudy.
Sat
29° 18°
Partly Cloudy.
Sun
30° 18°
Drizzle, 70% chance.
Mon
31° 20°
Drizzle, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 23° Rain 70% 8 mph S 93%
9 PM 23° Rain 61% 7 mph SSW 92%
10 PM 23° Mostly Cloudy 58% 8 mph SW 93%
11 PM 23° Mostly Cloudy 63% 8 mph SSW 94%
12 AM 23° Overcast 50% 8 mph SSW 92%
1 AM 23° Overcast 42% 9 mph SSW 92%
2 AM 23° Overcast 44% 8 mph SSW 91%
3 AM 22° Mostly Cloudy 40% 8 mph SSW 91%
4 AM 22° Rain 46% 8 mph SSW 91%
5 AM 22° Thunderstorm 35% 8 mph SW 89%
6 AM 22° Partly Cloudy 39% 8 mph SW 86%
7 AM 23° Partly Cloudy 21% 9 mph SW 83%
8 AM 24° Partly Cloudy 31% 9 mph WSW 77%
9 AM 26° Partly Cloudy 27% 10 mph WSW 71%
10 AM 27° Partly Cloudy 19% 10 mph W 65%
11 AM 27° Partly Cloudy 19% 10 mph W 62%
12 PM 27° Partly Cloudy 20% 10 mph W 60%
1 PM 27° Partly Cloudy 18% 10 mph W 59%
2 PM 28° Partly Cloudy 24% 10 mph W 56%
3 PM 28° Partly Cloudy 28% 9 mph W 54%
4 PM 29° Mostly Clear 28% 8 mph W 52%
5 PM 28° Mostly Clear 28% 8 mph W 54%
6 PM 27° Mostly Clear 28% 7 mph W 56%
7 PM 27° Mostly Clear 28% 7 mph W 58%
15-Day Forecast
Today
7/21
Rain
70%
22°
29°
Wed
7/22
Thunderstorm
44%
21°
29°
Thu
7/23
Mostly Clear
3%
19°
29°
Fri
7/24
Mostly Cloudy
15%
18°
28°
Sat
7/25
Partly Cloudy
8%
18°
29°
Sun
7/26
Drizzle
70%
18°
30°
Mon
7/27
Drizzle
71%
20°
31°
Tue
7/28
Drizzle
63%
20°
30°
Wed
7/29
Drizzle
44%
21°
29°
Thu
7/30
Drizzle
44%
19°
29°
Fri
7/31
Drizzle
60%
19°
31°
Sat
8/1
Drizzle
60%
22°
29°
Sun
8/2
Drizzle
60%
21°
31°
Mon
8/3
Drizzle
60%
22°
30°
Tue
8/4
Drizzle
60%
22°
31°
79
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
79 AQI 24.3 µg/m³
O3
Ground-level ozone
39 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 79 Moderate 39 79
Thu 56 Moderate 44 56
Fri 54 Moderate 48 54
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 Tue Jul 21, 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
SBCAPE364 J/kg
MLCAPE783 J/kg
MUCAPE1243 J/kg
SBCIN-243 J/kg
MLCIN0 J/kg
Lifted Index-2.6
Kinematics
0–6 km Shear36 kt
0–1 km Shear28 kt
Eff. Shear37 kt
0–1 km SRH184
0–3 km SRH185
Eff. SRH185
Storm Motion224° @ 35 kt
0–1 km EHI0.4
Composite Parameters
Sig. Tornado0.5
STP (eff)0.0
Supercell4.4
K-Index33.8
Thermo & Levels
PWAT2.08 in
0–3 km LR4.3 °C/km
700–500 LR6.4 °C/km
Total Totals49.7
LCL984 hPa
LFC685 hPa
EL280 hPa
Freezing Lvl14,186 ft