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: 2:44 AM CDT  ·  Refresh
27°C
Feels like 30°
Mostly Clear
▲ 38°  /  ▼ 24°
Wind
6 mph SW
Humidity
80%
Dew Point
23°
Pressure
29.77 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
11%
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 1370 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°
4%
3 AM
26°
4%
4 AM
26°
3%
5 AM
23°
3%
6 AM
23°
3%
7 AM
25°
3%
8 AM
27°
3%
9 AM
29°
3%
10 AM
31°
12%
11 AM
33°
16%
12 PM
35°
16%
1 PM
37°
15%
2 PM
36°
15%
3 PM
36°
15%
4 PM
35°
15%
5 PM
36°
10%
6 PM
35°
5%
7 PM
34°
5%
8 PM
33°
5%
9 PM
30°
5%
10 PM
29°
9%
11 PM
29°
9%
12 AM
29°
9%
1 AM
30°
9%
7-Day Forecast
Today
38° 24°
Mostly Clear.
Tue
41° 24°
Partly Cloudy with a 57% chance of rain.
Wed
41° 23°
Clear with a 57% chance of rain.
Thu
38° 22°
Mostly Clear with a 45% chance of rain.
Fri
39° 22°
Rain, 29% chance.
Sat
40° 23°
Drizzle, 43% chance.
Sun
41° 21°
Rain, 41% chance.
TimeTempConditionsPrecipWindHumidity
Now 27° Mostly Clear 4% 6 mph SW 80%
3 AM 26° Mostly Clear 4% 6 mph SW 84%
4 AM 26° Mostly Clear 3% 6 mph SW 86%
5 AM 23° Mostly Clear 3% 6 mph SW 87%
6 AM 23° Partly Cloudy 3% 5 mph SW 88%
7 AM 25° Mostly Clear 3% 6 mph WSW 81%
8 AM 27° Mostly Clear 3% 6 mph W 72%
9 AM 29° Mostly Clear 3% 6 mph W 63%
10 AM 31° Mostly Clear 12% 6 mph W 56%
11 AM 33° Clear 16% 6 mph W 49%
12 PM 35° Clear 16% 6 mph W 42%
1 PM 37° Mostly Clear 15% 5 mph W 42%
2 PM 36° Partly Cloudy 15% 5 mph W 44%
3 PM 36° Partly Cloudy 15% 5 mph W 46%
4 PM 35° Partly Cloudy 15% 5 mph WSW 46%
5 PM 36° Partly Cloudy 10% 6 mph SW 44%
6 PM 35° Partly Cloudy 5% 7 mph SW 44%
7 PM 34° Partly Cloudy 5% 7 mph SW 48%
8 PM 33° Partly Cloudy 5% 7 mph SW 52%
9 PM 30° Mostly Clear 5% 7 mph SW 55%
10 PM 29° Mostly Clear 9% 7 mph SW 58%
11 PM 29° Mostly Clear 9% 7 mph SW 61%
12 AM 29° Mostly Clear 9% 7 mph SW 64%
1 AM 30° Mostly Clear 9% 7 mph SW 67%
15-Day Forecast
Today
8/17
Mostly Clear
16%
24°
38°
Tue
8/18
Partly Cloudy
57%
24°
41°
Wed
8/19
Clear
57%
23°
41°
Thu
8/20
Mostly Clear
45%
22°
38°
Fri
8/21
Rain
29%
22°
39°
Sat
8/22
Drizzle
43%
23°
40°
Sun
8/23
Rain
41%
21°
41°
Mon
8/24
Clear
43%
22°
40°
Tue
8/25
Clear
19%
23°
39°
Wed
8/26
Drizzle
51%
23°
37°
Thu
8/27
Drizzle
60%
23°
38°
Fri
8/28
Clear
60%
23°
38°
Sat
8/29
Drizzle
60%
23°
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, 06:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE841 J/kg
MLCAPE674 J/kg
MUCAPE887 J/kg
SBCIN-311 J/kg
MLCIN-239 J/kg
Lifted Index-2.9
Kinematics
0–6 km Shear7 kt
0–1 km Shear8 kt
Eff. Shear24 kt
0–1 km SRH9
0–3 km SRH54
Eff. SRH101
Storm Motion165° @ 14 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell1.1
K-Index26.4
Thermo & Levels
PWAT1.62 in
0–3 km LR4.8 °C/km
700–500 LR6.0 °C/km
Total Totals45.6
LCL958 hPa
LFC697 hPa
EL195 hPa
Freezing Lvl16,060 ft