Tornado Watch 8:00 PM

Berks County, Pennsylvania, United States

Last updated: 6:25 PM CDT  ·  Refresh
24°C
Feels like 28°
Overcast
▲ 28°  /  ▼ 20°
Wind
6 mph SSW
Humidity
91%
Dew Point
21°
Pressure
29.26 inHg
Visibility
9 mi
UV Index
1.0
Cloud Cover
95%
Sunrise
5:51 AM
Sunset
8:28 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Berks County is currently overcast at 24°C. Precipitation is likely — peak probability 51% around 1 AM. Atmospheric instability is elevated (CAPE up to 1056 J/kg) — isolated convective development possible. Sunrise: 5:51AM · Sunset: 8:28PM.

Alerts

Tornado Watch
Expires 8:00 PM
81 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
46%
8 PM
25°
50%
9 PM
23°
45%
10 PM
23°
47%
11 PM
23°
48%
12 AM
22°
46%
1 AM
22°
51%
2 AM
22°
41%
3 AM
22°
41%
4 AM
21°
29%
5 AM
20°
30%
6 AM
21°
30%
7 AM
21°
13%
8 AM
22°
5%
9 AM
23°
7%
10 AM
24°
7%
11 AM
24°
10%
12 PM
25°
10%
1 PM
26°
8%
2 PM
27°
8%
3 PM
27°
8%
4 PM
27°
8%
5 PM
27°
5%
6 PM
26°
5%
7-Day Forecast
Tonight
28° 20°
Overcast with a 47% chance of rain.
Wed
27° 17°
Mostly Clear with a 51% chance of rain.
Thu
27° 15°
Clear.
Fri
27° 16°
Mostly Clear.
Sat
27° 16°
Partly Cloudy.
Sun
28° 17°
Rain, 71% chance.
Mon
29° 18°
Drizzle, 60% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Overcast 46% 6 mph SSW 91%
8 PM 25° Overcast 50% 6 mph SSW 94%
9 PM 23° Mostly Cloudy 45% 5 mph SSW 93%
10 PM 23° Mostly Cloudy 47% 6 mph SSW 93%
11 PM 23° Mostly Cloudy 48% 6 mph SSW 93%
12 AM 22° Mostly Cloudy 46% 7 mph SSW 95%
1 AM 22° Mostly Cloudy 51% 7 mph SW 95%
2 AM 22° Mostly Cloudy 41% 6 mph SW 94%
3 AM 22° Mostly Cloudy 41% 6 mph SW 94%
4 AM 21° Mostly Cloudy 29% 6 mph SSW 94%
5 AM 20° Mostly Cloudy 30% 6 mph SSW 94%
6 AM 21° Partly Cloudy 30% 6 mph SW 92%
7 AM 21° Partly Cloudy 13% 7 mph WSW 90%
8 AM 22° Partly Cloudy 5% 8 mph W 85%
9 AM 23° Partly Cloudy 7% 9 mph W 77%
10 AM 24° Mostly Clear 7% 10 mph W 70%
11 AM 24° Mostly Clear 10% 10 mph W 65%
12 PM 25° Mostly Clear 10% 11 mph W 61%
1 PM 26° Mostly Clear 8% 11 mph W 57%
2 PM 27° Mostly Clear 8% 11 mph W 54%
3 PM 27° Mostly Clear 8% 11 mph W 53%
4 PM 27° Mostly Clear 8% 11 mph W 53%
5 PM 27° Mostly Clear 5% 11 mph W 53%
6 PM 26° Clear 5% 10 mph WNW 56%
15-Day Forecast
Today
7/21
Overcast
47%
20°
28°
Wed
7/22
Mostly Clear
51%
17°
27°
Thu
7/23
Clear
3%
15°
27°
Fri
7/24
Mostly Clear
3%
16°
27°
Sat
7/25
Partly Cloudy
8%
16°
27°
Sun
7/26
Rain
71%
17°
28°
Mon
7/27
Drizzle
60%
18°
29°
Tue
7/28
Drizzle
63%
17°
27°
Wed
7/29
Drizzle
68%
16°
26°
Thu
7/30
Drizzle
68%
17°
28°
Fri
7/31
Drizzle
46%
18°
28°
Sat
8/1
Drizzle
60%
17°
27°
Sun
8/2
Drizzle
60%
17°
29°
Mon
8/3
Drizzle
60%
18°
28°
Tue
8/4
Rain
90%
18°
29°
81
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
81 AQI 25.3 µg/m³
O3
Ground-level ozone
44 AQI 48 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 81 Moderate 44 81
Thu 57 Moderate 38 57
Fri 63 Moderate 44 63
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, 22:00'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
SBCAPE651 J/kg
MLCAPE877 J/kg
MUCAPE1158 J/kg
SBCIN-184 J/kg
MLCIN0 J/kg
Lifted Index-3.9
Kinematics
0–6 km Shear40 kt
0–1 km Shear28 kt
Eff. Shear41 kt
0–1 km SRH139
0–3 km SRH219
Eff. SRH219
Storm Motion228° @ 36 kt
0–1 km EHI0.6
Composite Parameters
Sig. Tornado0.7
STP (eff)0.1
Supercell5.4
K-Index31.9
Thermo & Levels
PWAT1.88 in
0–3 km LR4.9 °C/km
700–500 LR6.7 °C/km
Total Totals48.7
LCL947 hPa
LFC687 hPa
EL219 hPa
Freezing Lvl14,035 ft