Heat Advisory — Grayson, TX, Fannin, TX, Lamar, TX, Denton, TX, Collin, TX, Hunt, TX, Delta, TX, Hopkins, TX, Tarrant, TX, Dallas, TX, Rockwall, TX, Kaufman, TX, Van Zandt, TX, Rains, TX, Johnson, TX, Ellis, TX, Henderson, TX, Hill, TX, Navarro, TX, Freestone, TX, Anderson, TX, Bell, TX, McLennan, TX, Falls, TX, Limestone, TX, Leon, TX, Milam, TX, Robertson, TX 8:00 PM

Henderson County, Texas, United States

Last updated: 3:49 PM CDT  ·  Refresh
36°C
Feels like 38°
Clear
▲ 37°  /  ▼ 22°
Wind
9 mph S
Humidity
34%
Dew Point
20°
Pressure
29,43 inHg
Visibility
10 mi
UV Index
7,8
Cloud Cover
3%
Sunrise
7:05 AM
Sunset
7:31 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Henderson County is currently clear at 36°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1927 J/kg) — isolated convective development possible. Sunrise: 7:05AM · Sunset: 7:31PM.

Alerts

Heat Advisory
Grayson, TX, Fannin, TX, Lamar, TX, Denton, TX, Collin, TX, Hunt, TX, Delta, TX, Hopkins, TX, Tarrant, TX, Dallas, TX, Rockwall, TX, Kaufman, TX, Van Zandt, TX, Rains, TX, Johnson, TX, Ellis, TX, Henderson, TX, Hill, TX, Navarro, TX, Freestone, TX, Anderson, TX, Bell, TX, McLennan, TX, Falls, TX, Limestone, TX, Leon, TX, Milam, TX, Robertson, TX
Expires 8:00 PM
34 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
36°
3%
4 PM
37°
3%
5 PM
37°
3%
6 PM
35°
3%
7 PM
33°
3%
8 PM
32°
3%
9 PM
31°
3%
10 PM
29°
3%
11 PM
29°
3%
12 AM
28°
3%
1 AM
27°
3%
2 AM
27°
3%
3 AM
26°
3%
4 AM
26°
3%
5 AM
23°
3%
6 AM
22°
3%
7 AM
23°
3%
8 AM
25°
3%
9 AM
26°
3%
10 AM
29°
3%
11 AM
30°
3%
12 PM
31°
3%
1 PM
34°
3%
2 PM
34°
3%
7-Day Forecast
Today
37° 22°
Clear.
Mon
39° 22°
Mostly Clear.
Tue
38° 21°
Partly Cloudy.
Wed
36° 21°
Clear.
Thu
36° 22°
Clear.
Fri
37° 22°
Clear.
Sat
37° 22°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 36° Clear 3% 9 mph S 34%
4 PM 37° Clear 3% 10 mph SSE 34%
5 PM 37° Clear 3% 10 mph SSE 37%
6 PM 35° Clear 3% 9 mph SSE 40%
7 PM 33° Clear 3% 8 mph SSE 46%
8 PM 32° Clear 3% 7 mph SSE 53%
9 PM 31° Clear 3% 8 mph S 61%
10 PM 29° Clear 3% 8 mph S 68%
11 PM 29° Mostly Clear 3% 8 mph S 72%
12 AM 28° Mostly Clear 3% 7 mph S 76%
1 AM 27° Mostly Clear 3% 7 mph S 79%
2 AM 27° Mostly Clear 3% 6 mph S 81%
3 AM 26° Clear 3% 6 mph S 84%
4 AM 26° Clear 3% 6 mph S 87%
5 AM 23° Clear 3% 6 mph S 90%
6 AM 22° Clear 3% 5 mph S 92%
7 AM 23° Mostly Clear 3% 6 mph S 88%
8 AM 25° Mostly Clear 3% 7 mph SSW 80%
9 AM 26° Mostly Clear 3% 8 mph SSW 74%
10 AM 29° Mostly Clear 3% 8 mph SSW 68%
11 AM 30° Clear 3% 8 mph SSW 62%
12 PM 31° Clear 3% 8 mph S 56%
1 PM 34° Clear 3% 9 mph S 54%
2 PM 34° Mostly Clear 3% 9 mph S 52%
15-Day Forecast
Today
9/13
Clear
3%
22°
37°
Mon
9/14
Mostly Clear
3%
22°
39°
Tue
9/15
Partly Cloudy
3%
21°
38°
Wed
9/16
Clear
8%
21°
36°
Thu
9/17
Clear
19%
22°
36°
Fri
9/18
Clear
9%
22°
37°
Sat
9/19
Clear
19%
22°
37°
Sun
9/20
Clear
60%
22°
35°
Mon
9/21
Drizzle
60%
20°
34°
Tue
9/22
Drizzle
60%
17°
33°
Wed
9/23
Drizzle
60%
18°
32°
Thu
9/24
Drizzle
60%
20°
32°
Fri
9/25
Clear
25%
20°
32°
Sat
9/26
Clear
25%
19°
32°
Sun
9/27
Drizzle
60%
19°
32°
34
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
34 AQI 6.2 µg/m³
O3
Ground-level ozone
29 AQI 31 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 34 Good 29 34
Tue 30 Good 30 27
Wed 27 Good 27 27
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 dim. sept. 13, 19:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1732 J/kg
MLCAPE740 J/kg
MUCAPE1732 J/kg
SBCIN0 J/kg
MLCIN-46 J/kg
Lifted Index-3.8
Kinematics
0–6 km Shear9 kt
0–1 km Shear1 kt
Eff. Shear11 kt
0–1 km SRH-1
0–3 km SRH14
Eff. SRH14
Storm Motion119° @ 16 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index31.5
Thermo & Levels
PWAT1.68 in
0–3 km LR8.4 °C/km
700–500 LR5.8 °C/km
Total Totals44.9
LCL785 hPa
LFC997 hPa
EL162 hPa
Freezing Lvl16,388 ft