Severe Thunderstorm Watch 8:00 PM

Philadelphia, Pennsylvania

Last updated: 6:27 PM CDT  ·  Refresh
26°C
Feels like 28°
Partly Cloudy
▲ 27°  /  ▼ 19°
Wind
4 mph NE
Humidity
58%
Dew Point
16°
Pressure
29.96 inHg
Visibility
10 mi
UV Index
1.0
Cloud Cover
54%
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 75% around 2 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%
8 PM
25°
27%
9 PM
23°
29%
10 PM
23°
29%
11 PM
22°
35%
12 AM
22°
26%
1 AM
22°
26%
2 AM
21°
29%
3 AM
21°
35%
4 AM
21°
38%
5 AM
20°
39%
6 AM
20°
39%
7 AM
20°
50%
8 AM
21°
53%
9 AM
21°
55%
10 AM
21°
63%
11 AM
21°
56%
12 PM
22°
56%
1 PM
23°
68%
2 PM
24°
75%
3 PM
24°
75%
4 PM
24°
61%
5 PM
23°
69%
6 PM
22°
72%
7-Day Forecast
Tonight
27° 19°
Partly Cloudy with a 29% chance of rain.
Sat
25° 20°
Rain, 68% chance.
Sun
29° 20°
Partly Cloudy with a 37% chance of rain.
Mon
27° 18°
Mostly Clear.
Tue
27° 18°
Clear.
Wed
30° 18°
Rain, 62% chance.
Thu
31° 20°
Rain, 70% chance.
TimeTempConditionsPrecipWindHumidity
Now 26° Partly Cloudy 11% 4 mph NE 58%
8 PM 25° Mostly Cloudy 27% 4 mph ESE 65%
9 PM 23° Overcast 29% 4 mph SE 73%
10 PM 23° Mostly Cloudy 29% 4 mph SE 79%
11 PM 22° Overcast 35% 4 mph SE 82%
12 AM 22° Overcast 26% 4 mph ESE 84%
1 AM 22° Overcast 26% 3 mph E 85%
2 AM 21° Overcast 29% 3 mph E 86%
3 AM 21° Overcast 35% 3 mph E 87%
4 AM 21° Overcast 38% 3 mph E 87%
5 AM 20° Overcast 39% 3 mph E 89%
6 AM 20° Overcast 39% 3 mph E 90%
7 AM 20° Overcast 50% 4 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 21° Drizzle 56% 6 mph ESE 84%
12 PM 22° Drizzle 56% 6 mph ESE 80%
1 PM 23° Rain 68% 6 mph E 76%
2 PM 24° Rain 75% 6 mph E 75%
3 PM 24° Rain 75% 6 mph E 77%
4 PM 24° Overcast 61% 6 mph ESE 80%
5 PM 23° Overcast 69% 6 mph ESE 82%
6 PM 22° Mostly Cloudy 72% 6 mph ESE 83%
15-Day Forecast
Today
8/21
Partly Cloudy
29%
19°
27°
Sat
8/22
Rain
68%
20°
25°
Sun
8/23
Partly Cloudy
37%
20°
29°
Mon
8/24
Mostly Clear
13%
18°
27°
Tue
8/25
Clear
3%
18°
27°
Wed
8/26
Rain
62%
18°
30°
Thu
8/27
Rain
70%
20°
31°
Fri
8/28
Rain
66%
22°
32°
Sat
8/29
Drizzle
46%
21°
32°
Sun
8/30
Drizzle
47%
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
Drizzle
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
Sat 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, 22:00'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
SBCAPE13 J/kg
MLCAPE5 J/kg
MUCAPE13 J/kg
SBCIN-35 J/kg
MLCIN-5 J/kg
Lifted Index3.9
Kinematics
0–6 km Shear29 kt
0–1 km Shear2 kt
Eff. Shear—
0–1 km SRH2
0–3 km SRH59
Eff. SRH—
Storm Motion303° @ 19 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index6.3
Thermo & Levels
PWAT1.03 in
0–3 km LR6.1 °C/km
700–500 LR5.0 °C/km
Total Totals34.2
LCL881 hPa
LFC866 hPa
EL574 hPa
Freezing Lvl14,160 ft