Extreme Heat Warning — Chicot, AR, West Carroll, LA, East Carroll, LA, Madison, LA, Tensas, LA, Concordia, LA, Bolivar, MS, Sunflower, MS, Leflore, MS, Grenada, MS, Carroll, MS, Montgomery, MS, Webster, MS, Clay, MS, Lowndes, MS, Choctaw, MS, Oktibbeha, MS, Washington, MS, Humphreys, MS, Holmes, MS, Attala, MS, Winston, MS, Noxubee, MS, Issaquena, MS, Sharkey, MS, Yazoo, MS, Madison, MS, Leake, MS, Neshoba, MS, Kemper, MS, Warren, MS, Hinds, MS, Rankin, MS, Scott, MS, Newton, MS, Lauderdale, MS, Claiborne, MS, Copiah, MS, Simpson, MS, Smith, MS, Jasper, MS, Clarke, MS, Jefferson, MS, Adams, MS, Franklin, MS, Lincoln, MS, Lawrence, MS, Jefferson Davis, MS, Covington, MS, Jones, MS, Marion, MS, Lamar, MS, Forrest, MS 8:00 PM

Jefferson County, Mississippi, 39069, United States

Last updated: 1:20 AM CDT  ·  Refresh
27°C
Feels like 29°
Mostly Clear
▲ 38°  /  ▼ 24°
Wind
7 mph SSW
Humidity
76%
Dew Point
23°
Pressure
29.78 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
10%
Sunrise
6:30 AM
Sunset
7:45 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jefferson County is currently mostly clear at 27°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1385 J/kg) — isolated convective development possible. Sunrise: 6:30AM · Sunset: 7:45PM.

Alerts

Extreme Heat Warning
Chicot, AR, West Carroll, LA, East Carroll, LA, Madison, LA, Tensas, LA, Concordia, LA, Bolivar, MS, Sunflower, MS, Leflore, MS, Grenada, MS, Carroll, MS, Montgomery, MS, Webster, MS, Clay, MS, Lowndes, MS, Choctaw, MS, Oktibbeha, MS, Washington, MS, Humphreys, MS, Holmes, MS, Attala, MS, Winston, MS, Noxubee, MS, Issaquena, MS, Sharkey, MS, Yazoo, MS, Madison, MS, Leake, MS, Neshoba, MS, Kemper, MS, Warren, MS, Hinds, MS, Rankin, MS, Scott, MS, Newton, MS, Lauderdale, MS, Claiborne, MS, Copiah, MS, Simpson, MS, Smith, MS, Jasper, MS, Clarke, MS, Jefferson, MS, Adams, MS, Franklin, MS, Lincoln, MS, Lawrence, MS, Jefferson Davis, MS, Covington, MS, Jones, MS, Marion, MS, Lamar, MS, Forrest, MS
Expires 8:00 PM
53 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
3%
2 AM
27°
3%
3 AM
27°
3%
4 AM
26°
3%
5 AM
24°
3%
6 AM
23°
3%
7 AM
24°
3%
8 AM
26°
3%
9 AM
28°
3%
10 AM
30°
11%
11 AM
32°
11%
12 PM
34°
15%
1 PM
37°
15%
2 PM
37°
15%
3 PM
36°
15%
4 PM
36°
14%
5 PM
36°
14%
6 PM
35°
10%
7 PM
34°
3%
8 PM
33°
3%
9 PM
30°
3%
10 PM
29°
5%
11 PM
29°
5%
12 AM
29°
5%
7-Day Forecast
Today
38° 24°
Partly Cloudy.
Tue
41° 24°
Partly Cloudy with a 62% chance of rain.
Wed
40° 23°
Mostly Clear with a 45% chance of rain.
Thu
39° 22°
Mostly Clear with a 38% chance of rain.
Fri
39° 22°
Rain, 29% chance.
Sat
39° 23°
Drizzle, 52% chance.
Sun
39° 21°
Rain, 41% chance.
TimeTempConditionsPrecipWindHumidity
Now 27° Mostly Clear 3% 7 mph SSW 76%
2 AM 27° Mostly Clear 3% 7 mph SSW 80%
3 AM 27° Mostly Clear 3% 6 mph SW 83%
4 AM 26° Mostly Clear 3% 6 mph SW 85%
5 AM 24° Mostly Clear 3% 6 mph SW 87%
6 AM 23° Partly Cloudy 3% 5 mph SW 88%
7 AM 24° Partly Cloudy 3% 5 mph WSW 86%
8 AM 26° Mostly Clear 3% 6 mph WSW 76%
9 AM 28° Mostly Clear 3% 6 mph W 67%
10 AM 30° Mostly Clear 11% 6 mph W 59%
11 AM 32° Mostly Clear 11% 6 mph W 52%
12 PM 34° Clear 15% 6 mph W 45%
1 PM 37° Mostly Clear 15% 5 mph W 41%
2 PM 37° Partly Cloudy 15% 5 mph W 43%
3 PM 36° Partly Cloudy 15% 5 mph W 45%
4 PM 36° Mostly Cloudy 14% 5 mph WSW 46%
5 PM 36° Partly Cloudy 14% 6 mph WSW 45%
6 PM 35° Partly Cloudy 10% 7 mph SW 44%
7 PM 34° Partly Cloudy 3% 7 mph SW 46%
8 PM 33° Partly Cloudy 3% 7 mph SW 50%
9 PM 30° Partly Cloudy 3% 7 mph SW 54%
10 PM 29° Partly Cloudy 5% 7 mph SW 57%
11 PM 29° Mostly Clear 5% 7 mph SW 60%
12 AM 29° Mostly Clear 5% 7 mph SW 62%
15-Day Forecast
Today
8/17
Partly Cloudy
15%
24°
38°
Tue
8/18
Partly Cloudy
62%
24°
41°
Wed
8/19
Mostly Clear
45%
23°
40°
Thu
8/20
Mostly Clear
38%
22°
39°
Fri
8/21
Rain
29%
22°
39°
Sat
8/22
Drizzle
52%
23°
39°
Sun
8/23
Rain
41%
21°
39°
Mon
8/24
Drizzle
43%
22°
39°
Tue
8/25
Drizzle
44%
23°
38°
Wed
8/26
Drizzle
60%
23°
38°
Thu
8/27
Drizzle
60%
23°
39°
Fri
8/28
Drizzle
60%
23°
39°
Sat
8/29
Drizzle
60%
22°
38°
Sun
8/30
Drizzle
60%
22°
37°
Mon
8/31
Drizzle
60%
22°
37°
53
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
53 AQI 10.0 µg/m³
O3
Ground-level ozone
27 AQI 29 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 53 Moderate 27 53
Tue 52 Moderate 34 52
Wed 51 Moderate 31 51
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 Mon Aug 17, 05:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE794 J/kg
MLCAPE687 J/kg
MUCAPE794 J/kg
SBCIN-329 J/kg
MLCIN-243 J/kg
Lifted Index-2.8
Kinematics
0–6 km Shear8 kt
0–1 km Shear8 kt
Eff. Shear23 kt
0–1 km SRH22
0–3 km SRH79
Eff. SRH125
Storm Motion146° @ 14 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell1.2
K-Index26.2
Thermo & Levels
PWAT1.63 in
0–3 km LR5.0 °C/km
700–500 LR6.0 °C/km
Total Totals45.4
LCL945 hPa
LFC688 hPa
EL200 hPa
Freezing Lvl16,325 ft