Tornado Watch 8:00 PM Areal Flood Watch 1:00 AM

Somerset County, New Jersey, United States

Last updated: 6:24 PM CDT  ·  Refresh
24°C
Feels like 28°
Overcast
▲ 27°  /  ▼ 18°
Wind
5 mph S
Humidity
93%
Dew Point
22°
Pressure
29.58 inHg
Visibility
9 mi
UV Index
1.3
Cloud Cover
87%
Sunrise
5:45 AM
Sunset
8:23 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Somerset County is currently overcast at 24°C. Precipitation is likely — peak probability 84% around 8 PM. Atmospheric instability is elevated (CAPE up to 1502 J/kg) — isolated convective development possible. Sunrise: 5:45AM · Sunset: 8:23PM.

Alerts

Tornado Watch
Expires 8:00 PM
Areal Flood Watch
Expires 1:00 AM
81 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
83%
8 PM
25°
83%
9 PM
23°
82%
10 PM
23°
82%
11 PM
23°
71%
12 AM
23°
62%
1 AM
22°
47%
2 AM
22°
47%
3 AM
22°
47%
4 AM
22°
52%
5 AM
21°
53%
6 AM
21°
37%
7 AM
22°
37%
8 AM
23°
33%
9 AM
24°
27%
10 AM
25°
25%
11 AM
26°
16%
12 PM
26°
8%
1 PM
27°
8%
2 PM
28°
8%
3 PM
28°
8%
4 PM
28°
8%
5 PM
28°
8%
6 PM
28°
9%
7-Day Forecast
Tonight
27° 18°
Overcast with a 83% chance of rain.
Wed
29° 19°
Partly Cloudy with a 52% chance of rain.
Thu
28° 17°
Mostly Clear.
Fri
27° 18°
Fog.
Sat
28° 16°
Partly Cloudy.
Sun
28° 18°
Rain, 71% chance.
Mon
29° 19°
Drizzle, 60% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Overcast 83% 5 mph S 93%
8 PM 25° Overcast 83% 8 mph S 95%
9 PM 23° Mostly Cloudy 82% 8 mph SSW 96%
10 PM 23° Mostly Cloudy 82% 7 mph SSW 96%
11 PM 23° Rain 71% 7 mph SSW 97%
12 AM 23° Rain 62% 8 mph SSW 98%
1 AM 22° Overcast 47% 7 mph SSW 97%
2 AM 22° Overcast 47% 7 mph SW 97%
3 AM 22° Overcast 47% 8 mph SW 96%
4 AM 22° Overcast 52% 8 mph SW 95%
5 AM 21° Mostly Cloudy 53% 7 mph SW 94%
6 AM 21° Mostly Cloudy 37% 6 mph SW 93%
7 AM 22° Mostly Cloudy 37% 7 mph SW 92%
8 AM 23° Partly Cloudy 33% 8 mph SW 88%
9 AM 24° Partly Cloudy 27% 8 mph WSW 82%
10 AM 25° Partly Cloudy 25% 9 mph W 76%
11 AM 26° Partly Cloudy 16% 10 mph W 70%
12 PM 26° Partly Cloudy 8% 10 mph W 64%
1 PM 27° Mostly Clear 8% 11 mph W 59%
2 PM 28° Mostly Clear 8% 11 mph W 56%
3 PM 28° Mostly Clear 8% 10 mph W 55%
4 PM 28° Clear 8% 10 mph W 55%
5 PM 28° Clear 8% 10 mph W 56%
6 PM 28° Mostly Clear 9% 9 mph W 58%
15-Day Forecast
Today
7/21
Overcast
83%
18°
27°
Wed
7/22
Partly Cloudy
52%
19°
29°
Thu
7/23
Mostly Clear
3%
17°
28°
Fri
7/24
Fog
6%
18°
27°
Sat
7/25
Partly Cloudy
19%
16°
28°
Sun
7/26
Rain
71%
18°
28°
Mon
7/27
Drizzle
60%
19°
29°
Tue
7/28
Drizzle
63%
18°
28°
Wed
7/29
Drizzle
68%
18°
27°
Thu
7/30
Drizzle
68%
18°
28°
Fri
7/31
Drizzle
46%
20°
29°
Sat
8/1
Drizzle
60%
21°
28°
Sun
8/2
Drizzle
60%
20°
29°
Mon
8/3
Drizzle
60%
21°
28°
Tue
8/4
Drizzle
60%
21°
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 25.2 µg/m³
O3
Ground-level ozone
39 AQI 42 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 81 Moderate 39 81
Thu 43 Good 39 43
Fri 48 Good 46 48
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
SBCAPE878 J/kg
MLCAPE1126 J/kg
MUCAPE1387 J/kg
SBCIN-108 J/kg
MLCIN0 J/kg
Lifted Index-4.7
Kinematics
0–6 km Shear40 kt
0–1 km Shear16 kt
Eff. Shear39 kt
0–1 km SRH56
0–3 km SRH31
Eff. SRH31
Storm Motion227° @ 38 kt
0–1 km EHI0.3
Composite Parameters
Sig. Tornado0.4
STP (eff)0.1
Supercell0.9
K-Index31.9
Thermo & Levels
PWAT1.99 in
0–3 km LR5.0 °C/km
700–500 LR6.4 °C/km
Total Totals48.7
LCL975 hPa
LFC735 hPa
EL202 hPa
Freezing Lvl14,390 ft