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

Hill County, Texas, United States

Last updated: 3:50 PM CDT  ·  Refresh
36°C
Feels like 38°
Clear
▲ 37°  /  ▼ 23°
Wind
11 mph S
Humidity
40%
Dew Point
20°
Pressure
29.24 inHg
Visibility
10 mi
UV Index
7.9
Cloud Cover
6%
Sunrise
7:10 AM
Sunset
7:36 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Hill County is currently clear at 35°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1891 J/kg) — isolated convective development possible. Sunrise: 7:10AM · Sunset: 7:36PM.

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
38 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
36°
4%
4 PM
35°
5%
5 PM
35°
5%
6 PM
33°
5%
7 PM
32°
5%
8 PM
30°
5%
9 PM
29°
5%
10 PM
29°
5%
11 PM
28°
3%
12 AM
27°
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
24°
3%
9 AM
26°
3%
10 AM
28°
3%
11 AM
29°
3%
12 PM
30°
3%
1 PM
32°
3%
2 PM
32°
3%
7-Day Forecast
Today
37° 23°
Clear.
Mon
38° 23°
Clear.
Tue
38° 22°
Mostly Clear.
Wed
36° 21°
Clear.
Thu
35° 23°
Clear.
Fri
36° 23°
Clear.
Sat
36° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 36° Clear 4% 11 mph S 40%
4 PM 35° Clear 5% 11 mph SSE 41%
5 PM 35° Clear 5% 11 mph SSE 43%
6 PM 33° Clear 5% 10 mph SSE 44%
7 PM 32° Clear 5% 10 mph SSE 47%
8 PM 30° Clear 5% 10 mph SSE 49%
9 PM 29° Clear 5% 11 mph SSE 52%
10 PM 29° Clear 5% 11 mph SSE 59%
11 PM 28° Clear 3% 11 mph S 66%
12 AM 27° Clear 3% 10 mph S 72%
1 AM 27° Clear 3% 9 mph S 74%
2 AM 26° Clear 3% 9 mph S 77%
3 AM 26° Clear 3% 8 mph S 80%
4 AM 26° Clear 3% 8 mph S 81%
5 AM 23° Mostly Clear 3% 8 mph S 82%
6 AM 23° Mostly Clear 3% 8 mph S 83%
7 AM 23° Mostly Clear 3% 8 mph S 79%
8 AM 24° Mostly Clear 3% 9 mph SSW 73%
9 AM 26° Clear 3% 9 mph SSW 68%
10 AM 28° Clear 3% 9 mph SSW 64%
11 AM 29° Clear 3% 10 mph SSW 59%
12 PM 30° Clear 3% 10 mph S 55%
1 PM 32° Clear 3% 10 mph S 53%
2 PM 32° Clear 3% 10 mph S 51%
15-Day Forecast
Today
9/13
Clear
5%
23°
37°
Mon
9/14
Clear
7%
23°
38°
Tue
9/15
Mostly Clear
8%
22°
38°
Wed
9/16
Clear
3%
21°
36°
Thu
9/17
Clear
3%
23°
35°
Fri
9/18
Clear
3%
23°
36°
Sat
9/19
Clear
19%
23°
36°
Sun
9/20
Clear
60%
23°
34°
Mon
9/21
Drizzle
90%
20°
33°
Tue
9/22
Drizzle
60%
18°
32°
Wed
9/23
Drizzle
60%
20°
32°
Thu
9/24
Drizzle
60%
22°
31°
Fri
9/25
Clear
60%
22°
31°
Sat
9/26
Clear
25%
21°
32°
Sun
9/27
Drizzle
60%
21°
31°
38
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
38 AQI 6.9 µg/m³
O3
Ground-level ozone
32 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 38 Good 32 38
Tue 33 Good 33 31
Wed 35 Good 35 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
SBCAPE1899 J/kg
MLCAPE1359 J/kg
MUCAPE1899 J/kg
SBCIN-11 J/kg
MLCIN-46 J/kg
Lifted Index-3.8
Kinematics
0–6 km Shear10 kt
0–1 km Shear2 kt
Eff. Shear10 kt
0–1 km SRH-5
0–3 km SRH17
Eff. SRH17
Storm Motion128° @ 18 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index31.5
Thermo & Levels
PWAT1.64 in
0–3 km LR8.3 °C/km
700–500 LR5.6 °C/km
Total Totals45.4
LCL794 hPa
LFC755 hPa
EL153 hPa
Freezing Lvl16,325 ft