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: 12:55 AM CDT  ·  Refresh
27°C
Feels like 31°
Clear
▲ 37°  /  ▼ 23°
Wind
7 mph S
Humidity
80%
Dew Point
23°
Pressure
29.48 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
7:05 AM
Sunset
7:30 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Henderson County is currently clear at 27°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2143 J/kg) — isolated convective development possible. Sunrise: 7:05AM · Sunset: 7:30PM.

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
28°
3%
1 AM
27°
3%
2 AM
26°
3%
3 AM
26°
3%
4 AM
26°
3%
5 AM
23°
3%
6 AM
23°
3%
7 AM
23°
3%
8 AM
26°
3%
9 AM
28°
3%
10 AM
29°
3%
11 AM
31°
3%
12 PM
33°
3%
1 PM
36°
3%
2 PM
37°
3%
3 PM
37°
3%
4 PM
37°
3%
5 PM
37°
3%
6 PM
36°
3%
7 PM
34°
3%
8 PM
33°
3%
9 PM
31°
3%
10 PM
31°
3%
11 PM
30°
3%
7-Day Forecast
Today
37° 23°
Clear.
Tue
39° 23°
Clear.
Wed
37° 22°
Mostly Clear.
Thu
36° 22°
Clear.
Fri
37° 21°
Clear.
Sat
37° 21°
Rain.
Sun
35° 21°
Rain, 28% chance.
TimeTempConditionsPrecipWindHumidity
Now 28° Clear 3% 7 mph S 78%
1 AM 27° Clear 3% 7 mph S 81%
2 AM 26° Clear 3% 6 mph S 84%
3 AM 26° Clear 3% 6 mph S 87%
4 AM 26° Clear 3% 6 mph S 89%
5 AM 23° Mostly Clear 3% 6 mph SSW 91%
6 AM 23° Mostly Clear 3% 6 mph S 93%
7 AM 23° Mostly Clear 3% 7 mph SSW 89%
8 AM 26° Mostly Clear 3% 9 mph SSW 80%
9 AM 28° Clear 3% 10 mph SSW 71%
10 AM 29° Clear 3% 10 mph SSW 62%
11 AM 31° Clear 3% 10 mph SSW 54%
12 PM 33° Clear 3% 10 mph S 46%
1 PM 36° Clear 3% 10 mph S 42%
2 PM 37° Mostly Clear 3% 10 mph S 40%
3 PM 37° Mostly Clear 3% 11 mph S 38%
4 PM 37° Mostly Clear 3% 11 mph S 39%
5 PM 37° Clear 3% 11 mph S 42%
6 PM 36° Clear 3% 11 mph SSE 45%
7 PM 34° Clear 3% 10 mph SSE 49%
8 PM 33° Clear 3% 10 mph SSE 54%
9 PM 31° Clear 3% 9 mph S 59%
10 PM 31° Clear 3% 9 mph S 62%
11 PM 30° Clear 3% 9 mph S 64%
15-Day Forecast
Today
9/14
Clear
3%
23°
37°
Tue
9/15
Clear
3%
23°
39°
Wed
9/16
Mostly Clear
7%
22°
37°
Thu
9/17
Clear
7%
22°
36°
Fri
9/18
Clear
3%
21°
37°
Sat
9/19
Rain
19%
21°
37°
Sun
9/20
Rain
28%
21°
35°
Mon
9/21
Drizzle
43%
19°
32°
Tue
9/22
Drizzle
44%
19°
32°
Wed
9/23
Drizzle
51%
21°
36°
Thu
9/24
Drizzle
60%
20°
36°
Fri
9/25
Drizzle
60%
19°
32°
Sat
9/26
Drizzle
60%
19°
32°
Sun
9/27
Drizzle
60%
20°
33°
Mon
9/28
Clear
25%
20°
33°
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
Today 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 Mon Sep 14, 04:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1461 J/kg
MLCAPE1055 J/kg
MUCAPE1834 J/kg
SBCIN-242 J/kg
MLCIN-178 J/kg
Lifted Index-4.3
Kinematics
0–6 km Shear7 kt
0–1 km Shear5 kt
Eff. Shear10 kt
0–1 km SRH-18
0–3 km SRH11
Eff. SRH11
Storm Motion120° @ 21 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index27.6
Thermo & Levels
PWAT1.63 in
0–3 km LR5.4 °C/km
700–500 LR6.2 °C/km
Total Totals46.2
LCL929 hPa
LFC718 hPa
EL177 hPa
Freezing Lvl16,086 ft