Severe Thunderstorm Warning — Adams County, MS, Copiah County, MS, Franklin County, MS, Jefferson County, MS, Lincoln County, MS 5:15 PM Severe Thunderstorm Watch 8:00 PM Severe Thunderstorm Watch 8:00 PM Extreme Heat Warning — Morehouse, LA, West Carroll, LA, East Carroll, LA, Richland, LA, Madison, LA, Franklin, LA, Catahoula, LA, Tensas, LA, Concordia, LA, Issaquena, MS, Sharkey, MS, Yazoo, MS, Madison, MS, Warren, MS, Hinds, MS, Rankin, MS, Claiborne, MS, Copiah, MS, Simpson, MS, Jefferson, MS, Adams, MS, Franklin, MS, Lincoln, MS, Lawrence, MS, Jefferson Davis, MS, Marion, MS 8:00 PM Heat Advisory — Morehouse, LA, West Carroll, LA, East Carroll, LA, Richland, LA, Madison, LA, Franklin, LA, Catahoula, LA, Tensas, LA, Concordia, LA, Issaquena, MS, Sharkey, MS, Yazoo, MS, Madison, MS, Warren, MS, Hinds, MS, Rankin, MS, Claiborne, MS, Copiah, MS, Simpson, MS, Jefferson, MS, Adams, MS, Franklin, MS, Lincoln, MS, Lawrence, MS, Jefferson Davis, MS, Marion, MS 8:00 PM

Jefferson County, Mississippi, 39069, United States

Last updated: 5:03 PM CDT  ·  Refresh
34°C
Feels like 40°
Mostly Cloudy
▲ 38°  /  ▼ 22°
Wind
6 mph WNW
Humidity
52%
Dew Point
23°
Pressure
29.67 inHg
Visibility
8 mi
UV Index
5.1
Cloud Cover
65%
Sunrise
6:33 AM
Sunset
7:40 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Jefferson County is currently mostly cloudy at 34°C. Precipitation is likely — peak probability 53% around 5 PM. Atmospheric instability is elevated (CAPE up to 2086 J/kg) — isolated convective development possible. Sunrise: 6:33AM · Sunset: 7:40PM.

