Extreme Heat Warning — Columbia, AR, Union, AR, Caddo, LA, Bossier, LA, Webster, LA, Claiborne, LA, Lincoln, LA, Union, LA, De Soto, LA, Red River, LA, Bienville, LA, Jackson, LA, Ouachita, LA, Sabine, LA, Natchitoches, LA, Winn, LA, Grant, LA, Caldwell, LA, La Salle, LA, Wood, TX, Upshur, TX, Marion, TX, Smith, TX, Gregg, TX, Harrison, TX, Cherokee, TX, Rusk, TX, Panola, TX, Nacogdoches, TX, Shelby, TX, Angelina, TX, San Augustine, TX, Sabine, TX 9:00 PM Heat Advisory — Columbia, AR, Union, AR, Caddo, LA, Bossier, LA, Webster, LA, Claiborne, LA, Lincoln, LA, Union, LA, De Soto, LA, Red River, LA, Bienville, LA, Jackson, LA, Ouachita, LA, Sabine, LA, Natchitoches, LA, Winn, LA, Grant, LA, Caldwell, LA, La Salle, LA, Wood, TX, Upshur, TX, Marion, TX, Smith, TX, Gregg, TX, Harrison, TX, Cherokee, TX, Rusk, TX, Panola, TX, Nacogdoches, TX, Shelby, TX, Angelina, TX, San Augustine, TX, Sabine, TX 8:00 PM

Smith County, Texas, United States

Last updated: 5:06 PM CDT  ·  Refresh
36°C
Feels like 39°
Mostly Cloudy
▲ 38°  /  ▼ 24°
Wind
6 mph SSE
Humidity
38%
Dew Point
19°
Pressure
29.43 inHg
Visibility
10 mi
UV Index
4.3
Cloud Cover
78%
Sunrise
6:49 AM
Sunset
7:58 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Smith County is currently mostly cloudy at 36°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1638 J/kg) — isolated convective development possible. Sunrise: 6:49AM · Sunset: 7:58PM.

