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, Payne, OK, Beckham, OK, Washita, OK, Caddo, OK, Canadian, OK, Oklahoma, OK, Lincoln, OK, Grady, OK, McClain, OK, Cleveland, OK, Pottawatomie, OK, Seminole, OK, Hughes, OK, Harmon, OK, Greer, OK, Kiowa, OK, Jackson, OK, Tillman, OK, Comanche, OK, Stephens, OK, Garvin, OK, Murray, OK, Pontotoc, OK, Coal, OK, Cotton, OK, Jefferson, OK, Carter, OK, Johnston, OK, Atoka, OK, Love, OK, Marshall, OK, Bryan, OK, Hardeman, TX, Foard, TX, Wilbarger, TX, Wichita, TX, Knox, TX, Baylor, TX, Archer, TX, Clay, TX 8:00 PM

Johnston County, Oklahoma, United States

Last updated: 4:14 AM CDT  ·  Refresh
26°C
Feels like 28°
Clear
▲ 37°  /  ▼ 25°
Wind
7 mph SSW
Humidity
74%
Dew Point
22°
Pressure
29.11 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
1%
Sunrise
6:45 AM
Sunset
8:18 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Johnston County is currently clear at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2041 J/kg) — isolated convective development possible. Sunrise: 6:45AM · Sunset: 8:18PM.

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, Payne, OK, Beckham, OK, Washita, OK, Caddo, OK, Canadian, OK, Oklahoma, OK, Lincoln, OK, Grady, OK, McClain, OK, Cleveland, OK, Pottawatomie, OK, Seminole, OK, Hughes, OK, Harmon, OK, Greer, OK, Kiowa, OK, Jackson, OK, Tillman, OK, Comanche, OK, Stephens, OK, Garvin, OK, Murray, OK, Pontotoc, OK, Coal, OK, Cotton, OK, Jefferson, OK, Carter, OK, Johnston, OK, Atoka, OK, Love, OK, Marshall, OK, Bryan, OK, Hardeman, TX, Foard, TX, Wilbarger, TX, Wichita, TX, Knox, TX, Baylor, TX, Archer, TX, Clay, TX
Expires 8:00 PM
44 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
26°
3%
5 AM
26°
3%
6 AM
23°
3%
7 AM
23°
3%
8 AM
25°
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
37°
3%
7 PM
36°
3%
8 PM
34°
3%
9 PM
33°
3%
10 PM
31°
3%
11 PM
29°
3%
12 AM
28°
3%
1 AM
28°
3%
2 AM
29°
3%
3 AM
28°
3%
7-Day Forecast
Today
37° 25°
Clear.
Wed
40° 25°
Mostly Clear.
Thu
39° 24°
Clear.
Fri
39° 24°
Clear.
Sat
41° 24°
Clear.
Sun
42° 22°
Clear.
Mon
42° 23°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 26° Clear 3% 7 mph SSW 74%
5 AM 26° Clear 3% 8 mph SSW 74%
6 AM 23° Clear 3% 8 mph SSW 77%
7 AM 23° Clear 3% 8 mph SSW 77%
8 AM 25° Clear 3% 11 mph SSW 70%
9 AM 27° Clear 3% 12 mph SSW 63%
10 AM 29° Clear 3% 13 mph SSW 57%
11 AM 31° Clear 3% 13 mph SSW 51%
12 PM 32° Clear 3% 12 mph SSW 45%
1 PM 34° Clear 3% 12 mph SSW 40%
2 PM 36° Mostly Clear 3% 12 mph SSW 37%
3 PM 37° Mostly Clear 3% 12 mph SSW 35%
4 PM 37° Mostly Clear 3% 13 mph S 32%
5 PM 37° Mostly Clear 3% 13 mph S 33%
6 PM 37° Clear 3% 13 mph S 33%
7 PM 36° Clear 3% 13 mph S 34%
8 PM 34° Clear 3% 12 mph S 38%
9 PM 33° Clear 3% 12 mph S 42%
10 PM 31° Clear 3% 11 mph S 45%
11 PM 29° Clear 3% 11 mph S 47%
12 AM 28° Clear 3% 12 mph S 48%
1 AM 28° Clear 3% 12 mph S 50%
2 AM 29° Clear 3% 12 mph S 53%
3 AM 28° Clear 3% 12 mph SSW 56%
15-Day Forecast
Today
8/11
Clear
3%
25°
37°
Wed
8/12
Mostly Clear
3%
25°
40°
Thu
8/13
Clear
3%
24°
39°
Fri
8/14
Clear
3%
24°
39°
Sat
8/15
Clear
8%
24°
41°
Sun
8/16
Clear
8%
22°
42°
Mon
8/17
Clear
8%
23°
42°
Tue
8/18
Drizzle
43%
24°
41°
Wed
8/19
Clear
44%
24°
41°
Thu
8/20
Clear
19%
24°
41°
Fri
8/21
Clear
25%
26°
41°
Sat
8/22
Drizzle
60%
25°
41°
Sun
8/23
Drizzle
60%
25°
40°
Mon
8/24
Drizzle
60%
25°
39°
Tue
8/25
Drizzle
60%
24°
39°
44
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
24 AQI 4.4 µg/m³
O3
Ground-level ozone
Dominant
44 AQI 48 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 44 Good 44 24
Wed 43 Good 42 43
Thu 43 Good 43 34
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
SBCAPE988 J/kg
MLCAPE1271 J/kg
MUCAPE1832 J/kg
SBCIN-258 J/kg
MLCIN0 J/kg
Lifted Index-2.1
Kinematics
0–6 km Shear4 kt
0–1 km Shear14 kt
Eff. Shear15 kt
0–1 km SRH-26
0–3 km SRH26
Eff. SRH47
Storm Motion171° @ 19 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index32.4
Thermo & Levels
PWAT1.66 in
0–3 km LR5.3 °C/km
700–500 LR5.7 °C/km
Total Totals46.0
LCL920 hPa
LFC698 hPa
EL196 hPa
Freezing Lvl15,669 ft