Severe Thunderstorm Watch 8:00 p. m. Severe Thunderstorm Watch 8:00 p. m. Flash Flood Warning — Simpson County, MS 7:00 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. 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 p. m.

Simpson County, Mississippi, United States

Last updated: 6:23 p. m. CDT  ·  Refresh
28°C
Feels like 33°
Overcast
▲ 36°  /  ▼ 22°
Wind
7 mph SW
Humidity
82%
Dew Point
23°
Pressure
29,60 inHg
Visibility
6 mi
UV Index
1,0
Cloud Cover
99%
Sunrise
6:28 a. m.
Sunset
7:36 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 2142 J/kg) — isolated convective development possible. Sunrise: 6:28A. M. · Sunset: 7:36P. M..

Alerts

Severe Thunderstorm Watch
Expires 8:00 p. m.
Severe Thunderstorm Watch
Expires 8:00 p. m.
Flash Flood Warning
Simpson County, MS
Expires 7:00 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.
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 p. m.
45 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
34%
7 p. m.
29°
49%
8 p. m.
28°
49%
9 p. m.
24°
28%
10 p. m.
24°
28%
11 p. m.
23°
22%
12 a. m.
23°
17%
1 a. m.
23°
3%
2 a. m.
23°
3%
3 a. m.
23°
3%
4 a. m.
22°
3%
5 a. m.
22°
3%
6 a. m.
22°
3%
7 a. m.
22°
3%
8 a. m.
24°
3%
9 a. m.
27°
3%
10 a. m.
29°
3%
11 a. m.
31°
3%
12 p. m.
32°
3%
1 p. m.
36°
3%
2 p. m.
36°
11%
3 p. m.
37°
12%
4 p. m.
36°
14%
5 p. m.
36°
15%
7-Day Forecast
Tonight
36° 22°
Overcast with a 34% chance of rain.
Sat
38° 22°
Partly Cloudy with a 20% chance of rain.
Sun
37° 23°
Mostly Clear.
Mon
33° 22°
Mostly Cloudy with a 63% chance of rain.
Tue
37° 22°
Mostly Cloudy with a 34% chance of rain.
Wed
34° 22°
Rain, 72% chance.
Thu
35° 22°
Drizzle, 69% chance.
TimeTempConditionsPrecipWindHumidity
Now 28° Overcast 34% 7 mph SW 82%
7 p. m. 29° Overcast 49% 6 mph SSW 86%
8 p. m. 28° Overcast 49% 4 mph SSW 88%
9 p. m. 24° Overcast 28% 3 mph SW 90%
10 p. m. 24° Mostly Cloudy 28% 3 mph WSW 91%
11 p. m. 23° Mostly Cloudy 22% 3 mph SW 92%
12 a. m. 23° Mostly Cloudy 17% 3 mph WSW 93%
1 a. m. 23° Mostly Cloudy 3% 3 mph WSW 94%
2 a. m. 23° Mostly Cloudy 3% 3 mph WSW 94%
3 a. m. 23° Mostly Cloudy 3% 3 mph W 94%
4 a. m. 22° Mostly Cloudy 3% 2 mph WNW 93%
5 a. m. 22° Mostly Cloudy 3% 2 mph WNW 93%
6 a. m. 22° Mostly Cloudy 3% 2 mph NW 93%
7 a. m. 22° Mostly Cloudy 3% 2 mph NW 91%
8 a. m. 24° Mostly Cloudy 3% 2 mph NW 84%
9 a. m. 27° Partly Cloudy 3% 3 mph NNW 76%
10 a. m. 29° Partly Cloudy 3% 3 mph NNW 69%
11 a. m. 31° Partly Cloudy 3% 3 mph N 60%
12 p. m. 32° Partly Cloudy 3% 4 mph N 53%
1 p. m. 36° Partly Cloudy 3% 4 mph N 48%
2 p. m. 36° Partly Cloudy 11% 3 mph N 44%
3 p. m. 37° Partly Cloudy 12% 3 mph NNE 41%
4 p. m. 36° Partly Cloudy 14% 3 mph NNE 40%
5 p. m. 36° Mostly Clear 15% 3 mph NE 44%
15-Day Forecast
Today
8/21
Overcast
34%
22°
36°
Sat
8/22
Partly Cloudy
20%
22°
38°
Sun
8/23
Mostly Clear
16%
23°
37°
Mon
8/24
Mostly Cloudy
63%
22°
33°
Tue
8/25
Mostly Cloudy
34%
22°
37°
Wed
8/26
Rain
72%
22°
34°
Thu
8/27
Drizzle
69%
22°
35°
Fri
8/28
Rain
63%
23°
37°
Sat
8/29
Thunderstorm
47%
22°
38°
Sun
8/30
Drizzle
54%
22°
38°
Mon
8/31
Drizzle
52%
22°
38°
Tue
9/1
Drizzle
60%
23°
38°
Wed
9/2
Drizzle
60%
23°
38°
Thu
9/3
Drizzle
60%
23°
38°
Fri
9/4
Drizzle
60%
22°
38°
45
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
45 AQI 8.1 µg/m³
O3
Ground-level ozone
38 AQI 42 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 45 Good 38 45
Sun 44 Good 44 41
Mon 50 Good 40 50
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, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1741 J/kg
MLCAPE2412 J/kg
MUCAPE3173 J/kg
SBCIN-194 J/kg
MLCIN-119 J/kg
Lifted Index-5.1
Kinematics
0–6 km Shear17 kt
0–1 km Shear11 kt
Eff. Shear24 kt
0–1 km SRH61
0–3 km SRH107
Eff. SRH107
Storm Motion32° @ 15 kt
0–1 km EHI0.7
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell4.2
K-Index36.2
Thermo & Levels
PWAT2.17 in
0–3 km LR5.9 °C/km
700–500 LR6.1 °C/km
Total Totals53.2
LCL925 hPa
LFC764 hPa
EL158 hPa
Freezing Lvl14,888 ft