Severe Thunderstorm Watch 8:00 PM Severe Thunderstorm Watch 8:00 PM Excessive Heat Warning — 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, Bolivar, MS, Sunflower, MS, Leflore, MS, Washington, MS, Humphreys, MS, Holmes, MS, Grenada, MS, Carroll, 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, Scott, MS, Newton, MS, Lauderdale, MS, Smith, MS, Jasper, MS, Clarke, MS, Covington, MS, Jones, MS, Lamar, MS, Forrest, MS 8:00 PM

Jefferson County, Mississippi, 39069, United States

Last updated: 7:17 PM CDT  ·  Refresh
23°C
Feels like 26°
Overcast
▲ 38°  /  ▼ 21°
Wind
7 mph S
Humidity
92%
Dew Point
22°
Pressure
29.69 inHg
Visibility
10 mi
UV Index
0.5
Cloud Cover
95%
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 overcast at 23°C. Precipitation is likely — peak probability 56% around 7 PM. Atmospheric instability is elevated (CAPE up to 2654 J/kg) — isolated convective development possible. Sunrise: 6:33AM · Sunset: 7:40PM.

Alerts

Severe Thunderstorm Watch
Expires 8:00 PM
Severe Thunderstorm Watch
Expires 8:00 PM
Excessive Heat Warning
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, Bolivar, MS, Sunflower, MS, Leflore, MS, Washington, MS, Humphreys, MS, Holmes, MS, Grenada, MS, Carroll, 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, Scott, MS, Newton, MS, Lauderdale, MS, Smith, MS, Jasper, MS, Clarke, MS, Covington, MS, Jones, MS, Lamar, MS, Forrest, MS
Expires 8:00 PM
42 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
56%
8 PM
26°
51%
9 PM
24°
28%
10 PM
24°
28%
11 PM
24°
19%
12 AM
24°
19%
1 AM
24°
3%
2 AM
24°
3%
3 AM
24°
3%
4 AM
24°
3%
5 AM
21°
3%
6 AM
21°
3%
7 AM
22°
3%
8 AM
24°
8%
9 AM
27°
8%
10 AM
29°
18%
11 AM
31°
18%
12 PM
32°
19%
1 PM
36°
21%
2 PM
37°
21%
3 PM
37°
22%
4 PM
37°
22%
5 PM
35°
22%
6 PM
34°
27%
7-Day Forecast
Tonight
38° 21°
Overcast with a 56% chance of rain.
Sat
39° 21°
Mostly Clear with a 28% chance of rain.
Sun
38° 24°
Partly Cloudy with a 26% chance of rain.
Mon
33° 23°
Partly Cloudy with a 53% chance of rain.
Tue
37° 24°
Clear.
Wed
35° 23°
Rain, 69% chance.
Thu
34° 22°
Rain, 67% chance.
TimeTempConditionsPrecipWindHumidity
Now 23° Overcast 56% 7 mph S 92%
8 PM 26° Overcast 51% 6 mph S 91%
9 PM 24° Overcast 28% 5 mph SSW 90%
10 PM 24° Overcast 28% 5 mph SW 90%
11 PM 24° Mostly Cloudy 19% 4 mph SW 90%
12 AM 24° Mostly Cloudy 19% 4 mph SW 89%
1 AM 24° Mostly Cloudy 3% 3 mph WSW 88%
2 AM 24° Partly Cloudy 3% 3 mph WSW 89%
3 AM 24° Partly Cloudy 3% 3 mph WSW 89%
4 AM 24° Partly Cloudy 3% 3 mph WSW 89%
5 AM 21° Partly Cloudy 3% 2 mph WSW 89%
6 AM 21° Partly Cloudy 3% 3 mph WSW 90%
7 AM 22° Partly Cloudy 3% 3 mph W 88%
8 AM 24° Partly Cloudy 8% 3 mph WNW 80%
9 AM 27° Partly Cloudy 8% 3 mph NW 71%
10 AM 29° Partly Cloudy 18% 4 mph NNW 63%
11 AM 31° Partly Cloudy 18% 3 mph NNW 56%
12 PM 32° Partly Cloudy 19% 4 mph N 49%
1 PM 36° Mostly Clear 21% 4 mph N 42%
2 PM 37° Mostly Clear 21% 4 mph N 38%
3 PM 37° Mostly Clear 22% 4 mph NNE 34%
4 PM 37° Mostly Clear 22% 3 mph NNE 33%
5 PM 35° Mostly Clear 22% 3 mph NNE 36%
6 PM 34° Mostly Clear 27% 2 mph ENE 39%
15-Day Forecast
Today
8/21
Overcast
56%
21°
38°
Sat
8/22
Mostly Clear
28%
21°
39°
Sun
8/23
Partly Cloudy
26%
24°
38°
Mon
8/24
Partly Cloudy
53%
23°
33°
Tue
8/25
Clear
19%
24°
37°
Wed
8/26
Rain
69%
23°
35°
Thu
8/27
Rain
67%
22°
34°
Fri
8/28
Drizzle
54%
23°
37°
Sat
8/29
Rain
66%
22°
38°
Sun
8/30
Partly Cloudy
39%
22°
38°
Mon
8/31
Drizzle
60%
23°
37°
Tue
9/1
Drizzle
60%
23°
37°
Wed
9/2
Drizzle
60%
23°
37°
Thu
9/3
Drizzle
60%
23°
37°
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
Today 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, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE301 J/kg
MLCAPE1641 J/kg
MUCAPE2247 J/kg
SBCIN-504 J/kg
MLCIN-265 J/kg
Lifted Index-1.7
Kinematics
0–6 km Shear27 kt
0–1 km Shear15 kt
Eff. Shear28 kt
0–1 km SRH78
0–3 km SRH140
Eff. SRH126
Storm Motion33° @ 22 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.1
STP (eff)0.0
Supercell4.1
K-Index38.5
Thermo & Levels
PWAT2.18 in
0–3 km LR4.1 °C/km
700–500 LR6.0 °C/km
Total Totals50.5
LCL986 hPa
LFC684 hPa
EL299 hPa
Freezing Lvl15,010 ft