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 p. m.

Limestone County, Texas, United States

Last updated: 3:47 p. m. CDT  ·  Refresh
37°C
Feels like 39°
Clear
▲ 37°  /  ▼ 23°
Wind
9 mph S
Humidity
36%
Dew Point
19°
Pressure
29,41 inHg
Visibility
10 mi
UV Index
8,0
Cloud Cover
10%
Sunrise
7:08 a. m.
Sunset
7:34 p. m.
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Limestone County is currently clear at 36°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2001 J/kg) — isolated convective development possible. Sunrise: 7:08A. M. · Sunset: 7:34P. M..

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 p. m.
35 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
37°
4%
4 p. m.
37°
5%
5 p. m.
36°
5%
6 p. m.
34°
5%
7 p. m.
33°
5%
8 p. m.
31°
5%
9 p. m.
29°
5%
10 p. m.
29°
5%
11 p. m.
28°
3%
12 a. m.
27°
3%
1 a. m.
27°
3%
2 a. m.
26°
3%
3 a. m.
25°
3%
4 a. m.
25°
3%
5 a. m.
23°
3%
6 a. m.
23°
3%
7 a. m.
23°
9%
8 a. m.
25°
9%
9 a. m.
26°
20%
10 a. m.
28°
20%
11 a. m.
29°
21%
12 p. m.
31°
21%
1 p. m.
33°
21%
2 p. m.
33°
22%
7-Day Forecast
Today
37° 23°
Mostly Clear.
Mon
38° 23°
Partly Cloudy with a 25% chance of rain.
Tue
38° 22°
Clear.
Wed
35° 21°
Clear.
Thu
36° 23°
Clear.
Fri
36° 22°
Clear.
Sat
36° 22°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 37° Clear 4% 9 mph S 36%
4 p. m. 37° Mostly Clear 5% 10 mph S 37%
5 p. m. 36° Partly Cloudy 5% 11 mph S 40%
6 p. m. 34° Mostly Clear 5% 12 mph S 44%
7 p. m. 33° Mostly Clear 5% 10 mph SSE 46%
8 p. m. 31° Clear 5% 10 mph SSE 51%
9 p. m. 29° Clear 5% 10 mph SSE 56%
10 p. m. 29° Clear 5% 10 mph SSE 61%
11 p. m. 28° Clear 3% 10 mph S 66%
12 a. m. 27° Clear 3% 9 mph S 72%
1 a. m. 27° Clear 3% 8 mph S 76%
2 a. m. 26° Clear 3% 8 mph S 81%
3 a. m. 25° Clear 3% 6 mph S 85%
4 a. m. 25° Mostly Clear 3% 6 mph S 86%
5 a. m. 23° Mostly Clear 3% 5 mph S 87%
6 a. m. 23° Partly Cloudy 3% 6 mph S 87%
7 a. m. 23° Partly Cloudy 9% 6 mph S 83%
8 a. m. 25° Partly Cloudy 9% 7 mph S 76%
9 a. m. 26° Partly Cloudy 20% 7 mph SSW 71%
10 a. m. 28° Mostly Clear 20% 8 mph S 66%
11 a. m. 29° Mostly Clear 21% 8 mph S 61%
12 p. m. 31° Mostly Clear 21% 9 mph S 55%
1 p. m. 33° Mostly Clear 21% 9 mph S 53%
2 p. m. 33° Mostly Clear 22% 9 mph S 52%
15-Day Forecast
Today
9/13
Mostly Clear
5%
23°
37°
Mon
9/14
Partly Cloudy
25%
23°
38°
Tue
9/15
Clear
3%
22°
38°
Wed
9/16
Clear
3%
21°
35°
Thu
9/17
Clear
9%
23°
36°
Fri
9/18
Clear
3%
22°
36°
Sat
9/19
Clear
19%
22°
36°
Sun
9/20
Clear
60%
23°
35°
Mon
9/21
Drizzle
60%
21°
34°
Tue
9/22
Drizzle
60%
18°
33°
Wed
9/23
Drizzle
60%
20°
33°
Thu
9/24
Drizzle
60%
21°
32°
Fri
9/25
Clear
60%
21°
32°
Sat
9/26
Clear
60%
20°
32°
Sun
9/27
Drizzle
60%
20°
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 6.4 µg/m³
O3
Ground-level ozone
31 AQI 34 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 35 Good 31 35
Tue 33 Good 33 28
Wed 35 Good 35 32
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 dom. 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
SBCAPE1677 J/kg
MLCAPE1532 J/kg
MUCAPE1599 J/kg
SBCIN0 J/kg
MLCIN-12 J/kg
Lifted Index-2.6
Kinematics
0–6 km Shear10 kt
0–1 km Shear2 kt
Eff. Shear13 kt
0–1 km SRH-4
0–3 km SRH9
Eff. SRH9
Storm Motion138° @ 18 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.6
Thermo & Levels
PWAT1.83 in
0–3 km LR8.7 °C/km
700–500 LR5.2 °C/km
Total Totals46.4
LCL778 hPa
LFC996 hPa
EL171 hPa
Freezing Lvl16,572 ft