Alerts

Extreme Heat Warning
Columbia, AR, Union, AR, Caddo, LA, Bossier, LA, Webster, LA, Claiborne, LA, Lincoln, LA, Union, LA, De Soto, LA, Red River, LA, Bienville, LA, Jackson, LA, Ouachita, LA, Sabine, LA, Natchitoches, LA, Winn, LA, Grant, LA, Caldwell, LA, La Salle, LA, Wood, TX, Upshur, TX, Marion, TX, Smith, TX, Gregg, TX, Harrison, TX, Cherokee, TX, Rusk, TX, Panola, TX, Nacogdoches, TX, Shelby, TX, Angelina, TX, San Augustine, TX, Sabine, TX
Expires 9:00 PM
Heat Advisory
Columbia, AR, Union, AR, Caddo, LA, Bossier, LA, Webster, LA, Claiborne, LA, Lincoln, LA, Union, LA, De Soto, LA, Red River, LA, Bienville, LA, Jackson, LA, Ouachita, LA, Sabine, LA, Natchitoches, LA, Winn, LA, Grant, LA, Caldwell, LA, La Salle, LA, Wood, TX, Upshur, TX, Marion, TX, Smith, TX, Gregg, TX, Harrison, TX, Cherokee, TX, Rusk, TX, Panola, TX, Nacogdoches, TX, Shelby, TX, Angelina, TX, San Augustine, TX, Sabine, TX
Expires 8:00 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
36°
35%
6 PM
36°
36%
7 PM
35°
40%
8 PM
33°
27%
9 PM
32°
27%
10 PM
31°
20%
11 PM
30°
11%
12 AM
29°
12%
1 AM
29°
4%
2 AM
29°
4%
3 AM
28°
4%
4 AM
28°
4%
5 AM
28°
5%
6 AM
24°
5%
7 AM
24°
5%
8 AM
26°
5%
9 AM
28°
5%
10 AM
29°
8%
11 AM
31°
8%
12 PM
34°
8%
1 PM
35°
8%
2 PM
37°
10%
3 PM
38°
11%
4 PM
39°
15%
7-Day Forecast
Today
38° 24°
Mostly Cloudy with a 35% chance of rain.
Sat
42° 24°
Mostly Clear with a 27% chance of rain.
Sun
41° 23°
Mostly Clear.
Mon
41° 25°
Mostly Clear with a 29% chance of rain.
Tue
38° 24°
Mostly Clear.
Wed
39° 24°
Drizzle, 52% chance.
Thu
39° 25°
Mostly Clear with a 27% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 36° Mostly Cloudy 35% 6 mph SSE 38%
6 PM 36° Mostly Cloudy 36% 5 mph SE 41%
7 PM 35° Mostly Cloudy 40% 6 mph SE 43%
8 PM 33° Mostly Cloudy 27% 6 mph SSE 47%
9 PM 32° Mostly Cloudy 27% 5 mph SSE 50%
10 PM 31° Mostly Cloudy 20% 4 mph SE 53%
11 PM 30° Partly Cloudy 11% 5 mph SSE 54%
12 AM 29° Partly Cloudy 12% 5 mph S 56%
1 AM 29° Partly Cloudy 4% 6 mph S 58%
2 AM 29° Partly Cloudy 4% 6 mph S 60%
3 AM 28° Mostly Clear 4% 5 mph SSW 63%
4 AM 28° Mostly Clear 4% 5 mph SSW 65%
5 AM 28° Mostly Clear 5% 5 mph SSW 67%
6 AM 24° Mostly Clear 5% 5 mph SW 70%
7 AM 24° Clear 5% 5 mph SW 71%
8 AM 26° Mostly Clear 5% 6 mph WSW 64%
9 AM 28° Mostly Clear 5% 6 mph WSW 56%
10 AM 29° Mostly Clear 8% 7 mph WSW 50%
11 AM 31° Mostly Clear 8% 6 mph WSW 46%
12 PM 34° Mostly Clear 8% 6 mph WSW 41%
1 PM 35° Mostly Clear 8% 6 mph SW 37%
2 PM 37° Mostly Clear 10% 6 mph SSW 36%
3 PM 38° Clear 11% 6 mph S 34%
4 PM 39° Mostly Clear 15% 7 mph SSE 33%
15-Day Forecast
Today
8/21
Mostly Cloudy
35%
24°
38°
Sat
8/22
Mostly Clear
27%
24°
42°
Sun
8/23
Mostly Clear
12%
23°
41°
Mon
8/24
Mostly Clear
29%
25°
41°
Tue
8/25
Mostly Clear
8%
24°
38°
Wed
8/26
Drizzle
52%
24°
39°
Thu
8/27
Mostly Clear
27%
25°
39°
Fri
8/28
Mostly Clear
19%
22°
39°
Sat
8/29
Clear
27%
24°
38°
Sun
8/30
Mostly Clear
20%
23°
40°
Mon
8/31
Clear
25%
24°
39°
Tue
9/1
Drizzle
60%
23°
38°
Wed
9/2
Drizzle
60%
23°
38°
Thu
9/3
Clear
60%
23°
38°
Fri
9/4
Clear
60%
23°
37°
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 10.9 µg/m³
O3
Ground-level ozone
44 AQI 47 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 54 Moderate 44 54
Sun 54 Moderate 42 54
Mon 56 Moderate 39 56
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 Fri Aug 21, 20:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1907 J/kg
MLCAPE1881 J/kg
MUCAPE1913 J/kg
SBCIN-54 J/kg
MLCIN-60 J/kg
Lifted Index-5.2
Kinematics
0–6 km Shear14 kt
0–1 km Shear3 kt
Eff. Shear13 kt
0–1 km SRH13
0–3 km SRH10
Eff. SRH10
Storm Motion65° @ 17 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index38.0
Thermo & Levels
PWAT1.96 in
0–3 km LR8.0 °C/km
700–500 LR6.9 °C/km
Total Totals53.0
LCL778 hPa
LFC692 hPa
EL165 hPa
Freezing Lvl15,082 ft