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

Rockwall County, Texas, United States

Last updated: 3:49 PM CDT  ·  Refresh
37°C
Feels like 39°
Clear
▲ 38°  /  ▼ 23°
Wind
11 mph S
Humidity
33%
Dew Point
19°
Pressure
29,35 inHg
Visibility
10 mi
UV Index
7,9
Cloud Cover
7%
Sunrise
7:07 AM
Sunset
7:34 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Rockwall County is currently clear at 37°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1605 J/kg) — isolated convective development possible. Sunrise: 7:07AM · Sunset: 7:34PM.

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
35 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
37°
3%
4 PM
37°
5%
5 PM
38°
5%
6 PM
36°
5%
7 PM
34°
5%
8 PM
33°
5%
9 PM
32°
5%
10 PM
31°
3%
11 PM
30°
3%
12 AM
29°
3%
1 AM
28°
3%
2 AM
28°
3%
3 AM
27°
3%
4 AM
27°
3%
5 AM
24°
3%
6 AM
23°
3%
7 AM
24°
3%
8 AM
26°
3%
9 AM
27°
3%
10 AM
30°
3%
11 AM
31°
3%
12 PM
32°
3%
1 PM
34°
3%
2 PM
35°
3%
7-Day Forecast
Today
38° 23°
Clear.
Mon
40° 23°
Clear.
Tue
40° 23°
Mostly Clear.
Wed
38° 22°
Clear.
Thu
36° 24°
Clear.
Fri
37° 24°
Clear.
Sat
38° 24°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 37° Clear 3% 11 mph S 33%
4 PM 37° Clear 5% 11 mph S 34%
5 PM 38° Clear 5% 11 mph S 34%
6 PM 36° Clear 5% 11 mph S 36%
7 PM 34° Clear 5% 10 mph SSE 40%
8 PM 33° Clear 5% 10 mph SSE 44%
9 PM 32° Clear 5% 11 mph SSE 48%
10 PM 31° Clear 3% 10 mph SSE 53%
11 PM 30° Clear 3% 10 mph SSE 58%
12 AM 29° Clear 3% 9 mph S 64%
1 AM 28° Clear 3% 8 mph S 67%
2 AM 28° Clear 3% 8 mph S 69%
3 AM 27° Clear 3% 8 mph S 72%
4 AM 27° Clear 3% 8 mph S 75%
5 AM 24° Clear 3% 8 mph S 78%
6 AM 23° Clear 3% 7 mph S 80%
7 AM 24° Clear 3% 8 mph S 77%
8 AM 26° Clear 3% 9 mph SSW 72%
9 AM 27° Clear 3% 10 mph SSW 67%
10 AM 30° Clear 3% 10 mph SSW 62%
11 AM 31° Clear 3% 10 mph SSW 56%
12 PM 32° Clear 3% 10 mph SSW 51%
1 PM 34° Clear 3% 10 mph SSW 49%
2 PM 35° Clear 3% 11 mph S 47%
15-Day Forecast
Today
9/13
Clear
5%
23°
38°
Mon
9/14
Clear
3%
23°
40°
Tue
9/15
Mostly Clear
3%
23°
40°
Wed
9/16
Clear
3%
22°
38°
Thu
9/17
Clear
9%
24°
36°
Fri
9/18
Clear
18%
24°
37°
Sat
9/19
Clear
19%
24°
38°
Sun
9/20
Clear
60%
22°
35°
Mon
9/21
Drizzle
60%
19°
34°
Tue
9/22
Drizzle
60%
17°
33°
Wed
9/23
Drizzle
60%
19°
33°
Thu
9/24
Clear
60%
21°
32°
Fri
9/25
Clear
25%
21°
32°
Sat
9/26
Clear
60%
21°
32°
Sun
9/27
Clear
60%
21°
32°
35
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
35 AQI 6.3 µg/m³
O3
Ground-level ozone
33 AQI 37 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 35 Good 33 35
Tue 36 Good 36 30
Wed 36 Good 36 31
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
SBCAPE1558 J/kg
MLCAPE307 J/kg
MUCAPE1558 J/kg
SBCIN-5 J/kg
MLCIN-98 J/kg
Lifted Index-4.2
Kinematics
0–6 km Shear13 kt
0–1 km Shear1 kt
Eff. Shear18 kt
0–1 km SRH3
0–3 km SRH28
Eff. SRH28
Storm Motion101° @ 14 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index31.1
Thermo & Levels
PWAT1.57 in
0–3 km LR8.7 °C/km
700–500 LR6.1 °C/km
Total Totals45.3
LCL765 hPa
LFC726 hPa
EL158 hPa
Freezing Lvl16,198 ft