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 p. m.

Simpson County, Mississippi, United States

Last updated: 9:36 a. m. CDT  ·  Refresh
30°C
Feels like 33°
Mostly Clear
▲ 39°  /  ▼ 24°
Wind
7 mph WNW
Humidity
63%
Dew Point
22°
Pressure
29,71 inHg
Visibility
10 mi
UV Index
7,3
Cloud Cover
18%
Sunrise
6:26 a. m.
Sunset
7:40 p. m.
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Simpson County is currently mostly clear at 30°C. Precipitation is likely — peak probability 64% around 7 p. m.. Atmospheric instability is elevated (CAPE up to 1962 J/kg) — isolated convective development possible. Sunrise: 6:26A. M. · Sunset: 7:40P. M..

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 p. m.
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
30°
3%
10 a. m.
32°
23%
11 a. m.
34°
23%
12 p. m.
36°
23%
1 p. m.
38°
29%
2 p. m.
39°
38%
3 p. m.
39°
33%
4 p. m.
37°
55%
5 p. m.
36°
63%
6 p. m.
34°
52%
7 p. m.
32°
63%
8 p. m.
31°
53%
9 p. m.
26°
46%
10 p. m.
26°
22%
11 p. m.
25°
23%
12 a. m.
24°
23%
1 a. m.
26°
9%
2 a. m.
26°
9%
3 a. m.
26°
5%
4 a. m.
24°
5%
5 a. m.
24°
5%
6 a. m.
24°
3%
7 a. m.
24°
10%
8 a. m.
26°
21%
7-Day Forecast
Today
39° 24°
Mostly Clear with a 52% chance of rain.
Wed
41° 24°
Mostly Clear with a 57% chance of rain.
Thu
40° 23°
Clear with a 42% chance of rain.
Fri
39° 22°
Clear with a 57% chance of rain.
Sat
38° 21°
Clear.
Sun
40° 22°
Drizzle, 51% chance.
Mon
39° 21°
Clear with a 27% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 30° Mostly Clear 3% 7 mph WNW 63%
10 a. m. 32° Mostly Clear 23% 8 mph WNW 53%
11 a. m. 34° Mostly Clear 23% 8 mph WNW 46%
12 p. m. 36° Mostly Clear 23% 7 mph WNW 39%
1 p. m. 38° Mostly Clear 29% 6 mph WNW 36%
2 p. m. 39° Mostly Clear 38% 6 mph W 35%
3 p. m. 39° Mostly Clear 33% 6 mph W 35%
4 p. m. 37° Partly Cloudy 55% 7 mph W 42%
5 p. m. 36° Partly Cloudy 63% 7 mph WSW 50%
6 p. m. 34° Partly Cloudy 52% 8 mph WSW 57%
7 p. m. 32° Partly Cloudy 63% 7 mph SW 66%
8 p. m. 31° Partly Cloudy 53% 6 mph SSW 74%
9 p. m. 26° Partly Cloudy 46% 7 mph S 82%
10 p. m. 26° Partly Cloudy 22% 6 mph S 85%
11 p. m. 25° Partly Cloudy 23% 6 mph S 86%
12 a. m. 24° Partly Cloudy 23% 5 mph S 87%
1 a. m. 26° Partly Cloudy 9% 5 mph S 78%
2 a. m. 26° Mostly Clear 9% 5 mph SSW 79%
3 a. m. 26° Mostly Clear 5% 5 mph SSW 80%
4 a. m. 24° Mostly Clear 5% 5 mph SW 82%
5 a. m. 24° Mostly Clear 5% 5 mph SW 85%
6 a. m. 24° Partly Cloudy 3% 5 mph SW 87%
7 a. m. 24° Partly Cloudy 10% 5 mph WSW 84%
8 a. m. 26° Partly Cloudy 21% 6 mph WSW 77%
15-Day Forecast
Today
8/18
Mostly Clear
52%
24°
39°
Wed
8/19
Mostly Clear
57%
24°
41°
Thu
8/20
Clear
42%
23°
40°
Fri
8/21
Clear
57%
22°
39°
Sat
8/22
Clear
16%
21°
38°
Sun
8/23
Drizzle
51%
22°
40°
Mon
8/24
Clear
27%
21°
39°
Tue
8/25
Clear
43%
23°
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%
21°
37°
Sun
8/30
Drizzle
60%
21°
36°
Mon
8/31
Drizzle
60%
21°
36°
Tue
9/1
Drizzle
60%
21°
36°
54
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
54 AQI 11.0 µg/m³
O3
Ground-level ozone
40 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 54 Moderate 40 54
Thu 52 Moderate 33 52
Fri 53 Moderate 33 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 mar. ago. 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
SBCAPE1504 J/kg
MLCAPE520 J/kg
MUCAPE1682 J/kg
SBCIN-155 J/kg
MLCIN-204 J/kg
Lifted Index-3.9
Kinematics
0–6 km Shear4 kt
0–1 km Shear10 kt
Eff. Shear2 kt
0–1 km SRH51
0–3 km SRH6
Eff. SRH6
Storm Motion2° @ 15 kt
0–1 km EHI0.5
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.0
Thermo & Levels
PWAT1.87 in
0–3 km LR6.6 °C/km
700–500 LR5.5 °C/km
Total Totals45.4
LCL901 hPa
LFC781 hPa
EL173 hPa
Freezing Lvl14,895 ft