Severe Thunderstorm Watch 8:00 PM Severe Thunderstorm Watch 8:00 PM Areal Flood Watch 7:00 AM

Johnston County, North Carolina, United States

Last updated: 4:16 PM CDT  ·  Refresh
26°C
Feels like 27°
Overcast
▲ 27°  /  ▼ 20°
Wind
10 mph NE
Humidity
85%
Dew Point
23°
Pressure
29.79 inHg
Visibility
9 mi
UV Index
1.8
Cloud Cover
98%
Sunrise
6:37 AM
Sunset
7:55 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Johnston County is currently overcast at 25°C. Precipitation is likely — peak probability 90% around 7 PM. Atmospheric instability is elevated (CAPE up to 1555 J/kg) — isolated convective development possible. Sunrise: 6:37AM · Sunset: 7:55PM.

Alerts

Severe Thunderstorm Watch
Expires 8:00 PM
Severe Thunderstorm Watch
Expires 8:00 PM
Areal Flood Watch
Expires 7:00 AM
42 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
72%
6 PM
25°
89%
7 PM
24°
90%
8 PM
23°
56%
9 PM
23°
62%
10 PM
22°
63%
11 PM
22°
75%
12 AM
22°
76%
1 AM
22°
76%
2 AM
22°
69%
3 AM
21°
67%
4 AM
21°
49%
5 AM
20°
41%
6 AM
20°
31%
7 AM
20°
41%
8 AM
21°
46%
9 AM
22°
58%
10 AM
22°
57%
11 AM
23°
67%
12 PM
24°
67%
1 PM
27°
67%
2 PM
27°
67%
3 PM
27°
67%
4 PM
28°
63%
7-Day Forecast
Today
27° 20°
Overcast with a 75% chance of rain.
Sat
30° 20°
Rain, 69% chance.
Sun
32° 21°
Clear.
Mon
32° 19°
Partly Cloudy with a 60% chance of rain.
Tue
30° 19°
Clear.
Wed
31° 19°
Rain, 70% chance.
Thu
32° 21°
Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 26° Overcast 72% 10 mph NE 85%
6 PM 25° Overcast 89% 9 mph WSW 87%
7 PM 24° Overcast 90% 6 mph NE 92%
8 PM 23° Overcast 56% 4 mph ENE 94%
9 PM 23° Overcast 62% 4 mph E 95%
10 PM 22° Overcast 63% 4 mph SE 96%
11 PM 22° Heavy Rain 75% 5 mph SE 97%
12 AM 22° Rain 76% 4 mph SSE 97%
1 AM 22° Rain 76% 3 mph S 96%
2 AM 22° Rain 69% 4 mph SSE 96%
3 AM 21° Overcast 67% 3 mph ESE 96%
4 AM 21° Overcast 49% 2 mph ENE 96%
5 AM 20° Haze 41% 2 mph ENE 96%
6 AM 20° Haze 31% 3 mph NNE 95%
7 AM 20° Rain 41% 3 mph SE 95%
8 AM 21° Rain 46% 2 mph SE 94%
9 AM 22° Rain 58% 2 mph SSE 92%
10 AM 22° Rain 57% 3 mph S 89%
11 AM 23° Rain 67% 4 mph S 86%
12 PM 24° Rain 67% 4 mph SSW 82%
1 PM 27° Rain 67% 4 mph SSW 77%
2 PM 27° Rain 67% 5 mph SSW 73%
3 PM 27° Mostly Cloudy 67% 5 mph SSW 73%
4 PM 28° Mostly Cloudy 63% 5 mph SSW 73%
15-Day Forecast
Today
8/21
Overcast
75%
20°
27°
Sat
8/22
Rain
69%
20°
30°
Sun
8/23
Clear
17%
21°
32°
Mon
8/24
Partly Cloudy
60%
19°
32°
Tue
8/25
Clear
16%
19°
30°
Wed
8/26
Rain
70%
19°
31°
Thu
8/27
Rain
82%
21°
32°
Fri
8/28
Rain
72%
20°
33°
Sat
8/29
Drizzle
44%
21°
30°
Sun
8/30
Drizzle
51%
20°
33°
Mon
8/31
Drizzle
60%
23°
33°
Tue
9/1
Drizzle
60%
23°
34°
Wed
9/2
Drizzle
60%
22°
33°
Thu
9/3
Drizzle
60%
21°
32°
Fri
9/4
Drizzle
60%
21°
32°
42
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
42 AQI 7.5 µg/m³
O3
Ground-level ozone
39 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 42 Good 39 42
Sun 36 Good 33 36
Mon 41 Good 33 41
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 Fri Aug 21, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1075 J/kg
MLCAPE884 J/kg
MUCAPE1724 J/kg
SBCIN-121 J/kg
MLCIN-144 J/kg
Lifted Index-4.5
Kinematics
0–6 km Shear25 kt
0–1 km Shear12 kt
Eff. Shear26 kt
0–1 km SRH24
0–3 km SRH99
Eff. SRH99
Storm Motion284° @ 15 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.1
STP (eff)0.1
Supercell2.3
K-Index36.8
Thermo & Levels
PWAT2.23 in
0–3 km LR5.0 °C/km
700–500 LR6.2 °C/km
Total Totals49.1
LCL972 hPa
LFC735 hPa
EL207 hPa
Freezing Lvl14,728 ft