Severe Thunderstorm Warning — Covington County, MS, Jefferson Davis County, MS, Lawrence County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS 10:15 p. m. 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 p. m.

Simpson County, Mississippi, United States

Last updated: 9:21 p. m. CDT  ·  Refresh
28°C
Feels like 32°
Overcast
▲ 36°  /  ▼ 23°
Wind
8 mph SE
Humidity
85%
Dew Point
22°
Pressure
29,67 inHg
Visibility
8 mi
UV Index
0,0
Cloud Cover
96%
Sunrise
6:27 a. m.
Sunset
7:37 p. m.
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Simpson County is currently overcast at 28°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2874 J/kg) — isolated convective development possible. Sunrise: 6:27A. M. · Sunset: 7:37P. M..

Alerts

Severe Thunderstorm Warning
Covington County, MS, Jefferson Davis County, MS, Lawrence County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS
Expires 10:15 p. m.
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 p. m.
46 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
32%
10 p. m.
26°
34%
11 p. m.
26°
33%
12 a. m.
25°
33%
1 a. m.
24°
7%
2 a. m.
24°
7%
3 a. m.
24°
7%
4 a. m.
24°
7%
5 a. m.
23°
4%
6 a. m.
23°
5%
7 a. m.
24°
5%
8 a. m.
26°
5%
9 a. m.
28°
8%
10 a. m.
30°
11%
11 a. m.
32°
12%
12 p. m.
34°
24%
1 p. m.
37°
24%
2 p. m.
37°
33%
3 p. m.
36°
37%
4 p. m.
38°
47%
5 p. m.
35°
43%
6 p. m.
33°
43%
7 p. m.
32°
43%
8 p. m.
31°
43%
7-Day Forecast
Tonight
36° 23°
Overcast with a 32% chance of rain.
Fri
38° 23°
Partly Cloudy with a 42% chance of rain.
Sat
39° 22°
Partly Cloudy.
Sun
40° 24°
Partly Cloudy with a 66% chance of rain.
Mon
37° 24°
Drizzle, 50% chance.
Tue
38° 23°
Rain, 70% chance.
Wed
39° 23°
Rain, 71% chance.
TimeTempConditionsPrecipWindHumidity
Now 28° Overcast 32% 8 mph SE 85%
10 p. m. 26° Overcast 34% 7 mph ENE 88%
11 p. m. 26° Overcast 33% 2 mph NE 89%
12 a. m. 25° Mostly Cloudy 33% 3 mph S 89%
1 a. m. 24° Partly Cloudy 7% 4 mph SSW 89%
2 a. m. 24° Partly Cloudy 7% 3 mph SW 90%
3 a. m. 24° Partly Cloudy 7% 3 mph SSW 89%
4 a. m. 24° Partly Cloudy 7% 3 mph SSW 83%
5 a. m. 23° Partly Cloudy 4% 3 mph SSW 84%
6 a. m. 23° Partly Cloudy 5% 3 mph S 85%
7 a. m. 24° Partly Cloudy 5% 3 mph SSW 83%
8 a. m. 26° Partly Cloudy 5% 4 mph WSW 77%
9 a. m. 28° Partly Cloudy 8% 4 mph WSW 71%
10 a. m. 30° Partly Cloudy 11% 4 mph WSW 64%
11 a. m. 32° Mostly Clear 12% 4 mph WSW 57%
12 p. m. 34° Mostly Clear 24% 4 mph WSW 51%
1 p. m. 37° Mostly Clear 24% 4 mph W 47%
2 p. m. 37° Partly Cloudy 33% 4 mph W 48%
3 p. m. 36° Partly Cloudy 37% 5 mph W 49%
4 p. m. 38° Partly Cloudy 47% 5 mph W 52%
5 p. m. 35° Mostly Cloudy 43% 5 mph WSW 60%
6 p. m. 33° Mostly Cloudy 43% 5 mph SSW 68%
7 p. m. 32° Mostly Cloudy 43% 5 mph S 75%
8 p. m. 31° Mostly Cloudy 43% 5 mph SSW 78%
15-Day Forecast
Today
8/20
Overcast
32%
23°
36°
Fri
8/21
Partly Cloudy
42%
23°
38°
Sat
8/22
Partly Cloudy
14%
22°
39°
Sun
8/23
Partly Cloudy
66%
24°
40°
Mon
8/24
Drizzle
50%
24°
37°
Tue
8/25
Rain
70%
23°
38°
Wed
8/26
Rain
71%
23°
39°
Thu
8/27
Rain
82%
21°
36°
Fri
8/28
Drizzle
44%
21°
38°
Sat
8/29
Drizzle
44%
22°
39°
Sun
8/30
Drizzle
60%
22°
38°
Mon
8/31
Drizzle
60%
23°
38°
Tue
9/1
Drizzle
60%
22°
38°
Wed
9/2
Drizzle
60%
22°
37°
Thu
9/3
Drizzle
60%
22°
37°
46
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
46 AQI 8.2 µg/m³
O3
Ground-level ozone
37 AQI 40 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 46 Good 37 46
Sat 44 Good 39 44
Sun 46 Good 42 46
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 vie. ago. 21, 01:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1117 J/kg
MLCAPE1920 J/kg
MUCAPE2742 J/kg
SBCIN-377 J/kg
MLCIN-125 J/kg
Lifted Index-3.2
Kinematics
0–6 km Shear17 kt
0–1 km Shear2 kt
Eff. Shear20 kt
0–1 km SRH9
0–3 km SRH30
Eff. SRH43
Storm Motion54° @ 15 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell1.2
K-Index34.7
Thermo & Levels
PWAT1.97 in
0–3 km LR5.5 °C/km
700–500 LR6.0 °C/km
Total Totals49.8
LCL928 hPa
LFC720 hPa
EL209 hPa
Freezing Lvl15,449 ft