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

Stephens County, Texas, United States

Last updated: 3:46 PM CDT  ·  Refresh
37°C
Feels like 39°
Mostly Clear
▲ 38°  /  ▼ 22°
Wind
11 mph S
Humidity
35%
Dew Point
19°
Pressure
28.50 inHg
Visibility
7 mi
UV Index
8.0
Cloud Cover
18%
Sunrise
7:17 AM
Sunset
7:43 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Stephens County is currently mostly clear at 37°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1683 J/kg) — isolated convective development possible. Sunrise: 7:17AM · Sunset: 7:43PM.

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
38°
3%
5 PM
38°
3%
6 PM
38°
3%
7 PM
36°
3%
8 PM
34°
3%
9 PM
32°
3%
10 PM
31°
3%
11 PM
30°
3%
12 AM
29°
3%
1 AM
28°
3%
2 AM
27°
3%
3 AM
27°
3%
4 AM
27°
3%
5 AM
23°
3%
6 AM
22°
3%
7 AM
23°
3%
8 AM
24°
3%
9 AM
27°
3%
10 AM
29°
3%
11 AM
31°
3%
12 PM
32°
3%
1 PM
34°
3%
2 PM
34°
3%
7-Day Forecast
Today
38° 22°
Clear.
Mon
40° 22°
Mostly Clear.
Tue
39° 21°
Mostly Clear.
Wed
38° 22°
Clear.
Thu
36° 22°
Clear.
Fri
37° 22°
Drizzle, 50% chance.
Sat
36° 22°
Clear with a 35% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 37° Mostly Clear 3% 11 mph S 35%
4 PM 38° Mostly Clear 3% 12 mph SSE 34%
5 PM 38° Mostly Clear 3% 13 mph S 34%
6 PM 38° Clear 3% 13 mph S 35%
7 PM 36° Clear 3% 12 mph SSE 37%
8 PM 34° Clear 3% 11 mph SSE 40%
9 PM 32° Clear 3% 11 mph SSE 43%
10 PM 31° Clear 3% 10 mph SSE 48%
11 PM 30° Clear 3% 11 mph SSE 54%
12 AM 29° Clear 3% 11 mph S 60%
1 AM 28° Clear 3% 12 mph S 64%
2 AM 27° Clear 3% 12 mph S 69%
3 AM 27° Clear 3% 12 mph S 72%
4 AM 27° Clear 3% 12 mph S 75%
5 AM 23° Clear 3% 12 mph S 78%
6 AM 22° Clear 3% 11 mph S 81%
7 AM 23° Clear 3% 11 mph SSW 77%
8 AM 24° Clear 3% 12 mph SSW 69%
9 AM 27° Clear 3% 13 mph SSW 62%
10 AM 29° Clear 3% 13 mph SSW 56%
11 AM 31° Clear 3% 13 mph S 50%
12 PM 32° Clear 3% 13 mph S 45%
1 PM 34° Clear 3% 13 mph S 42%
2 PM 34° Mostly Clear 3% 14 mph S 40%
15-Day Forecast
Today
9/13
Clear
3%
22°
38°
Mon
9/14
Mostly Clear
3%
22°
40°
Tue
9/15
Mostly Clear
3%
21°
39°
Wed
9/16
Clear
8%
22°
38°
Thu
9/17
Clear
9%
22°
36°
Fri
9/18
Drizzle
50%
22°
37°
Sat
9/19
Clear
35%
22°
36°
Sun
9/20
Drizzle
60%
21°
34°
Mon
9/21
Drizzle
60%
17°
33°
Tue
9/22
Drizzle
60%
17°
33°
Wed
9/23
Drizzle
60%
19°
33°
Thu
9/24
Drizzle
60%
21°
33°
Fri
9/25
Drizzle
60%
21°
32°
Sat
9/26
Clear
60%
20°
32°
Sun
9/27
Drizzle
60%
20°
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
29 AQI 5.4 µg/m³
O3
Ground-level ozone
Dominant
32 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 32 Good 32 29
Tue 31 Good 31 23
Wed 33 Good 33 33
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
SBCAPE2159 J/kg
MLCAPE1274 J/kg
MUCAPE2159 J/kg
SBCIN0 J/kg
MLCIN-13 J/kg
Lifted Index-5.1
Kinematics
0–6 km Shear7 kt
0–1 km Shear1 kt
Eff. Shear5 kt
0–1 km SRH0
0–3 km SRH3
Eff. SRH3
Storm Motion133° @ 19 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index39.1
Thermo & Levels
PWAT1.55 in
0–3 km LR9.0 °C/km
700–500 LR6.0 °C/km
Total Totals50.6
LCL745 hPa
LFC965 hPa
EL152 hPa
Freezing Lvl15,512 ft