Tornado Watch 8:00 PM

Union County, New Jersey, United States

Last updated: 6:19 PM CDT  ·  Refresh
24°C
Feels like 27°
Overcast
▲ 28°  /  ▼ 21°
Wind
5 mph S
Humidity
91%
Dew Point
22°
Pressure
29.58 inHg
Visibility
8 mi
UV Index
0.9
Cloud Cover
96%
Sunrise
5:44 AM
Sunset
8:22 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Union County is currently overcast at 24°C. Precipitation is likely — peak probability 83% around 7 PM. Atmospheric instability is elevated (CAPE up to 1699 J/kg) — isolated convective development possible. Sunrise: 5:44AM · Sunset: 8:22PM.

Alerts

Tornado Watch
Expires 8:00 PM
74 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
83%
8 PM
23°
83%
9 PM
23°
75%
10 PM
23°
72%
11 PM
23°
68%
12 AM
23°
62%
1 AM
23°
62%
2 AM
23°
47%
3 AM
23°
47%
4 AM
23°
48%
5 AM
21°
48%
6 AM
21°
45%
7 AM
22°
32%
8 AM
22°
26%
9 AM
23°
35%
10 AM
24°
29%
11 AM
25°
24%
12 PM
26°
14%
1 PM
26°
14%
2 PM
27°
14%
3 PM
27°
14%
4 PM
27°
14%
5 PM
27°
15%
6 PM
27°
9%
7-Day Forecast
Tonight
28° 21°
Overcast with a 83% chance of rain.
Wed
29° 21°
Partly Cloudy with a 62% chance of rain.
Thu
28° 18°
Mostly Clear.
Fri
27° 18°
Haze.
Sat
28° 18°
Partly Cloudy.
Sun
29° 19°
Rain, 71% chance.
Mon
29° 20°
Drizzle, 60% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Overcast 83% 5 mph S 91%
8 PM 23° Overcast 83% 7 mph SSW 93%
9 PM 23° Rain 75% 10 mph SSW 94%
10 PM 23° Mostly Cloudy 72% 8 mph SSW 95%
11 PM 23° Mostly Cloudy 68% 9 mph SSW 95%
12 AM 23° Overcast 62% 9 mph SSW 96%
1 AM 23° Overcast 62% 9 mph SW 96%
2 AM 23° Overcast 47% 10 mph SW 96%
3 AM 23° Overcast 47% 10 mph SW 95%
4 AM 23° Mostly Cloudy 48% 10 mph SW 93%
5 AM 21° Mostly Cloudy 48% 10 mph SW 92%
6 AM 21° Mostly Cloudy 45% 9 mph SW 90%
7 AM 22° Mostly Cloudy 32% 8 mph SW 89%
8 AM 22° Partly Cloudy 26% 8 mph SW 87%
9 AM 23° Partly Cloudy 35% 8 mph WSW 82%
10 AM 24° Partly Cloudy 29% 9 mph WSW 78%
11 AM 25° Partly Cloudy 24% 9 mph WSW 72%
12 PM 26° Partly Cloudy 14% 10 mph WSW 66%
1 PM 26° Mostly Clear 14% 10 mph WSW 61%
2 PM 27° Mostly Clear 14% 10 mph WSW 58%
3 PM 27° Mostly Clear 14% 9 mph WSW 56%
4 PM 27° Mostly Clear 14% 10 mph WSW 55%
5 PM 27° Mostly Clear 15% 9 mph WSW 55%
6 PM 27° Mostly Clear 9% 9 mph W 58%
15-Day Forecast
Today
7/21
Overcast
83%
21°
28°
Wed
7/22
Partly Cloudy
62%
21°
29°
Thu
7/23
Mostly Clear
3%
18°
28°
Fri
7/24
Haze
6%
18°
27°
Sat
7/25
Partly Cloudy
8%
18°
28°
Sun
7/26
Rain
71%
19°
29°
Mon
7/27
Drizzle
60%
20°
29°
Tue
7/28
Drizzle
63%
21°
28°
Wed
7/29
Drizzle
68%
20°
27°
Thu
7/30
Drizzle
68%
20°
28°
Fri
7/31
Drizzle
51%
20°
28°
Sat
8/1
Drizzle
60%
21°
27°
Sun
8/2
Drizzle
60%
21°
28°
Mon
8/3
Drizzle
60%
22°
28°
Tue
8/4
Drizzle
60%
22°
29°
74
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
74 AQI 21.4 µg/m³
O3
Ground-level ozone
37 AQI 40 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 74 Moderate 37 74
Thu 40 Good 40 28
Fri 45 Good 45 44
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
SBCAPE703 J/kg
MLCAPE1095 J/kg
MUCAPE1348 J/kg
SBCIN-157 J/kg
MLCIN0 J/kg
Lifted Index-4.0
Kinematics
0–6 km Shear39 kt
0–1 km Shear17 kt
Eff. Shear38 kt
0–1 km SRH39
0–3 km SRH-4
Eff. SRH-4
Storm Motion222° @ 38 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.2
STP (eff)0.0
Supercell0.0
K-Index30.4
Thermo & Levels
PWAT1.94 in
0–3 km LR4.8 °C/km
700–500 LR6.3 °C/km
Total Totals46.5
LCL977 hPa
LFC723 hPa
EL211 hPa
Freezing Lvl14,350 ft