Extreme Heat Watch 8:00 PM

Philadelphia, Pennsylvania

Last updated: 10:04 PM CDT  ·  Refresh
24°C
Feels like 26°
Clear
▲ 30°  /  ▼ 21°
Wind
4 mph SSE
Humidity
71%
Dew Point
18°
Pressure
30.05 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
2%
Sunrise
6:12 AM
Sunset
7:57 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Philadelphia is currently clear at 24°C. Precipitation is likely — peak probability 81% around 10 PM. Sunrise: 6:12AM · Sunset: 7:57PM.

Alerts

Extreme Heat Watch
Expires 8:00 PM
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
4%
12 AM
24°
23%
1 AM
23°
23%
2 AM
22°
4%
3 AM
22°
7%
4 AM
22°
7%
5 AM
21°
15%
6 AM
21°
16%
7 AM
21°
16%
8 AM
22°
21%
9 AM
24°
29%
10 AM
24°
37%
11 AM
24°
47%
12 PM
24°
53%
1 PM
25°
75%
2 PM
24°
78%
3 PM
24°
78%
4 PM
23°
69%
5 PM
24°
69%
6 PM
23°
69%
7 PM
22°
70%
8 PM
22°
67%
9 PM
21°
70%
10 PM
21°
81%
7-Day Forecast
Tonight
30° 21°
Clear.
Sun
28° 21°
Rain, 78% chance.
Mon
34° 21°
Mostly Clear with a 50% chance of rain.
Tue
32° 22°
Mostly Clear with a 32% chance of rain.
Wed
34° 21°
Clear with a 43% chance of rain.
Thu
32° 21°
Rain, 70% chance.
Fri
31° 20°
Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Clear 4% 4 mph SSE 71%
12 AM 24° Clear 23% 3 mph S 70%
1 AM 23° Mostly Clear 23% 3 mph S 73%
2 AM 22° Mostly Clear 4% 2 mph S 74%
3 AM 22° Mostly Clear 7% 3 mph ESE 76%
4 AM 22° Partly Cloudy 7% 3 mph ESE 79%
5 AM 21° Partly Cloudy 15% 3 mph ESE 80%
6 AM 21° Partly Cloudy 16% 3 mph SE 80%
7 AM 21° Mostly Cloudy 16% 3 mph SE 80%
8 AM 22° Overcast 21% 5 mph SSE 77%
9 AM 24° Overcast 29% 6 mph SSE 72%
10 AM 24° Overcast 37% 8 mph S 68%
11 AM 24° Overcast 47% 8 mph SSE 73%
12 PM 24° Overcast 53% 9 mph SSE 71%
1 PM 25° Overcast 75% 9 mph SSE 70%
2 PM 24° Rain 78% 9 mph SSE 72%
3 PM 24° Rain 78% 9 mph SSE 76%
4 PM 23° Rain 69% 9 mph SSE 81%
5 PM 24° Rain 69% 10 mph SSE 85%
6 PM 23° Rain 69% 10 mph SSE 85%
7 PM 22° Rain 70% 11 mph SSE 85%
8 PM 22° Rain 67% 11 mph SSE 85%
9 PM 21° Overcast 70% 10 mph SSE 86%
10 PM 21° Overcast 81% 10 mph SSE 86%
15-Day Forecast
Today
8/15
Clear
4%
21°
30°
Sun
8/16
Rain
78%
21°
28°
Mon
8/17
Mostly Clear
50%
21°
34°
Tue
8/18
Mostly Clear
32%
22°
32°
Wed
8/19
Clear
43%
21°
34°
Thu
8/20
Rain
70%
21°
32°
Fri
8/21
Rain
82%
20°
31°
Sat
8/22
Rain
63%
19°
29°
Sun
8/23
Drizzle
69%
21°
32°
Mon
8/24
Drizzle
44%
21°
34°
Tue
8/25
Clear
60%
22°
36°
Wed
8/26
Drizzle
60%
23°
34°
Thu
8/27
Drizzle
60%
21°
32°
Fri
8/28
Drizzle
60%
20°
31°
Sat
8/29
Clear
60%
20°
31°
55
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
55 AQI 11.2 µg/m³
O3
Ground-level ozone
37 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 55 Moderate 37 55
Mon 52 Moderate 36 52
Tue 56 Moderate 42 56
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 Sun Aug 16, 01:00'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
SBCAPE48 J/kg
MLCAPE17 J/kg
MUCAPE48 J/kg
SBCIN-102 J/kg
MLCIN-78 J/kg
Lifted Index3.3
Kinematics
0–6 km Shear38 kt
0–1 km Shear5 kt
Eff. Shear—
0–1 km SRH25
0–3 km SRH99
Eff. SRH—
Storm Motion357° @ 22 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-14.0
Thermo & Levels
PWAT1.19 in
0–3 km LR5.5 °C/km
700–500 LR5.0 °C/km
Total Totals33.5
LCL934 hPa
LFC833 hPa
EL731 hPa
Freezing Lvl16,175 ft