Extreme Heat Warning — 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, Stephens, TX, Palo Pinto, TX, Parker, TX, Tarrant, TX, Dallas, TX, Rockwall, TX, Kaufman, TX, Van Zandt, TX, Rains, TX, Eastland, TX, Erath, TX, Hood, TX, Somervell, TX, Johnson, TX, Ellis, TX, Henderson, TX, Comanche, TX, Mills, TX, Hamilton, TX, Bosque, TX, Hill, TX, Navarro, TX, Freestone, TX, Anderson, TX, Lampasas, TX, Coryell, TX, Bell, TX, McLennan, TX, Falls, TX, Limestone, TX, Leon, TX, Milam, TX, Robertson, TX 9:00 PM

Grayson County, Texas, United States

Last updated: 8:32 PM CDT  ·  Refresh
37°C
Feels like 37°
Mostly Clear
▲ 41°  /  ▼ 26°
Wind
7 mph SSE
Humidity
26%
Dew Point
16°
Pressure
29,04 inHg
Visibility
8 mi
UV Index
0,0
Cloud Cover
15%
Sunrise
6:54 AM
Sunset
8:03 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Grayson County is currently mostly clear at 37°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 615 J/kg) — isolated convective development possible. Sunrise: 6:54AM · Sunset: 8:03PM.

Alerts

Extreme Heat Warning
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, Stephens, TX, Palo Pinto, TX, Parker, TX, Tarrant, TX, Dallas, TX, Rockwall, TX, Kaufman, TX, Van Zandt, TX, Rains, TX, Eastland, TX, Erath, TX, Hood, TX, Somervell, TX, Johnson, TX, Ellis, TX, Henderson, TX, Comanche, TX, Mills, TX, Hamilton, TX, Bosque, TX, Hill, TX, Navarro, TX, Freestone, TX, Anderson, TX, Lampasas, TX, Coryell, TX, Bell, TX, McLennan, TX, Falls, TX, Limestone, TX, Leon, TX, Milam, TX, Robertson, TX
Expires 9:00 PM
80 AQI · Moderate Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
37°
11%
9 PM
34°
3%
10 PM
33°
4%
11 PM
33°
4%
12 AM
32°
4%
1 AM
31°
4%
2 AM
31°
4%
3 AM
30°
7%
4 AM
29°
7%
5 AM
27°
7%
6 AM
27°
7%
7 AM
28°
8%
8 AM
29°
8%
9 AM
28°
8%
10 AM
29°
16%
11 AM
31°
16%
12 PM
33°
13%
1 PM
36°
13%
2 PM
37°
14%
3 PM
39°
17%
4 PM
38°
8%
5 PM
40°
9%
6 PM
39°
9%
7 PM
39°
9%
7-Day Forecast
Tonight
41° 26°
Mostly Clear.
Mon
41° 27°
Partly Cloudy.
Tue
42° 27°
Partly Cloudy.
Wed
37° 25°
Partly Cloudy with a 28% chance of rain.
Thu
37° 23°
Mostly Clear with a 21% chance of rain.
Fri
38° 23°
Clear.
Sat
38° 25°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 37° Mostly Clear 11% 7 mph SSE 26%
9 PM 34° Partly Cloudy 3% 9 mph SSE 28%
10 PM 33° Partly Cloudy 4% 10 mph SSE 31%
11 PM 33° Mostly Clear 4% 10 mph S 34%
12 AM 32° Mostly Clear 4% 10 mph S 36%
1 AM 31° Mostly Clear 4% 10 mph S 38%
2 AM 31° Mostly Clear 4% 10 mph S 40%
3 AM 30° Partly Cloudy 7% 10 mph SSW 41%
4 AM 29° Partly Cloudy 7% 10 mph SSW 42%
5 AM 27° Partly Cloudy 7% 10 mph SSW 43%
6 AM 27° Partly Cloudy 7% 11 mph SSW 43%
7 AM 28° Mostly Cloudy 8% 11 mph SSW 42%
8 AM 29° Mostly Cloudy 8% 12 mph SW 39%
9 AM 28° Mostly Cloudy 8% 13 mph SW 35%
10 AM 29° Partly Cloudy 16% 14 mph SW 31%
11 AM 31° Partly Cloudy 16% 14 mph SW 28%
12 PM 33° Partly Cloudy 13% 14 mph SW 25%
1 PM 36° Partly Cloudy 13% 14 mph SW 23%
2 PM 37° Partly Cloudy 14% 13 mph SW 22%
3 PM 39° Partly Cloudy 17% 14 mph SSW 21%
4 PM 38° Partly Cloudy 8% 14 mph SSW 21%
5 PM 40° Partly Cloudy 9% 14 mph SSW 22%
6 PM 39° Mostly Clear 9% 14 mph SSW 23%
7 PM 39° Mostly Clear 9% 14 mph S 25%
15-Day Forecast
Today
8/23
Mostly Clear
11%
26°
41°
Mon
8/24
Partly Cloudy
16%
27°
41°
Tue
8/25
Partly Cloudy
17%
27°
42°
Wed
8/26
Partly Cloudy
28%
25°
37°
Thu
8/27
Mostly Clear
21%
23°
37°
Fri
8/28
Clear
17%
23°
38°
Sat
8/29
Clear
15%
25°
38°
Sun
8/30
Clear
19%
26°
38°
Mon
8/31
Clear
8%
25°
39°
Tue
9/1
Clear
15%
25°
39°
Wed
9/2
Clear
25%
26°
42°
Thu
9/3
Clear
60%
26°
42°
Fri
9/4
Drizzle
60%
26°
36°
Sat
9/5
Drizzle
60%
25°
35°
Sun
9/6
Drizzle
60%
25°
35°
80
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 11.3 µg/m³
O3
Ground-level ozone
Dominant
80 AQI 64 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 80 Moderate 80 55
Tue 57 Moderate 50 57
Wed 54 Moderate 54 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 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid dim. août 23, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE317 J/kg
MLCAPE301 J/kg
MUCAPE376 J/kg
SBCIN-326 J/kg
MLCIN-137 J/kg
Lifted Index-0.6
Kinematics
0–6 km Shear26 kt
0–1 km Shear6 kt
Eff. Shear30 kt
0–1 km SRH11
0–3 km SRH59
Eff. SRH70
Storm Motion46° @ 13 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.4
K-Index35.7
Thermo & Levels
PWAT1.46 in
0–3 km LR8.2 °C/km
700–500 LR6.3 °C/km
Total Totals47.8
LCL722 hPa
LFC612 hPa
EL212 hPa
Freezing Lvl16,125 ft