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Walthall County, Mississippi, United States

Last updated: 10:55 AM CDT  ·  Refresh
31°C
Feels like 36°
Mostly Clear
▲ 36°  /  ▼ 23°
Wind
4 mph NE
Humidity
65%
Dew Point
24°
Pressure
29.54 inHg
Visibility
10 mi
UV Index
9.0
Cloud Cover
17%
Sunrise
6:10 AM
Sunset
8:02 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Walthall County is currently mostly clear at 31°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1954 J/kg) — isolated convective development possible. Sunrise: 6:10AM · Sunset: 8:02PM.

60 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
31°
8%
11 AM
33°
19%
12 PM
33°
16%
1 PM
35°
7%
2 PM
36°
7%
3 PM
36°
7%
4 PM
35°
7%
5 PM
34°
4%
6 PM
33°
3%
7 PM
32°
3%
8 PM
32°
3%
9 PM
28°
3%
10 PM
27°
3%
11 PM
26°
3%
12 AM
25°
3%
1 AM
24°
3%
2 AM
24°
3%
3 AM
24°
3%
4 AM
24°
5%
5 AM
23°
5%
6 AM
23°
5%
7 AM
24°
11%
8 AM
26°
20%
9 AM
29°
30%
7-Day Forecast
Today
36° 23°
Mostly Clear.
Wed
37° 23°
Mostly Cloudy with a 54% chance of rain.
Thu
35° 23°
Mostly Clear with a 56% chance of rain.
Fri
36° 23°
Partly Cloudy with a 57% chance of rain.
Sat
36° 23°
Drizzle, 51% chance.
Sun
36° 22°
Drizzle, 51% chance.
Mon
38° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 31° Mostly Clear 8% 4 mph NE 65%
11 AM 33° Partly Cloudy 19% 5 mph NNE 62%
12 PM 33° Partly Cloudy 16% 6 mph NNE 59%
1 PM 35° Partly Cloudy 7% 6 mph NNE 58%
2 PM 36° Partly Cloudy 7% 7 mph NNE 57%
3 PM 36° Mostly Clear 7% 8 mph NNE 56%
4 PM 35° Mostly Clear 7% 8 mph NNE 58%
5 PM 34° Partly Cloudy 4% 7 mph NNE 61%
6 PM 33° Mostly Clear 3% 6 mph NNE 65%
7 PM 32° Mostly Clear 3% 5 mph NE 67%
8 PM 32° Mostly Clear 3% 5 mph NE 69%
9 PM 28° Mostly Clear 3% 6 mph ENE 71%
10 PM 27° Mostly Clear 3% 6 mph NE 75%
11 PM 26° Mostly Clear 3% 6 mph NE 78%
12 AM 25° Mostly Clear 3% 6 mph NE 82%
1 AM 24° Mostly Clear 3% 6 mph NE 85%
2 AM 24° Partly Cloudy 3% 6 mph NNE 87%
3 AM 24° Partly Cloudy 3% 6 mph NNE 89%
4 AM 24° Partly Cloudy 5% 6 mph NNE 89%
5 AM 23° Partly Cloudy 5% 7 mph NNE 88%
6 AM 23° Partly Cloudy 5% 8 mph NNE 88%
7 AM 24° Partly Cloudy 11% 8 mph NNE 84%
8 AM 26° Partly Cloudy 20% 9 mph NE 80%
9 AM 29° Partly Cloudy 30% 10 mph NE 76%
15-Day Forecast
Today
7/21
Mostly Clear
8%
23°
36°
Wed
7/22
Mostly Cloudy
54%
23°
37°
Thu
7/23
Mostly Clear
56%
23°
35°
Fri
7/24
Partly Cloudy
57%
23°
36°
Sat
7/25
Drizzle
51%
23°
36°
Sun
7/26
Drizzle
51%
22°
36°
Mon
7/27
Clear
17%
23°
38°
Tue
7/28
Clear
18%
23°
39°
Wed
7/29
Drizzle
68%
24°
39°
Thu
7/30
Drizzle
68%
24°
38°
Fri
7/31
Drizzle
60%
24°
39°
Sat
8/1
Drizzle
60%
23°
38°
Sun
8/2
Drizzle
60%
23°
37°
Mon
8/3
Drizzle
60%
23°
37°
Tue
8/4
Drizzle
60%
22°
37°
60
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
60 AQI 13.7 µg/m³
O3
Ground-level ozone
28 AQI 30 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 60 Moderate 28 60
Thu 32 Good 29 32
Fri 48 Good 26 48
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 Tue Jul 21, 14:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2286 J/kg
MLCAPE1047 J/kg
MUCAPE2286 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-3.8
Kinematics
0–6 km Shear18 kt
0–1 km Shear12 kt
Eff. Shear25 kt
0–1 km SRH-36
0–3 km SRH-55
Eff. SRH-55
Storm Motion347° @ 26 kt
0–1 km EHI-0.5
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.8
Thermo & Levels
PWAT2.21 in
0–3 km LR6.6 °C/km
700–500 LR4.9 °C/km
Total Totals42.5
LCL906 hPa
LFC1000 hPa
EL144 hPa
Freezing Lvl17,300 ft