Severe Thunderstorm Watch 8:00 PM

Philadelphia, Pennsylvania

Last updated: 7:18 PM CDT  ·  Refresh
26°C
Feels like 27°
Partly Cloudy
▲ 27°  /  ▼ 19°
Wind
2 mph ENE
Humidity
58%
Dew Point
17°
Pressure
29.96 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
51%
Sunrise
6:18 AM
Sunset
7:48 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Philadelphia is currently partly cloudy at 26°C. Precipitation is likely — peak probability 72% around 7 PM. Sunrise: 6:18AM · Sunset: 7:48PM.

Alerts

Severe Thunderstorm Watch
Expires 8:00 PM
47 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
11%
9 PM
24°
29%
10 PM
23°
29%
11 PM
22°
23%
12 AM
22°
26%
1 AM
22°
26%
2 AM
22°
29%
3 AM
22°
35%
4 AM
21°
39%
5 AM
20°
38%
6 AM
20°
39%
7 AM
20°
43%
8 AM
21°
53%
9 AM
21°
55%
10 AM
21°
63%
11 AM
22°
39%
12 PM
22°
46%
1 PM
23°
58%
2 PM
24°
64%
3 PM
24°
64%
4 PM
24°
51%
5 PM
23°
60%
6 PM
23°
65%
7 PM
22°
71%
7-Day Forecast
Tonight
27° 19°
Overcast with a 23% chance of rain.
Sat
25° 20°
Rain, 64% chance.
Sun
29° 20°
Partly Cloudy with a 37% chance of rain.
Mon
27° 18°
Mostly Clear.
Tue
27° 18°
Clear.
Wed
30° 18°
Drizzle, 62% chance.
Thu
31° 20°
Rain, 73% chance.
TimeTempConditionsPrecipWindHumidity
Now 26° Partly Cloudy 11% 2 mph ENE 58%
9 PM 24° Overcast 29% 4 mph ESE 68%
10 PM 23° Overcast 29% 5 mph SE 76%
11 PM 22° Overcast 23% 5 mph SE 81%
12 AM 22° Overcast 26% 4 mph SE 82%
1 AM 22° Overcast 26% 3 mph ESE 84%
2 AM 22° Overcast 29% 3 mph ESE 86%
3 AM 22° Overcast 35% 3 mph E 87%
4 AM 21° Overcast 39% 3 mph E 87%
5 AM 20° Overcast 38% 3 mph E 88%
6 AM 20° Overcast 39% 3 mph E 90%
7 AM 20° Overcast 43% 3 mph E 91%
8 AM 21° Overcast 53% 4 mph E 91%
9 AM 21° Overcast 55% 5 mph E 89%
10 AM 21° Drizzle 63% 6 mph ESE 87%
11 AM 22° Drizzle 39% 6 mph ESE 83%
12 PM 22° Drizzle 46% 6 mph ESE 78%
1 PM 23° Rain 58% 6 mph ESE 74%
2 PM 24° Rain 64% 6 mph E 72%
3 PM 24° Rain 64% 6 mph ESE 76%
4 PM 24° Drizzle 51% 6 mph ESE 80%
5 PM 23° Overcast 60% 6 mph ESE 82%
6 PM 23° Overcast 65% 6 mph ESE 84%
7 PM 22° Mostly Cloudy 71% 6 mph ESE 86%
15-Day Forecast
Today
8/21
Overcast
23%
19°
27°
Sat
8/22
Rain
64%
20°
25°
Sun
8/23
Partly Cloudy
37%
20°
29°
Mon
8/24
Mostly Clear
14%
18°
27°
Tue
8/25
Clear
3%
18°
27°
Wed
8/26
Drizzle
62%
18°
30°
Thu
8/27
Rain
73%
20°
31°
Fri
8/28
Rain
66%
22°
31°
Sat
8/29
Drizzle
46%
21°
32°
Sun
8/30
Drizzle
64%
20°
32°
Mon
8/31
Rain
64%
20°
30°
Tue
9/1
Drizzle
60%
21°
31°
Wed
9/2
Drizzle
60%
21°
29°
Thu
9/3
Drizzle
60%
20°
29°
Fri
9/4
Clear
60%
20°
29°
47
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
37 AQI 6.7 µg/m³
O3
Ground-level ozone
Dominant
47 AQI 51 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 47 Good 47 37
Sun 41 Good 37 41
Mon 43 Good 43 34
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 Fri Aug 21, 23:00'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
SBCAPE6 J/kg
MLCAPE2 J/kg
MUCAPE6 J/kg
SBCIN-43 J/kg
MLCIN0 J/kg
Lifted Index2.8
Kinematics
0–6 km Shear26 kt
0–1 km Shear2 kt
Eff. Shear—
0–1 km SRH-9
0–3 km SRH43
Eff. SRH—
Storm Motion308° @ 18 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index11.8
Thermo & Levels
PWAT1.10 in
0–3 km LR5.6 °C/km
700–500 LR5.6 °C/km
Total Totals36.6
LCL893 hPa
LFC863 hPa
EL820 hPa
Freezing Lvl14,117 ft