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

Harrison County, Texas, United States

Last updated: 5:05 PM CDT  ·  Refresh
37°C
Feels like 39°
Mostly Cloudy
▲ 38°  /  ▼ 23°
Wind
5 mph NNE
Humidity
33%
Dew Point
18°
Pressure
29.57 inHg
Visibility
10 mi
UV Index
4.5
Cloud Cover
76%
Sunrise
6:45 AM
Sunset
7:55 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Harrison County is currently mostly cloudy at 37°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1319 J/kg) — isolated convective development possible. Sunrise: 6:45AM · Sunset: 7:55PM.

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
56 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
37°
21%
6 PM
37°
16%
7 PM
35°
16%
8 PM
33°
15%
9 PM
32°
14%
10 PM
29°
7%
11 PM
28°
7%
12 AM
27°
7%
1 AM
27°
7%
2 AM
27°
7%
3 AM
26°
7%
4 AM
26°
4%
5 AM
25°
5%
6 AM
23°
5%
7 AM
23°
5%
8 AM
26°
5%
9 AM
28°
5%
10 AM
29°
5%
11 AM
31°
5%
12 PM
34°
3%
1 PM
36°
3%
2 PM
37°
5%
3 PM
37°
11%
4 PM
38°
19%
7-Day Forecast
Today
38° 23°
Mostly Cloudy with a 21% chance of rain.
Sat
41° 23°
Mostly Clear with a 27% chance of rain.
Sun
41° 22°
Mostly Clear.
Mon
40° 26°
Partly Cloudy with a 37% chance of rain.
Tue
38° 23°
Mostly Clear.
Wed
38° 24°
Drizzle, 53% chance.
Thu
39° 25°
Drizzle, 53% chance.
TimeTempConditionsPrecipWindHumidity
Now 37° Mostly Cloudy 21% 5 mph NNE 33%
6 PM 37° Overcast 16% 5 mph NNE 37%
7 PM 35° Mostly Cloudy 16% 6 mph WSW 43%
8 PM 33° Mostly Cloudy 15% 5 mph SSE 45%
9 PM 32° Mostly Cloudy 14% 4 mph SE 48%
10 PM 29° Mostly Cloudy 7% 4 mph S 51%
11 PM 28° Partly Cloudy 7% 5 mph S 54%
12 AM 27° Partly Cloudy 7% 5 mph SSE 58%
1 AM 27° Partly Cloudy 7% 4 mph S 61%
2 AM 27° Partly Cloudy 7% 4 mph S 64%
3 AM 26° Mostly Clear 7% 4 mph SSW 67%
4 AM 26° Mostly Clear 4% 4 mph SW 69%
5 AM 25° Mostly Clear 5% 3 mph SW 69%
6 AM 23° Mostly Clear 5% 4 mph SW 69%
7 AM 23° Mostly Clear 5% 4 mph SW 69%
8 AM 26° Mostly Clear 5% 3 mph WSW 63%
9 AM 28° Mostly Clear 5% 4 mph W 55%
10 AM 29° Mostly Clear 5% 5 mph W 50%
11 AM 31° Mostly Clear 5% 4 mph W 45%
12 PM 34° Mostly Clear 3% 4 mph W 40%
1 PM 36° Mostly Clear 3% 5 mph WSW 35%
2 PM 37° Clear 5% 4 mph SW 34%
3 PM 37° Clear 11% 4 mph SSW 34%
4 PM 38° Clear 19% 4 mph SE 33%
15-Day Forecast
Today
8/21
Mostly Cloudy
21%
23°
38°
Sat
8/22
Mostly Clear
27%
23°
41°
Sun
8/23
Mostly Clear
12%
22°
41°
Mon
8/24
Partly Cloudy
37%
26°
40°
Tue
8/25
Mostly Clear
10%
23°
38°
Wed
8/26
Drizzle
53%
24°
38°
Thu
8/27
Drizzle
53%
25°
39°
Fri
8/28
Mostly Clear
19%
22°
39°
Sat
8/29
Mostly Clear
27%
24°
38°
Sun
8/30
Drizzle
47%
23°
41°
Mon
8/31
Mostly Clear
25%
25°
40°
Tue
9/1
Drizzle
60%
24°
39°
Wed
9/2
Drizzle
60%
24°
38°
Thu
9/3
Drizzle
60%
24°
39°
Fri
9/4
Clear
60%
24°
38°
56
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
56 AQI 11.6 µg/m³
O3
Ground-level ozone
48 AQI 52 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sat 56 Moderate 48 56
Sun 52 Moderate 39 52
Mon 61 Moderate 61 60
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
SBCAPE1677 J/kg
MLCAPE1782 J/kg
MUCAPE1944 J/kg
SBCIN-38 J/kg
MLCIN-52 J/kg
Lifted Index-4.1
Kinematics
0–6 km Shear13 kt
0–1 km Shear4 kt
Eff. Shear8 kt
0–1 km SRH13
0–3 km SRH26
Eff. SRH26
Storm Motion34° @ 19 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index38.6
Thermo & Levels
PWAT2.00 in
0–3 km LR8.5 °C/km
700–500 LR6.5 °C/km
Total Totals50.8
LCL761 hPa
LFC699 hPa
EL168 hPa
Freezing Lvl15,007 ft