Heat Advisory — Harper, OK, Woods, OK, Alfalfa, OK, Grant, OK, Kay, OK, Ellis, OK, Woodward, OK, Major, OK, Garfield, OK, Noble, OK, Roger Mills, OK, Dewey, OK, Custer, OK, Blaine, OK, Kingfisher, OK, Logan, OK, Beckham, OK, Washita, OK, Caddo, OK, Canadian, OK, Oklahoma, OK, Grady, OK, McClain, OK, Cleveland, OK, Pottawatomie, OK, Seminole, OK, Harmon, OK, Greer, OK, Kiowa, OK, Jackson, OK, Tillman, OK, Comanche, OK, Stephens, OK, Garvin, OK, Murray, OK, Pontotoc, OK, Cotton, OK, Jefferson, OK, Carter, OK, Johnston, OK, Love, OK, Marshall, OK, Hardeman, TX, Foard, TX, Wilbarger, TX, Wichita, TX, Knox, TX, Baylor, TX, Archer, TX, Clay, TX 9:00 PM

Johnston County, Oklahoma, United States

Last updated: 5:19 PM CDT  ·  Refresh
37°C
Feels like 39°
Mostly Clear
▲ 37°  /  ▼ 23°
Wind
10 mph SSE
Humidity
35%
Dew Point
19°
Pressure
28.92 inHg
Visibility
9 mi
UV Index
6.9
Cloud Cover
22%
Sunrise
6:35 AM
Sunset
8:30 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Johnston County is currently mostly clear at 37°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 621 J/kg) — isolated convective development possible. Sunrise: 6:35AM · Sunset: 8:30PM.

Alerts

Heat Advisory
Harper, OK, Woods, OK, Alfalfa, OK, Grant, OK, Kay, OK, Ellis, OK, Woodward, OK, Major, OK, Garfield, OK, Noble, OK, Roger Mills, OK, Dewey, OK, Custer, OK, Blaine, OK, Kingfisher, OK, Logan, OK, Beckham, OK, Washita, OK, Caddo, OK, Canadian, OK, Oklahoma, OK, Grady, OK, McClain, OK, Cleveland, OK, Pottawatomie, OK, Seminole, OK, Harmon, OK, Greer, OK, Kiowa, OK, Jackson, OK, Tillman, OK, Comanche, OK, Stephens, OK, Garvin, OK, Murray, OK, Pontotoc, OK, Cotton, OK, Jefferson, OK, Carter, OK, Johnston, OK, Love, OK, Marshall, OK, Hardeman, TX, Foard, TX, Wilbarger, TX, Wichita, TX, Knox, TX, Baylor, TX, Archer, TX, Clay, TX
Expires 9:00 PM
54 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
37°
3%
6 PM
37°
3%
7 PM
36°
3%
8 PM
34°
3%
9 PM
32°
3%
10 PM
29°
3%
11 PM
28°
3%
12 AM
27°
3%
1 AM
26°
3%
2 AM
27°
3%
3 AM
26°
3%
4 AM
25°
3%
5 AM
25°
3%
6 AM
23°
3%
7 AM
23°
3%
8 AM
26°
3%
9 AM
27°
3%
10 AM
29°
3%
11 AM
31°
3%
12 PM
33°
3%
1 PM
34°
3%
2 PM
35°
3%
3 PM
36°
3%
4 PM
36°
3%
7-Day Forecast
Today
37° 23°
Mostly Clear.
Thu
38° 23°
Partly Cloudy.
Fri
39° 24°
Partly Cloudy with a 22% chance of rain.
Sat
34° 22°
Mostly Clear.
Sun
35° 19°
Clear.
Mon
37° 20°
Clear.
Tue
38° 22°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 37° Mostly Clear 3% 10 mph SSE 35%
6 PM 37° Mostly Clear 3% 10 mph SSE 36%
7 PM 36° Mostly Clear 3% 10 mph SSE 38%
8 PM 34° Mostly Clear 3% 8 mph SSE 40%
9 PM 32° Partly Cloudy 3% 7 mph SSE 43%
10 PM 29° Partly Cloudy 3% 7 mph SSE 47%
11 PM 28° Partly Cloudy 3% 7 mph SSE 53%
12 AM 27° Partly Cloudy 3% 6 mph SSE 58%
1 AM 26° Partly Cloudy 3% 6 mph SSE 63%
2 AM 27° Partly Cloudy 3% 5 mph SSE 66%
3 AM 26° Mostly Clear 3% 5 mph SSE 68%
4 AM 25° Mostly Clear 3% 5 mph SSE 71%
5 AM 25° Partly Cloudy 3% 4 mph SE 72%
6 AM 23° Partly Cloudy 3% 5 mph SSE 74%
7 AM 23° Partly Cloudy 3% 5 mph SSE 73%
8 AM 26° Mostly Cloudy 3% 6 mph S 67%
9 AM 27° Mostly Cloudy 3% 7 mph SSW 60%
10 AM 29° Mostly Cloudy 3% 7 mph SSW 53%
11 AM 31° Partly Cloudy 3% 7 mph SSW 47%
12 PM 33° Partly Cloudy 3% 7 mph S 42%
1 PM 34° Partly Cloudy 3% 8 mph S 39%
2 PM 35° Partly Cloudy 3% 8 mph S 38%
3 PM 36° Partly Cloudy 3% 8 mph S 37%
4 PM 36° Partly Cloudy 3% 8 mph S 37%
15-Day Forecast
Today
7/29
Mostly Clear
3%
23°
37°
Thu
7/30
Partly Cloudy
6%
23°
38°
Fri
7/31
Partly Cloudy
22%
24°
39°
Sat
8/1
Mostly Clear
14%
22°
34°
Sun
8/2
Clear
8%
19°
35°
Mon
8/3
Clear
17%
20°
37°
Tue
8/4
Clear
17%
22°
38°
Wed
8/5
Clear
18%
24°
38°
Thu
8/6
Clear
18%
25°
39°
Fri
8/7
Mostly Clear
19%
25°
39°
Sat
8/8
Clear
25%
23°
39°
Sun
8/9
Clear
25%
26°
40°
Mon
8/10
Clear
25%
26°
41°
Tue
8/11
Clear
25%
27°
41°
Wed
8/12
Drizzle
60%
27°
41°
54
Moderate
U.S. Air Quality Index · Dominant: PM2.5
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
Dominant
54 AQI 10.8 µg/m³
O3
Ground-level ozone
46 AQI 50 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 54 Moderate 46 54
Fri 59 Moderate 45 59
Sat 55 Moderate 40 55
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 Wed Jul 29, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE797 J/kg
MLCAPE367 J/kg
MUCAPE797 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-3.0
Kinematics
0–6 km Shear23 kt
0–1 km Shear2 kt
Eff. Shear25 kt
0–1 km SRH8
0–3 km SRH-27
Eff. SRH-27
Storm Motion270° @ 13 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index34.2
Thermo & Levels
PWAT2.00 in
0–3 km LR8.3 °C/km
700–500 LR5.9 °C/km
Total Totals46.7
LCL754 hPa
LFC979 hPa
EL178 hPa
Freezing Lvl16,516 ft