Heat Advisory — Montague, TX, Cooke, TX, Grayson, TX, Fannin, TX, Lamar, TX, Jack, TX, Wise, TX, Denton, TX, Collin, TX, Hunt, TX, Delta, TX, Hopkins, TX, Palo Pinto, TX, Parker, TX, Tarrant, TX, Dallas, TX, Rockwall, TX, Kaufman, TX, Johnson, TX, Ellis, TX 8:00 PM

Collin County, Texas, United States

Last updated: 5:10 AM CDT  ·  Refresh
27°C
Feels like 28°
Clear
▲ 38°  /  ▼ 26°
Wind
10 mph S
Humidity
71%
Dew Point
21°
Pressure
29.40 inHg
Visibility
8 mi
UV Index
0.0
Cloud Cover
4%
Sunrise
6:46 AM
Sunset
8:16 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Collin County is currently clear at 27°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1935 J/kg) — isolated convective development possible. Sunrise: 6:46AM · Sunset: 8:16PM.

Alerts

Heat Advisory
Montague, TX, Cooke, TX, Grayson, TX, Fannin, TX, Lamar, TX, Jack, TX, Wise, TX, Denton, TX, Collin, TX, Hunt, TX, Delta, TX, Hopkins, TX, Palo Pinto, TX, Parker, TX, Tarrant, TX, Dallas, TX, Rockwall, TX, Kaufman, TX, Johnson, TX, Ellis, TX
Expires 8:00 PM
42 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
3%
6 AM
24°
3%
7 AM
24°
3%
8 AM
26°
3%
9 AM
27°
3%
10 AM
29°
3%
11 AM
31°
3%
12 PM
32°
3%
1 PM
34°
3%
2 PM
36°
3%
3 PM
37°
3%
4 PM
37°
3%
5 PM
37°
3%
6 PM
38°
3%
7 PM
37°
3%
8 PM
36°
3%
9 PM
34°
3%
10 PM
33°
3%
11 PM
32°
3%
12 AM
30°
3%
1 AM
29°
3%
2 AM
29°
3%
3 AM
29°
3%
4 AM
28°
3%
7-Day Forecast
Today
38° 26°
Mostly Clear.
Wed
40° 26°
Clear.
Thu
39° 24°
Clear.
Fri
39° 24°
Clear.
Sat
41° 26°
Partly Cloudy.
Sun
41° 26°
Clear.
Mon
41° 26°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 27° Clear 3% 10 mph S 71%
6 AM 24° Clear 3% 10 mph S 70%
7 AM 24° Clear 3% 9 mph S 71%
8 AM 26° Clear 3% 11 mph SSW 67%
9 AM 27° Clear 3% 12 mph SSW 63%
10 AM 29° Clear 3% 13 mph SSW 58%
11 AM 31° Clear 3% 12 mph SSW 53%
12 PM 32° Clear 3% 12 mph SSW 48%
1 PM 34° Mostly Clear 3% 12 mph SSW 43%
2 PM 36° Mostly Clear 3% 12 mph SSW 39%
3 PM 37° Mostly Clear 3% 12 mph SSW 36%
4 PM 37° Mostly Clear 3% 12 mph SSW 34%
5 PM 37° Mostly Clear 3% 13 mph S 33%
6 PM 38° Mostly Clear 3% 14 mph S 34%
7 PM 37° Mostly Clear 3% 14 mph S 35%
8 PM 36° Clear 3% 13 mph S 39%
9 PM 34° Clear 3% 13 mph S 43%
10 PM 33° Clear 3% 13 mph S 46%
11 PM 32° Clear 3% 13 mph S 50%
12 AM 30° Clear 3% 14 mph S 53%
1 AM 29° Clear 3% 14 mph S 56%
2 AM 29° Clear 3% 13 mph S 58%
3 AM 29° Clear 3% 13 mph S 61%
4 AM 28° Clear 3% 12 mph SSW 63%
15-Day Forecast
Today
8/11
Mostly Clear
3%
26°
38°
Wed
8/12
Clear
3%
26°
40°
Thu
8/13
Clear
3%
24°
39°
Fri
8/14
Clear
3%
24°
39°
Sat
8/15
Partly Cloudy
3%
26°
41°
Sun
8/16
Clear
7%
26°
41°
Mon
8/17
Clear
3%
26°
41°
Tue
8/18
Clear
34%
27°
41°
Wed
8/19
Clear
15%
28°
41°
Thu
8/20
Mostly Clear
11%
27°
39°
Fri
8/21
Drizzle
60%
28°
41°
Sat
8/22
Clear
60%
27°
40°
Sun
8/23
Clear
60%
27°
39°
Mon
8/24
Drizzle
60%
27°
39°
Tue
8/25
Drizzle
60%
27°
38°
42
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
27 AQI 4.9 µg/m³
O3
Ground-level ozone
Dominant
42 AQI 45 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 42 Good 42 27
Wed 53 Moderate 42 53
Thu 39 Good 39 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 Tue Aug 11, 08:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE467 J/kg
MLCAPE141 J/kg
MUCAPE467 J/kg
SBCIN-308 J/kg
MLCIN0 J/kg
Lifted Index-1.5
Kinematics
0–6 km Shear5 kt
0–1 km Shear10 kt
Eff. Shear9 kt
0–1 km SRH21
0–3 km SRH32
Eff. SRH11
Storm Motion23° @ 7 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index27.5
Thermo & Levels
PWAT1.55 in
0–3 km LR5.0 °C/km
700–500 LR6.3 °C/km
Total Totals46.5
LCL915 hPa
LFC623 hPa
EL234 hPa
Freezing Lvl15,912 ft