Heat Advisory — Montague, TX, Cooke, TX, Grayson, TX, Fannin, TX, Lamar, TX, Young, 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, Van Zandt, TX, Rains, TX, Hood, TX, Somervell, TX, Johnson, TX, Ellis, TX, Henderson, TX, Navarro, TX, Freestone, TX, Anderson, TX, Leon, TX 8:00 PM

Grayson County, Texas, United States

Last updated: 12:19 AM CDT  ·  Refresh
29°C
Feels like 29°
Clear
▲ 39°  /  ▼ 25°
Wind
8 mph S
Humidity
48%
Dew Point
18°
Pressure
29.10 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
6:35 AM
Sunset
8:30 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Grayson County is currently clear at 29°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:35AM · Sunset: 8:30PM.

Alerts

Heat Advisory
Montague, TX, Cooke, TX, Grayson, TX, Fannin, TX, Lamar, TX, Young, 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, Van Zandt, TX, Rains, TX, Hood, TX, Somervell, TX, Johnson, TX, Ellis, TX, Henderson, TX, Navarro, TX, Freestone, TX, Anderson, TX, Leon, TX
Expires 8:00 PM
64 AQI · Moderate Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
29°
5%
1 AM
29°
5%
2 AM
28°
5%
3 AM
27°
3%
4 AM
27°
3%
5 AM
26°
3%
6 AM
23°
3%
7 AM
24°
3%
8 AM
27°
3%
9 AM
29°
3%
10 AM
31°
3%
11 AM
32°
3%
12 PM
34°
3%
1 PM
35°
3%
2 PM
37°
3%
3 PM
37°
3%
4 PM
38°
3%
5 PM
37°
3%
6 PM
38°
3%
7 PM
37°
3%
8 PM
36°
3%
9 PM
34°
3%
10 PM
32°
3%
11 PM
31°
3%
7-Day Forecast
Today
39° 25°
Mostly Clear.
Tue
40° 25°
Partly Cloudy.
Wed
39° 26°
Mostly Clear.
Thu
40° 27°
Clear.
Fri
42° 27°
Clear.
Sat
39° 24°
Clear.
Sun
37° 21°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 29° Clear 5% 8 mph S 48%
1 AM 29° Clear 5% 9 mph S 47%
2 AM 28° Clear 5% 9 mph S 51%
3 AM 27° Clear 3% 9 mph SSW 55%
4 AM 27° Clear 3% 9 mph SSW 58%
5 AM 26° Clear 3% 9 mph SSW 62%
6 AM 23° Clear 3% 8 mph SSW 66%
7 AM 24° Clear 3% 9 mph SSW 66%
8 AM 27° Clear 3% 11 mph SSW 59%
9 AM 29° Clear 3% 13 mph SW 53%
10 AM 31° Clear 3% 13 mph SW 47%
11 AM 32° Partly Cloudy 3% 12 mph SW 42%
12 PM 34° Partly Cloudy 3% 11 mph SSW 36%
1 PM 35° Partly Cloudy 3% 11 mph SSW 32%
2 PM 37° Mostly Clear 3% 11 mph SSW 31%
3 PM 37° Mostly Clear 3% 12 mph SSW 29%
4 PM 38° Clear 3% 12 mph SSW 28%
5 PM 37° Mostly Clear 3% 12 mph SSW 28%
6 PM 38° Mostly Clear 3% 11 mph SSW 29%
7 PM 37° Mostly Clear 3% 11 mph SSW 31%
8 PM 36° Mostly Clear 3% 10 mph S 34%
9 PM 34° Clear 3% 10 mph S 38%
10 PM 32° Clear 3% 10 mph S 41%
11 PM 31° Clear 3% 10 mph S 42%
15-Day Forecast
Today
7/27
Mostly Clear
5%
25°
39°
Tue
7/28
Partly Cloudy
3%
25°
40°
Wed
7/29
Mostly Clear
7%
26°
39°
Thu
7/30
Clear
14%
27°
40°
Fri
7/31
Clear
16%
27°
42°
Sat
8/1
Clear
17%
24°
39°
Sun
8/2
Clear
8%
21°
37°
Mon
8/3
Clear
18%
23°
38°
Tue
8/4
Clear
19%
24°
39°
Wed
8/5
Clear
19%
27°
39°
Thu
8/6
Drizzle
60%
27°
39°
Fri
8/7
Drizzle
60%
26°
38°
Sat
8/8
Drizzle
60%
26°
38°
Sun
8/9
Drizzle
60%
26°
38°
Mon
8/10
Clear
60%
27°
39°
64
Moderate
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
55 AQI 11.6 µg/m³
O3
Ground-level ozone
Dominant
64 AQI 60 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 64 Moderate 64 55
Tue 54 Moderate 54 43
Wed 58 Moderate 58 52
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 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Mon Jul 27, 04:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE5 J/kg
MUCAPE202 J/kg
SBCIN-4377 J/kg
MLCIN0 J/kg
Lifted Index4.2
Kinematics
0–6 km Shear19 kt
0–1 km Shear11 kt
Eff. Shear—
0–1 km SRH81
0–3 km SRH43
Eff. SRH—
Storm Motion280° @ 15 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index22.3
Thermo & Levels
PWAT1.28 in
0–3 km LR5.3 °C/km
700–500 LR5.1 °C/km
Total Totals33.0
LCL845 hPa
LFC—
EL—
Freezing Lvl18,248 ft