Excessive Heat Warning — Adams, MS, Grenada, MS, Carroll, MS, Holmes, MS, Issaquena, MS, Sharkey, MS, Yazoo, MS, Madison, MS, Warren, MS, Hinds, MS, Rankin, MS, Claiborne, MS, Copiah, MS, Simpson, MS, Jefferson, MS, Bolivar, MS, Sunflower, MS, Leflore, MS, Washington, MS, Humphreys, MS, Montgomery, MS, Webster, MS, Clay, MS, Lowndes, MS, Choctaw, MS, Oktibbeha, MS, Attala, MS, Winston, MS, Noxubee, MS, Leake, MS, Neshoba, MS, Kemper, MS, Newton, MS, Lauderdale, MS, Scott, MS, Smith, MS, Jasper, MS, Clarke, MS, Franklin, MS, Lincoln, MS, Lawrence, MS, Jefferson Davis, MS, Covington, MS, Jones, MS, Marion, MS, Lamar, MS, Forrest, MS 9:00 PM

Jefferson County, Mississippi, 39069, United States

Last updated: 9:42 PM CDT  ·  Refresh
29°C
Feels like 32°
Clear
▲ 35°  /  ▼ 23°
Wind
2 mph NNW
Humidity
66%
Dew Point
24°
Pressure
29.59 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
3%
Sunrise
6:12 AM
Sunset
8:08 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jefferson County is currently clear at 29°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2803 J/kg) — isolated convective development possible. Sunrise: 6:12AM · Sunset: 8:08PM.

Alerts

Excessive Heat Warning
Adams, MS, Grenada, MS, Carroll, MS, Holmes, MS, Issaquena, MS, Sharkey, MS, Yazoo, MS, Madison, MS, Warren, MS, Hinds, MS, Rankin, MS, Claiborne, MS, Copiah, MS, Simpson, MS, Jefferson, MS, Bolivar, MS, Sunflower, MS, Leflore, MS, Washington, MS, Humphreys, MS, Montgomery, MS, Webster, MS, Clay, MS, Lowndes, MS, Choctaw, MS, Oktibbeha, MS, Attala, MS, Winston, MS, Noxubee, MS, Leake, MS, Neshoba, MS, Kemper, MS, Newton, MS, Lauderdale, MS, Scott, MS, Smith, MS, Jasper, MS, Clarke, MS, Franklin, MS, Lincoln, MS, Lawrence, MS, Jefferson Davis, MS, Covington, MS, Jones, MS, Marion, MS, Lamar, MS, Forrest, MS
Expires 9:00 PM
65 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
4%
10 PM
28°
16%
11 PM
27°
16%
12 AM
27°
16%
1 AM
27°
7%
2 AM
26°
16%
3 AM
26°
17%
4 AM
26°
17%
5 AM
24°
22%
6 AM
24°
22%
7 AM
26°
30%
8 AM
27°
26%
9 AM
30°
27%
10 AM
31°
25%
11 AM
32°
30%
12 PM
33°
40%
1 PM
36°
40%
2 PM
36°
41%
3 PM
35°
41%
4 PM
34°
36%
5 PM
34°
27%
6 PM
33°
21%
7 PM
33°
17%
8 PM
32°
18%
7-Day Forecast
Tonight
35° 23°
Clear.
Tue
37° 24°
Partly Cloudy with a 41% chance of rain.
Wed
38° 24°
Partly Cloudy with a 29% chance of rain.
Thu
35° 24°
Mostly Cloudy with a 57% chance of rain.
Fri
36° 24°
Clear with a 29% chance of rain.
Sat
36° 22°
Drizzle, 51% chance.
Sun
37° 21°
Rain, 29% chance.
TimeTempConditionsPrecipWindHumidity
Now 29° Clear 4% 2 mph NNW 66%
10 PM 28° Mostly Clear 16% 1 mph N 68%
11 PM 27° Partly Cloudy 16% 1 mph NE 70%
12 AM 27° Partly Cloudy 16% 2 mph ESE 71%
1 AM 27° Partly Cloudy 7% 2 mph SE 72%
2 AM 26° Partly Cloudy 16% 2 mph ESE 74%
3 AM 26° Partly Cloudy 17% 2 mph SE 76%
4 AM 26° Partly Cloudy 17% 1 mph ESE 77%
5 AM 24° Partly Cloudy 22% 1 mph E 79%
6 AM 24° Partly Cloudy 22% 1 mph NNW 80%
7 AM 26° Mostly Clear 30% 1 mph N 79%
8 AM 27° Mostly Clear 26% 2 mph NNW 75%
9 AM 30° Mostly Clear 27% 3 mph NNW 70%
10 AM 31° Mostly Clear 25% 4 mph NNW 66%
11 AM 32° Partly Cloudy 30% 4 mph NNW 60%
12 PM 33° Rain 40% 6 mph N 54%
1 PM 36° Rain 40% 6 mph N 54%
2 PM 36° Rain 41% 6 mph NNW 56%
3 PM 35° Rain 41% 7 mph NNW 58%
4 PM 34° Mostly Cloudy 36% 7 mph NNW 60%
5 PM 34° Partly Cloudy 27% 6 mph N 61%
6 PM 33° Partly Cloudy 21% 6 mph N 62%
7 PM 33° Partly Cloudy 17% 5 mph N 63%
8 PM 32° Partly Cloudy 18% 5 mph N 65%
15-Day Forecast
Today
7/20
Clear
4%
23°
35°
Tue
7/21
Partly Cloudy
41%
24°
37°
Wed
7/22
Partly Cloudy
29%
24°
38°
Thu
7/23
Mostly Cloudy
57%
24°
35°
Fri
7/24
Clear
29%
24°
36°
Sat
7/25
Drizzle
51%
22°
36°
Sun
7/26
Rain
29%
21°
37°
Mon
7/27
Clear
17%
23°
38°
Tue
7/28
Drizzle
44%
24°
37°
Wed
7/29
Drizzle
44%
23°
38°
Thu
7/30
Drizzle
60%
23°
38°
Fri
7/31
Drizzle
60%
23°
37°
Sat
8/1
Drizzle
60%
22°
36°
Sun
8/2
Drizzle
60%
23°
37°
Mon
8/3
Drizzle
60%
23°
36°
65
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
65 AQI 16.6 µg/m³
O3
Ground-level ozone
29 AQI 31 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 65 Moderate 29 65
Wed 63 Moderate 26 63
Thu 61 Moderate 35 61
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, 01:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1465 J/kg
MLCAPE1062 J/kg
MUCAPE2027 J/kg
SBCIN-176 J/kg
MLCIN0 J/kg
Lifted Index-3.6
Kinematics
0–6 km Shear21 kt
0–1 km Shear8 kt
Eff. Shear24 kt
0–1 km SRH3
0–3 km SRH-27
Eff. SRH-27
Storm Motion351° @ 22 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index28.7
Thermo & Levels
PWAT1.77 in
0–3 km LR6.0 °C/km
700–500 LR5.2 °C/km
Total Totals42.8
LCL924 hPa
LFC798 hPa
EL162 hPa
Freezing Lvl16,578 ft