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

Gregg County, Texas, United States

Last updated: 5:06 PM CDT  ·  Refresh
37°C
Feels like 41°
Mostly Cloudy
▲ 38°  /  ▼ 24°
Wind
7 mph W
Humidity
40%
Dew Point
19°
Pressure
29.61 inHg
Visibility
10 mi
UV Index
4.2
Cloud Cover
79%
Sunrise
6:47 AM
Sunset
7:57 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Gregg County is currently mostly cloudy at 37°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1572 J/kg) — isolated convective development possible. Sunrise: 6:47AM · Sunset: 7:57PM.

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
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
37°
35%
6 PM
37°
32%
7 PM
35°
15%
8 PM
34°
15%
9 PM
33°
14%
10 PM
31°
7%
11 PM
31°
7%
12 AM
30°
7%
1 AM
29°
7%
2 AM
29°
7%
3 AM
28°
7%
4 AM
28°
8%
5 AM
27°
8%
6 AM
24°
5%
7 AM
24°
5%
8 AM
27°
5%
9 AM
29°
5%
10 AM
30°
5%
11 AM
31°
5%
12 PM
34°
5%
1 PM
36°
5%
2 PM
38°
7%
3 PM
38°
13%
4 PM
40°
27%
7-Day Forecast
Today
38° 24°
Mostly Cloudy with a 35% chance of rain.
Sat
42° 24°
Mostly Clear with a 35% chance of rain.
Sun
42° 23°
Mostly Clear.
Mon
41° 26°
Mostly Clear with a 32% chance of rain.
Tue
38° 24°
Partly Cloudy.
Wed
39° 24°
Rain, 63% chance.
Thu
39° 26°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 37° Mostly Cloudy 35% 7 mph W 40%
6 PM 37° Mostly Cloudy 32% 7 mph SSW 47%
7 PM 35° Overcast 15% 7 mph S 52%
8 PM 34° Overcast 15% 6 mph S 52%
9 PM 33° Mostly Cloudy 14% 6 mph S 53%
10 PM 31° Mostly Cloudy 7% 4 mph SSE 54%
11 PM 31° Partly Cloudy 7% 4 mph SSE 55%
12 AM 30° Partly Cloudy 7% 4 mph S 56%
1 AM 29° Partly Cloudy 7% 4 mph S 58%
2 AM 29° Mostly Clear 7% 4 mph S 60%
3 AM 28° Mostly Clear 7% 4 mph SSW 62%
4 AM 28° Mostly Clear 8% 3 mph SW 63%
5 AM 27° Mostly Clear 8% 3 mph SW 65%
6 AM 24° Mostly Clear 5% 4 mph SW 67%
7 AM 24° Mostly Clear 5% 4 mph SW 68%
8 AM 27° Mostly Clear 5% 4 mph WSW 62%
9 AM 29° Mostly Clear 5% 5 mph WSW 55%
10 AM 30° Mostly Clear 5% 5 mph W 48%
11 AM 31° Clear 5% 5 mph W 44%
12 PM 34° Clear 5% 4 mph W 40%
1 PM 36° Clear 5% 4 mph WNW 36%
2 PM 38° Clear 7% 4 mph WSW 35%
3 PM 38° Clear 13% 5 mph S 34%
4 PM 40° Mostly Clear 27% 6 mph SSE 33%
15-Day Forecast
Today
8/21
Mostly Cloudy
35%
24°
38°
Sat
8/22
Mostly Clear
35%
24°
42°
Sun
8/23
Mostly Clear
10%
23°
42°
Mon
8/24
Mostly Clear
32%
26°
41°
Tue
8/25
Partly Cloudy
14%
24°
38°
Wed
8/26
Rain
63%
24°
39°
Thu
8/27
Rain
63%
26°
39°
Fri
8/28
Mostly Clear
19%
22°
39°
Sat
8/29
Mostly Clear
27%
24°
38°
Sun
8/30
Mostly Clear
40%
24°
41°
Mon
8/31
Clear
60%
25°
39°
Tue
9/1
Drizzle
60%
24°
39°
Wed
9/2
Drizzle
60%
24°
38°
Thu
9/3
Drizzle
60%
24°
38°
Fri
9/4
Clear
60%
23°
38°
55
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
55 AQI 11.1 µg/m³
O3
Ground-level ozone
46 AQI 51 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 55 Moderate 46 55
Sun 53 Moderate 41 53
Mon 57 Moderate 40 57
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
SBCAPE1974 J/kg
MLCAPE1767 J/kg
MUCAPE1974 J/kg
SBCIN-47 J/kg
MLCIN-64 J/kg
Lifted Index-4.9
Kinematics
0–6 km Shear16 kt
0–1 km Shear5 kt
Eff. Shear12 kt
0–1 km SRH17
0–3 km SRH26
Eff. SRH26
Storm Motion49° @ 17 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index38.0
Thermo & Levels
PWAT1.98 in
0–3 km LR8.3 °C/km
700–500 LR6.6 °C/km
Total Totals51.3
LCL775 hPa
LFC704 hPa
EL165 hPa
Freezing Lvl15,203 ft