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

Somervell County, Texas, United States

Last updated: 3:49 PM CDT  ·  Refresh
98°F
Feels like 103°
Mostly Clear
▲ 99°  /  ▼ 72°
Wind
11 mph S
Humidity
36%
Dew Point
68°
Pressure
29.09 inHg
Visibility
10 mi
UV Index
8.0
Cloud Cover
13%
Sunrise
7:13 AM
Sunset
7:39 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Somervell County is currently mostly clear at 98°F. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1906 J/kg) — isolated convective development possible. Sunrise: 7:13AM · Sunset: 7:39PM.

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
32 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
98°
3%
4 PM
99°
3%
5 PM
99°
3%
6 PM
97°
3%
7 PM
94°
3%
8 PM
90°
3%
9 PM
88°
3%
10 PM
86°
3%
11 PM
85°
3%
12 AM
83°
3%
1 AM
82°
3%
2 AM
81°
3%
3 AM
80°
3%
4 AM
79°
3%
5 AM
73°
3%
6 AM
72°
3%
7 AM
74°
3%
8 AM
76°
3%
9 AM
81°
3%
10 AM
86°
3%
11 AM
87°
3%
12 PM
89°
3%
1 PM
93°
3%
2 PM
94°
3%
7-Day Forecast
Today
99° 72°
Clear.
Mon
102° 72°
Clear.
Tue
102° 69°
Clear.
Wed
98° 68°
Clear with a 38% chance of rain.
Thu
97° 73°
Drizzle, 43% chance.
Fri
98° 72°
Clear.
Sat
97° 71°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 98° Mostly Clear 3% 11 mph S 36%
4 PM 99° Mostly Clear 3% 11 mph S 36%
5 PM 99° Clear 3% 12 mph S 35%
6 PM 97° Clear 3% 12 mph SSE 35%
7 PM 94° Clear 3% 12 mph SSE 39%
8 PM 90° Clear 3% 12 mph SSE 44%
9 PM 88° Clear 3% 12 mph SSE 50%
10 PM 86° Clear 3% 11 mph S 55%
11 PM 85° Clear 3% 12 mph S 62%
12 AM 83° Clear 3% 11 mph S 69%
1 AM 82° Clear 3% 11 mph S 72%
2 AM 81° Clear 3% 10 mph S 76%
3 AM 80° Clear 3% 8 mph S 79%
4 AM 79° Clear 3% 6 mph S 82%
5 AM 73° Mostly Clear 3% 6 mph S 84%
6 AM 72° Mostly Clear 3% 6 mph SSE 87%
7 AM 74° Mostly Clear 3% 6 mph S 81%
8 AM 76° Clear 3% 8 mph S 71%
9 AM 81° Clear 3% 10 mph S 62%
10 AM 86° Clear 3% 10 mph S 57%
11 AM 87° Clear 3% 10 mph S 53%
12 PM 89° Clear 3% 10 mph S 48%
1 PM 93° Clear 3% 11 mph S 46%
2 PM 94° Clear 3% 11 mph S 44%
15-Day Forecast
Today
9/13
Clear
3%
72°
99°
Mon
9/14
Clear
3%
72°
102°
Tue
9/15
Clear
3%
69°
102°
Wed
9/16
Clear
38%
68°
98°
Thu
9/17
Drizzle
43%
73°
97°
Fri
9/18
Clear
3%
72°
98°
Sat
9/19
Clear
19%
71°
97°
Sun
9/20
Clear
60%
72°
95°
Mon
9/21
Drizzle
90%
65°
93°
Tue
9/22
Drizzle
60%
63°
92°
Wed
9/23
Drizzle
60%
68°
91°
Thu
9/24
Drizzle
60%
70°
90°
Fri
9/25
Drizzle
60%
69°
90°
Sat
9/26
Clear
60%
68°
90°
Sun
9/27
Drizzle
60%
69°
90°
32
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
32 AQI 5.9 µg/m³
O3
Ground-level ozone
Dominant
32 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 32 Good 32 32
Tue 34 Good 34 23
Wed 35 Good 35 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 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
SBCAPE2444 J/kg
MLCAPE1267 J/kg
MUCAPE2444 J/kg
SBCIN-0 J/kg
MLCIN-12 J/kg
Lifted Index-4.5
Kinematics
0–6 km Shear10 kt
0–1 km Shear2 kt
Eff. Shear8 kt
0–1 km SRH2
0–3 km SRH14
Eff. SRH14
Storm Motion130° @ 18 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index37.0
Thermo & Levels
PWAT1.69 in
0–3 km LR9.0 °C/km
700–500 LR5.4 °C/km
Total Totals47.6
LCL772 hPa
LFC985 hPa
EL148 hPa
Freezing Lvl16,253 ft