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: 3:46 PM CDT  ·  Refresh
37°C
Feels like 39°
Mostly Clear
▲ 38°  /  ▼ 23°
Wind
11 mph S
Humidity
36%
Dew Point
20°
Pressure
29.36 inHg
Visibility
10 mi
UV Index
7.9
Cloud Cover
14%
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 mostly clear at 36°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1651 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
37°
3%
4 PM
37°
5%
5 PM
36°
5%
6 PM
35°
5%
7 PM
33°
5%
8 PM
31°
5%
9 PM
31°
5%
10 PM
29°
3%
11 PM
29°
3%
12 AM
28°
3%
1 AM
28°
3%
2 AM
27°
3%
3 AM
26°
3%
4 AM
26°
3%
5 AM
23°
3%
6 AM
23°
3%
7 AM
23°
3%
8 AM
25°
3%
9 AM
27°
3%
10 AM
29°
3%
11 AM
30°
3%
12 PM
31°
3%
1 PM
33°
3%
2 PM
33°
3%
7-Day Forecast
Today
38° 23°
Clear.
Mon
38° 23°
Clear.
Tue
38° 22°
Mostly Clear.
Wed
36° 22°
Clear.
Thu
35° 24°
Clear.
Fri
36° 24°
Clear.
Sat
36° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 37° Mostly Clear 3% 11 mph S 36%
4 PM 37° Mostly Clear 5% 11 mph S 35%
5 PM 36° Clear 5% 10 mph S 34%
6 PM 35° Clear 5% 9 mph S 36%
7 PM 33° Clear 5% 9 mph S 40%
8 PM 31° Clear 5% 9 mph SSE 46%
9 PM 31° Clear 5% 10 mph SSE 51%
10 PM 29° Clear 3% 11 mph SSE 55%
11 PM 29° Clear 3% 11 mph S 60%
12 AM 28° Clear 3% 10 mph S 63%
1 AM 28° Clear 3% 10 mph S 68%
2 AM 27° Clear 3% 8 mph S 72%
3 AM 26° Clear 3% 7 mph S 76%
4 AM 26° Clear 3% 7 mph S 79%
5 AM 23° Mostly Clear 3% 7 mph S 82%
6 AM 23° Mostly Clear 3% 7 mph S 84%
7 AM 23° Mostly Clear 3% 7 mph S 80%
8 AM 25° Mostly Clear 3% 8 mph SSW 72%
9 AM 27° Clear 3% 9 mph SSW 66%
10 AM 29° Clear 3% 10 mph SSW 61%
11 AM 30° Clear 3% 10 mph SSW 56%
12 PM 31° Clear 3% 10 mph SSW 52%
1 PM 33° Clear 3% 10 mph S 49%
2 PM 33° Clear 3% 11 mph S 48%
15-Day Forecast
Today
9/13
Clear
5%
23°
38°
Mon
9/14
Clear
7%
23°
38°
Tue
9/15
Mostly Clear
8%
22°
38°
Wed
9/16
Clear
8%
22°
36°
Thu
9/17
Clear
9%
24°
35°
Fri
9/18
Clear
3%
24°
36°
Sat
9/19
Clear
19%
23°
36°
Sun
9/20
Clear
60%
23°
34°
Mon
9/21
Drizzle
60%
20°
33°
Tue
9/22
Drizzle
60%
18°
33°
Wed
9/23
Drizzle
60%
20°
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, 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
SBCAPE2234 J/kg
MLCAPE1072 J/kg
MUCAPE2234 J/kg
SBCIN0 J/kg
MLCIN-38 J/kg
Lifted Index-4.6
Kinematics
0–6 km Shear11 kt
0–1 km Shear2 kt
Eff. Shear13 kt
0–1 km SRH-3
0–3 km SRH15
Eff. SRH15
Storm Motion129° @ 17 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index29.7
Thermo & Levels
PWAT1.60 in
0–3 km LR8.4 °C/km
700–500 LR5.8 °C/km
Total Totals45.9
LCL789 hPa
LFC994 hPa
EL147 hPa
Freezing Lvl16,457 ft