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

Somerset County, New Jersey, United States

Last updated: 7:45 PM CDT  ·  Refresh
23°C
Feels like 27°
Rain
▲ 26°  /  ▼ 18°
Wind
5 mph S
Humidity
95%
Dew Point
22°
Pressure
29.56 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
68%
Sunrise
5:45 AM
Sunset
8:23 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Somerset County is currently rain at 23°C. Precipitation is likely — peak probability 78% around 8 PM. Atmospheric instability is elevated (CAPE up to 1165 J/kg) — isolated convective development possible. Sunrise: 5:45AM · Sunset: 8:23PM.

Alerts

Tornado Watch
Expires 8:00 PM
Flood Watch
Expires 1:00 AM
81 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
78%
9 PM
23°
64%
10 PM
23°
49%
11 PM
23°
46%
12 AM
23°
38%
1 AM
22°
54%
2 AM
22°
39%
3 AM
22°
44%
4 AM
22°
44%
5 AM
21°
33%
6 AM
21°
26%
7 AM
22°
18%
8 AM
23°
31%
9 AM
24°
17%
10 AM
26°
13%
11 AM
26°
6%
12 PM
27°
3%
1 PM
27°
3%
2 PM
27°
3%
3 PM
28°
3%
4 PM
28°
3%
5 PM
28°
3%
6 PM
28°
3%
7 PM
27°
3%
7-Day Forecast
Tonight
26° 18°
Rain, 78% chance.
Wed
28° 18°
Partly Cloudy with a 39% chance of rain.
Thu
28° 17°
Mostly Clear.
Fri
28° 17°
Partly Cloudy.
Sat
27° 17°
Mostly Clear.
Sun
29° 17°
Drizzle, 70% chance.
Mon
29° 18°
Drizzle, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 23° Rain 78% 5 mph S 95%
9 PM 23° Mostly Cloudy 64% 7 mph SSW 95%
10 PM 23° Mostly Cloudy 49% 7 mph SW 95%
11 PM 23° Rain 46% 7 mph SW 95%
12 AM 23° Mostly Cloudy 38% 6 mph SSW 96%
1 AM 22° Overcast 54% 7 mph SSW 96%
2 AM 22° Overcast 39% 8 mph SW 97%
3 AM 22° Overcast 44% 7 mph SW 96%
4 AM 22° Overcast 44% 8 mph SSW 95%
5 AM 21° Mostly Cloudy 33% 7 mph SSW 94%
6 AM 21° Mostly Cloudy 26% 7 mph SW 92%
7 AM 22° Partly Cloudy 18% 8 mph SW 89%
8 AM 23° Mostly Cloudy 31% 8 mph WSW 84%
9 AM 24° Partly Cloudy 17% 9 mph WSW 77%
10 AM 26° Partly Cloudy 13% 9 mph W 70%
11 AM 26° Partly Cloudy 6% 10 mph W 65%
12 PM 27° Mostly Clear 3% 11 mph W 61%
1 PM 27° Mostly Clear 3% 11 mph W 57%
2 PM 27° Mostly Clear 3% 11 mph W 56%
3 PM 28° Clear 3% 10 mph W 54%
4 PM 28° Clear 3% 10 mph W 54%
5 PM 28° Clear 3% 9 mph W 55%
6 PM 28° Mostly Clear 3% 9 mph W 58%
7 PM 27° Mostly Clear 3% 8 mph W 60%
15-Day Forecast
Today
7/21
Rain
78%
18°
26°
Wed
7/22
Partly Cloudy
39%
18°
28°
Thu
7/23
Mostly Clear
3%
17°
28°
Fri
7/24
Partly Cloudy
6%
17°
28°
Sat
7/25
Mostly Clear
17%
17°
27°
Sun
7/26
Drizzle
70%
17°
29°
Mon
7/27
Drizzle
71%
18°
29°
Tue
7/28
Rain
63%
19°
28°
Wed
7/29
Rain
68%
18°
28°
Thu
7/30
Drizzle
44%
18°
28°
Fri
7/31
Drizzle
60%
18°
31°
Sat
8/1
Drizzle
60%
20°
29°
Sun
8/2
Drizzle
60%
20°
29°
Mon
8/3
Drizzle
60%
21°
28°
Tue
8/4
Drizzle
60%
21°
30°
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
Today 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, 23:00'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
SBCAPE575 J/kg
MLCAPE732 J/kg
MUCAPE961 J/kg
SBCIN-65 J/kg
MLCIN0 J/kg
Lifted Index-3.9
Kinematics
0–6 km Shear41 kt
0–1 km Shear14 kt
Eff. Shear41 kt
0–1 km SRH70
0–3 km SRH72
Eff. SRH72
Storm Motion222° @ 36 kt
0–1 km EHI0.3
Composite Parameters
Sig. Tornado0.4
STP (eff)0.3
Supercell1.5
K-Index34.9
Thermo & Levels
PWAT2.05 in
0–3 km LR4.7 °C/km
700–500 LR6.4 °C/km
Total Totals49.7
LCL982 hPa
LFC748 hPa
EL247 hPa
Freezing Lvl14,839 ft