Alerts

Severe Thunderstorm Warning
Adams County, MS, Copiah County, MS, Franklin County, MS, Jefferson County, MS, Lincoln County, MS
Expires 5:15 PM
Severe Thunderstorm Watch
Expires 8:00 PM
Severe Thunderstorm Watch
Expires 8:00 PM
Extreme Heat Warning
Morehouse, LA, West Carroll, LA, East Carroll, LA, Richland, LA, Madison, LA, Franklin, LA, Catahoula, LA, Tensas, LA, Concordia, LA, Issaquena, MS, Sharkey, MS, Yazoo, MS, Madison, MS, Warren, MS, Hinds, MS, Rankin, MS, Claiborne, MS, Copiah, MS, Simpson, MS, Jefferson, MS, Adams, MS, Franklin, MS, Lincoln, MS, Lawrence, MS, Jefferson Davis, MS, Marion, MS
Expires 8:00 PM
Heat Advisory
Morehouse, LA, West Carroll, LA, East Carroll, LA, Richland, LA, Madison, LA, Franklin, LA, Catahoula, LA, Tensas, LA, Concordia, LA, Issaquena, MS, Sharkey, MS, Yazoo, MS, Madison, MS, Warren, MS, Hinds, MS, Rankin, MS, Claiborne, MS, Copiah, MS, Simpson, MS, Jefferson, MS, Adams, MS, Franklin, MS, Lincoln, MS, Lawrence, MS, Jefferson Davis, MS, Marion, MS
Expires 8:00 PM
42 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
34°
53%
6 PM
33°
35%
7 PM
30°
21%
8 PM
29°
23%
9 PM
29°
17%
10 PM
27°
18%
11 PM
27°
16%
12 AM
26°
12%
1 AM
26°
6%
2 AM
25°
6%
3 AM
24°
6%
4 AM
24°
6%
5 AM
24°
6%
6 AM
22°
3%
7 AM
22°
3%
8 AM
24°
8%
9 AM
27°
8%
10 AM
28°
19%
11 AM
29°
19%
12 PM
33°
19%
1 PM
34°
20%
2 PM
37°
20%
3 PM
37°
20%
4 PM
39°
22%
7-Day Forecast
Today
38° 22°
Mostly Cloudy with a 53% chance of rain.
Sat
41° 22°
Partly Cloudy with a 25% chance of rain.
Sun
40° 24°
Mostly Clear with a 40% chance of rain.
Mon
36° 23°
Partly Cloudy with a 48% chance of rain.
Tue
36° 23°
Mostly Clear with a 45% chance of rain.
Wed
36° 23°
Rain, 83% chance.
Thu
33° 22°
Rain, 66% chance.
TimeTempConditionsPrecipWindHumidity
Now 34° Mostly Cloudy 53% 6 mph WNW 52%
6 PM 33° Mostly Cloudy 35% 9 mph WSW 68%
7 PM 30° Overcast 21% 8 mph SSE 80%
8 PM 29° Overcast 23% 6 mph S 80%
9 PM 29° Mostly Cloudy 17% 4 mph SSW 80%
10 PM 27° Mostly Cloudy 18% 4 mph SW 79%
11 PM 27° Mostly Cloudy 16% 4 mph SW 80%
12 AM 26° Mostly Cloudy 12% 4 mph SW 82%
1 AM 26° Mostly Cloudy 6% 4 mph SW 84%
2 AM 25° Mostly Cloudy 6% 3 mph SW 86%
3 AM 24° Partly Cloudy 6% 3 mph WSW 87%
4 AM 24° Partly Cloudy 6% 2 mph WSW 88%
5 AM 24° Partly Cloudy 6% 2 mph WSW 88%
6 AM 22° Partly Cloudy 3% 3 mph SW 88%
7 AM 22° Partly Cloudy 3% 3 mph SW 87%
8 AM 24° Partly Cloudy 8% 3 mph W 80%
9 AM 27° Partly Cloudy 8% 3 mph W 68%
10 AM 28° Partly Cloudy 19% 4 mph WNW 61%
11 AM 29° Partly Cloudy 19% 4 mph NW 56%
12 PM 33° Partly Cloudy 19% 4 mph NW 50%
1 PM 34° Partly Cloudy 20% 4 mph NNW 45%
2 PM 37° Partly Cloudy 20% 4 mph NNW 42%
3 PM 37° Partly Cloudy 20% 4 mph N 39%
4 PM 39° Mostly Clear 22% 4 mph NNE 37%
15-Day Forecast
Today
8/21
Mostly Cloudy
53%
22°
38°
Sat
8/22
Partly Cloudy
25%
22°
41°
Sun
8/23
Mostly Clear
40%
24°
40°
Mon
8/24
Partly Cloudy
48%
23°
36°
Tue
8/25
Mostly Clear
45%
23°
36°
Wed
8/26
Rain
83%
23°
36°
Thu
8/27
Rain
66%
22°
33°
Fri
8/28
Drizzle
54%
22°
37°
Sat
8/29
Drizzle
47%
23°
36°
Sun
8/30
Rain
59%
22°
39°
Mon
8/31
Drizzle
60%
23°
38°
Tue
9/1
Clear
60%
23°
38°
Wed
9/2
Drizzle
60%
23°
38°
Thu
9/3
Drizzle
60%
23°
38°
Fri
9/4
Drizzle
60%
22°
37°
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 7.6 µg/m³
O3
Ground-level ozone
38 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 42 Good 38 42
Sun 46 Good 46 45
Mon 51 Moderate 37 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 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
SBCAPE3619 J/kg
MLCAPE3510 J/kg
MUCAPE4056 J/kg
SBCIN-51 J/kg
MLCIN-57 J/kg
Lifted Index-7.4
Kinematics
0–6 km Shear12 kt
0–1 km Shear5 kt
Eff. Shear11 kt
0–1 km SRH14
0–3 km SRH69
Eff. SRH69
Storm Motion37° @ 15 kt
0–1 km EHI0.3
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index43.8
Thermo & Levels
PWAT2.30 in
0–3 km LR8.0 °C/km
700–500 LR6.0 °C/km
Total Totals52.3
LCL850 hPa
LFC803 hPa
EL142 hPa
Freezing Lvl14,993 ft