Heat Advisory — Ashley, AR, Chicot, AR, Morehouse, LA, West Carroll, LA, East Carroll, LA, Richland, LA, Madison, LA, Franklin, LA, Catahoula, 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: 9:39 AM CDT  ·  Refresh
29°C
Feels like 33°
Mostly Clear
▲ 39°  /  ▼ 24°
Wind
6 mph W
Humidity
64%
Dew Point
22°
Pressure
29.79 inHg
Visibility
10 mi
UV Index
7.3
Cloud Cover
14%
Sunrise
6:31 AM
Sunset
7:44 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jefferson County is currently mostly clear at 30°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1790 J/kg) — isolated convective development possible. Sunrise: 6:31AM · Sunset: 7:44PM.

Alerts

Heat Advisory
Ashley, AR, Chicot, AR, Morehouse, LA, West Carroll, LA, East Carroll, LA, Richland, LA, Madison, LA, Franklin, LA, Catahoula, 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
49 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
3%
10 AM
32°
21%
11 AM
33°
14%
12 PM
35°
14%
1 PM
38°
20%
2 PM
38°
26%
3 PM
38°
29%
4 PM
37°
37%
5 PM
36°
42%
6 PM
33°
42%
7 PM
31°
43%
8 PM
29°
38%
9 PM
27°
39%
10 PM
26°
22%
11 PM
26°
19%
12 AM
26°
10%
1 AM
27°
5%
2 AM
27°
5%
3 AM
27°
5%
4 AM
26°
3%
5 AM
25°
3%
6 AM
24°
3%
7 AM
24°
3%
8 AM
26°
10%
7-Day Forecast
Today
39° 24°
Mostly Clear with a 42% chance of rain.
Wed
40° 24°
Mostly Clear with a 25% chance of rain.
Thu
38° 23°
Mostly Clear with a 21% chance of rain.
Fri
39° 23°
Mostly Clear with a 20% chance of rain.
Sat
38° 21°
Rain, 30% chance.
Sun
40° 22°
Clear with a 30% chance of rain.
Mon
40° 22°
Clear with a 27% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 29° Mostly Clear 3% 6 mph W 64%
10 AM 32° Clear 21% 6 mph WNW 54%
11 AM 33° Clear 14% 6 mph W 47%
12 PM 35° Clear 14% 5 mph W 41%
1 PM 38° Clear 20% 5 mph W 37%
2 PM 38° Mostly Clear 26% 5 mph W 36%
3 PM 38° Partly Cloudy 29% 5 mph WSW 35%
4 PM 37° Partly Cloudy 37% 6 mph WSW 42%
5 PM 36° Partly Cloudy 42% 7 mph WSW 55%
6 PM 33° Partly Cloudy 42% 7 mph WSW 68%
7 PM 31° Partly Cloudy 43% 6 mph SW 74%
8 PM 29° Partly Cloudy 38% 5 mph SSW 75%
9 PM 27° Partly Cloudy 39% 6 mph S 75%
10 PM 26° Partly Cloudy 22% 7 mph S 76%
11 PM 26° Partly Cloudy 19% 7 mph SSW 77%
12 AM 26° Partly Cloudy 10% 7 mph SSW 78%
1 AM 27° Partly Cloudy 5% 7 mph SW 79%
2 AM 27° Partly Cloudy 5% 7 mph SW 82%
3 AM 27° Partly Cloudy 5% 7 mph SW 86%
4 AM 26° Partly Cloudy 3% 7 mph SW 88%
5 AM 25° Partly Cloudy 3% 7 mph SW 89%
6 AM 24° Partly Cloudy 3% 7 mph SW 90%
7 AM 24° Partly Cloudy 3% 6 mph SW 85%
8 AM 26° Partly Cloudy 10% 6 mph WSW 78%
15-Day Forecast
Today
8/18
Mostly Clear
42%
24°
39°
Wed
8/19
Mostly Clear
25%
24°
40°
Thu
8/20
Mostly Clear
21%
23°
38°
Fri
8/21
Mostly Clear
20%
23°
39°
Sat
8/22
Rain
30%
21°
38°
Sun
8/23
Clear
30%
22°
40°
Mon
8/24
Clear
27%
22°
40°
Tue
8/25
Clear
43%
20°
39°
Wed
8/26
Drizzle
44%
23°
39°
Thu
8/27
Clear
44%
24°
36°
Fri
8/28
Drizzle
60%
19°
38°
Sat
8/29
Drizzle
60%
22°
37°
Sun
8/30
Drizzle
60%
21°
36°
Mon
8/31
Drizzle
60%
21°
36°
Tue
9/1
Drizzle
60%
21°
36°
49
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
49 AQI 9.0 µg/m³
O3
Ground-level ozone
33 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 49 Good 33 49
Thu 47 Good 31 47
Fri 53 Moderate 32 53
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 Aug 18, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1312 J/kg
MLCAPE77 J/kg
MUCAPE1312 J/kg
SBCIN-195 J/kg
MLCIN-299 J/kg
Lifted Index-3.7
Kinematics
0–6 km Shear3 kt
0–1 km Shear9 kt
Eff. Shear1 kt
0–1 km SRH2
0–3 km SRH-1
Eff. SRH-1
Storm Motion85° @ 9 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index34.6
Thermo & Levels
PWAT1.69 in
0–3 km LR6.4 °C/km
700–500 LR5.5 °C/km
Total Totals44.4
LCL906 hPa
LFC764 hPa
EL181 hPa
Freezing Lvl15,226 ft