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

Ellis County, Texas, United States

Last updated: 4:54 PM CDT  ·  Refresh
36°C
Feels like 38°
Clear
▲ 38°  /  ▼ 24°
Wind
10 mph S
Humidity
34%
Dew Point
19°
Pressure
29.35 inHg
Visibility
10 mi
UV Index
6.6
Cloud Cover
8%
Sunrise
7:09 AM
Sunset
7:35 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Ellis County is currently clear at 36°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1930 J/kg) — isolated convective development possible. Sunrise: 7:09AM · Sunset: 7:35PM.

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
32 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
36°
4%
5 PM
36°
4%
6 PM
36°
4%
7 PM
33°
4%
8 PM
32°
4%
9 PM
31°
4%
10 PM
30°
3%
11 PM
29°
3%
12 AM
28°
3%
1 AM
28°
3%
2 AM
28°
3%
3 AM
27°
3%
4 AM
27°
3%
5 AM
24°
3%
6 AM
24°
3%
7 AM
25°
3%
8 AM
26°
3%
9 AM
28°
3%
10 AM
28°
3%
11 AM
31°
3%
12 PM
32°
3%
1 PM
34°
3%
2 PM
34°
3%
3 PM
35°
3%
7-Day Forecast
Today
38° 24°
Clear.
Mon
38° 24°
Clear.
Tue
39° 22°
Mostly Clear.
Wed
36° 23°
Mostly Clear.
Thu
35° 24°
Partly Cloudy.
Fri
36° 23°
Clear.
Sat
36° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 36° Clear 4% 10 mph S 34%
5 PM 36° Clear 4% 10 mph S 34%
6 PM 36° Clear 4% 9 mph S 36%
7 PM 33° Clear 4% 9 mph S 41%
8 PM 32° Clear 4% 10 mph SSE 46%
9 PM 31° Clear 4% 10 mph SSE 50%
10 PM 30° Clear 3% 11 mph SSE 54%
11 PM 29° Clear 3% 11 mph S 58%
12 AM 28° Clear 3% 10 mph S 61%
1 AM 28° Clear 3% 9 mph S 66%
2 AM 28° Clear 3% 9 mph S 70%
3 AM 27° Clear 3% 8 mph S 74%
4 AM 27° Clear 3% 8 mph S 76%
5 AM 24° Clear 3% 8 mph S 76%
6 AM 24° Clear 3% 8 mph S 77%
7 AM 25° Clear 3% 8 mph SSW 74%
8 AM 26° Clear 3% 10 mph SSW 68%
9 AM 28° Clear 3% 10 mph SSW 65%
10 AM 28° Clear 3% 10 mph SSW 60%
11 AM 31° Clear 3% 10 mph SSW 55%
12 PM 32° Clear 3% 10 mph SSW 50%
1 PM 34° Clear 3% 10 mph S 48%
2 PM 34° Clear 3% 11 mph S 46%
3 PM 35° Clear 3% 12 mph S 44%
15-Day Forecast
Today
9/13
Clear
4%
24°
38°
Mon
9/14
Clear
6%
24°
38°
Tue
9/15
Mostly Clear
7%
22°
39°
Wed
9/16
Mostly Clear
3%
23°
36°
Thu
9/17
Partly Cloudy
8%
24°
35°
Fri
9/18
Clear
3%
23°
36°
Sat
9/19
Clear
17%
23°
36°
Sun
9/20
Clear
43%
23°
34°
Mon
9/21
Drizzle
68%
23°
33°
Tue
9/22
Drizzle
68%
19°
33°
Wed
9/23
Drizzle
67%
21°
32°
Thu
9/24
Drizzle
60%
22°
32°
Fri
9/25
Clear
60%
21°
32°
Sat
9/26
Clear
25%
21°
32°
Sun
9/27
Drizzle
60%
21°
32°
32
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
32 AQI 5.9 µg/m³
O3
Ground-level ozone
Dominant
32 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 32 Good 32 32
Tue 33 Good 33 26
Wed 34 Good 34 29
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 Sun Sep 13, 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
SBCAPE1459 J/kg
MLCAPE519 J/kg
MUCAPE1782 J/kg
SBCIN-13 J/kg
MLCIN-148 J/kg
Lifted Index-3.1
Kinematics
0–6 km Shear12 kt
0–1 km Shear9 kt
Eff. Shear15 kt
0–1 km SRH-37
0–3 km SRH10
Eff. SRH10
Storm Motion120° @ 22 kt
0–1 km EHI-0.3
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index33.6
Thermo & Levels
PWAT1.76 in
0–3 km LR8.5 °C/km
700–500 LR5.5 °C/km
Total Totals48.4
LCL778 hPa
LFC740 hPa
EL168 hPa
Freezing Lvl16,598 ft