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 7:00 PM

Simpson County, Mississippi, United States

Last updated: 7:48 PM CDT  ·  Refresh
33°C
Feels like 37°
Clear
▲ 37°  /  ▼ 23°
Wind
4 mph SW
Humidity
50%
Dew Point
21°
Pressure
29.57 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
7%
Sunrise
6:22 AM
Sunset
7:46 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Simpson County is currently clear at 33°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2377 J/kg) — isolated convective development possible. Sunrise: 6:22AM · Sunset: 7:46PM.

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 7:00 PM
30 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
11%
8 PM
32°
15%
9 PM
29°
7%
10 PM
28°
7%
11 PM
27°
3%
12 AM
27°
3%
1 AM
26°
3%
2 AM
26°
3%
3 AM
26°
3%
4 AM
25°
3%
5 AM
24°
3%
6 AM
24°
3%
7 AM
26°
3%
8 AM
27°
8%
9 AM
30°
8%
10 AM
32°
8%
11 AM
33°
8%
12 PM
34°
8%
1 PM
36°
9%
2 PM
38°
9%
3 PM
39°
9%
4 PM
38°
9%
5 PM
36°
3%
6 PM
34°
3%
7-Day Forecast
Tonight
37° 23°
Clear.
Thu
39° 24°
Mostly Clear.
Fri
39° 22°
Mostly Clear.
Sat
40° 22°
Mostly Clear.
Sun
41° 24°
Clear with a 30% chance of rain.
Mon
41° 22°
Clear.
Tue
42° 23°
Rain, 28% chance.
TimeTempConditionsPrecipWindHumidity
Now 33° Clear 11% 4 mph SW 50%
8 PM 32° Clear 15% 5 mph SW 55%
9 PM 29° Clear 7% 5 mph SSW 59%
10 PM 28° Clear 7% 5 mph SSW 63%
11 PM 27° Clear 3% 5 mph SSW 68%
12 AM 27° Clear 3% 5 mph SSW 72%
1 AM 26° Clear 3% 5 mph SW 76%
2 AM 26° Clear 3% 6 mph SW 80%
3 AM 26° Clear 3% 6 mph SW 84%
4 AM 25° Clear 3% 6 mph SW 86%
5 AM 24° Clear 3% 5 mph SW 88%
6 AM 24° Clear 3% 5 mph WSW 90%
7 AM 26° Clear 3% 6 mph WSW 84%
8 AM 27° Clear 8% 8 mph WSW 75%
9 AM 30° Mostly Clear 8% 8 mph WSW 67%
10 AM 32° Mostly Clear 8% 8 mph WSW 61%
11 AM 33° Mostly Clear 8% 8 mph WSW 55%
12 PM 34° Mostly Clear 8% 7 mph WSW 49%
1 PM 36° Mostly Clear 9% 7 mph WSW 46%
2 PM 38° Mostly Clear 9% 7 mph SW 43%
3 PM 39° Mostly Clear 9% 7 mph SW 41%
4 PM 38° Mostly Clear 9% 6 mph SW 43%
5 PM 36° Mostly Clear 3% 6 mph SW 46%
6 PM 34° Mostly Clear 3% 6 mph SW 49%
15-Day Forecast
Today
8/12
Clear
11%
23°
37°
Thu
8/13
Mostly Clear
9%
24°
39°
Fri
8/14
Mostly Clear
7%
22°
39°
Sat
8/15
Mostly Clear
14%
22°
40°
Sun
8/16
Clear
30%
24°
41°
Mon
8/17
Clear
17%
22°
41°
Tue
8/18
Rain
28%
23°
42°
Wed
8/19
Rain
18%
22°
41°
Thu
8/20
Drizzle
44%
22°
42°
Fri
8/21
Clear
51%
22°
42°
Sat
8/22
Drizzle
60%
23°
41°
Sun
8/23
Drizzle
60%
23°
40°
Mon
8/24
Drizzle
60%
23°
39°
Tue
8/25
Drizzle
60%
23°
39°
Wed
8/26
Drizzle
60%
22°
39°
30
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
27 AQI 4.9 µg/m³
O3
Ground-level ozone
Dominant
30 AQI 33 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 30 Good 30 27
Fri 21 Good 21 20
Sat 54 Moderate 29 54
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 Wed Aug 12, 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
SBCAPE1586 J/kg
MLCAPE1395 J/kg
MUCAPE1586 J/kg
SBCIN-120 J/kg
MLCIN0 J/kg
Lifted Index-2.8
Kinematics
0–6 km Shear8 kt
0–1 km Shear5 kt
Eff. Shear4 kt
0–1 km SRH19
0–3 km SRH34
Eff. SRH34
Storm Motion332° @ 15 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index30.6
Thermo & Levels
PWAT1.66 in
0–3 km LR7.5 °C/km
700–500 LR5.5 °C/km
Total Totals46.7
LCL834 hPa
LFC785 hPa
EL175 hPa
Freezing Lvl16,860 ft